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Academic literature on the topic 'Digestibility coefficient'
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Journal articles on the topic "Digestibility coefficient"
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Hisano, Hamilton, Marco Aurélio Lopes Della Flora, José Luiz Pilecco, and Simone Mendonça. "Apparent digestibility of nutrients, energy, and amino acid of nontoxic and detoxified physic nut cakes for Nile tilapia." Pesquisa Agropecuária Brasileira 50, no. 9 (September 2015): 849–53. http://dx.doi.org/10.1590/s0100-204x2015000900014.
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Abstract:The objective of this work was to evaluate the apparent digestibility coefficients of nutrients, energy, and amino acids of nontoxic and detoxified physic nut cakes treated with solvent plus posterior extrusion, for Nile tilapia. The apparent digestibility coefficients of crude protein and gross energy were higher for detoxified than for nontoxic physic nut cake. However, the apparent digestibility coefficient of ether extract of the nontoxic physic nut cake was higher than that of the detoxified one. The apparent digestibility coefficient of amino acids of both feed ingredients was superior to 80%, except for glycine, for the nontoxic psychic nut cake, and for threonine, for the detoxified one. Nontoxic and detoxified physic nut cakes show apparent digestibility coefficient values equivalent to those of the other evaluated oilseeds and potential for inclusion in Nile tilapia diets.
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Lyberg, K., T. Lundh, C. Pedersen, and J. E. Lindberg. "Influence of soaking, fermentation and phytase supplementation on nutrient digestibility in pigs offered a grower diet based on wheat and barley." Animal Science 82, no. 6 (December 2006): 853–58. http://dx.doi.org/10.1017/asc2006109.
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AbstractThe effects of 1-h soaking, fermentation and phytase supplementation of a pig diet based on wheat and barley on ileal and total tract apparent digestibility in growing pigs fitted with a post valve T-caecum (PVTC)-cannula were studied. Eight animals in a two-period change-over design were used, subjecting four animals to each treatment (dry, soaked, microbial phytase supplemented or fermented diet). Acid insoluble ash was used as an indigestible marker for calculating apparent digestibility coefficients. Fermentation improved (P<0·05) the ileal apparent digestibility coefficients of organic matter (OM), nitrogen and amino acids, while there was no effect of 1-h soaking and phytase supplementation. The total tract apparent digestibility coefficient of OM was also improved by fermentation. The ileal apparent digestibility coefficient of phosphorus (P) was higher for fermentation (P<0·05) than for dry food and 1-h soaking. The total tract apparent digestibility coefficient of P was higher (P<0·05) for treated food (soaked, fermented and supplemented with microbial phytase) compared with dry food. Fermentation improved (P<0·05) the ileal apparent digestibility coefficient of calcium compared with dry and soaked food, and had no effect on the total tract apparent digestibility coefficient of calcium. Food inositol phosphates were affected by treatment (P<0·05), with a reduction of P bound to inositol hexaphosphate (IP6) of 10% in the 1-h soaked food and of 80% in the fermented food. Degradation of IP6in the gastro-intestinal tract of the animals was lower in the fermented food than in the other treatments. The content of neutral-detergent fibre in the food was reduced (P<0·05) in the soaked and fermented food by 4% and 14%, respectively, compared with the dry food. In conclusion, fermentation of food can improve digestibility of OM, degrade IP6and increase ileal digestibility of phosphorus, nitrogen and amino acids.
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Pamungkas, Wahyu, Dedi Jusadi, and Nur Bambang Priyo Utomo. "THE EFFECTIVITY TEST OF SHEEP RUMEN LIQUOR ENZYME ADDED TO PALM KERNEL MEAL ON ITS DECREASE OF CRUDE FIBER AND APPARENT DIGESTIBILITY COEFFICIENT FOR CATFISH Pangasius hypophthalmus DIET." Indonesian Aquaculture Journal 6, no. 2 (December 31, 2011): 149. http://dx.doi.org/10.15578/iaj.6.2.2011.149-156.
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Two experiments were conducted to evaluate the hydrolysis of fiber content in palm kernel meal (PKM) by sheep rumen liquor enzyme and to know the apparent digestibility coefficient of hydrolyzed PKM for catfish Pangasius hypophthalmus. The first trial examined effectivity of sheep rumen liquor enzyme to decrease crude fiber content of PKM. The added volume of sheep rumen liquor enzyme was 0, 20, 40, 60, 80, and 100 mL/kg PKM and then it was incubated for 0, 12, and 24 hours. A factorial completely randomized experimental design consisted of 2 variables and triplicates were selected. The second trial was conducted to evaluate the apparent digestibility coefficients of hydrolized PKM for catfish. Apparent digestibility coefficients were determined using chromic oxide indicator added to both reference and test diets. The feed ingredients used in the trial were hydrolyzed PKM (PKMe) and unhydrolyzed PKM (PKM). Ten fishes with weighing around 20 g were used in the trial and held in 80 l tanks. Feces were collected from three replicate groups of fish using a fecal collection column attached to fish rearing tank. PKM hydrolyzed with 100 mL/kg and incubated for 24 hour showed the lowest crude fiber content (6.99%) among the treatments (P<0.05). Apparent digestibility coefficient of hydrolyzed PKM was 57.57% compared with unhydrolyzed PKM 15.31%. Based on the evaluation in those parameters it was concluded that sheep rumen liquor enzyme added to PKM was effective to decrease crude fiber content of PKM and improve apparent digestibility coefficient of PKM for catfish.
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Vojtíšková, Petra, and Stanislav Kráčmar. "Crude protein, fibre and phytic acid in vitro digestibility of selected legume and buckwheat samples." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 61, no. 1 (2013): 227–32. http://dx.doi.org/10.11118/actaun201361010227.
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The aim of this study was to determine crude protein, fibre and phytic acid in vitro digestibility of selected legumes and buckwheat products. All analyses except the phytic acid contents were performed in the line with the Commission Regulation (EC) No. 152/2009. A modified version of Holt’s Method was used for phytic acid (phytate) determination. None of all samples contained more than 11% of moisture. Soybeans are rich in crude protein; they contain nearly 40% of this compound. The content of crude protein in buckwheat flours was about 14%. The highest amount of phytate was found in common beans and soybeans-about 2 g/100 g of dry matter. On the other hand, the lowest phytate content was observed in buckwheat pasta (< 1 g/100 g). The quantification of phytate in F. esculentum groats was 1.9 g per 100 g of dry matter. In vitro digestibility was determined using an incubator Daisy and pepsin enzymes and the combination of pepsin and pancreatin. The highest coefficient of crude protein digestibility was discovered to be in peels and wholemeal flour. The greatest fibre digestibility coefficients were obtained for peels, which contain about 65% of fibre in their dry matter. When pepsin was used, a higher phytic acid digestibility coefficient for G. max, Ph. vulgaris, peels, flour, groats and broken groats was observed; while when the combination of pepsin and pancreatin was used, higher phytic acid digestibility coefficients for peas, lentil and wholemeal flour were observed.
