Crossbred Cattle
Mostrando 13-24 de 86 artigos, teses e dissertações.
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13. Sulfur sources in protein supplements for ruminants
The present study evaluates the efficiency of different sulfur sources for ruminant nutrition. The fiber digestibility and the amino acid profile were analyzed in the duodenal digesta of crossbred steers fed Brachiaria dictyoneurahay. The sources utilized were elemental sulfur (ES70S), elemental sulfur (ES98S); calcium sulfate in hydrated (HCS), CaSO4.2H2O,
R. Bras. Zootec.. Publicado em: 2014-10
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14. Whole or ground millet grain provided in two supplementation frequencies for grazing beef cattle: nutritional parameters
The objective of this study was to evaluate the processing of millet grain provided at two supplementation frequencies for grazing beef cattle during the dry season on nutritional parameters. Five rumen-cannulated crossbred steers, with 24 to 26 months of age and average body weight of 428.6±26.06 kg, were assigned to a Latin square design (5 × 5) in a 2 �
R. Bras. Zootec.. Publicado em: 2014-05
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15. Risk assessment of finishing beef cattle in feedlot: slaughter weights and correlation amongst input variables
The objective of this study was to evaluate the risk associated with finishing crossbred Charolais × Nellore steers in feedlot at different slaughter weights (425, 467 or 510 kg), considering or disregarding the correlation amongst random input variables. Data were collected from 2004 to 2010 and used in the simulation of the financial indicator Net Present
R. Bras. Zootec.. Publicado em: 2014-02
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16. Total digestible nutrient levels in supplements for finishing steers in the rainy season: nutritional characteristics and microbial efficiency
The objective of this study was to evaluate the effects of total digestible nutrient (TDN) levels in supplements on rumen pH, ruminal ammonia nitrogen concentration, intake and digestibility, nitrogen balance and microbial efficiency in beef cattle grazing on Marandu grass during the rainy season. The supplements comprised a mineral mixture, ground corn grai
R. Bras. Zootec.. Publicado em: 2013-11
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17. Nutritional performance of cattle grazing on low-quality tropical forage supplemented with nitrogenous compounds and/or starch
The objective of this work was to evaluate the effects of protein and/or starch supplementation on the nutritional performance of cattle grazing on low-quality tropical forage. Five crossbred steers (Holstein × Gyr) with an average body weight (BW) of 397 kg that were fitted with ruminal and abomasal cannulae were used. The animals were kept in individual s
R. Bras. Zootec.. Publicado em: 2013-09
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18. Ajustes de curvas de lactaÃÃo de vacas mestiÃas das raÃas holandesa e gir. / ADJUSTMENTS OF LACTATION CURVES OF COWS CROSSBRED OF RACES HOLSTEIN AND GIR
O objetivo do presente estudo foi ajustar a curva de lactaÃÃo de um rebanho bovino, utilizando-se 415 lactaÃÃes, referentes a 19.025 controles de 206 vacas mestiÃas das raÃas Holandesa e Gir. Os dados dos controles leiteiros semanais utilizados neste estudo sÃo provenientes da propriedade localizada no municÃpio de Beberibe, na zona litorÃnea do Est
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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19. Validação do nanolipe como indicador para estimativa do consumo em bovinos leiteiros
Five crossbred heifers were used in order to validate the NANOLIPE as a marker to estimate dry matter intake in dairy cattle. The results obtained with this marker were compared with three other methods: total collection, fecal crude protein and Klason Lignin (in combination with NANOLIPE). There was no difference between the methods tested (P>5%), a fact th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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20. Grão de soja em suplementos múltiplos para novilhas de corte em pastejo / Soybean in multiple supplements for grazing beef heifers
This dissertation was prepared from two experiments with beef heifers submitted to different supplementation strategies on pasture. In the first experiment aimed to evaluate the effect of replacing soybean meal by soybean at different levels in multiple supplements on the nutritional characteristics and productive performance of heifers grazing in Uruchloa d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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21. Association of polymorphisms in the leptin and thyroglobulin genes with meat quality and carcass traits in beef cattle
The objective of the present study was to estimate the allelic and genotypic frequencies of the polymorphisms E2FB (AY138588.1: c.305C> T), located in the leptin gene (LEP), and TG5 (X05380.1:g.-422C>T), located in the thyroglobulin gene (TG), and evaluate the association of these polymorphisms in crossbred cattle of seven distinct genetic groups with the fo
R. Bras. Zootec.. Publicado em: 2012-10
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22. Performance and nutritional evaluation of beef cattle raised on pasture, castrated at different ages, with and without supplementation
The objective of this study was to evaluate performance and nutritional traits of beef cattle raised on pastures, castrated at different ages, with and without supplementation. Forty-four crossbred young bulls with predominance of Zebu breed at initial average age of 120±30 days were used in the experiment. Animals were distributed in a completely randomize
Revista Brasileira de Zootecnia. Publicado em: 2012-04
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23. Nutritional requirements of energy, protein and macrominerals for maintenance and weight gain of young crossbred Nellore × Holstein bulls on pasture
The objective of this study was to estimate requirements of energy, protein and macrominerals of young Nellore/Holstein crossbreds bulls supplemented on pastures of Brachiaria decumbens Stapf. Thirty-five young bulls, at 8.53±0.18 months of age and with initial body weight of 230.6±6.1 kg were used. Ten animals were slaughtered as reference, in different w
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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24. Corn silage with and without enzyme-bacteria inoculants on performance, carcass characteristics and meat quality in feedlot finished crossbred bulls
Two height cuttings of corn silage with or without enzyme inoculants were evaluated for 68 days on performance, carcass characteristics, meat quality and chemical composition of the Longissimus muscle in crossbred bulls (F1 - ½ Nellore vs. ½ Angus) finished in feedlot. Thirty-two 20-month-old bulls, with initial average weight of 374±25 kg, were kept in i
Revista Brasileira de Zootecnia. Publicado em: 2012-01