Utilização da torta de algodão na alimentação de caprinos mestiços boer em terminação

Abstract

This study aimed to evaluate the intake, apparent digestibility of nutrients, feeding behavior, qualitative and quantitative characteristics of the carcass and meat, production of volatile fatty acids and rumen morphometry Boer crossbred goats fed cottonseed meai finishing. The experiment was conducted at the Experimental Farm of São Gonçalo dos Campos, belonging to the School of Veterinary Medicine and Zootecnia, December UFBA 2012 to February 2013, was used 32 crossbred goats Boer, with average body weight of 16 ± 2 kg distributed in a completely randomized design (CRD) with four treatments (0%, 33%, 66% and 100% replacement of soybean meai by cottonseed meai) and eight repetitions, with a duration of 84 days of experiment. The reason used was 50:50 roughage Tifton-85 hay and concentrate based on com meai, soybean meai, mineral salt, cottonseed meai and urea, thus providing proper nutrients to a gain of 0.150 kg / day. The amounts of offered feed and remnants were recorded daily in order to determine consumption. The animais were weighed at the beginning of the experiment and the end of the trial period for the productive performance. Chapter I - consumption, apparent digestibility, performance and feeding behavior of Boer crossbred goats fed cottonseed meai. In the evaluation of the nutrient intake ether extract showed a quadratic effect so that increased leveis of substitution of soybean meai by cottonseed meai (.122-, 131), so that the increased replacement leveis soybean meai by cottonseed meai, attributes the increase of this nutrient in the diet (2.32 to 3.68) while the cotton cake has 15.61% of ether extract, in apparent digestibility of nutrients and performance no effect, with CMS (0.778 kg) and ADG (0.100 kg / day). Ingestive behavior was no effect for feeding time (200-271 min / day), feed rate (13.91 to 18.88) and rumination efficiency (398-533 cakes), and increasing linear positive with increasing replacement for soybean meai cottonseed meai. Chapter II - Quantitative and qualitative characteristics of carcass and meat from crossbred goats boer fed cottonseed meai. The quality of the meat is not expressed in the substitution leveis except in ash content and cholesterol in mg / lOOg flesh evaluated, with an increasing and decreasing linear-linear relationship with increasing leveis of replacement for soybean meai cottonseed meai, respectively, the ash averaged 1.06 to 0.96% MS cholesterol and 50 - 70 mg / lOOg flesh attach the ether extract content of diets increased from 2.32 to 3.62, and confirmed with increasing intake of ether extract from animais to levei increased substitution. Chapter III - ruminal morphometry and production of volatile fatty acids in crossbred goats boer fed cottonseed meai. Total replacement of soybean meai by cottonseed meai in diets for crossbred Boer goats can be used in the termination of the animais without compromising the development and animal production