Valor nutricional de silagem pré-secada de Tifton- 85

Abstract

Forage conservation is a strategy that aims to maintain the nutritional quality of forages and reduce their losses, so that they can be supplied to animals at unfavorable times, where there is generally a low quantity or quality of food available on the farms. The objective of this research was to evaluate the nutritional value of the pre-dried silage of Tifton-85 (Cynodon spp.) With 60% dry matter during storage. The evaluated treatments consisted of storage times 1, 3, 7, 14, 28 and 56 days with four replications. The design was randomized blocks. No differences (P> 0.05) were observed for pre-dry matter, crude protein, ethereal extract, neutral detergent fiber, lignin and in vitro digestibility of DM. There was a variation (P <0.05) in the fiber content of acid detergent, increasing from 28 days, as well as in hemicellulose, however, the latter presented opposite behavior, reducing its concentrations after 14 days. Differences were also observed (P <0.05) for pH, which decreased, while the ammoniacal nitrogen had an increase until last evaluated. No differences were observed in the mycotoxin contents of the plant and silage at 56 days. It was concluded that the pre-dried silage maintained its nutritional values throughout the storage time, obtaining its best nutritional indexes from 28 days, being more appropriate for its use after this period.