畜牧与饲料科学Issue(12)：25-26,27,3.
西北地区成乳牛粪尿中N、P、Cu、Zn产污系数的对比分析
Comparative Analysis of Pollutant-producing Coefficients of N, P, Cu and Zn in Feces and Urine of Adult Dairy Cows in Northwest Areas of China
张振伟 1周玉香 2张巧娥 2闫宏2
作者信息
- 1. 宁夏中卫山羊选育场，宁夏 中卫 755006
- 2. 宁夏大学农学院，宁夏 银川 750021
- 折叠
摘要
Abstract
Choosing 5 Chinese Holstein dairy cows with good health,similar fetal times and milk yield as test objects,the change laws of pollutant-producing coefficients of N,P,Cu and Zn of adult dairy cows in four seasons were studied by the method of feces and urine collection. The results showed that the pollutant-producing coefficients of N,P,Cu and Zn of adult dairy cows was significantly or extremely significantly influenced by different seasons. The change laws of pollutant-producing coefficients of P and Zn in four seasons were consistent. The pollutant-producing coefficients in summer were the highest and that in winter were the lowest. And the pollutant-producing coefficients showed a trend of increasing and decreasing.The change laws of pollutant-producing coefficients of N and Cu in spring were the highest and that in winter were the lowect. And the pollutant-producing coefficients showed a trend of decreasing, increasing and decreasing. Therefore the study on the appropriate nutritional needs of dairy cows in lactating period in different seasons could meet the production demands, reduce the feeding cost and reduce the generation of pollutants.关键词
成乳牛/产污系数/季节Key words
adult dairy cows/pollutant-producing coefficients/season分类
农业科技引用本文复制引用
张振伟,周玉香,张巧娥,闫宏..西北地区成乳牛粪尿中N、P、Cu、Zn产污系数的对比分析[J].畜牧与饲料科学,2013,(12):25-26,27,3.
