Log in

Relevant bibliographies by topics / Livestock, animal feeding, dairy cattle / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Livestock, animal feeding, dairy cattle.

Dissertations / Theses on the topic 'Livestock, animal feeding, dairy cattle'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 41 dissertations / theses for your research on the topic 'Livestock, animal feeding, dairy cattle.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Steinhöfel, Olaf, Brigitte Fröhlich, Jürgen Zentek, Anett Kriesten, and Klaus Männer. "Spurenelementversorgung bei Milchrindern." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-119277.

Full text

Abstract:

In den Mischfutterrationen für Milchrinder wurde ein mittlerer Gehalt von Kupfer, Zink, Mangan und Selen ermittelt, der 2,5-fach über der Versorgungsempfehlung liegt. Neben den umweltrelevanten Konflikten dieser Praxis sind auch Versorgungsprobleme bei den Milchrindern aufgrund unerwünschter Interaktionen der Elemente nicht auszuschließen. In elf sächsischen Milchviehbetrieben wurden die Ursachen der Überversorgung untersucht und Vorschläge zur Optimierung der Spurenelementversorgung von Milchrindern erarbeitet. Dabei konnte die mittlere Kupfer-, Zink- und Selenkonzentration in den TMR um im M

APA, Harvard, Vancouver, ISO, and other styles

2

White, Sharon. "Investigation of Pasture and Confinement Dairy Feeding Systems Using Jersey and Holstein Cattle." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000414-220827.

Full text

Abstract:

<p>Today, dairy farmers in the U.S. are faced with the challenge of reducing the cost of producing milk. Milk prices have risen very little in the past decade, while the cost of producing milk has risen steadily. In North Carolina alone, dairy farm numbers have dropped more than 30% in the last ten years, and the trend is expected to continue. Dairy farmers have been forced to increase their profitability to stay in business. In addition, farmers have been forced to comply with stricter environmental regulations. Over the past few years, interest has been shown in intensive management rotation

APA, Harvard, Vancouver, ISO, and other styles

3

Marmolejo, Gonzalez Alonso. "UTILIZATION OF AMMONIATED WHEAT STRAW BY LACTATING DAIRY CATTLE." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275406.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Khalaf, Sadi Shalan. "THE USE OF CALCIUM TREATED ANIMAL FAT IN THE RATION OF DAIRY COWS." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Mullins, Chad Ryan. "Feeding high levels of wet corn gluten feed to dairy cattle." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1640.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Fröberg, Sofie. "Studies on restricted suckling in dual purpose and dairy breed cattle in Mexico /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/9977342.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Kamande, George Matiru. "Forage and concentrate protein utilization by dairy cattle." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27970.

Full text

Abstract:

In the first part of this study, the relative in situ rumen degradabilities of some common Kenyan feedstuffs were estimated using two fistulated steers. The second part of the study attempted to manipulate rumen fermentation processes by heat treating dietary protein, and also by varying the hay particle size. The in situ dacron bag technique was used to estimate the feeding value of some common Kenyan forages. The rate and extent of dry matter (DM) and crude protein (CP) degradation in the rumen was then determined from the incubated samples. Effective DM and CP degradation was also estimate

APA, Harvard, Vancouver, ISO, and other styles

8

Mowrey, Amy. "Feeding supplemental fat to enhance fertility in the dairy cow /." free to MU campus, to others for purchase, 2000. http://wwwlib.umi.com/cr/mo/fullcit?p9998499.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Swanepoel, Nadia. "Estimating amino acid limitations in California dairy rations and the effect of feeding a ruminally protected lysine supplement on animal performance." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-08122009-203115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Swiegers, Johannes Pieter. "The effect of oat silage replacement with wheat straw in dairy cow diets on animal performance, rumen fermentation and adequacy of CPM dairy model predictions." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18096.

