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爱辉县位于黑龙江畔,是我国最北部的高寒稻作区。无霜期85～125天,活动积温1600～2300℃。水稻分布在沿江平原地带。由于气候多变,水稻低温冷害频繁,平均每2～3年出现一次。受害的水稻,轻者减产3～5成,重者甚至绝产。因此掌握低温冷害的发生规律,明确发生的原因,找出防御的措施是水稻生产急待解决的问题。一、水稻低温冷害发生的原因不利的气候条件是水稻低温冷害发生的主要原因,但不良的栽培技术加重了水稻的
Aihui County is located in Heilongjiang River, is the most northern part of the alpine rice area. Frost-free period 85 to 125 days, activity accumulated temperature 1600 ~ 2300 ℃. Rice is distributed in the plains along the Yangtze River. Due to the changing climate, low temperature chill rice frequently, an average of every 2 to 3 years. Victims of rice, the light reduction of 3 to 5 percent, even heavy or even abortion. Therefore, mastering the law of chilling damage, clarifying the causes and finding out the defensive measures are the urgent problems to be solved in rice production. First, the causes of low temperature chilling Rice unfavorable weather conditions are the main causes of cold damage in rice, but poor cultivation techniques aggravate the rice