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黑龙江省地处祖国最北部,无霜期短,农作物生长季节里的热量条件不稳定。低温冷害常常是影响粮食总产波动的重要原因之一。据省气象科研所资料,大于10℃活动积温年际间每减少100℃,粮食产量会减少8—10%。低温冷害对农作物的影响大致可以分为两种类型。第一种类型是在作物整个生育期内热量不足,积温不够,而延长生长发育过程,在初霜到来之前不能正常成熟。第二种
Heilongjiang Province is located in the northernmost part of the motherland, frost-free period is short, the crop growing season in the heat conditions are not stable. Chilling damage is often one of the important factors affecting the fluctuation of total grain output. According to the provincial meteorological research institute data, when the active accumulated temperature above 10 ℃ declines by 100 ℃ during each year, grain output will be reduced by 8-10%. The effects of chilling injury on crops can be roughly divided into two types. The first type is the lack of calories throughout the growing period of the crop, accumulated temperature is not enough to extend the process of growth and development, before the arrival of the first frost can not be normal maturity. The second one