Full text

Abstract:

Thesis (PhDAgric (Animal Sciences))--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: A series of experiments were conducted to determine the effect of the replacement of oat silage by wheat straw in low forage diets for high producing dairy cows. In the first trial, 28 multiparous Holsteins were randomly assigned to two dietary treatments, namely silage and straw after completing a covariate period coinciding with the first 40 days of lactation and remained on these diets for the remainder of experimental period from 41 to 252 days. In order to evaluate the effect of substitution duri

APA, Harvard, Vancouver, ISO, and other styles

11

Ramkumar, S. N. "The analysis of farmer information systems for feeding dairy cattle in two villages of Kerala State, India." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240285.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Santschi, Debora. "Fate of B-complex vitamins in the gastrointestinal tract of dairy cows." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81432.

Full text

Abstract:

Three experiments were conducted to characterize the fate of B-vitamins in the gastrointestinal tract of dairy cows. Experiment 1 was undertaken to verify if differences among published studies could be explained by methods of collection and preparation of ruminal fluid, using four ruminally cannulated non-lactating Holstein cows. Acidification of fresh ruminal fluid, causing the lysis of bacterial cells, yielded higher B-vitamin concentrations than differential centrifugation, while the method of collection used did not have an important impact. Results suggested that most of the vitam

APA, Harvard, Vancouver, ISO, and other styles

13

Bunge, Gregory Andrew. "The effect of supplemental biotin in dairy cow diets on forage fermentation characteristics." Thesis, Link to online version, 2006. http://hdl.handle.net/10019/515.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Sullivan, James Lawrence. "Comparison of whole short staple, whole Pima, cracked Pima and ground Pima cottonseed in diets for lactating dairy cows." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185944.

Full text

Abstract:

Two lactation studies with accompanying digestion trials were conducted to compare the feeding value of Pima cottonseed, with differing degrees of processing, to short staple cottonseed for lactating dairy cows. Additional tests were conducted to examine physical and chemical characteristics of both Pima and short staple cottonseed and the effect of processing on storage characteristics of cottonseeds. Pima cottonseed is higher in CP and ether extract and lower in NDF and ADF than short staple seed. Pima seed has a greater bulk density, a greater proportion of the (-)-gossypol isomer and a low

APA, Harvard, Vancouver, ISO, and other styles

15

Vermaak, Jacobus Vermaak. "Die aanwending van die CPM dairy model in formulering van voerrantsoene in 'n melkkudde." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/17253.

Full text

Abstract:

Thesis (MPhil)--Stellenbosch University, 2004.<br>ENGLISH ABSTRACT: CPM Dairy was developed to maintain amino acid balance. because the correct amino acid relationship has an influence on milk production and milk composition (Schwab e/ af. 1992, Rulquin e/ af. 1993). Rulquin e/ af. (1993) found that an increase in lysine and methionine concentration in the diet had no meaningful effect on milk production and milkfat production. However, milk protein production is described as a function of lysine and methionine concentration. In order to balance the amino acid relationships, the CNCPS mo

APA, Harvard, Vancouver, ISO, and other styles

16

Munoz, Vargas Lohendy M. "Impact of Metabolic Stress, Microbiome, and Lymph Node Colonization on Salmonella Shedding in Dairy Cattle." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492625962680584.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Melin, Martin. "Optimising cow traffic in automatic milking systems : with emphasis on feeding patterns, cow welfare and productivity /." Uppsala : Dept. of Animal Nutrition and Management, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200563.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Sadik, Mohamad Shabir 1959. "MICROBIAL PROTEIN FLOW TO THE SMALL INTESTINE OF COWS FED DIFFERENT PROTEIN SUPPLEMENTS." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/292012.

