苜蓿多糖对夏季高温环境下蛋鸡生产性能及蛋品质的影响

发布时间：2018-02-15 19:05

本文关键词： 苜蓿多糖蛋鸡高温生产性能蛋品质　出处：《动物营养学报》2017年06期 　论文类型：期刊论文

【摘要】：本试验旨在研究夏季高温环境下在饲粮中添加苜蓿多糖对蛋鸡生产性能及蛋品质的影响。将540只156日龄海兰褐蛋鸡随机分成6组,每组6个重复,每个重复15只鸡。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加250、500、1 000、2 000和4 000 mg/kg苜蓿多糖的试验饲粮。试验期为6周。结果显示:与对照组相比,1)饲粮中添加不同水平苜蓿多糖对平均蛋重、平均日采食量、不合格蛋率和死淘率均无显著影响(P0.05),而添加500、1 000和4 000 mg/kg苜蓿多糖显著提高了蛋鸡的产蛋率(P0.05),添加500、1 000、2 000和4 000 mg/kg苜蓿多糖显著降低了料蛋比(P0.05)。2)饲粮中添加不同水平苜蓿多糖对蛋白高度和哈夫单位均无显著影响(P0.05);250 mg/kg苜蓿多糖添加组第4和6周末的蛋黄颜色显著提高(P0.05);500 mg/kg苜蓿多糖添加组第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05);1 000 mg/kg苜蓿多糖添加组第4和6周末的蛋壳颜色显著加深(P0.05),第1、2和4周末的蛋壳强度和蛋壳厚度显著提高(P0.05),第1和6周末的蛋形指数显著降低(P0.05),第1、2、4和6周末的蛋黄颜色显著提高(P0.05);2 000 mg/kg苜蓿多糖添加组第1和4周末的蛋壳厚度显著提高(P0.05),第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05);4 000 mg/kg苜蓿多糖添加组第4周末的蛋壳颜色显著加深(P0.05)且蛋壳强度显著提高(P0.05),第1和4周末的蛋壳厚度显著提高(P0.05),第6周末的蛋形指数显著降低(P0.05),第1、4和6周末的蛋黄颜色显著提高(P0.05)。结果表明,夏季高温环境下,在饲粮中添加适量的苜蓿多糖可以有效缓解蛋鸡的热应激,提高蛋鸡的生产性能,改善蛋品质,且适宜添加量为1 000 mg/kg。
[Abstract]:The purpose of this study was to study the effects of alfalfa polysaccharides on the performance and egg quality of laying hens in high temperature environment in summer. 540 Hailan brown laying hens aged 156 days were randomly divided into 6 groups with 6 replicates in each group. The control group was fed with basic diet. The experimental group was fed with 2 000 and 4 000 mg/kg alfalfa polysaccharides in the basal diet. The experimental period was 6 weeks. The results showed that the average egg weight and average daily intake of alfalfa polysaccharides were increased by adding different levels of alfalfa polysaccharides to the diet compared with the control group. The percentage of unqualified eggs and the rate of dead scouring had no significant effect on P0.05, but addition of 5000.000 and 4,000 mg/kg alfalfa polysaccharides significantly increased the laying rate of laying hens, and the addition of 5000.000 and 4,000 mg/kg of alfalfa polysaccharides significantly decreased the ration of feed and egg to feed and egg ratio (P0.05 路2). There was no significant effect of alfalfa polysaccharides on protein height and Haff unit. The egg yolk color of alfalfa polysaccharides supplemented with P0.05A250 mg/kg at the end of the 4th and 6th week significantly increased the egg shape index of P0.05 mg/kg alfalfa polysaccharides added group at the end of the 6th week, and the egg shape index decreased significantly at the end of the 6th week. The yolk color at the 4th and 6th weekend significantly increased the eggshell color of the P0.05 mg/kg alfalfa polysaccharides supplementation group at the 4th and 6th weekend, and the eggshell strength and shell thickness at the 1st and 4th weekend significantly increased the egg shape at the 1st and 6th weekend. The egg yolk color increased significantly at the end of the 1st and 6th weekend, and the egg shell thickness increased significantly at the 1st and 4th weekend of the alfalfa polysaccharide supplementation group. The egg shape index decreased significantly at the end of the 6th week, and at the end of the 1st and 6th weeks, the egg shape index decreased significantly. The egg shape index increased significantly at the end of the 1st and the 6th weeks of the trial, and at the end of the 1st and the 6th weeks, the eggshell thickness of the alfalfa polysaccharides supplementation group was significantly higher than that of the control. The yolk color was significantly increased in P0.05 mg/kg alfalfa polysaccharides supplementation group (P0.05) and the eggshell strength was significantly increased at the end of the 4th week. The eggshell thickness increased significantly at the 1st and 4th weekend, and the egg shape index decreased significantly at the 6th weekend. The color of egg yolk increased significantly at the end of the 1st and 6th weeks. The results showed that the egg yolk color increased significantly at the end of the 1st and 6th weeks. Under high temperature environment in summer, adding alfalfa polysaccharides to diet could effectively relieve heat stress, improve performance and improve egg quality of laying hens, and the appropriate amount of alfalfa polysaccharides was 1 000 mg / kg.
【作者单位】：中国农业科学院北京畜牧兽医研究所;
【基金】：“十二五”国家科技支撑计划课题(2013BAD10B04) 国家蛋鸡产业技术体系建设专项经费(CARS-41-K16) 中国农业科学院科技创新工程(ASTIP-IAS08)
【分类号】：S831.5

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