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Sofyan, Muh, I. G. L. O. Cakra, and I. G. A. A. Putra. "Consumption, nutrient digestibility and nitrogen retention in pe goats received ransum with various levels of gamal (gliricidiasepium) balance versus concentrate." International journal of life sciences 4, no. 1 (February 10, 2020): 50–57. http://dx.doi.org/10.29332/ijls.v4n1.380.
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The research aims to determine the consumption, nutrient digestibility and nitrogen retention in PE goats, which has been carried out in Sidemen Village, Karangasem, Bali and in the Lab. Animal Nutrition and Feed at Udayana University. The research design used was the Latin Square Design (LSD) with treatment consisting of (P1) 55% field grass with 45% concentrate; (P2) 55% field grass with 15% Gamal and 30% concentrate; (P3) 55% field grass with 30% Gamal and 15% concentrate; (P4) 55% field grass with 45% Gamal. Research variables include consumption, nutrient digestibility and nitrogen retention. The results showed the consumption of dry matter and crude protein between treatments was not significantly different (P> 0.05). Crude fiber consumption of P4 treatment was significantly (P <0.05) higher than P1, but P4 was not significant (P> 0.05) higher than P2 and P3. The dry matter digestibility coefficient and crude fiber digestibility coefficient between treatments were statistically significantly different (P> 0.05). The digestibility coefficient of organic matter, crude protein digestion coefficient and nitrogen retention in the P1 treatment were not significantly (P> 0.05) higher than P2, but P1 was significantly (P <0.05) higher than P3 and P4.
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Zadinelo, Izabel Volkweis, Lilian Dena Santos, Helton José Alves, Rafaela Mocochinski Gonçalves, Marlise Teresinha Mauerwerk, Lilian Carolina Rosa Silva, Eduardo Luis Cupertino Ballester, and Robie Allan Bombardelli. "Apparent digestibility coefficient of chitosan foam for nile tilapia." Brazilian Journal of Development 6, no. 3 (2020): 10044–59. http://dx.doi.org/10.34117/bjdv6n3-036.
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Logato, Priscila Vieira Rosa, Norka da Silva Albernaz, Paula Adriane Perez Ribeiro, Rilke Tadeu Fonseca de Freitas, and Elias Tadeu Fialho. "Effect of the ration processing on the apparent digestibility values of nutrients for the piau (Leporinus elongatus)." Ciência e Agrotecnologia 33, no. 3 (June 2009): 890–94. http://dx.doi.org/10.1590/s1413-70542009000300032.
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The experiment carried out at National Center for Research in Tropical Fish Pirassununga, SP, aiming to determine the effect of the ration processing on the apparent digestibility coefficients of the ingredients for the piau (L. elongatus). A total of 600 males of piau were utilized, allotted into six ponds of 300L. The applied treatments were: grinder processed ration, pelleting ration and extruded ration, utilizing rations with 32% crude protein and 3400 Kcal DE.Kg-1. The experiment was in a randomized blocks design with three treatments, three blocks and two replicates. The data were submitted to variance analysis by the SAEG computational package and the means of the treatments compared by SNK test (5% of significance). The results showed that there were significant differences among the digestibility coefficients of both protein and energy for the pelleted and extrused rations (P<0.05). The results showed no statistical differences for the apparent digestibility coefficient of the dry matter (P>0.05).
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Idowu, O. M. O. "The effect of graded levels of Magnesium Sulphate (MgSO4) in practical broiler starter diets in the humid tropics." Nigerian Journal of Animal Production 38, no. 2 (February 1, 2021): 122–38. http://dx.doi.org/10.51791/njap.v38i2.2803.
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A total of 144 day-old Anak 2000 strain of broiler chicks were used in the study. A basal diet was formulated and supplemented at 0, 200, 400, 600 mg kg of MgSO4 to constitute four dietary treatments. The birds were randomly allotted to the four dietary treatment groups and replicated thrice (12 birds per replicate). The performance characteristics, rutrient digestion coefficients, Mg utilization coefficients and haematological and biochemical parameters of the birds were determined Feed conversion ratio, crude protein retention, Mg utilization and blood parameters were highest in birds fed diet containing 400mg kg MgSO4 There were significant (p<0.05) differences in the final body weight, weight gain, Feed Conversion Ratio (FCR), Protein Efficiency Ratio (PER) and crude protein retention Liver Mg content, Mg intake and excretion increased significantly in a dosage dependent manner. Nutrients digestibility increased significantly as Mg levels increased from 0 to 400mg though, digestibility coefficients of Mg were significantly (p>0.05) depressed across treatments. However, serum Mg, Mg digestibility coefficient and tissue Mg residue were similar across treatment groups. The results showed that inclusion of 400mg kg supplemental MgSO4 in practical broiler starter diets resulted in improved performance and nutrients digestibility of the birds.
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Araujo, Daniel de Magalhães, Ademir Calvo Fernandes Júnior, Fernando Kojima Nakagome, André Moreira Bordinhon, Margarida Maria Barros, and Luiz Edivaldo Pezzato. "Apparent Digestibility Coefficient of Proteic and Energetic Ingredients for Goldfish." Ensaios e Ciência C Biológicas Agrárias e da Saúde 24, no. 1 (May 27, 2020): 16–21. http://dx.doi.org/10.17921/1415-6938.2020v24n1p16-21.
