杂交晚稻在抽穗扬花期,往往会遇到23℃的“秋寒”,造成抽穗缓慢,包颈严重,结实率下降,产量降低。根据我们的实践,在杂交晚稻穗期喷施“920”加磷酸二氢钾,埘防“秋寒”效果好,增产十分显著。 在抽穗期遇“秋寒”的杂交晚稻田,亩用“920”1克加磷酸二氢钾 Late hybrid rice at heading and flowering stage, often encounter 23 ℃ “autumn cold”, resulting in slow heading, wrapped neck serious, seed setting rate decreased, yield decreased. According to our practice, “920” plus potassium dihydrogen phosphate was sprayed in the late heading stage of hybrid late rice, and the effect of preventing autumn fall was good and the yield was very significant. Heading in the heading of “autumn” hybrid late rice fields, acres with “920” 1 g plus potassium dihydrogen phosphate