论文部分内容阅读
以浙江省舟山岛10块松材线虫病伐除迹地上自然恢复而成的次生马尾松林群落为研究对象,使用窗式诱捕器,调查样地内的昆虫群落结构与功能群,分析寄生性昆虫与松材线虫病及环境因子之间的关系。结果表明:膜翅目(17科47种1178只)、鞘翅目(24科41种520只)和双翅目(18科32种616只)昆虫是样地内的优势类群;相对于其他针叶林群落,松材线虫病伐除迹地内寄生性昆虫类群占昆虫总数比例明显偏大;随着针叶树种比例的减小,样地内寄生性昆虫数量呈增多的趋势(5针5阔<3针7阔<1针9阔),且与当年危害程度(1针9阔<3针7阔<5针5阔)成反比。这说明在管理针阔混交林时应增加阔叶树种的比例以增加寄生性昆虫的数量从而抵御松材线虫的入侵。此外,冗余分析结果表明,土壤含水量是影响寄生性昆虫在松材线虫病伐除迹地内分布最主要的环境因子。
In this study, 10 secondary Pinus massoniana forest cuttings from Zhoushan Island, Zhejiang Province, were selected as the study object to study the community structures and functional groups of insects in the sampling site using window traps. And pine wilt disease and environmental factors. The results showed that: Hymenoptera (17 families and 47 species and 1178), Coleoptera (24 families and 41 species and 520 species) and Diptera (18 families and 32 species and 616) insects were the dominant species in the sample plots; In the forest community, the proportion of parasitic insects in the deforested land of pine wood nematode accounted for a significantly larger proportion of the total number of insects. With the decreasing of the proportion of coniferous trees, the number of parasitic insects in the plot tended to increase (5-pin <5-pin 7 wide <1 needle 9 wide), and with the current degree of harm (1 needle 9 wide <3 needle 7 width <5 needle 5 width) is inversely proportional. This shows that in the management of coniferous and broad-leaved forest should increase the proportion of broad-leaved species in order to increase the number of parasitic insects to resist the invasion of pine wood nematode. In addition, the results of redundancy analysis showed that soil moisture was the most important environmental factor that affected the distribution of parasitic insects in the woodland of pine wilt disease.