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Kinguios são uma das mais importantes espécies de peixes ornamentais criadas mundialmente, entretanto, são insuficientes os estudos com digestibilidade de ingredientes para a espécie. O objetivo com este estudo foi determinar os coeficientes de digestibilidade aparentes (CDAs) da matéria seca, proteína bruta e energia bruta de ingredientes energéticos (quirera de arroz, farinha de milho e farelo de trigo) e proteicos (farelo de soja, farinha de peixe, farinha de vísceras de aves) para kinguios (Carassius auratus). O óxido de cromo III foi usado como marcador inerte. Os CDAs da matéria seca e energia dos ingredients energéticos foram, em ordem decrescente: quirera de arroz (97,19 e 94,55%), farinha de milho (76,61 e 77,65%) e farelo de trigo (45.43 e 48.83%); enquanto nos ingredientes proteicos foram: farelo de soja (72,14 e 73,54%), farinha de vísceras de aves (61,77 e 69,50%) e farinha de peixe (47,48 e 60,65%). CDAs da proteína foram mais altos para o farelo de soja (96,11%) e de milho (90,77%), enquanto os menores valores foram observados para a farinha de peixe (75,53%) e farelo de trigo (73,06%). Em geral, os nutrientes da quirera de arroz e do farelo de soja foram aproveitados mais eficientemente pelos peixes. Ainda que todos os ingredientes estudados sejam passíveis de uso em dietas de kinguios, o farelo de trigo deve ser utilizado com precaução, em decorrência da baixa digestibilidade.
Palavras-chave: Carassius auratus. Farinha de Peixe. Farinha de Vísceras de Aves. Milho. Quirera de Arroz.
Abstract
Kinguios are one of the most important ornamental fish, however the studies about ingredients digestibility for this species are insufficient. The objective of this study was to determine apparent digestibility coefficients (ADC) of dry matter, gross energy and crude protein of energetic (broken rice, corn meal, and wheat bran) and proteic (soybean meal, fishmeal and poultry by-product meal) feedstuffs for goldfish (Carassius auratus). Chromium oxide III was used as an external marker. The digestibility values of dry matter and energy, in decreasing order, were higher for broken rice (97.19 and 94.55%), corn meal (76.61 and 77.65%) and wheat bran (45.43 and 48.83%) in energetic ingredients; and soybean meal (72.14 and 73.54%), poultry by-product meal (61.77 and 69.50%) and fish meal (47.48 and 60.65%) in proteic ingredients. Protein digestibility values were higher for soybean meal (96.11%) and corn meal (90.77%) and the lowest values were observed for fishmeal (75.53%) and wheat bran (73.06%). In general, broken rice and soybean meal nutrients were more efficiently used by fish. Although all the studied ingredients are suitable for use in diets for goldfish, wheat bran should be used with caution because of its low digestibility.
Keywords: Carassius auratus. Corn, Broken Rice. Fishmeal. Poultry Meal.
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Asad, Farkhanda, Samina Qamer, Asma Ashraf, Azhar Rafique, Zunaira Shaheen, Ayesha Nisar, and Sidra Javaid. "Apparent nutrient digestibility of carbohydrate (corn) in Cirrhinus mrigala under the influence of chromium chloride hexahydrate." Brazilian Journal of Biology 80, no. 3 (September 2020): 518–22. http://dx.doi.org/10.1590/1519-6984.214176.
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Abstract A feeding trial was carried out to assess the effect of dietary chromium supplementation on apparent nutrient digestibility coefficient (%) of gelatinized and non-gelatinized corn in Cirrhinus mrigala fingerlings for 90 days. Using various levels of chromium chloride hexahydrate six test diets designated as T1 (G/0.0 Cr2Cl3.6H2O mg Kg-1), T2 (NG/0.0 Cr2Cl3.6H2O mg Kg-1), T3 (G/0.2 Cr2Cl3.6H2O mg Kg-1), T4 (NG/0.2 Cr2Cl3.6H2O mg Kg-1), T5 (G/0.4 Cr2Cl3.6H2O mg Kg-1) and T6 (NG/0.4 Cr2Cl3.6H2O mg Kg-1) were prepared. Results showed highest apparent digestibility coefficient (ADC) of nutrients dry matter, crude lipid and gross energy in test diet T5 that was gelatinized and supplemented with chromium 0.4 mg/Kg while, for crude protein higher value of nutrient digestibility was recorded in T3 test diet (G/0.2 Cr2Cl3.6H2O mg/Kg). It was concluded that chromium supplementation with gelatinized corn in fish (Cirrhinus mrigala) diet can improve the nutrients digestibility more efficiently.
Dissertations / Theses on the topic "Digestibility coefficient"
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Santos, Vivian Maia dos. "Níveis de prebiótico em substituição ao antibiótico em dietas para leitões recém - desmamados /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/99605.
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Orientador: Maria Cristina ThomazBanca: Jane Maria Bertocco Ezequiel
Banca: Rafael Neme
Resumo: Foram conduzidos três experimentos, com o objetivo de avaliar os efeitos da adição de diferentes níveis de prebiótico na alimentação de leitões, sobre o desempenho, desenvolvimento da mucosa intestinal, parâmetros fisiológicos, digestibilidade e metabolismo de suínos. O prebiótico utilizado foi o mananoligossacarídeo MOS. No 1º experimento, foram avaliados o desempenho e a incidência de diarréia em 30 leitões fêmeas, dos 22 aos 63 dias de idade, com peso inicial de 6,28 l 1,40 kg. A utilização de MOS nas rações de leitões recém - desmamados piorou o ganho de peso dos animais dos 22 aos 63 dias de idade, porém não teve efeito sobre a incidência de diarréia. No 2º experimento foram avaliadas a morfometria do intestino delgado e mensurados os pesos do fígado e do pâncreas, assim como, o pH dos conteúdos do estômago, intestino delgado e ceco. Foram utilizados 15 leitões fêmeas dos 22 aos 63 dias de idade, com peso inicial de 5,74 l 0,93 kg. Em ambos os experimentos, os tratamentos foram: Controle positivo CP (Dieta basal + antibiótico); Controle negativo - CN (Dieta basal); CN + 0,25% de Prebiótico; CN + 0,50% de Prebiótico; CN + 0,75% de Prebiótico, e utilizou-se o delineamento em blocos ao acaso para controlar diferenças inicias de peso. Não foram observadas diferenças em nenhum dos parâmetros avaliados. No 3º experimento foram determinadas as digestibilidades dos nutrientes e da energia e o coeficiente de metabolizabilidade da energia e a energia metabolizável, das rações controle e com 0,5% de prebiótico. Utilizou-se 16 suínos machos castrados, com peso médio de 24,8 l 2,79 kg, e os blocos controlaram a repetição no tempo...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Three experiments were set to evaluate the effects of adding different levels of mannanoligossacharides (MOS, prebiotic) to the diet of piglets on their performance, development of intestinal mucosa, physiological parameters, digestibility and metabolism.. Corn and soybean meal were the major feed components. The first experiment evaluated the development and occurrence of diarrhea in 30 female piglets at 22 and 63 days of age, with an initial weight of 6.28 l 1.40 kg. Prebiotic additions to the diets worsen the growth performance of animals in Phase 3, but did not influence on the diarrhea incidence. The second experiment evaluated the morphometry of the small bowel, liver and pancreas weight, and the pH of stomach, small bowel and cecum contents. Fifteen female piglets were used at 22 and 63 days of age, with an initial weight of 5.74 l 0.93 kg. Both experiments were arranged in randomized blocks design to control initial weight difference, with the following treatments: positive control PC (base diet + antibiotic); negative control - NC (base diet); NC + 0.25% of prebiotic; NC + 0.50% of prebiotic; NC + 0.75% of prebiotic. No significant difference was observed in any of the studied parameters. In the third experiment, nutrient and energy digestibility were determined in feeds containing prebiotic (0.5%) or not (control). Sixteen castrated male pigs weighing 24.8 l 2.79 kg were used, and randomized blocks design was used so blocks controlled replications during time. Nutrient digestibility and feed energy were determined through the total feces collection method, using ferric oxide as fecal marker. The digestibility coefficient of the mineral matter and the digestible mineral matter were higher (P<0.05) in the control feed than in the feed containing prebiotic...(Complete abstract, click electronic address below)
Mestre
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Santos, Vivian Maia dos [UNESP]. "Níveis de prebiótico em substituição ao antibiótico em dietas para leitões recém - desmamados." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/99605.
