抗杨树蛀干害虫林分的设计雏议

Proposal for Design Forest Structure Resisting to Poplar Stem Borers

依据对黄斑星天牛和光肩星天牛等杨树蛀干害虫抗性强弱,把常见的树种划分为6级,即高感虫树种(HS)、中感虫树种(MS)、感虫树种(S)、抗虫树种(R)、高抗虫树种(HR)和免疫树种(Ⅰ)。调查混交林的抗虫性能是株间混交感虫率<行间混交<带状混交<块状混交。设计杭天牛林分的原则是:以免疫树种和高抗树种为主,片、网、带三为一体,形成多树种、多林种混交的抗天牛林业生态系。

Proposes a principle for design forest structure resisting to sawyers based on the resistance of poplars to Anoplophora nobilis Ganglbauer, Anop-lophora glabripennis Motschulsky and other stem-borers. Poplars may be classified into 6 categories, i.e., highly susceptible (HS), moderate susceptible (MS), susceptible (S) , resistant (R) , highly resistant (HR) and immune species (I) . The order of resistibility of mixed forests is as follows, mixed individual planting<mixed row planting<mixed strip planting<mixed plot planting. By uring land HR species, combine with plot, net-work and strip-planting, a final resistant ecosystem with multi-species and mixed forests will be established.