论抚育间伐对小蠹虫危害的抑制作用

抚育间伐增强云南松林分的转化功能，使死亡量减少而净生长量增多，从而增强林分系统的内能。云南松林分抵御病虫危害的功能与立地环境的优劣有关，也与本身的转化功能有关。间伐被压木乃至间伐Ⅲ级木，林分在蠹害过程中表现出强大的抵御能力。在立地条件相似的环境中，抚育间伐促进林分的转化功能，所以林分抵御蠹害的抗性也随间伐强度增大而增强。

A Discussion on Suppression of Tending Intermediate Cutting for Damage of Tomicus Piniperda

Intermediate cutting will enhance the conversion ability of Pinus yunnanensis stands,which lead to the decrease of death and the increase of net incement,so the internal energy of stand system is enhanced,The ability of suppression of Pinus yunnanensis to harm of pest is related with site conditions and conversion ability of itself. Stands will show a po werful resistance to Tomicus piniperda when the suppressed or even dominated are felled. Under the similiar conditions,intermediate cutting improve conversion ability of stands,so the inhibition of stands from harm of Tomicus piniperda will be enhanced with the increase of cutting intensity.