摘要
本试验旨在探讨饲粮中添加二十二碳六烯酸(DHA)对产蛋后期脂肪肝出血综合征(FLHS)蛋鸡生产性能、蛋品质和肝脏功能的影响。选用240只71周龄海兰褐蛋鸡,随机分为3组,每组8个重复,每个重复10只鸡。对照组饲喂基础饲粮,高能量低蛋白质组(HELD组)饲喂高能量低蛋白质饲粮(基础饲粮中添加5%鸡油),DHA组饲喂含DHA的高能量低蛋白质饲粮(高能量低蛋白质饲粮中将1%豆油替换为1%DHA)。试验期12周。结果表明:1)与对照组相比,HELD组产蛋率和平均日采食量显著降低(P<0.05)。与HELD组相比,DHA组产蛋率显著提高(P<0.05)。2)与对照组相比,HELD组第8周蛋壳黄度(b*)值、蛋壳强度、蛋壳重量、蛋壳厚度显著下降(P<0.05)。与HELD组相比,DHA组第8周蛋壳强度、蛋壳重量和蛋壳厚度以及第12周蛋壳厚度显著提高(P<0.05)。3)与对照组相比,HELD组肝脏重量、肝脏颜色、腹脂重量和腹脂指数显著提高(P<0.05)。与HELD组相比,DHA组胰腺重量和胰腺指数显著降低(P<0.05)。4)与HELD组相比,DHA组大黄卵泡个数显著提高(P<0.05),生殖道长度显著降低(P<0.05)。5)与对照组相比,HELD组肝脏甘油三酯(TG)和总胆固醇(TC)含量显著提高(P<0.05)。与HELD组相比,DHA组肝脏TC含量显著下降(P<0.05)。综上所述,饲粮中添加DHA可缓解FLHS引起的蛋鸡产蛋率下降,改善蛋品质,缓解FLHS对蛋鸡生产性能的不利影响。
The aim of this study was to investigate the effects of dietary docosahexaenoic acid(DHA)on performance,egg quality and liver function of laying hens with fatty liver hemorrhage syndrome(FLHS)during late laying period.A total of 240 Hy-Line Brown laying hens at 71 weeks of age were randomly assigned to 3 groups with 8 replicates per group and 10 hens per replicate.The control group was fed a basal diet,the high-energy and low-protein group(HELD group)was fed a high-energy and low-protein diet(the basal diet supplemented with 5%chicken oil),and the DHA group was fed a high-energy and low-protein diet containing DHA(replaced 1%soybean oil with 1%DHA in the high-energy and low-protein diet).The experiment period was 12 weeks.The results showed as follows:1)compared with the control group,the laying rate and average daily feed intake of the HELD group were significantly decreased(P<0.05).Compared with the HELD group,the laying rate of the DHA group was significantly increased(P<0.05).2)Compared with the control group,the eggshell yellowness(b*)value,eggshell strength,eggshell weight and eggshell thickness on week 8 and the eggshell thickness on week 12 of the HELD group were significantly decreased(P<0.05).Compared with the HELD group,the eggshell strength,eggshell weight,and eggshell thickness on week 8 and the eggshell thickness on week 12 of the DHA group were significantly increased(P<0.05).3)Compared with the control group,the liver weight,liver color,abdominal fat weight and abdominal fat index of the HELD group were significantly increased(P<0.05).Compared with the HELD group,the pancreatic weight and pancreatic index of the DHA group were significantly decreased(P<0.05).4)Compared with the HELD group,the big yellow follicle number of the DHA group was significantly increased(P<0.05),and the genital tract length was significantly decreased(P<0.05).5)Compared with the control group,the contents of triglycerides(TG)and total cholesterol(TC)in liver of the HELD group were significantly increased(P<0.05).Compared with the HELD group,the liver TC content of the DHA group was significantly decreased(P<0.05).In conclusion,dietary DHA can mitigate the decline in laying rate induced by FLHS,enhance the egg quality,and alleviate the adverse effects of FLHS on the performance of laying hens.
作者
蒋海云
陈静龙
裴碧璇
崔小燕
施寿荣
JIANG Haiyun;CHEN Jinglong;PEI Bixuan;CUI Xiaoyan;SHI Shourong(College of Animal Science and Technology,Yangzhou University,Yangzhou 225009,China;Jiangsu Institute of Poultry Sciences,Yangzhou 225125,China)
出处
《动物营养学报》
北大核心
2025年第9期5886-5896,共11页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金-青年科学基金项目(32202711)
扬州市科技计划项目-创新能力建设计划项目-市级重点实验室(YZ2024242)。
关键词
DHA
脂肪肝出血综合征
蛋鸡
生产性能
蛋品质
DHA
fatty liver hemorrhage syndrome
laying hens
performance
egg quality
