冬小麦在越冬期间,受0℃以下低温或剧烈温度变化造成的伤害称为冻害。冻害是冬小麦生产中一种常见而严重的为害。为了减少冻害造成的损失,现介绍七项防止小麦遭受冻害的措施: 一、浇好冻水。在缺墒的麦田,冬灌可以补足土壤水分,增强土壤保温和调温的性能,一般可增产10—20％。冬灌的时间一般在冬前昼消夜冻、日平均气温降到4—5℃时进行最好。土壤含水量沙土低于15—16％、壤土低于17—18％、粘土低于19—20％时,就应进行灌溉;如果土壤含水量高于这个 Winter wheat during the winter, subject to low temperature below 0 ℃ or severe temperature changes caused damage called frost damage. Frost damage is a common and serious damage to winter wheat production. In order to reduce the damage caused by frost damage, are introduced seven measures to prevent frost damage to wheat: First, pour cold water. In the lack of moisture in the wheat field, winter irrigation can make up for soil moisture, enhance soil thermal insulation and temperature control performance, generally yield 10-20%. Winter irrigation in the winter before the general day and night freeze, the average daily temperature dropped to 4-5 ℃ when the best. Soil moisture should be irrigated when soil moisture is less than 15-16%, soil less than 17-18%, and clay less than 19-20%; if soil moisture is higher than this