开展了不同氮肥施用量与早稻纹枯病发生程度关系的试验。结果表明:不同氮肥施用量与早稻纹枯病发生程度呈明显正相关,在相同磷、钾肥施用量的基础上,随着氮肥施用量的增加,早稻纹枯病逐渐加重。早稻施氮量217.5kg/hm2有利于早稻纹枯病的发生,施氮量285kg/hm2以上极有利于早稻纹枯病的发生。建议早稻施氮量控制在195kg/hm2左右为宜。 Experiments were carried out on the relationship between different nitrogenous fertilizer rates and the occurrence of rice sheath blight. The results showed that there was a significant positive correlation between different nitrogen application rates and the occurrence of sheath blight of early rice. On the basis of the same phosphorus and potassium application rates, the sheath blight of early rice gradually aggravated with the increase of nitrogen application rate. The amount of nitrogen application in early rice was 217.5kg / hm2, which was beneficial to the occurrence of rice sheath blight. The rate of nitrogen application above 285kg / hm2 was very beneficial to the occurrence of rice sheath blight. It is suggested that the amount of nitrogen applied in early rice should be controlled at about 195kg / hm2.