Full text

Abstract:

Three duodenally cannulated lactating Holstein cows fed cotton-seed meal (CSM), corn gluten meal (CGM) or blood meal (BM) as protein supplement were used in a 3 x 3 Latin Square experiment to determine microbial crude protein (MCP) in duodenal digesta. Diets, formulated to contain 15% crude protein (CP) on a dry matter basis, consited of 60% concentrate, 31% corn silage and 9% alfalfa hay. Chromium oxide was employed as flow marker. Microbial protein fraction of digesta CP (MCP/DCP) was estimated by three microbial markers: ¹⁵N, diaminopimelic acid (DAP) and ribonucleic acid (RNA). The isotopi

APA, Harvard, Vancouver, ISO, and other styles

19

Madibela, Othusitse Ricky. "Protein nutrition of livestock grazing high quality pasture." Lincoln University, 2010. http://hdl.handle.net/10182/1571.

Full text

Abstract:

This thesis describes a series of four experiments designed to evaluate the role of the supply of protein in livestock grazing high quality pasture during mating and during pregnancy. The first two studies investigated the effects of high crude protein content of spring or autumn re-growth pasture on the reproductive performance of dairy cows and of ewes at mating. The last two studies investigated how the dietary supply of protein, body condition and their interactions contribute to the breakdown of immunity during the peri-parturient period in ewes and investigated underlying endocrine mecha

APA, Harvard, Vancouver, ISO, and other styles

20

Zerbini, Ercole. "Effects of dietary soybean meal and fish meal on protein digesta flow in Holstein cows during early and midlactation." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/82616.

Full text

Abstract:

Six lactating Holstein cows fitted with rumen cannulae and T-type cannulae in the proximal duodenum were used to measure digesta and nitrogen compounds flow to the small intestine during early and midlactation. Fish meal and soybean meal provided 54 and 56% of the protein in the diets composed of corn grain, corn silage and orchardgrass hay, and which contained 15.4 and 15.5% crude protein and 20.9 and 20.5 acid detergent fiber. Spot samples of digesta were collected from the rumen, duodenum and rectum over a period of 72 hours. Co-EDTA and ytterbium were used as liquid and particulate digesta

APA, Harvard, Vancouver, ISO, and other styles

21

Nel, Magdel. "The effect of fine particle removal on the estimation of protein degradability parameters in diary cattle." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20039.

Full text

Abstract:

Thesis (MScAgric)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Grinding of feedstuffs prior to in sacco incubation results in fine particles that could escape from dacron bags without being degraded. The objective of this study was to determine the effect of the removal of these fine particles on protein degradation parameters. The feedstuffs that were used were protein feedstuffs that are commonly used in dairy cattle diets in South Africa. Feedstuffs were soybean oilcake, sunflower oilcake, maize gluten 20, maize gluten 60 and fish meal. Treatments were; 1. grinding through a 2 mm sc

APA, Harvard, Vancouver, ISO, and other styles

22

Vermaak, Maizie Maria. "Die gebruik van Mamalvite en Flavomisien in die grootmaak van suiwelkalwers." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/3320.

Full text

Abstract:

Thesis (MPhil (Animal Sciences))--University of Stellenbosch, 2006.<br>South Africa produces only 0,50 % of the world’s milk. Although the number of milk producers is decreasing in South Africa, the milk production per se is increasing. The total number of small producers is decreasing while the number of big producers is increasing. The cost to raise replacement heifers is very high. Replacement heifers are the cows of tomorrow and should be seen as a valuable investment for the longterm survival and profitability of the dairy farm. A successful heifer rearing program is one in which: • Hei

APA, Harvard, Vancouver, ISO, and other styles

23

Gwelo, Farai Alice. "Farmers` perceptions of livestock feeding and rangeland management: dynamics of soil, forage and cattle blood serum mineral levels in two communal areas of the Eastern Cape, South Africa." Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/d1006785.

