Estratégias para criação de cordeiros confinados e aspectos nutricionais da silagem de palma com guandu

Abstract

The objective of this study was to evaluate the effects of the cactus harvest season and the inclusion of different levels of pigeon pea hay on improving the ensiling process and the nutritional composition of cactus silage. 40 polyvinyl chloride-PVC mini silos measuring 10 cm in diameter and 40 cm in height were used. The lids of the mini silos equipped with Bunsen were distributed in a 2 × 5 factorial scheme, with the factors represented by two cladode harvesting times (18 vs 24 months) and five levels (0, 10%, 20%, 30%, and 40 %) of inclusion of pigeon pea hay in cactus silage, in a randomized design. Effluent losses (kg/ton; p < 0.001) had a negative linear effect, bringing 4.31 kg/ton as the inclusion of pigeon peas increased. On the other hand, gas losses (%; p < 0.001), DM recovery (p < 0.001) and pH (p < 0.001) revealed interactive effects between the inclusion level of pigeon pea and the harvest time of the giant palm. (18 x 24 months). In this sense, the DM and CNF content was higher in giant forage cactus harvested at 24 months than in cactus harvested at 18 months. In the silage fermentation process, homofermentative bacteria produce lactic acid without loss of DM. The difference in nutritional composition promoted by the harvest age of giant forage cactus was not proven to result in significant changes in silage quality. The gradual inclusion of Guandú bean hay improved the fermentative and bromatological characteristics of palm silage. It is important to highlight that the increase in the inclusion level of pigeon pea hay contributed to the increase in pH, however the silages had the acidity necessary for their conservation.