抚育间伐持续控制松纵坑切梢小蠹效果研究

Sustainable control effect of Tomicus piniperda by intermediate cutting

抚育间伐能提高云南松林分的转化功能 ,增强林分抵御蠹害的能力。不同抚育强度林分 ,对纵坑切梢小蠹的持续控制效果不同。经过多年观察发现 ,弱度和中弱度间伐持续控制蠹害效果最好。不间伐林分中 ,小蠹虫种群总是高于间伐林分中小蠹虫种群。合理实施不同的抚育间伐 ,协调了生态系统内的多种有利因素 ,创造了有利于林木健康生长的环境 ,有益于生物多样性的保护 ,促进云南松林生态系统形成抑制小蠹虫发展的稳定的自然控制良性循环 ,达到持续控制蠹害的目的。表 5参

Intermediate cutting enhances the conversion function of Pinus yunnanensis stands and defense ability of that against Tomicus piniperda.Different levels of intermediate cutting intensities for the stands have different sustainable control effects of T. piniperda.The effect of sustainable control for T. piniperda is the most significant with less and moderate less intensity of intermediate cutting.The population of T. piniperda is higher in non intermediate cutting stands than that in intermediate stands.Suitable intermediate cutting adjusts many kinds of favorable factors in the ecosystem,creates better environment which is in favor of health growth of Pinus yunnanensis stands,and profits the biodiversity conservation of that.Consequently,it promotes positive cycle on stable natural control for P. yunnanensis stands against T. piniperda, and P. yunnanensis stands can be sustainable against T. piniperda.