季节对育成母牛产粪量及粪N、P、Cu、Zn等污染物排放量的影响

Study on the Effect of Produce Faecal Output and N, P, Cu and Zn Pollutant Excretion in Growing Cow Faecal on Season

选择健康状况良好、体重相似、出生日期相近的中国荷斯坦育成母牛5只,采用全收粪法研究育成母牛在一年四季中产粪量及粪污染物(N、P、Cu、Zn和有机质)排放量的变化情况及规律。结果表明,季节对育成母牛产粪量与粪样中有机质及N、P、Cu、Zn污染物的排放量均存在着极显著(P<0.01)或显著(P<0.05)的差别,因此,根据不同季节产粪量及粪中污染物排泄规律来研究配制符合育成母牛的饲料配方,可达到既满足育成母牛的生产需要,又能最大限度地降低污染物排放量,减少奶牛场的污染。

Choosing five Chinese holstein growing cows with good health, similar weight, and the similar date of birth as test objects, the paper researched the produce faecal output and pollutant emissions（N, P, Cu, Zn and or- ganic matter） of the growing cows in all the year round by using the method of faecal collection. The results showed that, season had extremely significant（P〈O.O1） or significant（P〈O.05） difference between the produce faecal output and organic matter, N, P, Cu, Zn pollutant emissions of the growing cows. Thus, studying and disposing growing cow＇s uniform feed formula according to the law of produce faecal output and pollutant discharge in faecal on differ- ent seasons, was up to the purpose that not only to meet the production needs of growing cows, but also minimize the discharge of pollutants and reduce the pollution of the dairy farm.