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近年来由于受气候、品种等因素影响,冻害逐渐成为小麦生产中的严重灾害。根据多年经验,我认为小麦冻害发生的主要特点及防止方法如下。一、小麦冻害发生特点1.越冬期交替冻融型。这类冻害多在12月中旬到1月底。近几年由于暖冬天气,冬前小麦生长快,抗寒能力降低,冻害常发生。冻害发生一般为叶片,严重时可出现死蘖现象。2.早春温度骤变型。这种冻害多在2月初到3月上旬。这一时期小麦处于返青期到起身期,此时气温变化频繁,发生冻害的
In recent years due to climate, breed and other factors, frost damage has become a serious disaster in wheat production. Based on many years of experience, I think the main characteristics of wheat frost damage and prevention methods are as follows. First, the characteristics of wheat frost damage 1. Overwintering alternating freeze-thaw type. Most of these frost damage occurs in mid-December to the end of January. In recent years due to warm winter weather, winter wheat grow fast, reduce the ability of cold, frost damage often occurs. Frost damage occurs generally leaves, severe tillering phenomenon may occur. Early spring temperature sudden change type. This frost damage more in early February to early March. During this period, the wheat is in the turning-green period and then rose, when the temperature changes frequently and frost damage occurs