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目前,多数农户在优质稻病虫防治上仍采取单打一的化学防治方法,这势必会影响优质稻的米质。据我们近年的实践,优质稻要获得优质,在病虫防治策略上必须实行“五优”。 1.优化施肥结构首先。要提倡经济施氮,既氮肥施用量既要满足水稻生长的需要,又不至于因施用过量而诱发病虫。一般在苗期要控氮,孕穗期每667平方米施尿素1.5～2千克,齐穗期施1～1.5千克,后期如脱
At present, most peasants still take the chemical prevention and control method of singles one in the prevention and control of high-quality rice pests and diseases, which is bound to affect the quality of high-quality rice. According to our practice in recent years, high-quality rice needs high quality and must implement “five excellent” strategies in pest control. 1. Optimize fertilization structure First of all. To promote economic nitrogen, nitrogen fertilizer both to meet the needs of rice growth, but not due to excessive use of induced pests. Generally in the seedling stage to control nitrogen, booting every 667 square meters of urea 1.5 to 2 kg, full heading 1 to 1.5 kg, later as off