Dinâmica da pastagem e desempenho de novilhos em pastagem de capim-tanzânia sob diferentes ofertas de forragem

Barbosa, Marco Aurélio Alves de Freitas; Júnior, Domicio do Nascimento; Cecato, Ulysses

doi:10.1590/s1516-35982006000600004

Cited by 30 publications

(21 citation statements)

References 10 publications

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“…The total dry matter available to the animals were always higher than 7.0 to 11.0% of the body weight of the animals in dry matter, considered by Barbosa et al (2006) as needed to guarantee the maximum intake of forage, the lowest grazing time and the greatest quantity of forage degraded in the rumen (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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-The objective of this work was to evaluate the effect of using multiple supplements with different levels of cottonseed meal 38% on intake, total apparent digestibility of dietary components, efficiency of microbial synthesis and productive performance of beef heifers in Brachiaria decumbens pasture during the rainy season. It was used 25 Nellore heifers and 10 crossbred heifers with predominance of Zebu breed at 16 months of age and with 249.8 ± 0.6 kg of body weight. It was used a complete random experimental design with five treatments and seven replicates. Supplements contained approximately 30% of crude protein (CP) and soybean meal replaced by cottonseed meal 38% at the levels 0; 33; 67 and 100%, (CS 0 , CS 33 , CS 67 and CS 100 , respectively) evaluated in relation to a control group, which received only mineral mixture (MM) ad libitum.Daily weight gain was 397, 546, 570, 525 and 542 g, respectively, for the groups MM, CS 0 , CS 33 , CS 67 and CS 100 . There was no effect of the levels of cottonseed meal 38% on daily weight gain, which differed among animals fed supplement and control group, however. Intakes of crude protein and non-fibrous carbohydrates (NFC) in kg/day were greater in groups under supplementation. Coefficients of total apparent digestibility of CP and NFC were greater in animals fed supplements in relation to the control group. Increase on the replacement level of soybean meal by cottonseed meal had a positive linear effect on coefficients of total apparent digestibility of DM, organic matter and CP. There was no difference on microbial efficiency, expressed as g of crude protein per kg of TDN consumed by the animals under supplements and the ones of the control group, neither it was observed difference among levels of replacement of soybean meal by cottonseed meal. The use of cottonseed meal 38% replacing soybean meal in the diet does not harm performance of grazing beef heifers.

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Section: Resultsmentioning

confidence: 99%

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Barros¹,

Paulino²,

Filho³

et al. 2011

R. Bras. Zootec.

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“…A matéria seca total disponível aos animais esteve sempre acima dos valores de 7,0 a 11,0% do PV dos animais em matéria seca, considerados por Barbosa et al (2006) necessários para garantir consumo máximo de forragem, menor tempo de pastejo e maior quantidade de forragem degradada no rúmen.…”

Section: Resultsunclassified

Uréia em suplementos protéico-energéticos para bovinos de corte durante o período da seca: características nutricionais e ruminais

Moraes¹,

Paulino²,

Moraes³

et al. 2009

R. Bras. Zootec.

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RESUMO -Objetivou-se avaliar o consumo, a digestibilidade, o pH e a concentração de amônia do líquido ruminal, a concentração de nitrogênio sérico e urinário e a síntese microbiana em novilhos recebendo suplemento durante o período da seca. Utilizaram-se quatro novilhos mestiços Zebu × Holandês, castrados, com peso médio inicial de 430 kg, fistulados no esôfago, rúmen e abomaso e distribuídos em quatro piquetes de Brachiaria decumbens, cada um com 0,40 ha. Cada animal recebeu 4,0 kg/dia de suplemento, constituído de milho moído, farelo de algodão, mistura mineral e uréia/sulfato de amônia em quatro níveis (0; 1,2; 2,4 e 3,6% na matéria natural). Os consumos de matéria seca total, 2,0% (10,9 kg/dia), e de pasto, 2,3% (7,1 kg/dia), matéria orgânica, 2,2% (9,7 kg/dia), matéria orgânica do pasto, 2,3% (6,3 kg/dia), proteína bruta, 1,9% (1,3 kg/dia), extrato etéreo, 3,6% (0,4 kg/dia), fibra em detergente neutro, 1,9% (5,8 kg/dia), carboidratos totais, 2,3% (8,2 kg/dia), e carboidratos não-fibrosos, 2,9% (4,1 kg/dia), foram influenciados de forma quadrática pelos níveis de uréia nos suplementos. Apenas a digestibilidade total da matéria orgânica foi afetada, de forma linear positiva, pelos níveis and non-fiber carbohydrate (NFC) presented quadratic behavior. The maximum responses on the urea levels were: 2.0%(10.9 kg/day), 2.3% (7.1 kg/day), 2.2% (9.7 kg/day), 2.3% (6.3 kg/day), 1.9% (1.3 kg/day), 3.6% (0.4 kg/day), 1.9%(5.8 kg/day), 2.3% (8.2 kg/day) and 2.9% (4.1 kg/day), respectively, for TDM, DMP, OM, OMP, CP, EE, NFD, TC and NFC. The OM digestibility was affected with a linear behavior. No differences were observed for the pH values. However, ammonia concentration increased linearly as the urea level in the supplement increased. The urea level in supplement increased linearly the nitrogen in serum and urinary excretion of nitrogen from urea. No effect from the urea level on the microbial efficiency, expressed by different forms, was observed.

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“…Para isso alguns autores têm utilizado a manipulação da pastagem em diferentes alturas (CECATO et al, 2001;CANO et al, 2004) ou diferentes ofertas de lâminas foliares verdes (BARBOSA et al, 2006;MACHADO et al, 2007).…”

Section: Dinâmica De Espécies Tropicais No Sul Do Brasilunclassified

Cattle breeding in summer grassland in southern Brazil – a review

Osmari¹,

Argenta²,

Paula³

et al. 2015

Pubvet

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Dinâmica da pastagem e desempenho de novilhos em pastagem de capim-tanzânia sob diferentes ofertas de forragem

Cited by 30 publications

References 10 publications

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Uréia em suplementos protéico-energéticos para bovinos de corte durante o período da seca: características nutricionais e ruminais

Cattle breeding in summer grassland in southern Brazil – a review

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