Torta de mamona na alimentação de cabras em lactação

Abstract

The replacement of soybean meal protein by protein of castor cake in the diet of lactating goats was evaluated. In the experiment, eight multiparous goats were used, with body weight of 44.34 ± 5.3 kg, about 120 days of lactation. As goats were confined and distributed randomly in two 4x4 Latin Squares, with 3 levels of replacement of castor cake: 33, 66 and 100%, in addition to control (0%) in the total diet. The ingredients used were: corn, soybean meal, castor bean meal and Tifton hay, with a voluminous ratio: 50:50 concentrate. The experiment lasted 60 days, with four periods of 15 days, 10 days for the adaptation of the animals and 5 for data collection. For the statistical analysis, the methodology of mixed models was used and the means were compared by orthogonal contrasts. No differences (P> 0.05) were observed for dry matter consumption, crude protein, ethereal extract, neutral detergent fiber, total carbohydrates, non-fibrous carbohydrates and total digestible nutrients. No effect of soybean meal replacement by castor cake (P> 0.05) was observed for apparent digestibility of dry matter, organic matter, crude protein, neutral detergent fiber (NDFD) total carbohydrates non-fibrous carbohydrates and total digestible nutrients. No differences were found between feeding time, rumination and idle. In addition to feed and rumination efficiencies of dry matter and neutral detergent fiber were also affected by substitution levels (P> 0.05). Milk production,milk production corrected to 3.5% fat and milk composition were not influenced by substituition of soybean meal by castor cake. Castor cake can replace soybean mealr up to 100% in the diet of lactating goats.