Dissertations / Theses on the topic 'Diets based on corn or sorghum'

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Os objetivos do presente trabalho foram analisar o desempenho zootécnico e caracterizar grupos bacterianos específicos presentes na mucosa de cada segmento do intestino delgado de frangos de corte (1 – 42 dias de idade) quando submetidos a dietas tendo como base o milho ou o sorgo. Foi realizado um ensaio, onde analisou-se o desempenho zootécnico e as características de carcaça dos frangos, e a colonização bacteriana da mucosa do duodeno, jejuno e íleo das aves por Enterobacteriaceae, Enterococcus e Lactobacillus, através de PCR quantitativo em tempo real (qPCR). O ensaio de quantificação absoluta foi realizado com primers específicos da região 16S rDNA para os grupos de interesse, e com um primer universal para estimar o número total de cópias bacterianas. Os dados foram coletados ao nascimento, 7, 21 e 42 dias de idade. Concluiu-se que o sorgo piora a conversão alimentar no período de 1 – 42 dias de idade, diminui o peso vivo aos 42 dias e aumenta o rendimento de carcaça das aves. Ao nascimento foram encontrados Enterobacteriaceae e Enterococcus; ao longo do ciclo de criação, o grupo Enterobacteriaceae se mantém em pequenas taxas, os Enterococcus aparecem aos 7 dias, mas não em idades mais avançadas e os Lactobacillus se tornam majoritários a partir da primeira semana de vida até o final do ciclo. O uso do sorgo determinou: maior número de cópias bacterianas totais no duodeno e jejuno, e Lactobacillus no duodeno em todas as idades; Enterococcus no jejuno aos 7 dias e Enterobacteriaceae no íleo aos 42 dias
The objective of this study was to analyze the performance and characterize specific bacterial groups present in the mucosa of the small intestine segments of broilers (1 – 42 days of age) fed diets based on corn or sorghum. This study was carried out to analyze performance, carcass characteristics, and bacterial colonization of duodenum, jejunum and ileum mucosa of broiler chickens by Enterobacteriaceae, Enterococcus and Lactobacillus, through real-time quantitative PCR (qPCR). The absolute quantification assay was performed with 16S rDNA specific primers for the interest groups, and with one universal primer to estimate the total number of bacterial copies. Data were collected at birth, 7, 21 and 42 days of age. The findings of this study revealed that when sorghum was used, feed conversion was worse in the rearing period, body weight decreased and the carcass yield increased at 42 days of age. At birth, Enterococcus and Enterobacteriaceae were found; along the rearing period, the group Enterobacteriaceae remains in small quantities, Enterococcus was seen only at 7-days of age, and Lactobacillus become majority from the first week until the end of rearing period. The use of sorghum determined: a high number bacterial copies in the duodenum and jejunum, and Lactobacillus in the duodenum at all ages; Enterococcus at 7 days and Enterobacteriaceae at 42 days of age

Orientador: Marcos Macari
Banca: Renato Luis Furlan
Banca: José Fernando Machado Menten
Resumo: Os objetivos do presente trabalho foram analisar o desempenho zootécnico e caracterizar grupos bacterianos específicos presentes na mucosa de cada segmento do intestino delgado de frangos de corte (1 - 42 dias de idade) quando submetidos a dietas tendo como base o milho ou o sorgo. Foi realizado um ensaio, onde analisou-se o desempenho zootécnico e as características de carcaça dos frangos, e a colonização bacteriana da mucosa do duodeno, jejuno e íleo das aves por Enterobacteriaceae, Enterococcus e Lactobacillus, através de PCR quantitativo em tempo real (qPCR). O ensaio de quantificação absoluta foi realizado com primers específicos da região 16S rDNA para os grupos de interesse, e com um primer universal para estimar o número total de cópias bacterianas. Os dados foram coletados ao nascimento, 7, 21 e 42 dias de idade. Concluiu-se que o sorgo piora a conversão alimentar no período de 1 - 42 dias de idade, diminui o peso vivo aos 42 dias e aumenta o rendimento de carcaça das aves. Ao nascimento foram encontrados Enterobacteriaceae e Enterococcus; ao longo do ciclo de criação, o grupo Enterobacteriaceae se mantém em pequenas taxas, os Enterococcus aparecem aos 7 dias, mas não em idades mais avançadas e os Lactobacillus se tornam majoritários a partir da primeira semana de vida até o final do ciclo. O uso do sorgo determinou: maior número de cópias bacterianas totais no duodeno e jejuno, e Lactobacillus no duodeno em todas as idades; Enterococcus no jejuno aos 7 dias e Enterobacteriaceae no íleo aos 42 dias
