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“寒露风”是指9月中、下旬北方冷空气南侵造成晚稻生长后期减产的严重天气灾害。晚稻抽穗、扬花、灌浆期最适宜的气温为25—28℃,当三日平均气温低于20—22℃以下时,抑齐穗、抑灌浆,导致空秕增多,粒重下降,使晚稻减产以至失收。 晚稻生长后期是干物质形成的关键时期。因为水稻干
“Cold dew wind” refers to the severe weather disasters that led to the reduction of late rice growth in late mid-September due to the cold air southward invasion in the middle of September. The optimum temperature for heading, flowering and filling in late rice was 25-28 ℃. When the average daily temperature was lower than 20-22 ℃, the rice was restrained and grouted, which led to the increase of air column and grain weight, Even lost. Late rice growth is the key period of dry matter formation. Because rice is dry