摘要
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。
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.
出处
《宁夏农林科技》
2012年第8期5-8,39,共5页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
国家自然科学基金"宁南黄土丘陵区苜蓿地旱化特征及其对土壤养分与微生物的影响"(41061034)
宁夏退耕还林工程效益监测与定量评价研究(2008-6)
宁夏自然科学基金"宁夏黄土丘陵区苜蓿地旱化评价及其对土壤微生物群落功能多样性的影响"(NZ1172)
