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热带林地经游垦后气温和土温增高,相对湿度降低,水土流失加剧,地表迳流加大,土壤入渗量减少,贮水能力减弱,肥力下降。反复烧垦后形成茅草坡,难以恢复。热带林的更新和演替方向视采伐方式及人为活动干扰程度而异,采取保持郁闭度0.4以上的择伐,对森林恢复比较有利,尖峰岭林区今后经营方向应以保护为主。
After the reclamation of tropical forest land, the temperature and soil temperature increased, the relative humidity decreased, the soil erosion increased, the surface turbulence increased, the infiltration of soil decreased, the storage capacity decreased and the fertility decreased. Reclamation after the formation of thatch slope, hard to recover. The direction of regeneration and succession of tropical forests is different depending on the harvesting pattern and the degree of disturbance caused by anthropogenic activities. It is more beneficial to forest restoration to maintain the canopy density at or above 0.4, and the future operation direction of the forest in Jianfengling should be mainly protected.