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Foram conduzidos três experimentos, com o objetivo de avaliar os efeitos da adição de diferentes níveis de prebiótico na alimentação de leitões, sobre o desempenho, desenvolvimento da mucosa intestinal, parâmetros fisiológicos, digestibilidade e metabolismo de suínos. O prebiótico utilizado foi o mananoligossacarídeo MOS. No 1º experimento, foram avaliados o desempenho e a incidência de diarréia em 30 leitões fêmeas, dos 22 aos 63 dias de idade, com peso inicial de 6,28 l 1,40 kg. A utilização de MOS nas rações de leitões recém - desmamados piorou o ganho de peso dos animais dos 22 aos 63 dias de idade, porém não teve efeito sobre a incidência de diarréia. No 2º experimento foram avaliadas a morfometria do intestino delgado e mensurados os pesos do fígado e do pâncreas, assim como, o pH dos conteúdos do estômago, intestino delgado e ceco. Foram utilizados 15 leitões fêmeas dos 22 aos 63 dias de idade, com peso inicial de 5,74 l 0,93 kg. Em ambos os experimentos, os tratamentos foram: Controle positivo CP (Dieta basal + antibiótico); Controle negativo - CN (Dieta basal); CN + 0,25% de Prebiótico; CN + 0,50% de Prebiótico; CN + 0,75% de Prebiótico, e utilizou-se o delineamento em blocos ao acaso para controlar diferenças inicias de peso. Não foram observadas diferenças em nenhum dos parâmetros avaliados. No 3º experimento foram determinadas as digestibilidades dos nutrientes e da energia e o coeficiente de metabolizabilidade da energia e a energia metabolizável, das rações controle e com 0,5% de prebiótico. Utilizou-se 16 suínos machos castrados, com peso médio de 24,8 l 2,79 kg, e os blocos controlaram a repetição no tempo...
Three experiments were set to evaluate the effects of adding different levels of mannanoligossacharides (MOS, prebiotic) to the diet of piglets on their performance, development of intestinal mucosa, physiological parameters, digestibility and metabolism.. Corn and soybean meal were the major feed components. The first experiment evaluated the development and occurrence of diarrhea in 30 female piglets at 22 and 63 days of age, with an initial weight of 6.28 l 1.40 kg. Prebiotic additions to the diets worsen the growth performance of animals in Phase 3, but did not influence on the diarrhea incidence. The second experiment evaluated the morphometry of the small bowel, liver and pancreas weight, and the pH of stomach, small bowel and cecum contents. Fifteen female piglets were used at 22 and 63 days of age, with an initial weight of 5.74 l 0.93 kg. Both experiments were arranged in randomized blocks design to control initial weight difference, with the following treatments: positive control PC (base diet + antibiotic); negative control - NC (base diet); NC + 0.25% of prebiotic; NC + 0.50% of prebiotic; NC + 0.75% of prebiotic. No significant difference was observed in any of the studied parameters. In the third experiment, nutrient and energy digestibility were determined in feeds containing prebiotic (0.5%) or not (control). Sixteen castrated male pigs weighing 24.8 l 2.79 kg were used, and randomized blocks design was used so blocks controlled replications during time. Nutrient digestibility and feed energy were determined through the total feces collection method, using ferric oxide as fecal marker. The digestibility coefficient of the mineral matter and the digestible mineral matter were higher (P<0.05) in the control feed than in the feed containing prebiotic...(Complete abstract, click electronic address below)
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Santos, Viviane Correa [UNESP]. "Grãos e subprodutos da canola na alimentação de ovinos." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/95232.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O objetivo foi o de estudar a introdução de grãos e sub-produtos (farelo ou torta) da canola em dietas para ovinos. Para a avaliação da digestibilidade foram utilizados 6 ovinos da raça Santa Inês machos não-castrados com idade entre 210 e 240 dias, peso corporal médio de 44,8 + 4,2 kg, adotando-se o método de coleta total de fezes. O delineamento foi em 2 Quadrados Latinos 3x3 e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Para a avaliação do desempenho e características quantitativas da carcaça, foram confinados 24 borregos machos não-castrados, desmamados com aproximadamente 70 dias de idade, peso corporal médio de 15 + 3 kg, utilizando delineamento inteiramente casualizado. As dietas foram compostas por 40% de feno de capim Tifton e 60% de concentrado composto por milho em grão, farelo de soja, canola em grão integral, farelo de canola, torta de canola e mistura mineral. Não houve diferença (P>0,05) para o consumo de matéria seca (MS), matéria orgânica (MO), extrato etéreo (EE), proteína bruta (PB), energia bruta (EB), fibra em detergente neutro (FDN) e carboidratos totais (CT) entre os tratamentos experimentais, no ensaio de digestibilidade. Não houve diferença (P>0,05) entre os tratamentos CG, FC e TC para a digestibiidade da MS, MO, EE, PB, EB, FDN e CT. Durante o experimento de desempenho, observou-se que os tratamentos contendo canola em grão integral apresentaram maiores ganhos de peso (0,24 kg/animal/dia). A conversão alimentar (4,87 kg MS/kg ganho) foi similar entre os tratamentos. A utilização de grãos e subprodutos da canola na dieta de borregos terminados em confinamento não influenciou (P>0,05) as características quantitativas da carcaça. Em relação aos rendimentos dos cortes, não houve efeito dos tratamentos para nenhuma das variáveis analisadas...
