Beef Steers
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. Effects of antibiotic growth promoters and concentrate on intake, digestibility, degradability, and ruminal variables in beef steers
RESUMO O objetivo foi avaliar a adição de antibióticos promotores de crescimento ao concentrado sobre o consumo, digestibilidade, degradabilidade in situ e variáveis ruminais de novilhos. Quatro novilhos em um delineamento quadrado latino foram alimentados com feno (ad libitum), concentrado [10g kg-1 do peso corporal (PC)] e mistura mineral (0,272g kg-1
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2022
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2. Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options
ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Br
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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3. Alterações fisiológicas e comportamentais de bovinos de corte após o manejo de castração
RESUMO Objetivou-se avaliar o desempenho, parâmetros fisiológicos e temperamentais de bovinos de corte não castrados ou submetidos à castração cirúrgica ou à imunocastração. O período experimental foi dividido em dois subperíodos de observações: primeiros 15 dias pós-castração (período de cicatrização) e os 25 dias seguintes à cicatriza�
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2019-02
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4. Crude glycerin combined with food additives in feeding beef cattle
ABSTRACT The objective of this study was to evaluate the effects of adding crude glycerin with food additives (sodium monensin or essential oils) to the diets of beef cattle on feed intake, ruminal parameters, in vitro digestibility, and production of greenhouse gases. Five ruminally cannulated Nellore steers were randomly assigned in a 5×5 Latin square des
R. Bras. Zootec.. Publicado em: 29/11/2018
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5. Beef cattle performance in response to Ipyporã and Marandu brachiariagrass cultivars under rotational stocking management
ABSTRACT The objective of this two-year study was to evaluate live weight gain per animal and per area and their relationships with the characteristics of BRS Ipyporã (Brachiaria ruziziensis × Brachiaria brizantha) and Marandu (Brachiaria brizantha) pastures. A completely randomized block design was used with two treatments and four replicates. The grazing
R. Bras. Zootec.. Publicado em: 29/11/2018
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6. População de protozoários ruminais em novilhos zebuínos alimentados com ou sem volumoso
ABSTRACT This study aimed to quantify and identify the profile of the rumen protozoa population of beef steers fed with or without roughage. Nellore crossbred steers raised in extensive system on lignified tropical pastures with mineral supplementation and steers confined for 60 days only receiving pelletized concentrate and whole corn kernels were evaluated
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2017-10
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7. BREED AND CARCASS CHARACTERISTICS ON LOSSES BY BRUISES AND MEAT PH IN BEEF OF STEERS AND CULLING COWS
Resumo Objetivou-se avaliar os efeitos de grupo genético, maturidade e escore de gordura de acabamento de bovinos sobre perdas por contusões e valor do pH final da carcaça de bovinos machos e fêmeas. O número de contusões e o valor final do pH das carcaças foram avaliados como variável resposta em função do grupo genético, da maturidade fisiológi
Ciênc. anim. bras.. Publicado em: 24/07/2017
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8. Fatty acid profile of meat, diurnal changes in volatile fatty acids, rumen fluid parameters, and growth performance in Korean native (Hanwoo) steers fed high- and low-forage diets supplemented with chromium-methionine
ABSTRACT The objective of this study was to determine the effects of forage level in diets supplemented with chromium-methionine (Cr-Met) on rumen fluid parameters, meat fatty acid composition, and performance of Korean beef (Hanwoo) steers. Twenty-three Hanwoo steers were used in this experiment. A completely randomized design and repeated measurements were
R. Bras. Zootec.. Publicado em: 2016-08
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9. Effects of polymer coated slow-release urea on ruminal fermentation and nutrient total tract digestion of beef steers
ABSTRACT The objective of this study was to evaluate the effects of polymer coated slow-release urea (SRU) in high-forage diets of beef steers on nutrient intake and digestibility, ruminal fermentation, microbial protein synthesis, and energy balance. Eight 24-mo-old rumen-fistulated castrated Nellore steers (average body weight = 418.0±40.0 kg) were used i
R. Bras. Zootec.. Publicado em: 2016-02
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10. Slow-release urea in supplement fed to beef steers
Replacing regular urea (RU) by slow-release urea (SRU) at two levels of non-protein nitrogen (NPN) in concentrate, offered with low-quality roughage, was evaluated in beef steers on dry matter intake (DMI), ruminal fermentation parameters, plasma urea nitrogen (PUN), total tract apparent digestibility of diets and in situ degradability of nitrogen sources. E
Braz. arch. biol. technol.. Publicado em: 2015-02
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11. 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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12. Reducing supplementation frequency for Nellore beef steers grazing tropical pastures
Reduced supplementation frequency is a broadly applied management practice. Ruminants consuming low quality forages/pastures, supplemented less than once daily are able to maintain body weight gain (BWG), efficiency of use of dry matter, nitrogen and other nutrients, as compared with animals supplemented once daily. We evaluated the feeding behavior, dry mat
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-04