Study on the technology of variation of soil nutrients in farmland and regionalized fertilization of soybean

The paper studied on the spatial variability and regionalized fertilization of soybean at the Shenyang Military Area Tongbei Farm by using the technology of Global Positioning System(GPS)and Geography Information System(GIS).The results showed that the black soil in the north of Heilongjiang Province was relatively rich in fertilities;the contents of nitrogen,phosphorous and potassium were fairly high,but the contents of boron and zinc were very low.The variation of spatial distribution of OM,N,P,K,S,B and Zn was significant.The correlation existed between the degree of soil nutrients declining and the coefficient of variance of the soil nutrients was close;and the coefficient of correlation was 0.57.The regionalized fertilization of soybean had achieved a good result,through which the yield increased 243 kg/hm2,it increased by 12.1%,the benefit was 696 yuan/hm2,on average.