关键词: 致病疫霉, 致病疫霉, 分离方法, 培养基

Abstract: The two factor random experiments were conducted to study the effects of nitrogen applied and planting density on ratoon rice yield of II youhang1 on culture of early rice. The results showed that the main rice yield on nitrogen applied, planting density, reciprocity nitrogen applied and planting density was best remarkable and the ratoon rice yield was not remarkable. The two season total yield on planting density was remarkable. In main rice it used 150kg N per hm2and Planting density 225000 ~300000 hills per hm2 as 195~240kg N per hm2 and planting density 150000 ~300000 hills per hm2,It was work in that other supplemental culture measures of high yield, The two season high yield was cropped on ratoon rice cultivar. Effective panicles of the ratoon rice and the main rice was remarkable relation。