动物营养学报2019，Vol.31Issue(1)：159-166,8.DOI:10.3969/j.issn.1006-267x.2019.01.021
低粗蛋白质饲粮中补充限制性氨基酸对大午金凤蛋鸡育雏期生长性能和氮排放量的影响
Effects of Supplementing Limiting Amino Acids in Low Crude Protein Diets on Growth Performance and Nitrogen Emission of Dawu Golden Phoenix Laying Hens during Incubation Period
摘要
Abstract
The purpose of this study was to investigate the effects of supplementing limiting amino acids in low crude protein diets on growth performance and nitrogen emission of Dawu Golden Phoenix laying hens during the incubation period.A total of 384 one-day-old Dawu Golden Phoenix laying hens were randomly divided into4 groups with 6 replicates in each group and 16 hens in each replicate.Based on the limiting amino acid content in control group, dietary crude protein levels in other groups were decreased, and added limiting amino acids (methionine, lysine and threonine) to achieve crude protein levels of 20.02％, 19.39％, 18.44％ and17.36％ (measured value) .The other nutrition levels in the diets meet the requirements of NY/T 33-2004.The trial lasted for 6 weeks (1 to 6 weeks of age) , and from the end of 6 weeks of age, an observation period lasted until 20 weeks of age.The results showed as follows:1) the average daily feed intake, average daily gain and final body weight of 18.44％ and 17.36％ crude protein groups had no significant difference (P>0.05) , but were significantly higher than those of 20.02％ crude protein group (P<0.05) except for average daily feed intake of 18.44％ crude protein group.As dietary crude protein levels decreased, supplementing limiting amino acids linearly increased the average daily feed intake, average daily gain and final body weight (P<0.05) , but there was no significant difference between the 20.02％ and 19.36％ crude protein groups (P>0.05) .The 18.44％ crude protein group had the best body weight uniformity.During the observation period, the body weight of 18.44％ crude protein group had been at the top of the list.2) The length of the jejunum and ileum of 18.44％ crude protein group was significantly higher than that of 20.02％ crude protein group, but there was no significant difference of 17.36％ crude protein group (P>0.05) .3) The apparent retention rate of crude protein in 18.44％ crude protein group was significantly higher than that of 20.02％ and 19.39％ crude protein groups (P< 0.05) .The nitrogen emission rate and nitrogen emission of 18.44％ crude protein group were significantly lower than those of 20.02％ crude protein group (P<0.05) .Considering the growth performance and nitrogen emission, reducing dietary crude protein levels and supplementing limiting amino acids not only facilitate the growth but also improve nitrogen utilization.关键词
低粗蛋白质饲粮/大午金凤蛋鸡/限制性氨基酸/生长性能/氮排放Key words
low crude protein diet/Dawu Golden Phoenix laying hens/limiting amino acids/growth performance/nitrogen emission分类
农业科技引用本文复制引用
耿顺菊,张晓怡,张建云,赵丽红,计成,马秋刚..低粗蛋白质饲粮中补充限制性氨基酸对大午金凤蛋鸡育雏期生长性能和氮排放量的影响[J].动物营养学报,2019,31(1):159-166,8.基金项目
国家蛋鸡产业技术体系 (CARS-40-K08) （CARS-40-K08）
