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Intake and digestibility in cattle fed low-quality tropical forage and supplemented with nitrogenous compounds R. Bras. Zootec.
Lazzarini,Isis; Detmann,Edenio; Sampaio,Cláudia Batista; Paulino,Mário Fonseca; Valadares Filho,Sebastião de Campos; Souza,Marjorrie Augusto de; Oliveira,Fabrício Albani.
The objective of this study was to evaluate the effects of supplementation with nitrogenous compounds on intake, digestibility, and rumen microbial synthesis in cattle fed low-quality tropical forage. Five crossbred heifers, averaging 209 kg and fitted with ruminal fistulla, were used. The animals were fed ad libitum with signal grass (Brachiaria decumbens Stapf.) hay, which had crude protein (CP) content of 5.08%, as dry matter (DM) basis. The five treatments were defined according to the increasing level of CP in the diet (0, 3, 5, 7, and 9 percentile points above the forage CP level). The supplement consisted of the following nitrogen sources: urea, ammonium sulfate and albumin (4.5:0.5:1.0, respectively). The experiment was carried out according to a 5...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria decumbens; Microbial protein synthesis; Rumen ammonia nitrogen; Supplementation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001000024
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Intake and digestibility in cattle under grazing supplemented with nitrogenous compounds during dry season R. Bras. Zootec.
Figueiras,Janderson Florencio; Detmann,Edenio; Paulino,Mário Fonseca; Valente,Tiago Neves Pereira; Valadares Filho,Sebastião de Campos; Lazzarini,Isis.
The objective of this work was to evaluate the effects of supplementation with nitrogenous compounds on intake and digestibility in cattle under grazing during dry season. It was used five Holstein × Zebu steers with average initial live weight of 236 kg, kept in five Brachiaria decumbens Stapf. paddocks (0.34 ha). The experiment was carried out according to a 5 × 5 Latin square design, with five supplementation levels and five experimental periods. The supplementation levels were the following: 0; 0.35; 0.70; 1.05, and 1.40 g of crude protein/kg live weight. A mixture of urea, ammonium sulfate and albumin (4.5:0.5:1.0, respectively) was used as nitrogen supplement. The average crude protein levels in the diet were 7.39; 8.92; 10.98; 12.55; and 13.62%, as...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial nitrogen; Rumen ammonia nitrogen; Supplementation; Urea.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000600020
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