【摘要】 对合肥市国槐衰退和枯死原因的调查研究表明 ,造成国槐衰退、枯死的原因是多方面因素共同作用的结果 ,是一种树木衰退病。该病发生的主要原因是 :1诱发因素———土壤板结或透气性差、土壤污染 (轻微 )、根系裸露或深埋、树龄较大、枝梢害虫危害等 ;2激化因素———食叶害虫、土壤污染 (中度 )、机械损伤、干旱和积水等 ;3促进因素———腐烂和溃疡病菌、腐朽菌、蛀干害虫危害等。该研究结果为国槐衰退病的防治提供了理论依据 ,也为城市其他树木衰退或枯死原因的研究和防治提供参考。更多还原

【Abstract】 Investigation on the cause of a decline disease of Sophora japonica was carried out in Hefei City.The results showed that the causes of the disease might develop from three or more groups of factors.The first group were inducing factors ie hardened and impervious soil,soil pollution(light),older tree,root exposed or deep covered,and shoot infested by insect pests.The second group were inciting factors ie looper,soil pollution(middle),machinery and human injury,drought or accumulated water in the soil.The third group were contributing factors ie canker fungi,decay fungi and borers.The paper provided beneficial foundations for the control of decline disease of Sophora japonica and a good example for other decline diseases of urban trees.更多还原