CAJ | 학술논문

通过分析宁南半干旱黄土丘陵区生态系统退化原因,认为：持续干旱、植被退化、暴雨集中、土质疏松为黄土丘陵区生态系统退化的主要自然因素;滥垦、滥牧、乱砍、林草资源过度利用,以及人工植被建设规模与水资源承载能力不协调是黄土丘陵区生态系统退化的主要人为因素。结合宁南半干旱黄土丘陵区水土流失面积大、治理任务繁重、农村生产力水平低下、资金投入不足的现实,以植被快速恢复为突破口,根据立地类型特点,总结出了退化荒山生态系统恢复模式、退化农田林草建设模式和侵蚀沟综合治理模式。
통과분석저남반간한황토구릉구생태계통퇴화원인,인위：지속간한、식피퇴화、폭우집중、토질소송위황토구릉구생태계통퇴화적주요자연인소;람은、람목、란감、림초자원과도이용,이급인공식피건설규모여수자원승재능력불협조시황토구릉구생태계통퇴화적주요인위인소。결합저남반간한황토구릉구수토류실면적대、치리임무번중、농촌생산력수평저하、자금투입불족적현실,이식피쾌속회복위돌파구,근거입지류형특점,총결출료퇴화황산생태계통회복모식、퇴화농전림초건설모식화침식구종합치리모식。
The cause for the degradation of ecosystem in the semi-arid loess hilly area of southern Ningxia were analyzed.The results showed that the persistent drought,vegetation degradation,concentrated rainstorm and loose soil were the main natural factors;Excessive reclamation,overgrazing,hackle,excessive use of forest and grassland resources,as well as the uncoordinated artificial vegetation construction scale with the current water resources carrying capacity were the main human factors.Considering the serious soil erosion,low level productivities and insufficient capital investment in the semi-arid loess hilly area of southern Ningxia,a rapid vegetation restoration approach was chosen as a breakthrough.Based on the characteristics of different standing-type,the recovery model of degraded barren ecosystems,the forest and grassland construction model of degraded farmland and the comprehensive control model of erosion gulley were summarized.