Uso de silagem de palma em dietas para ovinos

Abstract

The objective of this work was to evaluate the effect of diets with in natura cactus pear and cactus pear silage on feeding confinement sheep. The experiment was carried out during the months of November and December of 2017 at the Fazenda Experimental Pendência - Empresa de Pesquisa Agropecuária da Paraíba SA (EMEPA). Twenty uncastrated lambs with no defined racial pattern (SPRD) were used with mean initial body weight of 17 kg, distributed in a completely randomized design (DIC), with four treatments proposed, in order to obtain five replicates per treatment. The diets were composed of a complete diet containing concentrate ratio: 35:65 roughage, based on dry matter (DM), where the roughage was composed of cactus pear (Opuntia ficus-indica), hay of tifton grass, and food concentrates: soybean meal, corn bran, urea, mineral nucleus, ammonium chloride and sulfate. The treatments used were: in natura cactus pear processed at the time of supply (PF1); in natura cactus pear processed in the morning (PF2); cactus pear silage without inoculant (SP); cactus pear silage with microbial inoculant (SPI). There was no effect of the diets on the consumption of nutrients, dry matter and total digestible nutrients, except for ethereal extract. The animals consuming cactus pear silage without inoculant had higher consumption of ethereal extract than the animals consuming in natura cactus pear. The use of in natura cactus pear processed at the time of supply of the animals and the cactus pear in the form of silage in diets for sheep showed better nutritive value than the in natura cactus pear processed in the morning to be offered throughout the day. There was no significant difference between the digestibility of CP (824.82 g / kg), EE (878.82 g / kg) and NDF (815.42 g / kg). However, there were significant differences (P <0.05) for dry matter (DM), organic matter (OM), non-fibrous carbohydrate (CNF) and total digestible nutrients (TDN). The digestibility of dry matter and organic matter showed the same behavior among diets, and the diet with cactus pear silage without inoculant had higher digestibility than the diets with in natura cactus pear processed in the morning. The use of in natura cactus pear processed at the time of supply of the animals and the cactus pear in the form of silage in diets for sheep showed better nutritive value than the in natura cactus pear processed in the morning to be offered throughout the day.