摘要
在奶牛日粮中添加微量元素Ｚｎ，Ｃｕ，Ｍｎ，Ｃｏ和Ⅰ，产奶量可提高２０％，奶的品质改善，母牛受胎率提高，繁殖机能增强，具有明显的经济效益。
Such microelements as Zn,Cu ,Mu , Co,I were added to the ration. The results showed that the milk yield was increased by 20%.The milk quality was improved ,the pregnant rate was increased and the productive function was strengthened. Therefore , the economic effect was significant.
出处
《河南农业大学学报》
CAS
CSCD
1994年第3期275-277,287,共4页
Journal of Henan Agricultural University
关键词
乳牛
微量元素
饲养
生产性能
black-white dairy acttle
milk yield
productive function
milk quality