The aim oh this work was to evaluate introduction of grains and by-products (meal or cake) of canola in sheep diets. For digestive evaluate, 6 Santa Inês sheep with initial age and weight of 210 and 240 days and 44.8 + 4.2 kg, adapted to the use of bag, for collect feces. Animals were distributed in a replicated 3x3 Latin Square and means were compared by Tukeyþs test with 5% significance level. For performance evaluating and carcass quantitative characteristics, 24 Santa Ines hogget with initial age and weight of 70 days and 15 + 3kg, according to a completely randomized design. Diets were composed for 40% of Tifton hay and 60% of concentrate based on corn grain, soybean meal, whole grain canola, canola meal, canola cake and mineral mixture. There were no differences for the intake of dry matter (DM), organic matter (OM), ether extract (EE), crude protein (CP), crude energy (CE), neutral detergent fiber (NDF) and total carbohydrates (TC) among treatments, in digestibility trial. There were no differences for digestibilities of DM, OM, EE, CP, CE, NDF and TC among treatments. By the performance trial, it was found that diets with whole grain canola showed higher weight gains (0.24 kg/animal/day). Fed conversion (4.87 kg DM/kg gain) was similar among treatments. The use of whole grains and by-products of canola in the diet of lambs finished did not influence in the carcass quantitative characteristics. For the cuts dressing in relation to the CCW, no effect was observed for the analyzed variables among treatments. The evaluate of the non carcass components emphasized the representability of the skin weights (7.13%) in the percent determination. It was concluded that introduction of grains and by-products of canola allow satisfactory results, could be recommended in ration diet sheep formulations.
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Santos, Viviane Corrêa. "Grãos e subprodutos da canola na alimentação de ovinos /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/95232.
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Orientador: Jane Maria Bertocco EzequielBanca: Alexandre Amstalden Moraes Sampaio
Banca: Antonio Ferriani Branco
Resumo: O objetivo foi o de estudar a introdução de grãos e sub-produtos (farelo ou torta) da canola em dietas para ovinos. Para a avaliação da digestibilidade foram utilizados 6 ovinos da raça Santa Inês machos não-castrados com idade entre 210 e 240 dias, peso corporal médio de 44,8 + 4,2 kg, adotando-se o método de coleta total de fezes. O delineamento foi em 2 Quadrados Latinos 3x3 e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Para a avaliação do desempenho e características quantitativas da carcaça, foram confinados 24 borregos machos não-castrados, desmamados com aproximadamente 70 dias de idade, peso corporal médio de 15 + 3 kg, utilizando delineamento inteiramente casualizado. As dietas foram compostas por 40% de feno de capim Tifton e 60% de concentrado composto por milho em grão, farelo de soja, canola em grão integral, farelo de canola, torta de canola e mistura mineral. Não houve diferença (P>0,05) para o consumo de matéria seca (MS), matéria orgânica (MO), extrato etéreo (EE), proteína bruta (PB), energia bruta (EB), fibra em detergente neutro (FDN) e carboidratos totais (CT) entre os tratamentos experimentais, no ensaio de digestibilidade. Não houve diferença (P>0,05) entre os tratamentos CG, FC e TC para a digestibiidade da MS, MO, EE, PB, EB, FDN e CT. Durante o experimento de desempenho, observou-se que os tratamentos contendo canola em grão integral apresentaram maiores ganhos de peso (0,24 kg/animal/dia). A conversão alimentar (4,87 kg MS/kg ganho) foi similar entre os tratamentos. A utilização de grãos e subprodutos da canola na dieta de borregos terminados em confinamento não influenciou (P>0,05) as características quantitativas da carcaça. Em relação aos rendimentos dos cortes, não houve efeito dos tratamentos para nenhuma das variáveis analisadas...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The aim oh this work was to evaluate introduction of grains and by-products (meal or cake) of canola in sheep diets. For digestive evaluate, 6 Santa Inês sheep with initial age and weight of 210 and 240 days and 44.8 + 4.2 kg, adapted to the use of bag, for collect feces. Animals were distributed in a replicated 3x3 Latin Square and means were compared by Tukeyþs test with 5% significance level. For performance evaluating and carcass quantitative characteristics, 24 Santa Ines hogget with initial age and weight of 70 days and 15 + 3kg, according to a completely randomized design. Diets were composed for 40% of Tifton hay and 60% of concentrate based on corn grain, soybean meal, whole grain canola, canola meal, canola cake and mineral mixture. There were no differences for the intake of dry matter (DM), organic matter (OM), ether extract (EE), crude protein (CP), crude energy (CE), neutral detergent fiber (NDF) and total carbohydrates (TC) among treatments, in digestibility trial. There were no differences for digestibilities of DM, OM, EE, CP, CE, NDF and TC among treatments. By the performance trial, it was found that diets with whole grain canola showed higher weight gains (0.24 kg/animal/day). Fed conversion (4.87 kg DM/kg gain) was similar among treatments. The use of whole grains and by-products of canola in the diet of lambs finished did not influence in the carcass quantitative characteristics. For the cuts dressing in relation to the CCW, no effect was observed for the analyzed variables among treatments. The evaluate of the non carcass components emphasized the representability of the skin weights (7.13%) in the percent determination. It was concluded that introduction of grains and by-products of canola allow satisfactory results, could be recommended in ration diet sheep formulations.
Mestre
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Mansoori, Behzad. "Tannin/protein interactions : effects on digestibility coefficients and endogenous losses in broilers." Thesis, University of Aberdeen, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301201.
