我国奶牛磷需要量

Phosphorus requirements of dairy cow in China

饲喂奶牛应该满足而不是超过其营养需要量。给奶牛饲喂过量的磷会降低磷的利用率,增加磷向外围环境的排泄,从而造成严重的环境污染问题。降低奶牛日粮中磷的含量将减少磷的排泄和土壤中磷的蓄积,同时降低了生产成本,节约了不可再生的磷矿资源。

Dairy cattle should be fed to meet but not to exceed their nutrient requirements.Feeding excessive amounts of phosphorus(P)to dairy cattle will decrease the efficiency of phosphorus utilization,which results in increasing phosphorus excretion into the environment.Phosphorus losses from dairy manure to the environment are becoming a more severe pollution problem.Reducing phosphorus content in diets will help to reduce phosphorus excretion in manures,and associate phosphorus surplus in soils,while reduce costs of animal production and spare non-renewable phosphorus mineral sources.