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zilah cláudia alves da costa braga efeito da inclusão do ... - Ufersa

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CAPÍTULO IIIAvaliação <strong>da</strong> digestibili<strong>da</strong>de de nutrientes, em ovinos, alimenta<strong>do</strong>s com dietasconten<strong>do</strong> níveis crescentes de <strong>inclusão</strong> <strong>do</strong> farelo de coco.RESUMOA maneira mais eficaz de comprovação <strong>do</strong> valor alimentar é através <strong>da</strong> determinação <strong>da</strong>digestibili<strong>da</strong>de de seus nutrientes, pois dela, provem a capaci<strong>da</strong>de <strong>do</strong> animal em manter suasfunções vitais, necessi<strong>da</strong>des energéticas e formação <strong>do</strong>s produtos afins. Este estu<strong>do</strong> foirealiza<strong>do</strong> com o objetivo de avaliar a digestibili<strong>da</strong>de de nutrientes por ovinos alimenta<strong>do</strong>scom dietas com níveis crescentes de farelo de coco, enfatizan<strong>do</strong> a utilização destesubproduto na alimentação de ruminantes. Foram utiliza<strong>do</strong>s oito ovinos machos com i<strong>da</strong>deentre seis e dez meses, instala<strong>do</strong>s em gaiolas de metabolismo, com água a vontade ealimenta<strong>do</strong>s com as dietas experimentais com diferentes níveis de farelo de coco (0,0; 6,0;12,0; 18,0%). O planejamento estatístico foi em blocos casualiza<strong>do</strong>s e as análises estatísticascom as respectivas equações de regressão foram feitas pelo programa SISVAR 3.0. Nãohouve diferença significativa (P>0,05%) quanto aos coeficientes de digestibili<strong>da</strong>de <strong>da</strong>matéria seca (MS), proteína bruta (PB), matéria orgânica (MO), energia, hemicelulose(HEM), conteú<strong>do</strong> celular (CC), carboidratos não fibrosos (CNF) e nutrientes digestíveistotais (NDT). Em relação ao coeficiente de digestibili<strong>da</strong>de <strong>do</strong> extrato etéreo (EE), à medi<strong>da</strong>que se incluiu o subproduto na ração aumentou a digestibili<strong>da</strong>de deste parâmetro. Oscoeficientes de digestibili<strong>da</strong>de <strong>da</strong> FDN e FDA decresceram à medi<strong>da</strong> que se fez a <strong>inclusão</strong><strong>do</strong> subproduto <strong>do</strong> coco. A <strong>inclusão</strong> afetou negativamente a digestibili<strong>da</strong>de.Palavras chaves: Digestibili<strong>da</strong>de, subproduto, farelo de coco.ABSTRACTThe most effective way of proof the alimentary value is through the digestibilitydetermination of their nutrients, because that we can prove the capacity of the animal inmaintaining their vital functions, energy needs and formation of the similar products. Thisstudy was accomplished with the objective of evaluating the digestibili<strong>da</strong>de coefficient ofnutrients by sheep, fed diet with increasing levels of coconut crumb, emphasizing the use ofthis by-product in the feeding for ruminant. Eight male sheep were used between six and tenmonths old, installed in metabolism cages, with water and fed with rations with differentlevels of coconut crumb (0,0; 6,0; 12,0; 18,0%). The statistical planning was in ran<strong>do</strong>mizedblocks and the statistical analyses with the respective equations were <strong>do</strong>ne by the SISVAR3.0 program. There was not significant difference (P>0,05%) in digestibility coefficients ofdry matter (DM), crude protein (CB), organic matter (OM), energy, hemicelulose (HEM),cellular content (CC), no fibrous carbohydrates (NFC) and total digestible nutrient (TND).In relation to digestibility coefficient of ether extract (EE), as the by-product was included inthe ration, increased the digestibility coeficient of this parameter. The digestibilitycoefficients of ADF and NDF decreased as it was made the inclusion of the by-product ofthe coconut. The inclusion affected the digestibility coefficient negatively.Key words: Digestibility, by-product, coconut crumb.52

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