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关于冬小麦冻害死亡的原因和时间,存在不同看法,概括起来有两种观点:一种认为冬麦冻害死亡主要是由于冬季降雪晚或降雪量少,致使分蘖节温度低于临界温度;另一种意见认为,冻害死亡不是由于低温造成的,而是冬春之交,化雪时期,气温骤然变化,忽冷忽热,一冻一化造成的。持第一种意见者,多认为死亡发生在冬季;持第二种意见者,多认为死亡发生在春季。为了弄清冬小麦冻害死亡的原因,我们曾利用冰箱进
There are two different viewpoints about the reason and time of winter wheat frostbite death: one is that the winter frost death is mainly caused by the late winter snowfall or the low snowfall, which causes the temperature of the tillering node to be lower than the critical temperature; Opinion that the death of frost damage is not caused by low temperature, but the turn of winter and spring, the snow period, the temperature suddenly changed, suddenly hot and cold, caused by a frozen. Those who hold the first opinion often think that death occurs in winter; those who hold the second opinion often think that death occurs in spring. In order to understand the cause of winter wheat frost damage, we have used the refrigerator into