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珠江三角洲是我国重要商品粮基地之一。由于属季风发达地区,冬季风时期,盛行偏北低温干燥气流,对喜温作物有一定危害,群众称之为“寒露风”及“倒春寒”。这两种灾害性天气是造成珠江三角洲水稻产量不稳定的重要原因之一。寒露风主要危害晚造抽穗扬花、灌浆、成熟,造成晚造减产;倒春寒主要造成早稻烂秧。由于烂秧导致早造、晚造季节相继推迟,致使晚稻常常遭受寒露风危害,轻者每亩减产30—50斤,重者100斤以上。如何克服水稻产量不高不稳情况,可以从
The Pearl River Delta is one of China’s important commodity grain bases. Since it belongs to the developed monsoon region and prevails in the winter monsoon period, the northeastern low-temperature dry airflow prevails on the thermophilic crops, and the masses call it “cold dew wind” and “late spring cold”. These two kinds of disastrous weather are one of the important reasons for the unstable rice yield in the Pearl River Delta. The main detriment of cold dew wind earring late flowering, filling, mature, resulting in late cut production; late spring mainly caused early rice rotting seedlings. As a result of rotten seedling early, late late season have been delayed, resulting in late rice often suffer cold dew hazards, the light output of 30-50 kg per mu, weight more than 100 pounds. How to overcome the situation of low and unstable rice yield can be from