Abstract: The objective of this study was to analyze the performance and characterize specific bacterial groups present in the mucosa of the small intestine segments of broilers (1 - 42 days of age) fed diets based on corn or sorghum. This study was carried out to analyze performance, carcass characteristics, and bacterial colonization of duodenum, jejunum and ileum mucosa of broiler chickens by Enterobacteriaceae, Enterococcus and Lactobacillus, through real-time quantitative PCR (qPCR). The absolute quantification assay was performed with 16S rDNA specific primers for the interest groups, and with one universal primer to estimate the total number of bacterial copies. Data were collected at birth, 7, 21 and 42 days of age. The findings of this study revealed that when sorghum was used, feed conversion was worse in the rearing period, body weight decreased and the carcass yield increased at 42 days of age. At birth, Enterococcus and Enterobacteriaceae were found; along the rearing period, the group Enterobacteriaceae remains in small quantities, Enterococcus was seen only at 7-days of age, and Lactobacillus become majority from the first week until the end of rearing period. The use of sorghum determined: a high number bacterial copies in the duodenum and jejunum, and Lactobacillus in the duodenum at all ages; Enterococcus at 7 days and Enterobacteriaceae at 42 days of age
Mestre

FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ
O ensaio foi realizado no Setor de Suinocultura do Centro de CiÃncias AgrÃrias do Departamento de Zootecnia da Universidade Federal do CearÃ, com o objetivo de avaliar o desempenho zootÃcnico, os indicadores do metabolismo do nitrogÃnio, o bem-estar animal e o custo de produÃÃo de leitÃes no prÃodo de creche, submetidos a dietas à base de sorgo-soja enriquecidas com caseÃna + lactose isoladas. O experimento teve a duraÃÃo de 42 dias, sendo dividido em duas fases experimentais, a saber: fase 1(21-42 dias) e fase 2 (42 a 63 dias). Foram utilizados 40 animais de linhagem comercial, desmamados com idade aproximada de 21 dias, apresentando um peso mÃdio de 4,76kg. O delineamento experimental utilizado foi em blocos ao acaso, com 4 tratamentos e 5 repetiÃÃes, apresentando 2 animais por repetiÃÃo. Foi realizado um desdobramento fatorial 2X2, sendo 2 cereais energÃticos (milho e sorgo) e 2 suplementos lÃcteos (leite desnatado em pà e caseÃna + lactose). A comparaÃÃo entre as mÃdias foi realizada pelo teste de Duncan a 5%. As dietas experimentais foram isoenergÃticas, isoprotÃicas e isonutrientes para lisina e met+cis. Na fase 1 foi utilizado 21 % de PB e 3350 kcal de EM ⁄ kg. e na fase 2, 18,5 % de PB e 3250kcal de EM ⁄ kg. As dietas experimentais foram em nÃmero de 4 por fase, da seguinte forma: T1 (milho +LDP), T2 (milho+caseÃna +lactose), T3 (sorgo+LDP) e T4 (sorgo+caseÃna+lactose). Foi concluÃdo que a substituiÃÃo do milho pelo sorgo granÃfero e a inclusÃo da lactose + caseÃna à viÃvel quanto ao desempenho zootÃcnico. A utilizaÃÃo do sorgo e da caseÃna+lactose nas dietas para leitÃes desmamados nÃo ocasionou diferenÃas significativas para os indicadores do metabolismo do nitrogÃnio nas duas fases experimentais. Os tratamentos nÃo influenciaram os indicadores do bem-estar animal. NÃo foram registradas interaÃÃes significativas (P>0,05) entre os alimentos energÃticos e os alimentos lÃcteos, nas fases 1 e 2 do perÃodo de creche, para o desempenho zootÃcnico e para os indicadores do bem-estar animal. A melhor resposta econÃmica para a produÃÃo de leitÃes no perÃodo de creche foi obtida com a dieta contendo sorgo + caseÃna +lactose (T4).