Full text

Abstract:

This study was conducted to determine livestock production, rangeland management and the mineral levels of soils, grass and cattle blood serum in two communal areas (Kwezana and Dikidikana). A total of 77 farmers from both Kwezana and Dikidikana were interviewed to determine farmers’ perceptions. Soil and grass sampling was done at three sites in each communal area. Soil and grass samples were analysed for N, Ca, Mg, K, P, Fe, Cu, Zn, Mn and Bo. Three, two and half year old Nguni heifers were randomly selected from each communal area and blood samples were collected for the analysis of Ca, Mg,

APA, Harvard, Vancouver, ISO, and other styles

24

Kwak, Wansup. "Lactational, metabolic, and physiological effects of dietary fats and isoacids on early lactating first-calf Holstein heifers." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/91104.

Full text

Abstract:

Forty four first-calf heifers were randomly selected to determine lactational and metabolic responses to high fat diets and isoacids. All heifers were allowed ad libitum consumption of a control diet for the first 2 weeks of lactation and then offered experimental diets Eor the next 4 weeks. Each 6 cows of twenty four were randomly assigned to 1) a control diet (C) with 35.2% corn silage, 14.4% alfalfa haylage and 50.4% concentrate (dry matter basis), 2) C with 2% calcium stearate (S) substituted for corn grain, 3) C with 2% tallow (T) for corn grain, and 4) C with 10% whole cottonseed (W) for

APA, Harvard, Vancouver, ISO, and other styles

25

Joubert, Matthys Du Toit. "The effect of concentrate feeding strategies on rumen parameters, milk production and milk composition of Jersey cows grazing ryegrass (Lolium multiflorum) or kikuyu (Pennisetum clandestinum) pasture." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20069.

Full text

Abstract:

Thesis (MScAgric)--Stellenbosch University, 2012<br>ENGLISH ABSTRACT: Ruminal pH is the rumen condition that varies most. Studying the cause and effect of diurnal variation offers a means of improving ruminal conditions for rumen micro-organisms with subsequent improvements in fibre degradation, milk yields and milk composition. A research project was conducted to test the following hypothesis: feeding 6 kg (as is) concentrate per cow/day in different weight ratios, divided in a morning and an afternoon allocation, will result in an improved ruminal pH profile and a concurrent increase in fib

APA, Harvard, Vancouver, ISO, and other styles

26

Santos, Priscila Vincenzi dos. "Sistemas de terminação e pesos de abate de bovinos leiteiros visando à produção de carne de vitelão." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/2798.

Full text

Abstract:

Fundação Araucária; CAPES<br>O trabalho foi desenvolvido na Universidade Tecnológica Federal do Paraná, Câmpus Dois Vizinhos, com o objetivo de avaliar as características e a composição física da carcaça e carne de bezerros holandeses terminados em pastagem com suplementação ou confinamento e abatidos com diferentes pesos. Foram utilizados 43 animais, da raça Holandesa, com peso inicial ao desmame de 57 kg e 58 dias de idade, distribuídos em dois sistemas de terminação e em quatro pesos de abate pré- estipulados: 140; 180; 220 e 260 kg de peso corporal. Vinte e três animais foram confinados em

APA, Harvard, Vancouver, ISO, and other styles

27

Córdova, Helder de Arruda. "Utilização de cevada em substituição ao milho em dietas para vacas holandesas de alta produção." Universidade do Estado de Santa Catarina, 2004. http://tede.udesc.br/handle/handle/958.

Full text

Abstract:

Made available in DSpace on 2016-12-08T16:24:23Z (GMT). No. of bitstreams: 1 PGCV04MA001.pdf: 365827 bytes, checksum: 83549fc5b733303769d0838e07c56a4e (MD5) Previous issue date: 2004-12-17<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In this work the effects of the total and partial substitution of ground corn for dry rolled barley on the production and composition of milk was evaluated. Twenty-eight primiparous and multiparous Holsteins cows were used, with an average of 125 days in milk at the beginning of the experiment. The design of the experiment was a 4x4 latin sq

APA, Harvard, Vancouver, ISO, and other styles

28

GORDO, João Maurício Lucas. "Análise da situação da inseminação artificial bovina no estado de Goiás." Universidade Federal de Goiás, 2011. http://repositorio.bc.ufg.br/tede/handle/tde/1137.

