Digestible threonine levels in diets for lactating sows of medium genetic potential

Revista Brasileira de Zootecnia

Silva, Francisco Carlos de Oliveira³  Kiefer, Charles¹  Carrijo, Alfredo Sampaio¹  Donzele, Juarez Lopes²  Oliveira, Rita Flávia Miranda de²  Ferreira, Aloizio Soares² 

[1] Universidade Federal de Mato Grosso do Sul, Campo Grande;Universidade Federal de Viçosa, Viçosa;EPAMIG, Viçosa

关键词: amino acids relation;    fat mobilization;    ideal protein;    milk production;    protein mobilization    Introdução Tem-se constatado que dietas contendo inadequada concentração de aminoácidos e energia;    para matrizes suínas na fase de lactação;    podem reduzir a produção de leite e;    conseqüentemente;    o ganho de peso da leitegada (King et al;   

DOI  :  10.1590/S1516-35982007000800010

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

Seventy and six lactating crossbred sows of medium genetic potential with initial weight of 207.0 ± 32.0 kg and reproductive cycles order of 3.53 ± 2.11 were used to evaluate digestible threonine levels in the lactation phase. The animals were allotted to a randomized blocks experimental design with four treatments (0.589, 0.627, 0.665, and 0.703% of digestible threonine) and nineteen replications, in which each experimental unit was onsisted by a female. There was no effect of digestible threonine levels on the weight of sows at weaning time, fat thickness (FT) and corporal protein composition at weaning time. The loss of weight of the sows during the lactation reduced in a linear form with the increase of the digestible threonine level. There was no effect of digestible threonine levels on FT variation during the lactation, however affected the corporal protein mobilization that linearly reduced with the increase of the digestible threonine level. There was no effect of digestible threonine levels on feed intake, lysine and digestible energy, however, was observed linear increase of the intake of digestible threonine with its increase level in the diet. The digestible threonine levels did not influence the energy efficiency of the sows; weaning - estrus interval and the performance of the pigs and litters. Lactating sows of medium genetic potential require 0.589% of digestible threonine, corresponding to daily consumption of 28.5 g and a digestible threonine: digestible lysine ratio of 62%.

【 授权许可】

CC BY-NC