西双版纳热带山地雨林生物量研究

Biomass of tropical montane rain forest in Xishuangbanna of Southwest China

观测了西双版纳山地气候,建立了山地雨林生物量回归方程,调查了海拔1 100~1 820 m范围5块样地(面积0.16~0.25 hm2)的热带山地雨林生物量。结果表明,海拔1 105和1 610 m的年平均温度分别为20.1和16.6℃,年降雨量分别为1 659和2 011 mm,旱季(11~4月)降雨量分别为295和283mm,年平均相对湿度分别为81%和84%;5块样地生物量变化为256.4~368.6 t.hm-2,平均为312.6t.hm-2,其中乔木占97.1%、木质藤本占1.2%、幼树和灌木占1.3%、草本和幼苗占0.4%;采用热带季节雨林生物量回归方程估计山地雨林生物量,会使得总生物量以及树干和树根生物量高估38.3%~61.5%,树枝生物量低估7.6%~30.8%。可见,西双版纳山地海拔增加导致雨季降雨量增加,山地雨林生物量较热带季节雨林降低32.6%,季节雨林生物量方程不适用于山地雨林。

This paper observed the tropical montane climate in Xishuangbanna of Southwest China,investigated the biomass of tropical montane rain forest in 5 plots(0.16～0.25 hm^2) at the altitude of(1 100)～(1 820 m) there,built the biomass regression equation and estimated the biomass of montane rain forest,and compared the results derived from the biomass regression equations of the tropical seasonal rain forest distributed at lower area and the montane rain forest.At the two altitudes of(1 105) and(1 610 m),the aver...