Full text

Abstract:

Made available in DSpace on 2014-07-29T15:13:45Z (GMT). No. of bitstreams: 1 Tese Joao Mauricio Lucas Gordo.pdf: 989990 bytes, checksum: d42049f86155b876ca6f5dcc3bfbe6f3 (MD5) Previous issue date: 2011-08-05<br>This study aimed to diagnose the situation and use of artificial insemination (AI) and fixed-time artificial insemination in Goiás State, Brazil. A literature review was carried out and economic costs related to herd conception in natural mating systems, AI and TAI were calculated. Subsequently, an approach to cattle farmer´s profile, farm characterization and speech analysis was fulf

APA, Harvard, Vancouver, ISO, and other styles

29

Ferreira, Lucas Silveira. "Silagem de colostro: caracterização do perfil de fermentação anaeróbia e desempenho de bezerros leiteiros." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-19102011-142638/.

Full text

Abstract:

O objetivo deste estudo foi caracterizar o perfil de fermentação anaeróbia de colostro e determinar seu valor nutritivo, assim como avaliar o desempenho de bezerros leiteiros alimentados com silagem de colostro como dieta líquida. No primeiro experimento, colostro bovino de segunda e terceira ordenhas foi fermentado em garrafas plásticas tipo PET que foram cheias e ligeiramente pressionadas antes do seu fechamento, criando assim uma condição anaeróbia. As garrafas foram armazenadas em sala escura à temperatura ambiente e cinco garrafas foram abertas 0,1, 2, 3, 4, 5, 6, 7, 14, 21, 28 e 56 dias

APA, Harvard, Vancouver, ISO, and other styles

30

Vito, Elias San. "Glicerina bruta na alimentação de vacas leiteiras." Universidade Federal de Viçosa, 2010. http://locus.ufv.br/handle/123456789/5658.

Full text

Abstract:

Made available in DSpace on 2015-03-26T13:54:58Z (GMT). No. of bitstreams: 1 texto completo.pdf: 265756 bytes, checksum: 80ffa15cac535d3ac19348bd61cb2ef3 (MD5) Previous issue date: 2010-07-08<br>The growth in the share of biodiesel in the world energy grid has increased the interest in the cultivation and processing of oil, creating opportunities for the production of ruminant by the possibility of using co-products resulting from the extraction of oil from these oil seeds and oil processing into biodiesel. Glycerin is a triol viscous, colorless, odorless and hygroscopic resulting, among oth

APA, Harvard, Vancouver, ISO, and other styles

31

Adeleke, Rasaq Ademola. "Effects of Brevibacillus laterosporus and live yeast on rumen fermentation, nutrient digestibility and microbial protein synthesis." Diss., 2016. http://hdl.handle.net/10500/23002.

Full text

Abstract:

This study investigated the effects of Brevibacillus laterosporus and live yeast (LY) on rumen fermentation, nutrient digestibility and microbial protein synthesis. The basal diet was a total mixed ration formulated to fulfil the minimum nutrient requirement of early lactating 600 kg Holstein cow producing 40kg of milk with 3.5 % fat and 3.3 % protein using CPM-dairy software (NRC, 2001). Treatments were: T1 (Control: basal diet with no additive), T2 (Basal diet + Brevibacillus laterosporus), T3 (Basal diet + Live yeast), and T4 (Basal diet + Brevibacillus laterosporus + Live yeast). In situ

APA, Harvard, Vancouver, ISO, and other styles

32

Evers, Dale J. "Transforming shrimp and crab waste into dairy heifer feed." Thesis, 1994. http://hdl.handle.net/1957/35279.

