近年来,因早稻中期生长期低温、阴雨、少日照,成熟期相应推迟,不同程度地影响了晚稻的适时早插秧,引起双季晚稻生育期相对延后,抽穗成熟期相应延迟的情况。另外,在一些地方晚稻施肥存在着碳铵、尿素用得多,而磷钾肥未能配足施用,给晚稻的提早抽穗也带来不利影响。如何预防寒露风的低温冷害,应作为夺取晚稻高产的一项重要措施。1.寒露风及其危害寒露风是指寒露节前后(9月下旬至10月上旬),从北方南下危害晚稻的第一次较强冷空气。是晚稻后期严重的灾害性天气,对晚稻尤其 In recent years, due to the low temperature, rainy days, less sunshine and maturity of early-growing rice in early stage, the delayed transplanting of late-season rice has been affected to different extents, causing relatively delayed growth period of double-crop late rice and corresponding delay of heading maturity. In addition, in some places there is ammonium bicarbonate fertilization in late rice, urea is much used, and phosphorus and potassium fertilizers are not enough to give early rice late heading also adversely affected. How to prevent chill and cold chilling injury should be used as an important measure to seize late rice high yield. 1. Cold dew and its hazards cold dew is before and after the cold dew Festival (late September to early October), from the north south of the more damaging late rice strong cold air. Late late rice is a severe catastrophic weather, particularly late rice