The research was developed in the Division of Swine Pro duction, Department of Animal Science, Agricultural Science Center, Federal Un iversity of CearÃ, with the objective of evaluating the animal performance, the occurrence diarrhea, the nitrogen metabolism indicators, animal well-being, and the production cost of piglets submitted to diets containing sorghum-soybean me al and isolated casein+lactose. The assay had the duration of 42 days and it was divided in two phases: 1 (21-42 days of age) and 2 (42-63 days of age ) during the nursery period. The experiment used a total of 40 piglets of a commercial line, weaned at 21 days of age (average weight of 4,76 kg). The exper iment followed a randomized blocks design, with 4 treatments, 5 repetitio ns and 2 animals per repetition, unfolded in a factorial 2 x 2 design, comp osed by two energetic feeds (corn and sorghum) and two milk products (dried skim milk a nd casein + lactose). Mean values were compared through the Duncan's tests 5 %. The diets were isoenergetics, isoproteics and isonutritives for lysine and methionine + cystine. In phase 1, a level of 21% crude protein (CP) and 3350 kcal ME was used and in phase 2, a level of 18,5 % crude protein (CP) and 32 50 kcal ME was used. The experimental diets were in number of 4 for phase: T 1 (corn+ dried skim milk), T 2 (corn + casein + lactose), T 3 (sorghum + dried skim milk) and T 4 (sorghum + casein + lactose). The use of sorghum and casein + lactose in weaned pig diets did not cause significant differences for nitrogen met abolism indicators, in both phases of assay. The treatments did not influence the w ell-being indicators. Related to animal performance and well-being no signi ficant interactions were registered (P>0,05) among the factors, during phases 1 a nd 2 of the nursery xxi period. The best economical answer for production of pi glets in the nursery period was obtained with the diet containing sorghum + casein + lactose (T4).

Thesis (M.S.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on January 16, 2008) Includes bibliographical references.

The objective of this study was to determine if increasing the forage level and feeding grain whole as opposed to dry-rolled is a feasible alternative to high energy rations with a similar age at time of slaughter. Steers were fed either twenty or forty percent forage, with whole or dry-rolled corn. There were no differences in fat thickness, longissimus area, KPH, marbling, USDA quality grade, Warner-Bratzler shear force, or cook loss. Cattle fed high forage and whole corn tended to have lower hot carcass weights. Additionally, the forty percent forage treatment tended to have lower USDA yield grades, and had darker colored steak. Also, steaks from the dry-rolled corn treatment had steaks that were redder, and more yellow. Results from this study suggest that increasing forage level, and corn processing might not result in significant differences in carcass characteristics or meat tenderness, but could negatively impact meat color.

