Beef Calves
Mostrando 1-12 de 85 artigos, teses e dissertações.
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1. Phylogeography of msp4 genotypes of Anaplasma marginale in beef cattle from the Brazilian Pantanal
Resumo O gene msp4 de A. marginale é unicodon, estável e pouco heterogêneo, sendo considerado como um marcador útil para caracterização filogeográfica desta bactéria. Este trabalho teve como objetivo analisar a filogeografia de A. marginale com base no gene msp4 em bovinos de corte do Pantanal Brasileiro, comparativamente a outra regiões do mundo. A
Rev. Bras. Parasitol. Vet.. Publicado em: 01/08/2019
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2. Citrus pulp-based supplement reduces the detrimental effects of high grazing pressure on the performance of beef cattle under a rotational system of Urochloa brizantha
RESUMO Os objetivos foram avaliar o desempenho de tourinhos em duas estratégias de pastejo e a suplementação energética em um sistema de lotação rotacionadade capim marandu (Urochloa brizantha) e avaliar a composição morfológica e bromatológica da gramínea. Oitenta bezerros não castrados com 8 meses de idade [224 ± 2,4 kg peso vivo (PV)] distrib
Rev. bras. saúde prod. anim.. Publicado em: 15/07/2019
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3. PRODUCTIVE PERFORMANCE OF PRE-WEANED CALVES REARED IN THE PANTANAL
Resumo A desmama precoce (DP) vem sendo adotada nas fazendas de cria do Pantanal como alternativa para o aumento dos índices de concepção das vacas. A principal receita dessas propriedades são os bezerros (as), sendo o seu valor dependente dos seus respectivos pesos. Assim é necessário que os bezerros submetidos à DP, apresentem pesos semelhantes ou a
Ciênc. anim. bras.. Publicado em: 04/02/2019
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4. Partum and postpartum characteristics on the postpartum rebreeding in beef cattle
ABSTRACT The objective was to evaluate the influence of calving and postpartum characteristics, measured in different genetic predominance, on the postpartum rebreeding. Were evaluated 437 partum from cows that received feeding management consisting of a forage base of the native field and the mating season consisted of 90 days. The measurements were used fr
An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018
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5. Impact of embryo transfer phenotypic records on large-scale beef cattle genetic evaluations
ABSTRACT We aimed to evaluate the impact of using embryo transfer (ET) information on weaning weight estimated breeding values (EBV) and its accuracy. Data from Hereford and Braford cattle, raised under extensive conditions in Southern Brazil, were used. A model that included ET information in addition to maternal (genetic and permanent environmental) effect
R. Bras. Zootec.. Publicado em: 18/06/2018
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6. Factors affecting the selling prices of calves in auctions in Santa Catarina State, Brazil
ABSTRACT The objective of this study was to investigate the effects of genetic group and calf sex on selling prices in auctions in the state of Santa Catarina (SC), Brazil. We evaluated 33,143 animals, representing 3,587 lots in 47 auctions from 2009 to 2014. The calves were classified according to genetic groups: British breed or crossbreed (BX); Continenta
R. Bras. Zootec.. Publicado em: 2016-10
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7. Quality of the forage apparently consumed by beef calves in natural grassland under fertilization and oversown with cool season forage species
The objective of this study was to evaluate the chemical composition of the forage apparently consumed by steers in a natural grassland on region of Campanha, in Rio Grande do Sul, Brazil, subjected or not to different inputs: NP - natural pasture without inputs; FNP - fertilized natural pasture and INP - improved natural grassland with fertilization and ove
Revista Brasileira de Zootecnia. Publicado em: 2012-06
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8. Impact of nitrogen fertilization on the forage characteristics and beef calf performance on native pasture overseeded with ryegrass
The overseeding of ryegrass (Lolium multiflorum Lam) on sub-tropical native pastures increases the availability and quality of forage in the cold season. However, soil chemical amendment and nitrogen use can affect the floristic composition, with consequences to the primary and secondary production. In a randomized complete block design with three replicatio
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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9. Net requirements of energy, protein and macrominerals for weight gain of grazing beef cattle castrated at different ages, with and without supplementation
The objective of this experiment was to estimate the requirements of energy, protein and macrominerals of grazing crossbreds calves, in Brachiaria decumbens Stapf pasture, castrated at different ages, with and without supplementation. Forty-seven young calves at initial age of 120±30.1 days and 115.3±1.97 kg of live weight were used. To estimate net energy
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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10. Breeding objectives and economic values for traits of low input family-based beef cattle production system in the State of Rio Grande do Sul
The objectives of this study were to define breeding objectives and derive economic weights for production traits in family-based beef cattle systems, assess the sensitivity of these weights to changes in market and husbandry indicators and estimate the expected genetic changes in the selection criteria proposed. Based on data from the production systems, fa
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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11. Avaliação do desempenho e níveis de proteção sorológica em terneiros vacinados contra tristeza parasitária bovina (TPB) comparados aos naturalmente infestados por carrapatos / Avaliação do desempenho e níveis de proteção sorológica em terneiros vacinados contra tristeza parasitária bovina (TPB) comparados aos naturalmente infestados por carrapatos / Evaluation of performance and levels of serological protection in calves vaccinated against tick fever (TF) compared to naturally tick infested calves / Evaluation of performance and levels of serological protection in calves vaccinated against tick fever (TF) compared to naturally tick infested calves
This study analyzed, by reaction to indirect immunofluorescence and individual weighting, the levels of protection and weight-gain in beef calves from birth to the age of eight month, which received two doses of vaccine against tick fever and were maintained free from ticks, compared to naturally infested calves in extensive management conditions with contin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
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12. COMPORTAMENTO INGESTIVO DE NOVILHAS E TERNEIRAS DE CORTE RECRIADAS EM CAMPO NATIVO NO PERÍODO DE OUTONO-INVERNO / INGESTIVE BEHAVIOR OF BEEF HEIFERS AND CALVES REARED IN NATURAL PASTURE UNDER ROTATIONAL GRAZING DURING AUTUMN-WINTER
A experiment, in the period May- September 2011, was conducted in an area of Universidade Federal de Santa Maria studying the ingestive behavior of beef heifers and calves in a natural grassland of Rio Grande do Sul, under rotational grazing with different intervals among grazing. The intervals among grazing was determinated by the thermal sums of 375 and 75
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011