摘要
中国北方风沙区是全球沙漠化发展和生态退化最为严重的地区之一。利用植被固沙是遏制沙化土地扩张和生态重建与恢复的主要途径,但人工植被的稳定维持是可持续性风沙治理所长期面临的挑战。作为人工植被生态系统管理的依据,对生态水文阈值的认识及界定具有重要的理论和实践意义。本文以固沙植被中人工种植的灌木和乔木(仅限东部沙区)的盖度与深层土壤水分含量互馈互调作用的长期变化为依据,基于对中国不同气候带沙区典型人工植被系统生态和水文过程的模拟,通过建立生态水文模型初步界定了不同沙区适宜于人工植被生态系统管理的生态水文阈值,对现有沙区固沙植被的生态系统管理和未来风沙区植被建设具有一定的借鉴意义。
The desert area in northern China,under wind-blown sand hazards and with desertification development and ecological degradation,is one of the most serious areas in the word.Using plant sand-fixation is the main approach to contain the expansion of sandy land and to recover and rebuild the ecological environment.However,the stability maintenance of artificial vegetation is a challenge of sustainable management of sand hazards.As the basis for artificial vegetation ecosystem management,how to understand and define the eco-hydrological threshold has important theoretical and practical significance.We built an eco-hydrological model to describe the interaction effect between the deep soil moisture and the coverage of artificial sandbinding shrub or trees（for only eastern desert regions）.We used the model to simulate the eco-hydrological process in the typically artificial sand-binding vegetation ecosystem of different climate zones of China desert.Based on these results,we defined the appropriate eco-hydrological threshold of artificial vegetation ecosystem management in different sandy areas.It has a certain reference value to the ecosystem management of existing sand-binding vegetation and future vegetation construction in desert areas.
出处
《中国沙漠》
CSCD
北大核心
2017年第4期678-688,共11页
Journal of Desert Research
基金
国家自然科学基金项目(41661022)
国家重点基础研究发展计划项目(2013CB429900)
关键词
中国北方风沙区
人工固沙植被
水分平衡
固沙植被稳定性
生态水文阈值
生态重建
desert area in northern China
artificial sand-binding vegetation
soil water balance
stability of sand-binding vegetation
eco-hydrological threshold
ecological reconstruction
