Effect of pre-wilting and different proportions of urea on the chemical composition of oat (Avena Sativa L.) silage

Abstract

This study was conducted with the objective of evaluating the effect of pre-wilting and different amounts of urea on the chemical composition of oat (Avena sativa L.) silage. A completely randomized design with four replications in 2 x 3 factorial design was used, with factors containing state of the original moisture silage (silage immediately after cutting) or wilted (with a period of dehydration in the field of 8h) and 0, 1 and 1.5% of urea based on the natural material. Significant interaction was verified status and urea silage built for media content crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose and pH. It was observed that the average PC content of forage ensiled without wilting increased with increasing doses of urea and a significant reduction in NDF and the values ranged from 8.95 to 17.74% CP, and 49.23 to 44.44% NDF. The decline occurred for NDF and hemicellulose wilted silage with 1% urea. Ratio values hemicellulose- FND in the cell wall at all silages were similar, except for forage wilted silage showed tendency to increase when treated with 1.5%. No consistency was checked as to the pH values in silage not wither with increasing levels of urea. Under the conditions of this study, it may recommend the addition of 1.5% urea to oats without wither the time of ensiling, and 1% urea in oats blighted by promoting significant reduction in the contents of NDF, ADF and hemicellulose.