Nutritional requirement of digestible lysine for broiler chickens

Revista Brasileira de Zootecnia

Rostagno, Horacio Santiago¹  Albino, Luiz Fernando Teixeira¹  Barboza, Walter Amaral³  Rodrigues, Paulo Borges² 

[1] Universidade Federal de Viçosa, Viçosa;Universidade Federal de Lavras, Lavras;Universidade Federal Rural de Pernambuco, Recife

关键词: broiler;    digestible lysine;    nutritional requirement;    rooster    IntroduçãoA exigência nutricional de lisina total para frangos de corte tem sido estudada por diferentes autores (SURISDIARTO e FARRELL;    1991;    WALDROUP;    1993;    e BILGILI et al;   

DOI  :  10.1590/S1516-35982000000400021

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- The objective of this work was to determine, through a digestibility assay, the nutritional requirement of true digestible lysine for broiler chickens, in the four growing phases. Four performance experiments, previously performed, allowed the determination of total lysine requirement of broiler chickens in the periods from 1 to 21, 15 to 40, 22 to 40 and 42 to 48 days of age. Thirty cecectomized adults Leghorn roosters were used, with an average weight of 2316±190 g, and individually caged in batteries with excreta collecting trays and using the precision feeding method. A completely randomized design was used, with five treatments (four with diets and one fasted) and six replications. The basal diets from the four growing phases, contained 1.0, 0.825, 0.80 and 0.75% total lysine, were used. Based on the determined digestibility coefficients of 93.3; 93.58; 89.76 and 92,25% and considering the supplemented L-Lysine HCL as 100 % digestible, the true digestible lysine requirements were: 1.130%; 1.075%; 0,95% and 0,84% for 1-21; 15- 40; 22-40 and 42-48 days of age, respectively. Using the linear regression model, the obtained equations were(%total lysine/Mcal) = 0.4335 - 0,003284X R2 0.98 and(% digestible lysine/Mcal) = 0,41081 - 0,003213X, R2 0.96 for total and digestible lysine, respectively, where x was the average birds age in days.

【 授权许可】

CC BY-NC