The effect of source of nitrogen used for supplementation of high wheat silage diets for cattle

Brosh, A.; Holzer, Z.; Levy, David A.

doi:10.1017/s0003356100005201

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Resultados semelhantes também foram determinados por Brosh et al (1990), Petit et al (1991) e Rocha et al (1995), que constataram uma melhor conversão alimentar para os animais alimentados com a farinha de peixe, quando comparada com o farelo de soja. No entanto, Smith et al (1985), Steen (1985) e Comerford et al (1992) observaram conversões alimentares semelhantes para a farinha de peixe e o farelo de soja.…”

Section: Table 4 -Initial Live Weight (Ilw) Final Live Weight (Flw)unclassified

“…Algumas pesquisas, no entanto, revelam uma falta de resposta, como foi demonstrado por Gontijo Filho et al (1977) e Keyserlingk & Mathison (1993). Pesquisas com farinha de pena hidrolisada como fonte protéica para ruminantes são limitadas, e a sua utilização normalmente gera respostas semelhantes ou inferiores ao outro suplemento no qual a farinha foi comparada, sendo isso comprovado por Jordan & Jordan (1955), Brow & Pate (1997) e Jauris (1998).…”

Section: Introductionunclassified

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Avaliação das Farinhas de Peixe e Pena, no Confinamento de Bezerros Leiteiros Desmamados, Através de Dietas Calculadas em Termos de Proteína Bruta ou de Proteína Metabolizável

et al. 2002

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RESUMO -Os objetivos deste trabalho foram avaliar três fontes protéicas -o farelo de soja e as farinhas de peixe e de pena -e dois métodos de cálculo de rações -o calculado em termos de proteína bruta (PB), segundo recomendações do NRC (1988), e o proposto pelo AFRC (1993) Evaluation of Fish and Feather Meals for Confined Dairy Calves Weaned Through Diets Calculated in Terms of Crude Protein or Metabolizable ProteinABSTRACT-The objectives of this work were to evaluate three protein sources -soybean meal, fish meal and feather meal -and two methods of calculation of rations -the calculated in terms of crude protein (CP), according to recommendations of NRC (1988); and the proposed by the AFRC (1993), and calculated in terms of metabolizable protein (MP) -through the performance of calves. The animals were confined and submitted to five diets, that varied only protein sources in its composition, thus discriminated: SM-Soybean Meal, FsM-Fish Meal, FeM-Feather Meal, FsMU-Fish Meal and Urea, and FeMU Feather Meal and Urea. A complete diet was supplied, composed of 40% of sorghum silage and 60% of concentrate. All treatments possessed about of 2.56 Mcal/kg DM of metabolizable energy, being the treatments SM, FsM and FeM calculated by the system of CP, with 18% of CP, and the treatments FsMU and FeMU, calculated by the system of MP, with 16.3% of CP and a same amount of metabolizable protein than the treatment SM, with 112.0 grams of MP/ day. Individually, the treatments did not present significant differences (P>0.05) in the final alive weight, in daily gain weight and in dry matter intake, having differences only in the feed:gain ratio. The best feed:gain ratio happened in the treatment FsM and the worst in the treatment FeMU. It is concluded that the MP method provides similar results to the method of CP. The treatments with fish meal provide larger weight gains, smaller intake and better feed:gain ratio than the treatments with feather meal, staying the treatment soybean meal with intermediary daily gain.

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Section: Table 4 -Initial Live Weight (Ilw) Final Live Weight (Flw)unclassified

Section: Introductionunclassified

Avaliação das Farinhas de Peixe e Pena, no Confinamento de Bezerros Leiteiros Desmamados, Através de Dietas Calculadas em Termos de Proteína Bruta ou de Proteína Metabolizável

et al. 2002

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Rumen fermentation patterns and nutrient digestion in lambs fed cottonseed meal supplemental diets

Nagalakshmi

Sastry

Pawde

2003

Animal Feed Science and Technology

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Effect of dietary protein concentration and source on the growth rate and on body composition of Holstein-Friesian male calves

et al. 2000

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Holstein-Friesian male calves, aged 160 to 450 days, and of live weight 180 to 530 kg, were used to determine the effects of dietary nitrogen level and dietary nitrogen source on performance. Experiment 1, tested dietary nitrogen level, and involved two trials with three dietary-nitrogen levels and equal dietary metabolizable energy (ME) 11·7 MJ/kg dry matter (DM). The crude protein (CP) level was reduced in the course of the trials by 40 g/kg, the experimental average CP in the diets being 146, 126 and 106 g/kg for the high (HP), medium (MP) and the low protein (LP) diets, respectively. The urea space (US) for estimation of body protein deposition and the rumen volume for calculation of empty body weight were measured in trial A of experiment 1. Experiment 2 involved four diets of equal ME concentrations; (11-7 MJ/kg DM), in three of which the CP contents were equal but from different sources: (a) 110 g/kg, all of it true protein (TP), negative control; (b) 130 g/kg, all of it TP; (с) 130 g/kg CP, 20 g/kg of it is poultry litter (PL) protein; (d) 130 g/kg CP, 40 g/kg of it is PL protein. Significantly lower US and ratio of US to live weight were found in the calves on the LP diet, from the age of 265 days than in the calves on the other diets. The ratio of US to live weight significantly decreased with increasing age in all protein level treatments. Until the age of 300 days the rumen volume was significantly higher on the LP diet than on the other diets. Calves on the HP diet had the highest daily gain and carcass gain. The recommendation to reduce the dietary protein as age increased to lower than 120 g/kg caused a reduction in the energy retained from the diet but protein deposition was not impaired. Protein deposition was impaired when the CP was reduced by 20 g/kg below the level recommended by the National Research Council. The inclusion of poultry litter in the diet, with ME concentration being maintained, did not reduce the rate of live-weight gain, and improved food conversion efficiency.

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The effect of source of nitrogen used for supplementation of high wheat silage diets for cattle

Cited by 3 publications

References 11 publications

Avaliação das Farinhas de Peixe e Pena, no Confinamento de Bezerros Leiteiros Desmamados, Através de Dietas Calculadas em Termos de Proteína Bruta ou de Proteína Metabolizável

Avaliação das Farinhas de Peixe e Pena, no Confinamento de Bezerros Leiteiros Desmamados, Através de Dietas Calculadas em Termos de Proteína Bruta ou de Proteína Metabolizável

Rumen fermentation patterns and nutrient digestion in lambs fed cottonseed meal supplemental diets

Effect of dietary protein concentration and source on the growth rate and on body composition of Holstein-Friesian male calves

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