Full text

Abstract:

The goal of these experiments was to ensile combinations of shrimp or crab waste with perennial ryegrass straw and analyze it for silage quality and ruminal degradability. The rapid deterioration of seafood wastes required initial preservation prior to ensiling to minimize odor production and protein breakdown. Eight experiments were conducted to preserve, ensile and test the ruminal degradability of shrimp and crab waste. The first three experiments attempted to preserve crab waste with the addition of 0 to 15% molasses for 14 days or shrimp waste with molasses at 0 to 25% for 6 or 21 days. I

APA, Harvard, Vancouver, ISO, and other styles

33

Agboola, Olabisi Dorcas. "Degradation kinetics of carbohydrate fraction of commercial concentrate feeds for weaned calves, heifers, lactating and dry dairy cattle." Diss., 2015. http://hdl.handle.net/10500/19565.

Full text

Abstract:

Variations in composition and disappearance of nutrients in dairy cattle feeds are dictated by ingredients, methods of processing, storage while milk production levels depend on the animal, environmental factors and largely on pools of available carbohydrates, proteins, vitamins and minerals in the concentrate feeds. There is a wide variety of concentrates for dairy cattle on the formal and informal markets and dairy farmers need to be astute in selecting feeds appropriate for specific production periods and animals to sustain their businesses. Composition of nutrients displayed on concentrate

APA, Harvard, Vancouver, ISO, and other styles

34

Dorcas, Agboola Olabisi. "Degradation kinetics of carbohydrate fraction of commercial concentrate feeds for weaned calves, heifers, lactating and dry dairy cattle." Diss., 2015. http://hdl.handle.net/10500/19565.

Full text

Abstract:

Degradation kinetics of carbohydrate fraction of commercial concentrate feeds for weaned calves, heifers, lactating and dry dairy cattle<br>Variations in composition and disappearance of nutrients in dairy cattle feeds are dictated by ingredients, methods of processing, storage while milk production levels depend on the animal, environmental factors and largely on pools of available carbohydrates, proteins, vitamins and minerals in the concentrate feeds. There is a wide variety of concentrates for dairy cattle on the formal and informal markets and dairy farmers need to be astute in selecting

APA, Harvard, Vancouver, ISO, and other styles

35

Horne, Tim. "Performance of Hereford and Holstein heifers on kikuyu pasture (Pennisetum clandestinum), using n-alkanes for determination of digestibility and dry matter intake." Thesis, 1995. http://hdl.handle.net/10413/8981.

Full text

Abstract:

Kikuyu pasture (Pennisetum clandestinum) is potentially the most important source of roughage used to feed dairy heifers in summer in KwaZulu-Natal. It is commonly believed that on kikuyu pasture beef breed females grow at a faster rate than those from dairy breeds when no supplementation is given. Little conclusive evidence is, however, available to support this. Explanations as to why such differences may exist are also limited. Eight Hereford and eight Holstein heifers of similar age and maturity stage were used in a trial. The trial was run over a twenty week period. For the first te

APA, Harvard, Vancouver, ISO, and other styles

36

Jacinto, Diana Margarida. "Bem-estar animal em explorações leiteiras : percepção dos produtores vs realidade." Master's thesis, 2011. http://hdl.handle.net/10437/1587.

Full text

Abstract:

Orientação: João Cannas da Silva ; co-orientação: Maria do Carmo Feliciano<br>Melhorar o bem-estar animal (BEA) em explorações leiteiras passa por melhorar a percepção que os produtores/tratadores têm dos problemas existentes nas suas explorações. Se um produtor/tratador não se apercebe de uma situação de risco para o BEA, a probabilidade de providenciar tratamentos ou planear planos de prevenção será menor. Com este trabalho pretende-se investigar a percepção que os produtores/tratadores de 9 explorações leiteiras, com sistemas de produção intensiva em estabulação livre com cubículos, poss

APA, Harvard, Vancouver, ISO, and other styles

37

Holliday, Jane. "Management of kikuyu (Pennisetum clandestinum) for improved dairy production." Thesis, 2007. http://hdl.handle.net/10413/5512.

