秋季,我县气候由热转冷。特别是从白露、秋分到寒露这段时间,北方冷空气频繁南下,常常出现连续三天以上日平均气温低于20℃,并伴随有大风、阴雨、寡照的天气。人们通常把这种低温天气,称为“寒露风”。双季晚稻抽穗期间遇上“寒露风”,会造成抽穗速度减慢,齐穗期推迟,甚至抽不出穗而造成包颈。在开花期遇到“寒露风”,会造成一日中开花时间推迟,花药不能正常开裂,不能散粉,或者花粉发芽推迟或不发芽,花粉管不伸长,或者伸长的速度减慢,甚至花粉管发生变 Autumn, my county climate from cold to heat. Especially from the white dew, autumnal equinox to the cold dew this time, the north cold air frequently south, often appear for more than three consecutive days average daily temperature below 20 ℃, accompanied by strong winds, rainy weather, the weather. This cold weather is commonly referred to as “cold dew winds.” During the heading of double-season late rice, “Cold dew winds” encountered during heading period will result in slowing of heading speed, postponing full heading period, and even causing spikes caused by spike. Encountering “cold dew wind” in the flowering period, will result in the delaying flowering time in the first day, the anther can not normally crack, can not loose the powder, or the pollen germination delays or does not germinate, the pollen tube does not elongate or the elongation speed slows down, Has changed