不同饲养模式下乳牛粪尿中氮磷排放量的研究

Research on the discharge of nitrogen and phosphorus in cows' fecaluria in different feeding mode

试验通过对规模化养殖场、奶农合作组织两种不同养殖模式下乳牛粪便中氮、磷含量进行抽样测定,旨在研究不同养殖模式对乳牛氮和磷污染物排放量的影响。结果表明:规模化奶牛场和奶农合作组织粪尿中总氮的排泄量占摄入量的比例从低到高的排序均为产奶牛、干奶牛、育成牛;规模化奶牛场奶牛不同生理阶段磷排泄量占摄入量的比例从低到高的排序为育成牛、产奶牛、干奶牛;奶农合作组织奶牛不同生理阶段磷排泄量占摄入量的比例从低到高的排序为产奶牛、育成牛、干奶牛。

The experiment was conducted to study the effect of different feeding mocle on the discharge of nitrogen and phosphorus in cows＇ fecaluria by determining the content of nitrogen and phosphorus of cows in the feeding mode of scale dairy farm and the park-style dairy cooperative. The results showed that the discharge of total nitrogen from low to high were milking cow, dry cows, growing cows in the two dairy farms. In the large scale dairy farm, fecal phosphorus of dairy cattle from low to high sort were growing cows, milking cow, dry cows at the different physiological stages. The different physiological stages cattle in the park-style dairy cooperative ,total phosphorus that from low to high sort were milking cow, growing cows, dry cow.