摘要
试验旨在探究褪黑素对产蛋末期蛋鸡产蛋性能和蛋品质的影响。选取520日龄的罗曼褐蛋鸡1800只,随机分为5组,每组6个重复,每个重复60只蛋鸡。对照组饲喂基础饲粮,试验组在基础饲粮中分别添加0.5、1.0、1.5和2.0 mg/kg的褪黑素。预试期1 w,正式试验期4 w。结果显示,与对照组相比,添加褪黑素后蛋鸡的产蛋率显著提高(P<0.05)。1.0 mg/kg组、1.5 mg/kg组和2.0 mg/kg组的平均蛋重显著提高(P<0.05),料蛋比和破蛋率显著降低(P<0.05)。1.0 mg/kg组和1.5 mg/kg组的蛋壳强度显著提高(P<0.05)。添加0.5~1.5 mg/kg褪黑素蛋鸡促黄体生成素(LH)、促卵泡激素(FSH)和钙离子(Ca^(2+))含量显著提高(P<0.05)。当褪黑素添加量为1.0 mg/kg时,LH含量提高了46.90%,FSH含量提高了59.13%,Ca^(2+)含量增加了47.55%,LH和FSH基因的相对表达量最高(P<0.05),是对照组的2倍以上。研究表明,添加褪黑素对维持产蛋末期蛋鸡产蛋率和提升蛋品质具有积极作用,褪黑素的最适添加水平为1.0 mg/kg。
The experiment aimed to investigate the effects of melatonin on the laying performance and egg quality in late-phase laying hens.A total of 1800520-day-old Lohmann Brown layers were randomly divided into five groups,with six replicates per group and 60 hens per replicate.The control group was fed a basal diet,while the experimental groups were fed a basal diet supplement with 0.5,1.0,1.5,and 2.0 mg/kg of melatonin,respectively.The pre-test period was one week and the formal test period was four weeks.The results showed that compared with the control group,the laying rate of hens added with melatonin was significantly increased(P<0.05).The average egg weight of 1.0 mg/kg,1.5 mg/kg and 2.0 mg/kg groups was significantly increased(P<0.05),while the feed-to-egg ratio and broken egg rate were significantly decreased(P<0.05).The eggshell strength of 1.0 mg/kg and 1.5 mg/kg groups was significantly increased(P<0.05).After adding 0.1 to 1.5 mg/kg melatonin,the concentrations of luteinizing hormone(LH),folliclestimulating hormone(FSH),and calcium ion(Ca^(2+))of laying hens were significantly increased(P<0.05).When the dosage of melatonin was 1.0 mg/kg,LH content increased by 46.90%,FSH content increased by 59.13%,Ca^(2+)content increased by 47.55%,and the relative expression of LH and FSH were the highest(P<0.05),exceeding which was more than twice that of the control group.The results indicate that melatonin supplementation has a positive effect on maintaining the laying rate and improving egg quality of laying hens at ate-phase laying,and the optimal supplemental level of melatonin is 1.0 mg/kg.
作者
张震
张苗蕊
杨朋坤
孙玉姣
郭宏伟
赵绪永
郑鸣
王永芬
ZHANG Zhen;ZHANG Miaorui;YANG Pengkun;SUN Yujiao;GUO Hongwei;ZHAO Xuyong;ZHENG Ming;WANG Yongfen
出处
《饲料研究》
北大核心
2025年第12期43-47,共5页
Feed Research
基金
河南省重大专项(项目编号:221100110200)
河南省科技攻关项目(项目编号:242102111003、242102111005、232102110084、252102111008)。
关键词
褪黑素
蛋品质
产蛋性能
促卵泡激素
黄体生成素
蛋鸡
melatonin
egg quality
laying performance
follicle-stimulating hormone
luteinizing hormone
laying hens
作者简介
第一作者:张震,博士,副教授,研究方向为畜禽生物技术和健康养殖;通信作者:王永芬,博士,教授,硕士生导师。
