【摘要】 对黄河故道地区苹果树体冻害情况进行了调查分析,结果表明,近年来该地区苹果冻害时有发生,冻害发生的时期主要为秋冬之交和早春,冻害发生的方位以偏北方向为重,幼龄或生长较旺的树冻害发生较严重,多年生枝段发病比低龄枝段严重,品种之间的抗寒耐冻性也有一定差异。还探讨了该地区苹果树体的冻因,为有效防止或减轻苹果冻害现象的发生提供依据。更多还原

【Abstract】 Through the investigation on the freeze injury of the apple tree trunk in the region of yellow river course, we found out that the freeze injury in this area happened occasionally during the time from later autumn to early spring. The younger apple tree or the luxuriantly growing one will have more serious freeze injury. Theperennial branches come on more seriously then the younger branches. There are distinguishes between the cold resistance and freeze resistance among the breeds, We also studied the cause why this happened, provided the basis for preventing the freeze injury efficiently.更多还原