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施氮过量时,早、晚稻,大麦和油菜的病虫危害逐渐加重。在适量范围内,磷肥用量增加,可减轻水稻、大麦和油菜的病虫害。钾肥用量增加,纹枯病、赤霉病和菌核病的危害减轻。
When nitrogen was excessive, pests and diseases of early rice, late rice, barley and rape were gradually aggravated. Within the proper range, the amount of phosphate fertilizer increased, which can reduce the pests and diseases of rice, barley and rapeseed. Potassium consumption increased, sheath blight, scab and Sclerotinia reduce the hazards.