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| Registros recuperados: 717 | |
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| Laws, J.A.; Williams, Robert J.; Pain, B.F.. |
| The financial implications of manipulating nitrogen (N) inputs and management strategies for beef production systems were assessed. One-hectare grassland farmlets were grazed to a target sward height by beef steers; herbage surplus to grazing requirements was cut for silage. Three systems were compared: ‘CN’, conventional mineral N application to a grass monoculture and broadcast slurry; ‘TN’, tactical mineral N application at fortnightly intervals to a grass monoculture with slurry injection and the early housing of cattle; ‘GC’, a mixed grass/white clover sward with no mineral N addition and slurry injection. Comparisons were made on two contrasting soil types: a freely-draining sandy loam (site 1) and a poorly drained clay (site 2). Financial budgets... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farmlets; Systems; Beef cattle; Nitrogen; Slurry; Animal production; Economics; UK; Farm Management. |
| Ano: 2002 |
URL: http://purl.umn.edu/6962 |
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| Bakosne Borocz, Maria; Fogarassy, Csaba. |
| Benchmarking alkalmazásával vizsgáltuk a hazánkban alkalmazott marhatartási technológiákat annak érdekében, hogy valamilyen módon az externális hatásokat be lehessen mutatni. A vizsgálataink eredménye, hogy a hagyományos technológia mellett található a legtöbb negatív externália, míg az extenzív, és az ökológiai tartásmód externális, valamint környezeti szempontból is a legjobb megoldást jelenti. ------------------------------ In our study we reviewed the conditions of extensive agricultural farming and its benefits based on environmental criteria. Furthermore we examined its external effects, which may affect the agriculture and the meat cattle breeding. Beef fattening, when done intensively, can cause huge environmental problems which may cause negative... |
| Tipo: Article |
Palavras-chave: Húsmarha; Extenzív; Benchmarkig; Környezet; Externália; Beef cattle; Extensive; Benchmarking; Environment; Externalities; Agribusiness; Environmental Economics and Policy; Livestock Production/Industries. |
| Ano: 2011 |
URL: http://purl.umn.edu/119900 |
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| Kramer, M.; Erbe, M.; Seefried, F.R.; Gredler, B.; Bapst, B.; Bieber, A.; Simianer, H.. |
| In this study, direct genomic values for the functional traits general temperament, milking temperament, aggressiveness, rank order in herd, milking speed, udder depth, position of labia, and days to first heat in Brown Swiss dairy cattle were estimated based on ∼777,000 (777k) single nucleotide polymorphism (SNP) information from 1,126 animals. Accuracy of direct genomic values was assessed by a 5-fold cross-validation with 10 replicates. Correlations between deregressed proofs and direct genomic values were 0.63 for general temperament, 0.73 for milking temperament, 0.69 for aggressiveness, 0.65 for rank order in herd, 0.69 for milking speed, 0.71 for udder depth, 0.66 for position of labia, and 0.74 for days to first heat. Using the information of... |
| Tipo: Journal paper |
Palavras-chave: Beef cattle; Breeding and genetics. |
| Ano: 2014 |
URL: http://orgprints.org/25080/1/Kramer_2014_Accuracy%20of%20direct%20genomic%20values.pdf |
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| Farah,Michel Marques; Fortes,Marina Rufino Salinas; Kelly,Matthew; Porto-Neto,Laercio Ribeiro; Meira,Camila Tangari; Carreño,Luis Orlando Duitama; Fonseca,Ricardo da; Moore,Stephen Stewart. |
| Abstract: The objective of this work was to evaluate the effects of genomic information on the genetic evaluation of hip height in Brahman cattle using different matrices built from genomic and pedigree data. Hip height measurements from 1,695 animals, genotyped with high-density SNP chip or imputed from 50 K high-density SNP chip, were used. The numerator relationship matrix (NRM) was compared with the H matrix, which incorporated the NRM and genomic relationship (G) matrix simultaneously. The genotypes were used to estimate three versions of G: observed allele frequency (HGOF), average minor allele frequency (HGMF), and frequency of 0.5 for all markers (HG50). For matrix comparisons, animal data were either used in full or divided into calibration (80%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bos indicus; Beef cattle; Genomics; Rare alleles. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600717 |
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| van Diepen, Pauline. |
| There is growing demand for and supply of organic milk. This results in more organic steers being produced. Many organic steer calves are sold to non-organic producers or are destroyed at birth. This is a serious issue for the organic dairy sector. This report also provides an overview of the current situation of the meat from the organic dairy sector, identifies opportunities for improving the marketing of organic dairy steer calves and provides a special focus on the use of dual-purpose breeds. Dual-purpose breeds were more often used in the past. Some organic dairy producers have returned to using dual-purpose breeds such as the MRI (Maas Rijn Ijssel) and the Shorthorn. Stakeholder interviews showed that the high milk price makes the dairy farmers... |
| Tipo: Report |
Palavras-chave: Dairy cattle; Breeding and genetics; Beef cattle; Farm economics. |
| Ano: 2007 |
URL: http://orgprints.org/11074/1/dual_purpose_cattle_breeds.pdf |
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| ENCARNAÇÃO, R. de O.; SCHENK, J. A. P.; ALVES. R. G. de O.. |
| Os adensamentos consistem em promover, periodicamente, rodeios (agrupar o rebanho de cria), sob a hipótese de que a aproximação de touros e vacas conduz a um maior índice de prenhez. Este trabalho teve como objetivo relatar a experiência de um estudo realizado para averiguar se essa pratica tem, efetivamente, o efeito esperado, bem como relatar as dificuldades encontradas. Foi conduzido numa propriedade particular representativa do Pantanal de Rio Verde de Mato Grosso, MS, no período de 1987 a 1990. Utilizaram-se 766 vacas neloradas e 46 touros da raça Nelore, mantidos em duas invernadas (pastagem nativa) de, aproximadamente, 1.500 hectares cada, cuja lotação foi de 3 hectares/unidade animal e a relação touro/vaca foi de 1:16. O ensaio envolveu dois... |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Bovino de corte; Nelore; Mato Grosso do Sul; Brasil; Mangement.; Eficiência Reprodutiva; Manejo; Reprodução.; Nellore; Pantanal; Beef cattle; Brazil; Reproductive performance.; Reproduction. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325277 |
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| Alföldi, Thomas. |
| Within the CORE Organic project MIX-ENABLE, Steffen Werne (FiBL) and his team are testing more sustainable ways of controlling gastrointestinal nematodes in ruminants. Farmers usually control parasites by using dewormers. However, resistance against these products is increasing. One approach is mixed grazing of different livestock species. It is well known that sheep and goats can benefit from mixed grazing with cattle in terms of animal health and performance. This is because gastrointestinal parasites are usually specialized in one livestock species, and mixed grazing has thus a “diluting” effect. Conversely, little is known whether young cattle can also benefit from mixed grazing with sheep. This is what Steffen Werne and his teams want to find out... |
| Tipo: Video |
Palavras-chave: Dairy cattle; Beef cattle; Sheep and goats; Health and welfare. |
| Ano: 2018 |
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| Registros recuperados: 717 | |
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