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Tannic acid was shown to increase weight loss, and total excretion of endogenous dry matter, nitrogen, uric acid, amino acids, energy and minerals (calcium, magnesium and phosphorus) in broilers. There was a positive linear correlation between the amount of tannic acid dosed, and the weight and endogenous losses. A variation in the excretion of individual amino acids and minerals in response to dosed tannic acid was also noted. The mechanisms of increased endogenous losses of the birds as influenced by tannic acid were investigated and discussed. Feeding gelatin and casein significantly reduced the adverse effects of tannic acid on weight and endogenous losses. There were also significant improvements in digestibility coefficients and metabolisable energy values of protein in tannic acid dosed birds when the amount of the protein increased. Although in birds not dosed with tannic acid, casein had a higher digestibility and metabolisable energy compared to gelatin, tannic acid dosed birds showed greater improvements in digestibility coefficients when receiving gelatin. The above contrast was possible because of the higher affinity of gelatin for tannic acid compared to the casein. Polyethylene glycol (PEG) was shown to alleviate the weight and endogenous losses of tannic acid dosed birds not receiving protein. Polyethlene glycol also reduce the endogenous losses as well as improved the digestibility coefficients and metabolisable energy values of tannic acid dosed birds when receiving the lower amounts of gelatin (6g) or casein (6 and 12g). However, the effect of PEG was less apparent in tannic acid dosed birds receiving the higher amounts of gelatin (12 and 18g) and casein (18g). In conclusion, the presence of tannins in poultry diets are likely to increase the endogenous losses of organic materials as well as minerals, but this is likely to depend on the type and amount of diet ingredients such as proteins and additives (eg. PEG).
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Pace, Steven Alan. "Feeding frequency and water temperature impact apparent digestibility coefficients of sablefish (Anoplopoma fimbria)." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/43915.
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Integrated multi-trophic aquaculture (IMTA) is a sustainable form of polyculture that holds promise in alleviating sustainability and environmental concerns facing current aquaculture practices. For sablefish (Anoplopoma fimbria) to be considered for use in IMTA systems, information on the digestibility of the diets by this species is needed. These data are critically important in establishing the necessary relationships between various species in IMTA networks. The effects of feeding frequency and water temperature on the apparent digestibility coefficients of juvenile sablefish were assessed in two separate experiments. In experiment 1 the effect of feeding frequency on apparent digestibility of a commercial feed (supplemented with chromic oxide as an indigestible marker) was determined by feeding juvenile sablefish either once, twice, or three times per day. In experiment 2 the effect of water temperature on apparent digestibility coefficients of the feed was determined in groups of sablefish reared at 8 ºC and 11.5 ºC. In both experiments the feed and faeces were analyzed for chromic oxide, ash, moisture, protein, and energy content and the resulting data were used to calculate apparent digestibility coefficients (ADC) for crude protein (CP), gross energy (GE), and organic matter (OM). Results from Experiment 1 indicate that feeding frequency had an effect on all ADC; with lower values of digestibility found with higher feeding frequencies (p ≤ 0.05). In Experiment 2 fish maintained at 11.5 ᵒC had higher ADC compared to those at 8.0 ˚C (p ≤ 0.05). This new information will be applied to a future IMTA ecosystem model, in an effort to enhance system efficiency.
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Mobiglia, Andrea de Mello. "Digestibilidade aparente da dieta de touros da raça nelore selecionados pelo consumo alimentar residual." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/3494.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Owing to the potential of utilization of residual feed intake as tool for genetic selection becomes indispensable the studies that looking for understand the variables influence RFI, principally data from cattle of Nellore breed, consist with Brazilian reality. The aim of this study was to evaluate the apparent digestibility of diet of Nellore bulls classified by residual feed intake (RFI). One hundred and twenty Nellore bulls were used , with body weight (BW) of 392.5 ± 47.15 kg. The animals were maintained in a feedlot with individual pens and fed with the same diet for 83 days. The animals were fed ad libitum and the diet was composed of sorghum silage, sugarcane bagasse and concentrate, in relation 33:67 (V: C) in dry matter. The animals were weight at the beginning of the trial and every 28 days after the solid feed restriction. The refused and offered fed were weight to measure the daily feed intake. RFI was calculate by difference between the observed intake and estimated intake what was obtained through a multiple regression equation of feed intake, average daily gain (ADG) and metabolic body weight (MBW) of the animals. On eighth week was realized a digestibility assay. To estimate the fecal production was used indigestible neutral detergent fiber (NDFi) as internal marker. The randomized design was used for statistical analysis. The ADG and BC were the same for different RFI groups (P>0.05), despite of low RFI animals showed lower feed intake (P<0.05) than medium and high RFI. However, the digestibility coefficient did not differ between the RFI groups (P>0.05). In contrast, the apparent digestibility of NFC was negative correlated (– 0,23) with the RFI.
Tendo em vista o potencial de utilização do consumo alimentar residual como ferramenta para seleção genética torna-se imprescindível estudos que procuram entender as variáveis que influenciam o CAR, principalmente dados com bovinos da raça Nelore condizentes com a realidade brasileira. O objetivo deste estudo foi avaliar a digestibilidade aparente da dieta de touros da raça Nelore classificados pelo consumo alimentar residual (CAR). Foram utilizados 120 touros da raça Nelore, com peso corporal (PC) de 392,5 ± 47,15 kg. Os animais foram mantidos em confinamento com baias individuais e alimentados com a mesma dieta por 83 dias. Todos os animais foram alimentados à vontade e a dieta era composta de silagem de sorgo, bagaço de cana e concentrado, na relação 33: 67 (V: C) na matéria seca. Os animais foram pesados no inicio do experimento e a cada 28 dias após jejum de sólido. Diariamente foram pesadas as sobras e o fornecido para determinar o consumo diário. O CAR foi calculado pela diferença do consumo observado e estimado, o qual foi obtido por uma equação de regressão entre consumo, o ganho de peso diário e peso corporal médio metabólico dos animais. Na 8ª semana do experimento foi realizado ensaio de digestibilidade. O marcador interno utilizado para estimar a produção fecal foi a fibra em detergente neutro indigestível (FDNi). Para as análises estatísticas, foi utilizado delineamento inteiramente casualizado. O ganho médio de peso diário (GMD) e PC foram os mesmos para as classes de CAR (P>0,05), apesar dos animais de baixo CAR apresentar menor ingestão de nutrientes (P<0,05) que os animais de médio e alto CAR. Entretanto, os coeficientes de digestibilidade não diferiram entre os grupos (P>0,05). Em contraste, a digestibilidade aparente dos CNF apresentou correlação negativa de -0,23 com o CAR.
