Nutritional evaluation of cottonseed meal in high energy performance and carcass characteristics of broilers/Avaliacao nutricional do farelo de algodao de alta energia no desempenho produtivo e caracteristicas de carcacas de frangos de corte

The objective of the research was to determine the chemical and energetic composition of cottonseed meal produced by BUNGE Foods Company, trademark as high energy cottonseed meal (FAAE [R]) and to evaluate its inclusion in the performance of broilers. The chemical, energetic and aminoacidic composition was determined using the total excretion gathering method, with two gathers a day. It was used ferric oxide to mark the beginning and the end of the gathering. The level of inclusion of the food testing in the reference diet was 20%. The performance was evaluated with the inclusion of cottonseed meal in a period of 9 to 42 days. During the first nine days the poultries received pre-initial feed that were common to all birds. From the ninth day, the birds received an experimental diet with substitution levels of 3%, 6%, 9% and 12% inclusion of cottonseed meal. The cottonseed meal presented 95.91% of dry matter, 9.8% of fat, 27% of crude protein, 4.6% of ash, 4.867 kcal [kg.sup.-1] of crude energy, 1.32% of lysine and 0.35% of metionine. The determined value of apparent metabolizable energy corrected to nitrogen was 1.188 kcal [kg.sup.-1]. It was not observed effect in the performance and carcass return of the poultry at 42 days of age. Key words: alternative feed, poultry, digestibility, performance, cottonseed meal, energy value. O trabalho teve como objetivos determinar a composicao quimica e energetica do farelo de algodao produzido pela BUNGE Alimentos S/A, marca registrada como Farelo de algodao de alta energia (FAAE[R]) e avaliar a inclusao deste no desempenho de frangos de corte. Determinou-se a composicao quimica, aminoacidica e energetica (utilizandose o metodo de coleta total de excretas, com duas coletas ao dia). Foi utilizado oxido ferrico para marcar o inicio e o final da coleta. O nivel de inclusao do alimento de teste na racao referencia foi de 20%. O desempenho foi avaliado com a inclusao do farelo de algodao no periodo de nove a 42 dias. Durante os primeiros nove dias, os pintinhos receberam racao pre-inicial comum a todas as aves. A partir do nono dia, as aves foram submetidas a dieta experimental com niveis de 3, 6, 9 e 12% de inclusao do farelo de algodao. O farelo de algodao apresentou 95,91% de materia seca, 9,8% de gordura, 27% de proteina bruta, 4,6% de cinza, 4.867kcal [kg.sup.-1] de energia bruta, 1,32% de lisina e 0,35% de metionina. O valor de energia metabolizavel aparente corrigida para nitrogenio determinado foi 1.188 kcal [kg.s