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Foram realizados dois ensaios de metabolismo a fim de determinar a energia metabolizável aparente (EMA), por meio do método de coleta total de excretas com frangos, e a energia metabolizável verdadeira (EMV) e a digestibilidade verdadeira dos aminoácidos do farelo de girassol, por meio do método de alimentação forçada com galos cecectomizados. No primeiro ensaio, foi utilizado o delineamento experimental inteiramente ao acaso com 80 frangos Cobb, distribuídos em dois tratamentos, ração referência (RR) e RR mais 20% de inclusão de farelo de girassol e oito repetições e cinco aves por unidade experimental. No segundo ensaio, foi utilizado o delineamento experimental inteiramente ao acaso com 14 galos Leghorn, distribuídos em dois tratamentos, farelo de girassol e jejum, sete repetições e um galo por unidade experimental. O farelo de girassol apresentou 90,0% de matéria seca, 28,1% de proteína bruta, 4.42kcal/kg de energia bruta, 22,4% de fibra bruta, 2,9% de extrato etéreo, 0,8% de fósforo e 0,3% de cálcio. A EMV, a EMV corrigida, a EMA e a EMA corrigida determinadas foram 3.013; 2.200; 2.141 e 1.983kcal/kg, respectivamente. A lisina foi o aminoácido essencial que apresentou a menor digestibilidade e a arginina, a maior. Two experiments were carried out to determine apparent metabolizable energy (AME), by the method of total excreta collection using broilers; and true metabolizable energy (TME) and true amino acid digestibility of sunflower meal (SFM), by the method of forced feeding using cecectomized roosters. In the first experiment, a completely randomized experimental design, with two treatments (reference diet (RD) and RD plus 20% SFM inclusion) with eight replicates of five birds each, was applied. In the second experiment, a completely randomized experimental design, with two treatments (SFM vs. fasting) with seven replicates of one rooster each, was used. Sunflower meal presented 90,0% dry matter, 28.1% crude protein, 4,429kcal/kg crude energy, 22.4% crude fiber, 2.9% ether extract, 0.8% phosphorus, and 0.3% calcium. TME, nitrogen-corrected TME, AME, and nitrogen-corrected AME were: 3,013; 2,200; 2,141; and 1,983 kcal/kg, respectively. Lysine was the essential amino acid that presented the lowest digestibility, and arginine, the highest. It is important to constantly upgrade energy and nutrient values of feedstuffs used in feed formulation to supply poultry nutritional requirements

Avaliação nutricional e energética do farelo de girassol para aves