Silagem de dieta total contendo mucilagem de sisal como fonte de forragem | Complete diet silages containing sisal mucilage as a source of forage

The present work aims to produce a total diet silage (STD), using sisal mucilage, as a nutritional strategy for sheep in times of drought. The chemical bromatological characteristics, losses by effluents, losses by gas gases, recovery of dry matter and fractionation of carbohydrates were evaluated. Different levels of wheat bran (0%, 10%, 20%) and urea (0% and 1%) were added to the sisal mucilage, making all combinations possible, totaling 6 treatments and making adjustments for the balance, through the addition of corn and soybean meal. Two types of experimental silos, PVC tubes and polyethylene bags were used. In all treatments, 5 repetitions were performed with each type of silo. The data were submitted to analysis of variance, using the Tukey test, through the System for Statistical Analysis - SAEG®. Significance P <0.05. Diets containing the addition of 20% of wheat showed higher values of PB and EE, but diets with the lowest values of PB and diets containing the highest values of EE are still within the desired range. Similar behavior occurred with the NDFcp, LIG, HEM and CEL variables, showing higher values when added with 20% wheat. The values found for PPG, PPE and RDMS losses did not show statistical difference. After the carbohydrate fractionation analysis, a higher amount of the A + B1 fraction was identified. After interpreting the results, it is suggested that all the diets elaborated are within the desirable standard for a nutritional quality silage.

Este trabalho teve como objetivo desenvolver silagens de dieta total utilizando mucilagem de sisal como alternativa forrageira para ovinos em períodos de seca. Foram avaliadas as características químico-bromatológicas, perdas por gases e efluentes, recuperação da matéria seca e fracionamento de carboidratos. Foram testadas combinações com diferentes níveis de farelo de trigo (0%, 10%, 20%) e ureia (0% e 1%), totalizando seis tratamentos, com ajustes feitos por meio da adição de milho e farelo de soja. Dois tipos de silos experimentais foram utilizados: tubos de PVC e sacos de polietileno, com cinco repetições cada. Os dados foram analisados por ANOVA e teste de Tukey (P<0,05). As dietas com 20% de farelo de trigo apresentaram maiores teores de proteína bruta (PB) e extrato etéreo (EE), mantendo-se dentro dos padrões desejáveis. O fracionamento dos carboidratos indicou predominância da fração A+B1. Conclui-se que todas as dietas elaboradas atendem aos critérios nutricionais para uma silagem de qualidade.