Full text

Abstract:

South African dairy farmers have generally used kikuyu pasture to tide them over from one ryegrass season to the next, and as a result of its resilient nature, have assumed careful management of it to be unnecessary. This has resulted in its mismanagement which is unaffordable in current times where the profitability of dairy farming is increasingly dependent on low input, pasture-based systems. Kikuyu pasture may play a larger role in supplying nutrients to dairy cattle over the summer months in future as the alternative home produced feed sources such as silage and perennial ryegrass become

APA, Harvard, Vancouver, ISO, and other styles

38

Tesfayohannes, Simon Tesfaldet. "Effect of urea-ammoniation of dietary roughage and concentrate ratio on ruminal microbial activity in Jersey cows." Thesis, 2003. http://hdl.handle.net/10413/6257.

Full text

Abstract:

The effect of untreated roughages on digestibility and rumen fill of the gut was reviewed as physical mechanism influencing the regulation of roughage intake. The review of literature also focused on identifying factors that affect the way in which urea-ammoniation alters the roughage intake, digestibility and performance of ruminant animals. Trials were carried out with fistulated cows to address to what extent concentrate proportion and urea-ammoniation affected microbial colonization and degradation of roughage diets in the rumen. One interest of this study was to develop a model that would

APA, Harvard, Vancouver, ISO, and other styles

39

Short, Alan Douglas. "Rangeland and animal performance trends in highland sourveld." Thesis, 2010. http://hdl.handle.net/10413/8314.

Full text

Abstract:

Long-term trends in rangeland sward dynamics (species composition, structure, productivity) were examined on three trials established between 1989 and 1996 at Kokstad Research Station in the Highland Sourveld, while animal performance (average daily gain and gain per hectare) was examined on two of the trials. The region enjoys moderate rainfall of 782mm per annum, with hilly topography, and soil depths ranging from >1m to <20cm. The first trial was labelled the simulation trial, as it simulated a four-paddock rotational grazing system, in which animals spent two weeks in each of three paddock

APA, Harvard, Vancouver, ISO, and other styles

40

Antunes, Rui Filipe da Conceição Santos. "Relação entre a introdução de um programa de maneio de colostro e a saúde de vitelos numa exploração leiteira." Master's thesis, 2016. http://hdl.handle.net/10437/7636.

Full text

Abstract:

Orientação : Ângela Dâmaso ; co-orientação : Carlos Silva<br>A saúde dos vitelos é um fator de elevada importância na economia de uma exploração leiteira. Devido à natureza da placenta bovina, os vitelos nascem sem imunidade, e necessitam de ingerir imunoglobulinas nas primeiras 4 horas de vida, de forma a dar-se a absorção das mesmas a nível intestinal e a obterem imunidade passiva contra os agentes patogénicos do ambiente. A incidência de doença e morte nos vitelos, está por isso fortemente relacionada com o maneio do colostro e com as condições ambientais às quais os vitelos estão expostos.

APA, Harvard, Vancouver, ISO, and other styles

41

Chaves, Alexandre Vieira. "Digestion characteristics of forages, including perennial ryegrass at different stages of maturity, and supplementary feeding for dairy cows grazing pasture : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Animal Science, Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand." 2003. http://hdl.handle.net/10179/1160.

Full text

Abstract:

This thesis defines digestion kinetics for perennial ryegrass (Lolium perenne L.), which is the main component of diets fed to dairy cows in New Zealand. Chemical composition and digestion kinetics were measured in fresh minced ryegrass as it matured and leaf, stem and inflorescence of several grass species. In sacco and in vitro incubations were used to define rates of degradation and nutrient release. Two short-term grazing trials were used to evaluate contrasting silages as supplements for cows fed restricted amounts of summer pasture. The minced preparation of ryegrass resulted in a simila

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!