2008•Turang feiliaoRequires access
Research on the fertilizer effect for late-cropping hybrid rice
Weihua Zhu
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Abstract
Field experiment of fertilizer effect were conducted in Taoyuan county in 2006.The results indicated that production effect of nitrogen fertilizer for late-cropping hybrid rice Jinyou 207 occupy first(increased by 43.3%),then potash(27.2%),and phosphate effect are not obvious(only 2.8%).Effect of the potash fertilizer have something to do with the content of quick-acting K and slow-acting K in the soil.Quadratic polynomial models of fertilization effects of 3 experiment plots were simulated,adopting the method of second-degree polynomial stepwise regression.According to the models,optimum amount of applied fertilizer are as follows N 148.0～188.0 kg/hm2 and K2O 74.3～103.0 kg/hm2.