栗山天牛在我国东北林区灾害成因分析

Analysis of Causes of Disasters of Massicus raddei in the Forest Area of Northeast China

栗山天牛是栎树林的毁灭性蛀干害虫,近年来,由于栎树林具有的脆弱性、易感性,栎树林林分抗虫能力低下,栗山天牛灾害呈现加重趋势,其引发的栎树林生物灾害在我国东北地区已上升为重要灾害,给森林生态效益的发挥造成严重影响。因此,栗山天牛的防治是当前林业资源保护的重要任务之一。分析结果表明,栗山天牛灾害形成的内在原因是栗山天牛的K-生态对策。灾害形成的外在原因是承灾体天然次生栎林的脆弱性。同时由于防灾控灾措施不到位致使灾害持续加重。基于此,本文从灾害学的理论出发,对栗山天牛致灾因子的危害性、承灾体的脆弱性、孕灾环境的稳定性进行分析,指出了灾害的成因路径,从而为栗山天牛的灾害防控提供科学依据。

Massicus raddei is a destructive stem borer pest of oak forest.In recent years,due to the vulnerability and susceptibility of oak forest,the insect resistance of oak forest is low,and the disaster of Massicus raddei showed an increasing trend.The biological disaster of oak forest caused by Massicus raddei has risen to an important disaster in Northeast China,which has a serious impact on the ecological benefits of forest.Therefore,the prevention and control of Massicus raddei is one of the important tasks of current forestry resource protection.The results showed that the internal cause of the formation of Massicus raddei disaster is the K-ecological strategy.The external cause of the disaster is the vulnerability of the natural secondary oak forest.At the same time,due to the lack of disaster prevention and control measures,the disaster continued to increase.Based on this,starting from the theory of disaster science,this paper analyzed the harmfulness of the disaster-causing factors,the vulnerability of the disaster-bearing body,and the stability of the disaster-pregnant environment,and pointed out the cause path of the disaster,so as to provide scientific basis for the disaster prevention and control of Massicus raddei.