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Aiming at the problems such as the increase of soil and water loss, the decrease of species diversity and the difficulty of natural recovery in remnant forest of the karst mountains in Guangxi, the scientific and technical personnel of Experimental Center of Tropical Forestry in Guangxi adopted the ecological restoration technology combining enclosure and artificial replanting to promote the succession to the zonal climax community.

In the early stages, first, Zenia insignis, Acrocarpus fraxinifolius, Leucaena leucocephala, and other pioneer nitrogen-fixing tree species suitable to grow in karst mountains were selected as the driving force to restore succession. Then artificial replanting was conducted in the natural secondary forests using the afforestation technique of combining guest soil and container seedlings to promote natural succession artificially. When the canopy density reached 0.6 or so, Deutzianthus tonkienensis, Ashoka, Delavaya toxocarpa, Gleditsia sinensis Lam and other tree species that are shade tolerant in the midcourse of succession were selected for the second time replanting, to accelerate the recovery rate of natural succession of karst mountains, thereby gradually formed the multi-species uneven aged compound storied forest.

After 30 years of ecological restoration, the degenerated remnant forest community has been transformed into a close-to-nature forest community that is complex in structure, distinct in stratification, rich in species, healthy and stable. The stand has formed five relatively stable hierarchies. (Experimental Center of Tropical Forestry)

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Demonstration model for mountain vegetation restoration technology

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Ecological restoration of degraded vegetation in Karst Mountains

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