丘陵山区生态修复效果评价——以赣榆县横山生态修复试验区为例

Assessment on the Ecological Renovation Effect in the Hilly Area Taking the Hengshan Ecological Restoration Experimental Zone of Ganyu County as Example

通过对江苏赣榆丘陵山区生态修复区修复效果的总结分析,为赣榆县及周边地区的生态修复提供理论根据。结果表明:经过3年的生态修复,项目区内植物种群逐步增加,植被覆盖率逐年提高,从修复前的43.5%提高到96.1%。植物群落呈现多样性、稳定性,植被群落向良性循环发展,人工幼林长势良好。水土流失得到有效控制,土壤侵蚀量由2758t/km2减少到1369t/km2,减沙效益为50.4%。本项目仅进行3年的监测工作,对今后人工补植林成林后,该区的林草变化情况、植被群落的演替趋势、动物及土壤结构的变化等许多问题需要进一步监测,开展更深入的研究探讨。

The analysis on the restoration effect in the ecological restoration experimental zone at Ganyu hilly area of Jiangsu Province provided the theory basis for the ecological restoration of Ganyu County and its surrounded areas. The result shows that, after three years＇restoration, the plant population at the project area is increased gradually, with the vegetation coverage rated increased by years from 43.5 % before the restoration up to 96.1% after the restoration. The plant community appears the diversified and stable development for the positive circle with the good growth of the artificial young forest. Soil erosion has been effective controlled. The soil erosion amount has been reduced from 2 758 t/km^2 down to 1 369 t/km^2 , with the 50.4% of sediment reduction benefit. The monitoring to the Project has only passed three years, it is necessary for the further monitoring and deeper study on the changes of the forest and grassland, the succession trend of the plant community and the changes of the animal and soil structure, etc.