Research on formula fertilization by soil testing in Enping paddy rice

In order to establish an index system of formula fertilization by soil testing applied in the rice production in Enping city，the "3414" small plot experiment and middle validation test were carried out respectively in Jingang plot （Small） and Datian Lingnan plot（Middle）. Results indicated that the highest matching rate of fertilizer application （N∶P2O5∶K2O） in the two experiment plots were 1∶0.32∶0.56（S） and 1∶0.60∶1.39（M）. The highest fertili zing amount of N，P2O5，K2O nutrients recommended for the two plots were 85.74，51.55，103.61 kg（S）and 185.18， 57.94，103.61 kg（M）per hectare. Taking the market prices of N，P2O5，K2O and rice price in 2012 into calculatio n，the appropriate fertilizing amount of N，P2O5，K2O for the two testing plots should better be 84.48，50.51，99.83 kg （S） and 174.81，53.40，99.83 kg（M）per hectare.