滇中不同次生演替阶段植被类型对林冠截留的影响

The Effect of Vegetation at Different Secondary Succession Stages of Semi-Humid Evergreen Broadleaved on Interception in Central Yunnan,China

主要研究了滇中地区半湿润常绿阔叶林不同次生演替阶段的四种植被类型(桉树人工林、云南松林、针阔混交林、次生常绿阔叶林)的林冠截留与降雨量关系,并系统研究了林冠截留与多样性指数、叶面积指数及乔木层盖度的关系.结果表明四种植被类型的林冠截留量与降雨量都成对数函数关系I=a×lnP+b,随着群落结构复杂程度增高,则参数a值也相应的表现为桉树人工林(3.05)<云南松林(6.04)<针阔混交林(7.13)<次生常绿阔叶林(7.33);林冠截留率与降雨量成幂函数关系Ic=a×pb.林冠截留量及林冠截留率与多样性指数、叶面积指数及乔木层盖度呈现线性关系.

Relationship between interception of four types of vegetations at different secondary stages of semi - hu- mid evergreen broadleaved and rainfall was analyzed, including Eucalyptus forest, Pinus yunnanensis forest, the semi -natural forest of Keteleeria evelyniana and Pinus yunnanensis and the natural secondary forest in Central Yunnan, China. The effect of biodiversity, leaf area index and woody coverage on interception was also systemically analyzed. By simulation interception of these vegetations was increased in logarithm with rainfall by the equation ： I =a×1nP＋ b, and the value of the parameter a showed the order： Eucalyptus forest （3.05） 〈 Pinus yun- nanensis forest （6.04） 〈 the semi - natural forest of Keteleeria evelyniana and Pinus yunnanensis （7.13 ） 〈 the natural secondary forest（7.33 ） , which indicated that interception increased with more complexity of community structure. The relationship of ratio of interception of these vegetations and rainfall was described with the equation Ic = a×p^b. Result also showed that interception and ratio of interception were a positive linear correlation with biodiversity （ Shannon - wiener index ）, leaf area index （LAI） and woody coverage.