Master of Science
Department of Animal Sciences and Industry
Dale A. Blasi
Four pen studies and one digestibility trial were conducted to evaluate the effects of energy level and intake of corn by-product based diets on newly received growing cattle. In Exp.1 there were four diets where one was offered for ad libitum intake and formulated to supply 0.99 Mcal NEg/kg DM (0.99/100) and the other three treatments were fed at 95, 90, and 85% of the ad libitum treatment and to supply 1.10 (1.10/95), 1.21 (1.21/90), and 1.32 Mcal NEg/kg DM (1.32/85), respectively. ADG was unaffected by treatment (P = 0.32). However, G:F increased linearly with increasing energy and decreasing intake level (P < 0.01). In Exp. 2, a digestibility trial was conducted to study diets from Exp. 1. Ruminal propionate linearly increased with increasing dietary energy and decreasing intake (P < 0.01). Total tract DM digestibility increased linearly with increasing energy and decreasing intake (P < 0.01), whereas passage rate decreased (P < 0.01). Experiment 3 validated results from Exp. 1 feeding the 1.10/95 treatment at 2.40% of BW daily and the 1.32/85 treatment at 2.2% of BW daily and studied a DNA-immunostimulant (Zelnate, Bayer Animal Health, Shawnee Mission, KS). Zelnate had no effect on parameters measured. ADG was not different between energy treatments (P = 0.75), but efficiency was greater for the 1.32/85 treatment (P = 0.03). Experiment 4 was designed to observe effects of the 1.32 Mcal NEg/kg DM diet fed at four intake levels of 1.9, 2.2, 2.5, and 2.8 % of BW daily. ADG increased linearly with increasing intake (P < 0.01), however G:F was not affected (P = 0.98). In Exp. 5 a factorial design was employed to evaluate the effects of two by-products; wet corn gluten feed and wet distiller’s grains plus solubles, and two levels of corn processing; whole corn or dry-rolled corn. Final ADG and G:F were not affected by by-product, corn processing, or their interaction (P > 0.30). Additionally, animals and diets from Exp. 1 were used to study effects on antibody production, acute phase protein response, stress, and immunocompetency of healthy and morbid cattle. Diet had no effect on the parameters measured (P > 0.10). A quadratic response to time (P < 0.01) was detected for haptoglobin, titers for bovine viral diarrhea type 1 (BVD-1), and infectious bovine rhinotracheitis (IBR). Haptoglobin was highest on d 14, and close to baseline levels by d 27. Titer levels for BVD-1 and IBR were higher on d 14, and significantly higher on d 27. Titers for bovine viral diarrhea type 2 (BVD- II) responded linearly (P < 0.05) to time with the highest levels on d 27. Haptoglobin was elevated in morbid animals compared to healthy pen mates (P < 0.05). Titer levels for BVD-I and IBR were higher in healthy animals (P < 0.01). Fecal cortisol was higher on arrival than on d 14 (P < 0.05). In summary, high-energy limit-fed diets based on corn by-products do not affect health and are more efficient than when roughage-based growing diets are fed.

Thesis (MScAgric (Animal Sciences))--University of Stellenbosch, 2011.
Includes bibliography.
ENGLISH ABSTRACT: A growth and digestibility trial was conducted comparing the effect of an experimental enzyme at three different inclusions. A negative control containing no enzyme additions and a positive control containing a proven commercial enzyme were compared in a maize-soybean diet noting the performance of broilers and the digestibility of the grower feed. The commercial enzyme was a granular product with a xylanase activity of 38114.29 nkat/g and the second enzyme (ABO374) was a liquid experimental product with a xylanase activity of 1426.86 nkat/ml. Five diets were used i.e. control basal diet without enzyme supplementation (negative control), basal diet supplemented with the commercial enzyme (positive control) and three basal diets supplemented with the test enzyme at various inclusion levels (ABO 50, ABO 100 and ABO 200). The positive control was supplemented with 200 g/ton of the commercial enzyme; ABO 50 was supplemented with ABO374 at an inclusion level of 2671 ml/ton, ABO 100 with 5342 ml/ton and ABO 200 with 10684 ml/ton. Supplementation with