avaliação do efeito do bagaço de cana-de-açúcar in natura obtido por dois métodos sobre o desempenho e o comportamento ingestivo de bovinos de corte effect of raw sugar cane bagasse on performance and ingestive behavior of beef cattle

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ID: 141627
2008
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Abstract
Avaliou-se o efeito da utilização do bagaço de cana-de-açúcar in natura (BIN), obtido por dois métodos de extração do açúcar, moagem convencional ou difusão, como fonte de fibra em dietas que continham bagaço tratado sob pressão e vapor (BTPV), como principal fonte de volumoso sobre o desempenho e o comportamento ingestivo de bovinos confinados. Para avaliação do desempenho, foram utilizados 84 machos não castrados das raças Nelore, Canchim e Holandesa, com média de peso inicial de 270kg, distribuídos em delineamento de blocos ao acaso. Para a avaliação do comportamento ingestivo, foram utilizados quatro garrotes da raça Nelore, em delineamento de quadrado latino 4 x 4. Os tratamentos consistiram na substituição do BTPV pelo BIN na matéria seca, constituindo as dietas experimentais: 5% BIN moagem convencional; 5% BIN difusão, 10% BIN difusão e 15% BIN difusão. O consumo de MS foi menor no tratamento com 15% de BIN obtido por difusão (BINdif), em relação ao teor de inclusão de 10%. Não houve diferença (P>0,05) entre os tratamentos para ganho diário de peso, conversão alimentar e peso vivo final entre os tratamentos. Os tempos despendidos com as atividades de ruminação (minutos/kg de MS) e mastigação (minutos/kg de MS ou de FDN) foram maiores (P<0,05) no tratamento com 15% de BINdif na dieta. O BINdif pode ser utilizado como fonte de fibra íntegra em até 15% da MS da dieta sem prejudicar o desempenho dos animais.
This study was conducted to evaluate effects of replacing steam pressure treated sugar cane bagasse by two types of raw sugar cane bagasse extracted through grinding or diffusion, on performance and ingestive behavior of beef cattle. Eighty four young bulls (Nelore, Canchim and Holstein) with 270kg of body weight at the beginning of the experiment were used in a randomized block design. Ingestive behavior was evaluated using four Nelore young bulls in a 4 x 4 Latin square design. Treatments were the direct substitution of steam pressure treated sugarcane bagasse by raw bagasse (RB), corresponding to the experimental treatments: 5% RB from grinding; 5% RB from diffusion; 10% RB from diffusion and 15% RB from diffusion. Dry matter intake was lower in treatment with 15% of bagasse obtained by diffusion (BINdif) in comparison to 10% BINdif. There were no differences (P>0.05) among treatments for average daily gain, feed conversion and final live weight. Ruminating time (minutes/kg of DM) and chewing time (minutes/kg of DM or NDF) was greater (P>0.05) when BINdif was added at 15% level to diets. BINdif can be added up to 15% of the dietary DM with no detrimental effect on beef cattle performance.
Reference Key
rabelo2008arquivoavaliao Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;M.M.A. Rabelo;A.V. Pires;I. Susin;C.Q. Mendes;R.C. Oliveira Jr.;R.S. Gentil;E.M. Ferreira
Journal Environmental research
Year 2008
DOI
10.1590/S0102-09352008000300026
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000300026
Keywords
fiber nelore ruminatinganimal culture

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