动物营养学报2017，Vol.29Issue(4)：1124-1131,8.DOI:10.3969/j.issn.1006-267x.2017.04.006
5~8周龄京红1号蛋鸡饲粮赖氨酸需要量
Dietary Lysine Requirement for Jinghong Hens from 5 to 8 Weeks of Age
摘要
Abstract
The aim of this study was to determine the dietary lysine ( Lys) optimal requirement for Jinghong laying hens from 5 to 8 weeks of age. Three hundred and sixty Jinghong hens at the end of 4-week-old were randomly allotted to 5 groups with 6 replicates of 12 birds each. The dietary Lys levels were 0.70%, 0.84%, 0.98%, 1.12% and 1.26%, respectively. The experiment lasted for 4 weeks. The results showed that, the av-erage daily gain, body weight at 8 weeks of age and community evenness of hens in 0.84% Lys group were significantly higher than those in 1.26% Lys group ( P<0.05) . Birds fed 0.98% and 1.12% Lys diets had sig-nificantly higher body development, relative to those receiving 1.26% Lys diet (P<0.05). The duodenum weight and jejunum length in both 0.98% and 1.12% Lys groups were significantly higher than those in 0.70%and 1.26% Lys groups ( P<0.05) . The thymus index in 0.84% Lys group was significantly higher than that in 0.98%, 1.12% and 1.26 % Lys groups (P<0.05). The bursa of Fabricious index in 0.84%, 0.98% and 1.12% Lys groups was higher than that in the other groups ( P<0.05) . The serum contents of total protein and albumin in 0.84%, 0.98% and 1.12% groups were significantly higher than those in 0.70% and 1.26% Lys groups (P<0.05). Compared to those receiving 1.26% Lys diet, hens fed 0.98% Lys diet had significantly lower serum contents of uric nitrogen and uric acid (P<0.05). The serum alkaline phosphatase activity and plasma growth hormone content in 0.84% Lys group were significantly higher than those in 0.70% Lys group ( P<0.05) . According to the quadratic regression analysis for final body weight, community evenness, eviscer-ated carcass weight, carcass weight, heart index, liver index, tibial length, duodenum weight and serum uric acid content, the optimal dietary levels of Lys for Jinghong hens were 0.906%, 0.888%, 0.931%, 0.928%, 0.889%, 0.902%, 0.902%, 1.071% and 0.958%, respectively. In conclusion, the dietary optimum level of Lys for Jinghong laying hens of 5 to 8 weeks of age is 0.93%.关键词
赖氨酸/京红1号/生长发育/后备母鸡Key words
lysine/Jinghong hens/growth and development/pullets分类
农业科技引用本文复制引用
王晓翠,武书庚,宋丹,张海军,岳洪源,王晶,齐广海..5~8周龄京红1号蛋鸡饲粮赖氨酸需要量[J].动物营养学报,2017,29(4):1124-1131,8.基金项目
现代农业产业技术体系(CARS-41-K13) （CARS-41-K13）
家禽产业技术体系北京市创新团队(CARS-PSTP) （CARS-PSTP）