the test enzyme (ABO 50) significantly improved BW at 23 days of age by 4.6 % (1107.4 g vs 960.96 g) and at 37 days of age by 3.2 % (2311.75 g vs 2237.81 g) over the negative control. Body weight gain for the total period of the trial was significantly improved by 3.24 % (64.32 g/bird/day vs 62.24 g/bird/day) the test enzyme supplementation (ABO 50) when compared to the negative control. During the starter phase, test enzyme supplementation (ABO 50) led to an improvement of 4.58 % (1.25 vs 1.31) in FCR in comparison with the negative control. The FCR for the total trial obtained by the test enzyme supplementation was significantly lower than the FCR obtained by the positive control. The highest EPER obtained for this trail was by the test enzyme supplemented diets and this was significantly higher than the EPER obtained by the positive control. It is clear from this growth trial that the test enzyme (ABO374) at an inclusion level of 2671 ml/ton outperformed the commercial enzyme and that it has the potential to improve the production performance of broilers on a maizeSBM based diet. The total tract digestibility method and total collection method was used to conduct the digestibility trial. The total tract digestibility method measures the difference between the amounts of each nutrient consumed from the amounts of each nutrient excreted in faeces. Only apparent digestibilities are reported for the digestibility trial. Apparent digestibility does not take the endogenous protein fraction in the faeces into account. The endogenous protein fraction is derived from digestive enzymes and proteins from the intestinal walls that are secreted into the digestive tract. The grower negative control, positive control, ABO 50, ABO 100 and ABO 200 diets used in the production trial were also used in the digestibility trial. Supplementation with the test enzyme showed no significant improvements on the apparent digestibility of dry matter, organic material, ash, crude protein, metabolisable energy or crude fibre. No significant improvements in the apparent digestibility of the amino acids (threonine, arginine, valine, lysine, methionine, cysteine and isoleucine) were noticed either and thus the digestibility of the grower feed were not influenced by the addition of enzymes due to the supplementation of the test enzyme ABO374. Pelletisation of the grower diets could have lead to the inactivation of the enzyme due to the high temperature at which pelletisation takes place. Another possible reason why enzyme supplementation did not increase nutrient digestibility, may be that the breakdown of non-starch polysaccharides by the enzymes led to an increase in the concentration of oligosaccharides in the small intestine of the birds, thus leading to the decrease in nutrient absorption Key words: body weight, body weight gain, feed conversion ratio, European production efficiency ratio, maize, soybean meal, apparent digestibility, dry matter, organic material, ash, crude protein, metabolisable energy, crude fibre, xylanase, pellitisation.
AFRIKAANSE OPSOMMING: ‘n Groei en vertering studie was uitgevoer om die effek van ‘n eksperimentele ensiem wat teen drie verskillende insluitingsvlakke by ‘n basale dieët bygevoeg is te vergelyk met ‘n negatiewe kontrole wat geen ensiem bevat het nie en met ‘n positiewe kontrole wat ‘n kommersiële ensiem bevat in ‘n mielesojaboon oliekoek dieët op die produksie vermoë van braaikuikens en die verteerbaarheid van die groei voer. Die kommersiële ensiem was ‘n granulêre produk met ‘n xylanase aktiwiteit van 38114.29 nkat/g en die eksperimentele ensiem (ABO374) was ‘n vloeistof produk met ‘n xylanase aktiwiteit van 1426.86 nkat/ml. Vyf diëte was gebruik nl. ‘n basale dieët met geen ensiem byvoeging (negatiewe kontrole), basale dieët met die byvoeging van die kommersiële ensiem (positiewe kontrole) en drie basale diëte wat met die byvoeging van die eksperimentele ensiem teen drie verskillende insluitings vlakke (ABO 50, ABO 100 and ABO 200). Die kommersiële ensiem was by die positiewe kontrole bygevoeg met ‘n insluitings vlak van 200 g/ton, ABO374 was bygevoeg by ABO 50 met ‘n insluitings vlak van 2671 ml/ton, ABO 100 met 5342 ml/ton en