Optimum Fertilization of Late Hybrid Rice in Hengdong County of Hunan Province

Through analysis of measuring soil fertilizer of Fengyuanyou 272，test data showed that N，P and K on its economic characters had different degrees of influence，and P production effect was largest，N relatively slightly，K followed.Best fertilizer rate was 46% urea 298.5 kghm2，12% calcium superphosphate 312.0 kghm2，60% potassium chloride 82.5 kghm2，its output was 7707.0 kghm2.It provided rice production technical basis for measured soil fertilizer in Hengdong county.