The loss of nitrogen and phosphorus in sloping land is an important source of Agricultural non-point source pollution.In this research,the sloping red soil in Xiangyin county,Hunan Province was studied through a field experiment in order to discuss the effect of reducing fertilization on maize yield,the utilization ratio of fertilizer and the loss of N,P.The results showed that N,P fertilizer fluctuating within 20% of the conventional wuold not influnce maize yield very significantly.However,when fertilizer...