动物营养学报2016，Vol.28Issue(4)：1060-1067,8.DOI:10.3969/j.issn.1006-267x.2016.04.013
蛋鸭产蛋高峰期色氨酸适宜需要量
Tryptophan Optimal Requirement for Laying Ducks in Peak Laying Period
摘要
Abstract
This experiment aimed to investigate the effects of dietary tryptophan level on laying performance, egg quality, body antioxidant parameters and slaughter parameters of laying ducks, and to evaluate tryptophan requirement of ducks during the peak laying period. Nine hundred 120-day-old Shanma ducks were randomly assigned into 6 groups with 6 replicates per group and 25 ducks per group. Ducks in the 6 groups were fed the experimental diets which tryptophan levels were 0.12%, 0.16%, 0.20%, 0.24%, 0.28% and 0.32%, respec-tively. The experiment lasted for 20 weeks. The results showed as follows:1) dietary tryptophan level had no significant effects on egg production, average egg weight, daily egg mass, feed/egg and so on ( P>0.05) , but the egg production and daily egg mass in the 0.20% group had the highest value. Dietary tryptophan level had no significant effects on egg quality such as eggshell strength, Haugh unit, yolk weight, yolk percentage, egg-shell weight, eggshell percentage and thickness (P>0.05), whereas, dietary tryptophan level had significant effect on yolk color ( P<0.05) , and the yolk color in 0.20% group significantly lower than that in other groups ( P<0.05) . 2) Dietary tryptophan level had no significant effect on the content of albumin, total protein, uric acid in serum ( P>0.05) . 3) Dietary tryptophan level had no significant effect on serum and liver antioxidant parameters except liver total superoxide dismutase activity ( P>0.05) . 4) Dietary tryptophan level had no sig-nificant effect on oviduct weight, oviduct length and ovary weight ( P>0.05) . Based on the broken-line mod-el, dietary 0.20% tryptophan level is recommended for egg production in peak laying ducks.关键词
蛋鸭/色氨酸/产蛋性能/蛋品质/抗氧化Key words
laying ducks/tryptophan/laying performance/egg quality/antioxidant parameters分类
农业科技引用本文复制引用
张罕星,陈伟,李燕,王爽,阮栋,余德谦,王胜林,郑春田,林映才..蛋鸭产蛋高峰期色氨酸适宜需要量[J].动物营养学报,2016,28(4):1060-1067,8.基金项目
现代农业产业技术体系建设专项资金资助( CARS-43-13) （ CARS-43-13）
广东省畜禽育种与营养研究重点实验室运行经费 （）
