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(一)低温对植物的为害按气象学来讲,低温对植物的为害,主要地可分为下列四种: (1)寒害温度不低于零度,热带亚热带植物,因气温的降低引起种种生理机能上的障碍,因而遭受损伤,是曰寒害。 (2)冻害气温下降至零下,植物内部组织脱水而结冰,因而受害的现象,叫做冻害。 (3)霜害冷气下沉,地面水蒸汽疑结成霜,冷气由霜向上幅射,形成逆温层。1955年1
(A) low temperature damage to plants According to meteorology, low temperature damage to plants, mainly can be divided into the following four: (1) chilling injury temperature of not less than zero degrees, the tropical subtropical plants, due to lower temperature caused by a variety of physiological Mechanical obstacles, thus suffering damage, is saying cold damage. (2) frost damage temperature dropped to zero, the plant internal tissue dehydration and freezing, and thus the phenomenon of victimization, called frost damage. (3) Frost damage air-conditioning sink, the ground water vapor doubts frost, air-conditioned frost upward radiation, the formation of inversion layer. 1955