Aditivos químicos e biológicos na ensilagem de cana-de-açúcar: 1. composição química das silagens, ingestão, digestibilidade e comportamento ingestivo
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Data
2007-10-01
Autores
Schmidt, Patrick [UNESP]
Mari, Lucas José
Nussio, Luiz Gustavo
Pedroso, André de Faria
Paziani, Solidete de Fátima
Wechsler, Francisco Stefano [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Zootecnia
Resumo
Avaliou-se o efeito da inclusão de aditivos na ensilagem de cana-de-açúcar (Saccharum officinarum L.) sobre a composição químico-bromatológica das silagens, o comportamento ingestivo, o consumo voluntário e a digestibilidade em bovinos de corte. Utilizaram-se cinco novilhos da raça Nelore providos de cânula ruminal, alocados em delineamento quadrado latino 5 ´ 5 e alimentados com dietas com 65% de volumoso na MS. Foram avaliadas cinco silagens (base úmida): controle - cana-de-açúcar sem aditivos; uréia - cana-de-açúcar + 0,5% uréia; benzoato - cana-de-açúcar + 0,1% de benzoato de sódio; LP - cana-de-açúcar inoculada com Lactobacillus plantarum (1 ´ 10(6) ufc/g MV); LB - cana-de-açúcar inoculada com L. buchneri (3,6 ´ 10(5) ufc/g forragem). A forragem foi armazenada em silos do tipo poço por 90 dias antes do fornecimento aos animais. A composição químico-bromatológica da cana-de-açúcar foi alterada após a ensilagem, em relação à cana-de-açúcar original, com redução no teor de carboidratos solúveis e na digestibilidade in vitro e elevação relativa nos teores de FDN e FDA. Os teores de etanol (0,30% da MS) e ácidos orgânicos (0,99% de ácido lático e 2,31% de acético) foram baixos e semelhantes entre as silagens. Os aditivos aplicados na ensilagem não promoveram alterações no consumo e na digestibilidade aparente da MS (7,2 kg/dia e 63,6%, respectivamente). O comportamento ingestivo dos animais também não foi alterado, com tempos médios de 230,6; 519,6 e 672,8 minutos/dia despendidos com ingestão de ração, ruminação e ócio, respectivamente. Os aditivos acrescidos à cana-de-açúcar promoveram pequenas alterações na maioria das variáveis avaliadas.
The effect of the addition of additives in the ensiling of sugar cane (Saccharum officinarum L.) on chemical composition of silages, ingestive behavior, voluntary feed intake and digestibility by beef steers. Five rumen-cannulated Nelore steers were allotted to a 5 x 5 latin square design. The steers were placed in metabolic cages and they were fed with diets with 65% forage (%DM). Five silages were evaluated (wet basis): Control sugar cane, no additives; Urea sugar cane + 0.5% of urea; Benzoate sugar cane + 0.1% of sodium benzoate; LP - sugar cane inoculated with Lactobacillus plantarum (1 x 10(6) cfu/g forage); LB sugar cane inoculated with L. buchneri (3.6 x 10(5) cfu/g forage). During 90 days, before the animal feeding, the forage was stocked in vertical silos. The chemical composition of sugar cane changed after the ensiling, as compared to fresh sugar cane, with reduction of water soluble carbohydrates and in vitro digestibility and relative increase in the NDF and ADF content. Ethanol (0.30% DM) and organic acids (0.99% of lactic and 2.31% of acetic acid) contents were low and similar among silages. The additives applied in the ensiling did not promote alterations in the voluntary intake and apparent digestibility of DM that showed average values of 7.2 kg/day and 63.6%, respectively. The ingestive behavior of the animals also was not altered, with average time spent in feeding, rumination and idleness were: 230.6, 519.6 and 672.8 minutes/day activities, respectively.So, the additives applied in the sugar cane forage resulted in slightly changes in most of the studied variables.
The effect of the addition of additives in the ensiling of sugar cane (Saccharum officinarum L.) on chemical composition of silages, ingestive behavior, voluntary feed intake and digestibility by beef steers. Five rumen-cannulated Nelore steers were allotted to a 5 x 5 latin square design. The steers were placed in metabolic cages and they were fed with diets with 65% forage (%DM). Five silages were evaluated (wet basis): Control sugar cane, no additives; Urea sugar cane + 0.5% of urea; Benzoate sugar cane + 0.1% of sodium benzoate; LP - sugar cane inoculated with Lactobacillus plantarum (1 x 10(6) cfu/g forage); LB sugar cane inoculated with L. buchneri (3.6 x 10(5) cfu/g forage). During 90 days, before the animal feeding, the forage was stocked in vertical silos. The chemical composition of sugar cane changed after the ensiling, as compared to fresh sugar cane, with reduction of water soluble carbohydrates and in vitro digestibility and relative increase in the NDF and ADF content. Ethanol (0.30% DM) and organic acids (0.99% of lactic and 2.31% of acetic acid) contents were low and similar among silages. The additives applied in the ensiling did not promote alterations in the voluntary intake and apparent digestibility of DM that showed average values of 7.2 kg/day and 63.6%, respectively. The ingestive behavior of the animals also was not altered, with average time spent in feeding, rumination and idleness were: 230.6, 519.6 and 672.8 minutes/day activities, respectively.So, the additives applied in the sugar cane forage resulted in slightly changes in most of the studied variables.
Descrição
Palavras-chave
ácido lático, benzoato de sódio, etanol, Lactobacillus buchneri, Lactobacillus plantarum, uréia, ethanol, lactic acid, Lactobacillus buchneri, benzoate, urea
Como citar
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 36, n. 5, p. 1666-1675, 2007.