Levels of Threonine in Diets for Piglets from 6 to 15 kg

Revista Brasileira de Zootecnia

Rodrigues, Nair Elizabeth Barreto¹  Ferreira, Aloísio Soares²  Donzele, Juarez Lopes²  Oliveira, Rita Flávia Miranda de²  Lopes, Darci Clementino²  Rodrigues Filho, Moacir¹ 

[1]Escola Agrotécnica Federal de Santa Tereza, Santa Tereza

[2]Universidade Federal de Viçosa

关键词: amino acid;    initial phase;    performance     IntroduçãoCom o intuito de melhorar a produtividade do rebanho por meio do aumento do número de desmamados/porca/ano;    nas últimas décadas;    a idade de desmama dos leitões reduziu de 60 para entre 17 e 24 dias de idade;   

DOI  :  10.1590/S1516-35982001000800012

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- Seventy five piglets with average initial weight of 5.8 ± .4 kg were used to evaluate the levels of threonine in the diets for piglets from 6 to 25 kg with high genetic potential for lean deposition. A randomized blocks design, with five treatments(threonine levels), five replicates and three animals by experimental unit was used. The treatments consisted of basal diet with 18% crude protein (CP) and 1.108% total lysine, supplemented with five levels of L-threonine, resulting in diets with (0.682, 0.732, 0.782, 0.832, and 0.883% of total threonine. It was observed quadratic variation for average daily weight gain, that increased up to .77% threonine, and for feed intake (FI), that increased up to 0.73% of threonine. Feed:gain ratio, that increased up to 0.82% of threonine, was also influenced by the threonine levels. The true digestible lysine:true digestible threonine ratio, at the level with the best F/G results, was 100:73. It was concluded that for swine from 6 to 15 kg with high genetic potential for lean meat met 0.77% total threonine in the diet for maximum weight gain and 0.82% for the best feed:gain ratio.

【 授权许可】

CC BY-NC