西双版纳刀耕火种轮歇地的萌生植物

Forest Regeneration by Sprouting in Slash and Burn Field, Xishuangbanna

通过对刀耕火种轮歇地萌生植物的调查研究 ,探讨了刀耕火种过程对植物的选择 ,以及植物对刀耕火种过程的适应性特征。结果表明 ,萌生是刀耕火种后植被恢复的一种重要方式。相对于种子更新的植物来说 ,萌生方式更新的植物倾向于具有较厚的树皮 ,随着树木径级的增加 ,树皮厚度也快速增长 ,在较短的时间内能达到抵御火烧的厚度。而以种子更新的植物树皮较薄 ,树皮厚度增长缓慢 。

The authors studied the sprouting of the plants in the field that was slashed and burned 6 years ago near Menglun, Xishuangbanna. The result showed that sprouting is an important form for vegetation recovery. These sprouting species had thicker bark compared to the seed regeneration species. Linear equation of bark thickness relating to diameter at breast height showed a particularly higher slope value in the sprouting species than that in the seed regeneration species. Sprouting species can quickly obtain a bark thickness enough to keep their sprouting ability at the coming slashing and burning.