Variação da qualidade da silagem de grão úmido em condições extremas de temperatura ambiente.

Abstract

Moisture grain silage represents a food with better enzymatic digestion of the starch for the animal. However, the mechanism that explains the most available food it is not still very clear, could be inferred a possible effect of physical parameters (temperature, pressure) and chemical (organic acids). So, in order to study the physical parameters contribution, an experiment was carried out to monitor corn silage temperature, inside plastic recipients, at two extremes ambient temperature conditions: 5°C and 40°C. To determine the effects on available starch, it was conducted analysis to evaluate fermentation quality and nutritive value (moisture content, pH, organic acids profile, total starch and granulometry). It was used variance analysis in completely randomized outline, with three repetitions. The results indicated trend to better quality characteristics to 40°C treatment, however, without significant difference for organic acids profile. The effect of ambient temperature was observed on fermentation speed, showing it was faster to moisture corn silage submitted at 40°C.