| 摘要: |
| 南岭山地是国家25个重点生态功能区之一，但其土壤保持功能较弱。本文以南岭国家级自然保护区及其周边地区为例，分析气候、土壤、地形、植被、人类活动等因素对土壤保持的影响。研究发现，该区域兼有水力侵蚀和冻融侵蚀；大东山花岗岩风化的南岭土壤易受流水侵蚀；山体高差较大、坡度较陡且水系发育，导致水流冲刷能力极强；因此该地非常容易诱发水土流失。而不合理的人类活动，已对局部造成严重的水土流失。保护区森林植被的水土保持生态效益，保存了原本易受侵蚀的南岭土壤，实现了南岭的生态功能和价值。因此，南岭的森林植被是控制水土流失的决定性因素，也是实现土壤保持功能最核心的因子。 |
| 关键词: 植被 南岭山地 水土流失 影响因素 |
| DOI： |
| 投稿时间：2018-04-01修订日期：2018-04-08 |
| 基金项目:国家自然科学基金等 |
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| Soil Retention Function of Forest in NanLing Mountain |
| Wen Meili,Yang Long,Wang Jun,Fu Shuqing,Zhang Yuling,Huang Yuhui,Gan Xianhua |
| (Guangdong Open Laboratory of Geospatial Information Technology and Application,Guangzhou Institute of Geography,Guangzhou;Guangdong Province Key Laboratory of Silviculture, Protection and Utilization Guangdong Academy of Forestry) |
| Abstract: |
| NanLing Mountain is one of the 25 key important ecological functions zones in China, but. However, its soil retention function was weak. Taking Nanling National Nature Reserve and its surrounding areas as an example, this paper analyzed the effects of climate, soil, topography, vegetation and human activities on soil retention. It was found that (1) the region had both hydraulic erosion and freezing and thawing erosion, and; (2) the weathered Nanling soil of Dadongshan granite was easily eroded by water; (3) the higher altitude difference and steeper gradientmountain height difference was larger, the gradient was steeper, and the developed water system developed, which resulted in the very stronger water erosion. Therefore, the soil erosion was easily induced in Nanling Mountain. Besides, Uunreasonable human activities had caused serious locality soil erosion on the part. The ecological benefits of soil retention of forest vegetation in these areas had preserved the original eroded Nanling soil and realized the ecological function and value of Nanling. Therefore, the forest vegetation in Nanling was the decisive factor to control soil erosion and the core factor to realize soil retention. |
| Key words: Forestry NanLing mountain soil erosion influencing factors |