ABO 200 met 10684 ml/ton. Die byvoeging van die eksperimentele ensiem (ABO 50) het gelei tot die betekenisvolle verbetering van die liggaamsmassa van die voëls by die ouderdom van 23 dae met 4.6 % (1107.4 g teenoor 960.96 g) en by die ouderdom van 37 dae met 3.2 % (2311.75 g teenoor 2237.81 g) teenoor die negatiewe kontrole. Liggaams massa toename vir die hele periode van die studie was betekenisvol verhoog met 3.24 % (64.32 g/kuiken/dag teenoor 62.24 g/kuilen/dag) met die byvoeging van die eksperimentele ensiem (ABO374) teenoor die negatiewe kontrole. Voeromset verhouding was betekenisvol verbeter met 4.58 % (1.25 teenoor 1.31) toe die kommersiële ensiem bygevoeg was teenoor die negatiewe kontrole. Die hoogste europese produksie effektiwiteits verhouding wat verkry is vir die hele studie periode is deur die byvoeging van die eksperimentele ensiem (ABO374). Hierdie groei studie dui dus duidelik aan dat die gebruik van die eksperimentele ensiem (ABO374) baie beter resultate as die kommersiële ensiem opgelewer het teen ‘n insluitings vlak van 2671 ml/ton, dus het ABO374 die potensiaal om die produksie potensiaal van braaikuikens op ‘n mielie-sojaboonoliekoek dieët te verbeter. Die totale spysverteringskanaal verteerbaarheid metode was gebruik om die verteerbaarheid studie uit te voer. Die totale spysverteringskanaal verteerbaarheid metode meet die verskil tussen die nutriënt inhoud van die voer en die nutriënt inhoud van die mis. Slegs die skynbare verteerbaarheid van nutriënte word vir hierdie verteerbaarheidstudie gerapporteer. Skynbare verteerbaarheid sluit nie die endogene proteïenfraksie wat afkomstig is van verteringsensieme of die proteïene afkomstig vanaf die spysverteringskanaal se intestinale wande af in nie. Die negatiewe kontrole, positiewe kontrole, ABO 50, ABO 100 en ABO 200 groei diëte gebruik in die produksie studie is gebruik vir die verteringsstudie. Die byvoeging van die eksperimentele ensiem het geen betekenisvolle resultate opgelewer ten opsigte van droë materiaal, organiese material, as, ru-proteïen, ru-vesel of metaboliseerbare energie nie. Daar was ook geen betekenisvolle resultate opgelewer wanneer die eksperimentele ensiem bygevoeg was nie ten opsigte van die verteerbaarheid vir aminosure (treonien, arginien, valien, metionien, sisteïen en isoleosien) nie en dus is die verteerbaarheid van die groeivoer glad nie beïnvloed deur die byvoeging van die eksperimentele ensiem nie. Die verpilling van die groei voer mag dalk gelei het tot die inaktivering van die eksperimentele ensiem deur dat dit blootgestel was aan hoë temperature. ‘n Ander moontlike rede vir die mislukking van die ensiem kon gewees het dat die afbreking van die nie-stysel polisakkariedes deur die ensiem kon gelei het tot die verhoging van die oligosakkariede konsentrasie in die laer spysverterings kanaal en dus kon dit lei tot ‘n verhoogde deurvloeitempo, gevolg deur ‘n afname in die absorpsie van nutriënte. Sleutel woorde: Liggaamsmassa, liggaamsmassa toename, voeromsetverhouding Europese produksie effektiwiteits verhouding, mielie, sojaboonoliekoek, skynbare verteerbaarheid, droëmaterial, organiesematerial, as, ru-proteïen, ru-vesel, metaboliseerbare energie, verpilling.

Two studies were conducted to determine effect of feeding method and level of corn condensed distillers solubles supplementation on performance of beef cows fed forage-based diets and effects on digestibility and ruminal fermentation. Experiment 1 utilized 80 gestating crossbred cows in a randomized complete block design. Treatments were arranged in a 2 ? 2 + 1 factorial design; main effects were feeding method (mixed vs. fed separately) and level of CCDS. All treatments were offered ad libitum forage. Experiment 2, utilized 5 ruminally and duodenally cannulated Holstein steers in a 5?5 Latin square to evaluate effects of CCDS supplementation on DM intake, site of digestion, and ruminal fermentation. Exp. 2 utilized similar treatments as experiment 1; and all treatments were offered ad libitum forage. Results of these studies suggest that CCDS supplementation increases intake, performance, and CP digestion and appears to be an effective supplement for cattle eating moderate-quality forages.