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柑桔发生冻害的原因错综复杂,但总括起来有两种,一种是气象方面的原因叫气象学因子(外因),另一方面是植物本身内在的原因叫植物学因子(内因),在外因气象因子相同的条件下,柑桔品种树形内因子对柑桔冻害起着决定性的作用。笔者就柑桔树形与柑桔冻害的关系进行了一个比较试验。1
There are two reasons why citrus frost damage occurs, but in summary, there are two kinds of meteorological factors (meteorological factor), on the other hand, the intrinsic cause of plant itself is called botanical factor (intrinsic factor) Under the same factor, the internal factor of tree species of citrus played a decisive role in the freezing injury of citrus. The author conducted a comparative experiment on the relationship between citrus tree shape and citrus frost damage. 1