摘要
[目的]探究安格斯犊牛被动免疫成功率的影响因素。[方法]以安格斯母牛及其犊牛为研究对象,对母牛初乳质量、母牛体况评分及犊牛初乳饲喂量、犊牛初生重以及犊牛断奶后死亡率等进行统计,并测定犊牛血清IgG含量,进而分析影响安格斯犊牛被动免疫成功率及犊牛淘汰率的因素。[结果]饲喂合格初乳(IgG含量≥50 mg/mL)的犊牛被动免疫成功率远大于饲喂不合格初乳的犊牛;被动免疫成功率随初乳饲喂量的增加而升高;随着母牛体况评分的升高,犊牛平均初生重也随之增加且血清平均Brix呈升高的趋势。[结论]犊牛被动免疫成功率受初乳质量和初乳饲喂量的影响。母牛体况评分不仅影响犊牛被动免疫成功率,而且对犊牛平均初生重有显著影响,进而影响犊牛淘汰率。
[Objective]To investigate the influence factors of the passive immunity of Angus calves.[Method]Taking Angus cow and calf as the research object,the cow colostrum quality,body condition scoring and calf colostrum feeding amount,birth weight and weaning calf after mortality statistics,etc.were studied.And the calf serum IgG content was determined,then factors influencing Angus passive immunization success rate and elimination rate of calves were analyzed.[Result]The results showed that the passive immunization success rate of calves fed with qualified colostrum(IgG content≥50 mg/mL)was much higher than that of calves fed with unqualified colostrum.The success rate of passive immunization increased with the increase of colostrum feeding amount.With the increase of body condition score,average birth weight and serum average Brix value of calves also increased.[Conclusion]The passive immunization success rate of calves was affected by the colostrum quality and the feeding amount,and cow body condition score not only affected the passive immunization success rate of calves,but also significantly affected the birth weight of calves,and then affected the elimination rate of calves.
作者
钟罡
檀论
李红光
范彩云
程建波
ZHONG Gang;TAN Lun;LI Hong-guang(Inner Mongolia Agricultural Technology Extension Center,Hohhot,Inner Mongolia 010010;College of Animal Science and Technology,Anhui Agricultural University,Hefei,Anhui 230031;Zhonghe Hengrui(Guizhou)Co.,Ltd.,Bijie,Guizhou 551700)
出处
《安徽农业科学》
CAS
2023年第1期95-97,共3页
Journal of Anhui Agricultural Sciences
基金
贵州省科技计划项目(黔科合支撑〔2019〕2281号)。
关键词
被动免疫
淘汰率
体况评分
初生重
安格斯牛
Passive immunity
Elimination rate
Body condition score
Birth weight
Angus cattle
