动物营养学报2019，Vol.31Issue(1)：148-158,11.DOI:10.3969/j.issn.1006-267x.2019.01.020
产蛋鸡低蛋白质饲粮中标准回肠可消化总含硫氨基酸与赖氨酸比例研究
Standard Ileum Digestible Total Sulfur Amino Acids to Lysine Ratio in Low Protein Diet for Laying Hens
摘要
Abstract
The experiment was conducted to evaluate the optimal total sulfur containing amino acid (TSAA) to lysine (Lys) ratio (TSAA/Lys) for laying hens fed low protein diets under standard ileal digestible amino acid (SID AA) pattern.Five hundred and forty Jinghong laying hens aged 30 weeks with 92％ uniformity were randomly divided into 6 groups with 6 replicates containing 15 hens each.The corn-soybean meal was used in the experiment and the crude protein level was 16.5％ as a common level in the control group with 91％ TSAA/Lys, while the crude protein level (constant Lys content and increasing level of methionine) was 13.5％ as a low level in the experimental groups with 85％, 88％, 91％, 94％ and 97％ TSAA/Lys, respectively.The experiment lasted for 10 weeks after 1 week adaption.The result showed as follows:1) under the SID AA pattern, average daily feed intake, egg production, average daily egg mass and average egg weight in the low protein group were significantly lower than those in the control group in each stage (P<0.05) .The egg production was significantly increased with the TSAA/Lys increasing in the whole stage (P<0.05) , which was the highest when the TSAA/Lys was 91％.The indices of egg quality and egg composition had no significant differences between the control group and the low protein group (P>0.05) , but the yolk color in the low protein group was significantly deepened compared with the control group (P<0.05) .The Haugh unit in the low protein group showed quadratic curve changes with the TSAA/Lys increasing (P<0.05) .Compared with the control group, the plasma uric acid content of hens in the low protein group was significantly lower (P <0.05) , and the plasma urea nitrogen content of hens in the low protein group tended to be lower (0.05≤P<0.10) .Higher plasma total protein content and lower contents of plasma uric acid and uric nitrogen were observed in the chickens fed diets with TSAA/Lys at 88％ to 94％ in the low protein group.2) According to quadratic curve estimation based on egg production, the ratio of feed to egg and average daily egg mass, the optimal TSAA/Lys allowance for laying hens was 90.15％, 91.61％ and 90.31％, respectively, which could be averaged to 90.69％.In conclusion, under the SID AA pattern, the optimal TSAA/Lys allowance for Jinghong laying hens of 30 to 40 weeks of age is 90.69％ in the low protein diet.关键词
低蛋白质饲粮/标准回肠可消化氨基酸/总含硫氨基酸/赖氨酸/京红蛋鸡Key words
low protein diet/standard ileal digestible amino acid/total sulfur-containing amino acid/lysine/Jinghong laying hen分类
农业科技引用本文复制引用
郭丹,王晶,齐广海,张涛,高俊,张海军,武书庚..产蛋鸡低蛋白质饲粮中标准回肠可消化总含硫氨基酸与赖氨酸比例研究[J].动物营养学报,2019,31(1):148-158,11.基金项目
国家科技支撑计划项目 (2014BAD13B04) （2014BAD13B04）
北京市家禽创新团队 (BAIC04-2018) （BAIC04-2018）
现代农业产业技术体系 (CARS-40-K12) （CARS-40-K12）