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Adesola, Abidemi Adejoke. "Apparent digestibility coefficients of feed ingredients and essential amino acid requirements of dusky kob (Argyrosomus japonicus)." Thesis, Rhodes University, 2017. http://hdl.handle.net/10962/32140.
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Important to the evaluation of potential feed ingredients for inclusion in fish diets should be their digestibility and amino acid requirement so that feeds can be formulated on a digestible basis rather than a gross nutrient basis. This thesis established techniques for faecal collection, the validity of digestibility markers, it determined apparent digestibility coefficients for various novel feed ingredients, and it established the optimal lysine requirement for Argyrosomus japonicus, which was used to estimate each of the essential amino acid requirements by using the ideal protein concept. There were no significant differences in dry matter apparent digestibility coefficients when faeces were collected by stripping (77.0 %), dissection (80.1 %) or settlement (83.5 %). Faecal collection by the settlement method produced the most reliable digestibility data. Apparent digestibility coefficients for dry matter, crude protein and energy calculated using acid-insoluble ash were higher (84.0 %, 93.2 % and 93.0 %, respectively) than those using chromic oxide (55.7 %, 79.1 % and 78.2 %) and titanium dioxide (58.6 %, 79.7 % and 80.5 %). The magnitude of variation in digestibility coefficients obtained using acid-insoluble ash was always lower than that obtained with the other markers. Therefore, acid-insoluble ash was preferred as a dietary marker. Using the above protocol, protein and amino acid digestibility of some animal and plant protein ingredients were evaluated in a series of experiments. The first trial compared the apparent digestibility coefficients of some animal products included as single protein source in the test diets. Apparent protein digestibility values were 84.5 %, 83.8 %, 85.8 % and 83.1 % for fishmeal-prime, fishmeal-standard, poultry meal and pork meal, respectively. Apparent digestibility coefficients for poultry meal were comparable to those of fishmeal, which indicate its potential as a substitute for fishmeal in the diets of A. japonicus. The second trial determined the apparent coefficients of plant and animal protein sources included at 30 % into a practical reference diet (70 %). Apparent protein digestibility ranged from 92.4 % in sunflower meal to 85.5 % in corn gluten meal. Soybean meal is a promising feed ingredient in A. japonicus due to the high apparent digestibility of its protein (92.0 %) and essential amino acid digestibility (mean average 91.4 %). A fundamental assumption in fish feed formulation is that the digestibility of nutrients is additive, i.e., digestibility of a nutrient in one ingredient does not interact with the digestibility of the same nutrient in another ingredient. In the third trial, additivity of feed ingredients was tested using pork meal and poultry meal. The results indicate that the apparent digestibility coefficient of animal protein ingredients could be calculated from compound diets to accurately determine protein and amino acid digestibility in A. japonicus, and possibly other carnivorous fish species. Dietary essential amino acid requirements were determined for juvenile A. japonicus in two trials. A dose-response study was conducted using crystalline lysine to determine the optimal requirement of dietary lysine for A. japonicus. Optimal dietary lysine was estimated at 31.7 g kg-¹ dry diet, corresponding to 73.5 g kg-¹ of dietary protein, based on specific growth rate and broken-line segmented regression analyses. Dietary requirements for other essential amino acids ranged from 22 g kg-¹ (histidine) to 71 g kg-¹ (leucine) crude protein. The results of the present study provided a research tool that could be used to assess and verify the conclusions of earlier dietary work on A. japonicus and in further studies to develop least cost diet formulations for this species. The study also adds to the knowledge of the nutritional requirements of A. japonicus by providing information on the digestibility of plants and animal protein ingredients. It also contributes to future dietary research for this species because this study determines, for the first time, the most suitable methods for investigating the digestibility of raw materials for A. japonicus.
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Vela, Connie Gallardo. "Balanço de nutrientes, uso aparente da energia e digestibilidade ileal aparente e estandardizada dos aminoácidos do farelo do trigo, farelo de arroz, sorgo, farelo de canola, farelo de girassol, milho, farelo de soja e soja integral extrusada, com inclusão isolada e combinada de multi-carboidrase e fitase, em frangos de corte dos 14 aos 21 dias de idade." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/10/10135/tde-20022017-084441/.
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O objetivo do presente estudo foi determinar, em presença de multi-carboidrase (MC: galactomananase, xilanase, beta-glucanase, e alfa-galactosidase) e fitase (10.000 FTU/g) o balanço nutricional, uso aparente da energia (EMA), a digestibilidade ileal aparente e estandardizada dos aminoácidos em diferentes ingredientes usados na alimentação de frangos de corte. Sob o delineamento inteiramente casualizado 1960 frangos machos (Cobb 500) foram distribuídos do 1 aos 21 dias de idade para receberem cinco tratamentos, em sete repetições com sete aves cada. A adaptação das aves às gaiolas, sob níveis nutricionais dietéticos recomendados à fase, se deu do 1º ao 10º dia de idade. A seguir, receberam as dietas experimentais dos 11 aos 18 dias, quando se procedeu a coleta de excretas, período esse, definido como Ensaio 1. A partir do 19º dia as aves receberam nova dieta até os 21 dias de idade, quando se deu o abate para amostragens do conteúdo ileal, período definido como Ensaio 2. As dietas do período experimental foram: dieta de referência e quatro dietas a base de milho (Ensaio 1) e quatro dietas a base de amido de milho (Ensaio 2). As dietas experimentais tinham como única fonte de proteína 30% do ingrediente testado, sendo fornecidas sob arranjo fatorial 2 MC (0 ou 200 mg/kg) x 2 fitase (0 ou 50 mg/kg). Os ingredientes testados foram: farelo de trigo, farelo de arroz, sorgo, farelo de canola, farelo de girassol, milho, farelo de soja e soja integral extrusada. Os dados foram submetidos à análise de variância utilizando o PROC GLM do SAS 9.2. As enzimas melhoraram (P < 0,05) o balanço de nutrientes, a EMA, digestibilidade ileal aparente e estandardizada dos aminoácidos nos diferentes ingredientes testados. Separada ou combinada a multi-carboidrase e fitase tiveram eficiência diferenciada para cada ingrediente estudado e utilizado na formulação das rações de frangos de corte na fase inicial, correspondente ao período de 14 aos 21 dias de idadeThe aim of this study was to determine the effects of multi-carbohydrase (MC, that consist in: galactomannanase, xylanase, beta-glucanase and alpha-galactosidase) and phytase (10000 FTU/g of activity) the nutrients balance, apparent energy use (AME), apparent and standardized ileal amino acids digestibility in some feedstuffs fed to young chickens. Under a completely randomized design 1960 male broilers (Cobb 500) were allotted from 1 to 21 days old to receive five treatments in seven replicates with seven birds each. Birds cages adaptation under dietary nutritional levels recommended to the stage occurred from the 1st to 10th day of age. Then, the birds received the experimental diet from 11 to 18 days when was realized the excreta collection, period defined as Assay 1. From the 19th day the birds received the new diet until 21 days old when birds were slaughter for ileal digesta collection, this period was defined like Assay 2. The experimental diets were: one reference diet and four corn-based diets (Assay 1) and four corn-starch-based diets (Assay 2). The experimental diets containing 30% of ingredient test as a sole protein source in 2 MC (0 or 200 mg/kg) x 2 phytase (0 or 50 mg/kg) factorial arrangement. The ingredients tested were: wheat bran, rice bran, sorghum, canola meal, sunflower meal, corn, soybean meal and extruded soybean meal. Data were subjected to variance analysis using the PROC GLM of SAS 9.2. Enzymes improved (P < 0.05) the nutrients balance, AME use, apparent and standardized ileal amino acids digestibility on different tested ingredients. Isolated or combined the multi-carbohydrase and phytase have different efficiency for each studied ingredient and used on feed formulation for broiler chickens in initial phase, that corresponding from 14 to 21 days old
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Schneiders, José Luiz. "Valores energéticos de alimentos determinados com aves em diferentes idades." Universidade Estadual do Oeste do Paraná, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1648.
