摘要
试验旨在比较不同月龄荷斯坦青年母牛初配期繁殖性能和健康状况。选取13.0、13.5、14.0三个月龄初配期荷斯坦青年母牛各20头,比较了其繁殖性能和健康状况。结果表明:13.5月龄组的青年母牛体重显著高于13.0月龄组(P<0.05),且与14.0月龄组无显著差异(P>0.05),但受胎率(52.94%)高于13.0月龄组(31.58%)和14.0月龄组(36.84%)。13.5月龄组血清中促黄体生成素(LH)、促卵泡素(FSH)、催乳素(PRL)含量及血中淋巴细胞百分率、中间细胞百分率、红细胞、红细胞压积、红细胞平均体积、血小板平均体积及细胞因子白细胞介素-2(IL-2)、肿瘤坏死因子-α(TNF-α)含量均高于13.0月龄组(P<0.05),与14.0月龄组差异不显著(P>0.05)。说明13.5月龄初配期青年母牛具有更好的繁殖激素分泌和健康状况,是适合于生产中的最早参配月龄。
This study aimed to compare the reproductive performance and health status of young Holstein heifers at different ages during the initial mating period.Twenty young Holstein heifers,each at the ages of 13.0,13.5,and 14.0 months were selected and their reproductive performance and health status were com-pared.The body weight of the 13.5 month-old group was significantly higher than that of the 13.0 month-old group(P<0.05),with no significant difference compared to the 14.0 month-old group(P>0.05).The aver-age conception rate of the 13.5 month-old group(52.94%)was higher than that of the 13.0 month-old group(31.58%)and the 14.0 month-old group(36.84%).In addition,the levels of luteinizing hormone(LH),follicle-stimulating hormone(FSH),prolac-tin(PRL),lymphocyte percentage,intermediate cell percentage,red blood cell count,hematocrit,mean red blood cell volume,mean platelet volume,cytokine interleukin-2(IL-2)and tumor necrosis factor-α(TNF-α)in the serum of the 13.5 month-old group were higher than those of the 13.0 month-old group(P<0.05),but there was no significant difference compared to the 14.0 month-old group(P>0.05).In summary,Young Holstein heif-ers at 13.5 months of age had better reproductive hormone secretion and health status at the beginning of the mating period,and this age was the earliest suitable age for breeding in production.
作者
乔依娜
吴太平
贺秋月
张楠
杜斌
李霞
万国辉
张宝宝
罗玥
高峰
QIAO Yi’na;WU Taiping;HE Qiuyue;ZHANG Nan;DU Bin;LI Xia;WAN Guohui;ZHANG Baobao;LUO Yue;GAO Feng(College of Animal Science,Inner Mongolia Agricultural University,Inner Mongolia Hohhot 010018,China;Inner Mongolia Shengmu High-Tech Animal Husbandry Co.,Ltd.,Inner Mongolia Hohhot 010018,China)
出处
《饲料工业》
北大核心
2025年第15期80-84,共5页
Feed Industry
基金
中国内蒙古自治区呼和浩特市科技计划应用技术研究与开发项目[2022-农-6]。
关键词
月龄
荷斯坦
青年母牛
初配期
繁殖性能
健康状况
month-old
Holstein
heifers
initial mating period
reproductive performance
health status
