西双版纳橡胶林生物量随海拔梯度的变化

Changes of rubber plantation aboveground biomass along elevation gradient in Xishuangbanna.

对西双版纳低(550~600 m)、中(750~800 m)、高(950~1050 m)3个海拔梯度上橡胶林地上及各器官的生物量进行了测定。结果表明,海拔从低到高,地上生物量和干生物量都呈降低趋势,干生物量占地上生物量的70%以上;海拔间的地上生物量和干生物量差异显著(P<0.05)。枝和叶生物量为中海拔最高,低海拔次之,高海拔最低,二者分别占地上生物量20%和5%左右,仅高海拔和低海拔间差异显著(P<0.05)。气温的海拔间差异可能是引起生物量海拔间差异的重要原因之一。3个海拔上各器官生物量大小顺序为:干>枝>叶。橡胶林低海拔模型用于中海拔和高海拔、混合模型用于各海拔的生物量计算会导致不同程度的误差。

The investigation on the aboveground biomass of rubber plantation in Xishuangbanna at low(550～600 m),medium(750～800 m),and high(950～1 050 m) elevations showed that the aboveground biomass and its dry weight were decreased with increasing elevation,and there was a significant difference at different elevations.The dry weight of the biomass was higher than 70%.The biomass of branch and leaf,which occupied 20% and 5% of the aboveground biomass,respectively,was the highest at medium elevation,and the lowest at ...