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Previous issue date: 2012-06-22Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Aimed to determine the energy values and the coefficients of different foods with broilers at different ages, two experiments were conducted: A digestibility and a performance trial. In the digestibility experiment the foods used were corn, soybean meal, soybean processed by steam heated, meat and bone meal, poultry by-produtct, fish meal, wheat bran, crude soybean oil and poultry fat. It was using the method of total excreta collection, with five trials, divided into five age groups (1-8, 11-18, 21-28, 31-38 and 41-48 days old). Were used 675, 450, 225, 180 and 180 broilers, respectively, in a completely randomized design with nine treatments and four replicates, totaling 36 experimental units. The second experiment evaluated the performance of broilers and the carcass yield using diets with the metabolizable energy values of corn, soybean meal and soybean oil obtained on the digestibility experiment at different ages. The animals were divided into stages 1-7, 8-21, 22-42 and 43-49 days of age. Four experiments were conducted, divided in phases according to ages: pre-starter, starter, grower and finish, were used, respectively 924, 924, 840 and 672 birds randomly distributed in 42 experimental units in a completely randomized design with seven treatments and six repetitions. At 42 and 49 days old two birds per pen were slaughtered to determine carcass yield, cuts and abdominal fat. Among the plant foods studied, the lower coefficients of apparent digestibility were obtained with wheat bran. Among the animal foods, the meat and bone meal had lower CMA and CMAn. Were adjusted to the LRP model the equations to the CMA of corn, soybean meal and soybean processed by steam heated. Other foods (except meat and bones meal) fitted to the linear regression model. The equations show that the digestibility of energy tends to increase with age, with the exception for soybean meal, which had higher digestibility with young birds. It follows that the age of the birds influences in the determinate of metabolizable energy value of foods. As a result of performance in the pre-starter and finishing just the feed conversion was significant. Already in starter and growth, there was significant difference in feed conversion and daily and medium weight gain. In slaughter at 42 days old, only the percentage of abdominal fat was significant
Com o objetivo de determinar os valores e os coeficientes energéticos de diferentes alimentos com frangos de corte em diferentes idades, foram realizados dois experimentos, sendo um ensaio de digestibilidade e outro de desempenho. No experimento de digestibilidade os alimentos avaliados foram o milho, farelo de soja, soja integral desativada, farinha de carne e ossos, farinha de vísceras de aves, farinha de resíduo de filetagem de tilápia, farelo de trigo, óleo de soja degomado e gordura de aves. Foi utilizado o método de coleta total de excretas realizando-se cinco ensaios, de acordo com as idades (1-8, 11-18, 21-28, 31-38 e 41-48 dias). Utilizando-se 675, 450, 225, 180 e 180 frangos de corte respectivamente em cada ensaio. O delineamento foi o inteiramente casualizado com nove tratamentos e quatro repetições totalizando em 36 unidades experimentais. O segundo experimento avaliou o desempenho de frangos de corte e rendimento de carcaça utilizando rações formuladas com diferentes valores de energia metabolizável do milho, farelo de soja e óleo de soja obtidos no experimento de digestibilidade nas diferentes idades. Foram realizados quatro ensaios, em fases de acordo com as idades: pré-inicial (1-7), inicial (8-21), crescimento (22-42) e terminação (43 a 49 dias de idade), onde foram utilizadas, respectivamente 924, 924, 840 e 672 aves distribuídas aleatoriamente em 42 unidades experimentais em um delineamento inteiramente casualizado, com seis tratamentos e sete repetições. Aos 42 e 49 dias de idade, duas aves por unidade experimental foram abatidas para determinação do rendimento de carcaça, rendimento de cortes e porcentagem de gordura abdominal. Entre os alimentos de origem vegetal estudados, os menores CMA e CMAn foram obtidos com o farelo de trigo. Entre os alimentos de origem animal, a farinha de carne e ossos apresentou menores CMA e CMAn da energia bruta. Houve ajuste das equações ao modelo LRP para o CMA do milho, farelo de soja e soja integral desativada. Demais alimentos (com exceção da farinha de carne e ossos) se ajustaram ao modelo de regressão linear. As equações demonstram que a digestibilidade da energia tende a aumentar com a idade, com exceção do farelo de soja, que teve maior digestibilidade com aves mais jovens. Conclui-se que a idade das aves influencia na determinação dos valores de energia metabolizável dos alimentos. Como resultados de desempenho, na fase pré-inicial e terminação somente a conversão alimentar foi significativa. Já nas fases inicial e crescimento, houve diferença significativa na conversão alimentar e ganho de peso médio e diário, sendo que as rações com maior inclusão do óleo de soja apresentaram melhor conversão alimentar e ganho de peso. Somente no abate aos 42 dias de idade a porcentagem de gordura abdominal foi significativa na ração que tinha maior inclusão do óleo de soja