摘要
奶牛牛群改良（dairyherdimprovement，DHI）可为牧场提供准确、可靠的信息，有利于牛群的良好管理。作者对DHI测定指标进行分析，并利用华南地区某奶牛场2012年2月2012年12月的DHI测定数据，对乳脂率、乳蛋白率、乳糖率、体细胞数和日产奶量5个指标进行趋势分析，并使用灰色关联模型对日产奶量的影响因子进行关联分析。结果显示，2～10月份产奶量不断下降，表明牛群的饲养环境管理不好；2～10月份的乳糖率、乳蛋白率和乳脂率逐渐上升，表明牛群的日粮结构合理，日粮干物质充足；体细胞数小于50万个／mL，表明牛群的乳房炎发生率较低，处于良好的健康状况。体细胞数是对日产奶量影响最大的因子，二者之间存在着极强的负相关关系。牧场管理者应加强对牛群饲养环境的管理，提高牛群的繁殖配种水平，改善牛群的日粮结构，做好乳房炎的检测和防制工作。
Dairy herd improvement （DHI） could provide accurate and reliable information for pasture,which could be helpful for the management of herds. This paper analyzed the indicators of DHI,and based on DHI data from February 2012 to Decem- ber 2012 of a dairy farm in South China, this paper performed trend analysis for milk fat rate, milk protein rate, milk lactose rate, the number of somatic cell and daily milk yield and make correlation analysis of factors of daily milk yield by gray relational model. The results showed that the milk production from February to October was declined, which showed that the rearing envi ronment of herds was poor. The milk lactose rate,milk protein rate and milk fat rate were increased,which showed that the diet structure was reasonable and the dietary dry matter was adequate. The somatic cell count was less than 500000/mL, which showed that the incidence of mastitis was lower and the herds were in good health. The number of somatic cell was also the most influential factor of the daily milk yield, and there was a very strong negative correlation among them. Therefore, strength- ening the management of cattle rearing environment, improving the level of breeding cattle breeding, adjusting the dietary nutri- tion structure and doing mastitis detection and prevention were very important for dairy managers.
出处
《中国畜牧兽医》
CAS
北大核心
2014年第2期254-258,共5页
China Animal Husbandry & Veterinary Medicine
基金
2011年广东省科技厅粤港关键领域重点突破项目"乳制品质量安全全生命周期智能溯源平台建设及应用"(2011A011303002)
2013年度中央高校基本科研业务费专项资金"基于物联网的乳制品质量全生命周期智能溯源关键技术研究"(x2jmD2132440)
