摘要
厘清西北干旱区不稳定耕地的资源清单对于维持区域生态平衡至关重要。当前,全国对不稳定耕地的定义和分类比较笼统,难以突出西北干旱区不稳定耕地的特征。本文阐明了西北干旱区不稳定耕地的概念,并根据不稳定因素构建了分类体系。同时以昌吉州为例,分析不稳定耕地的数量、质量与空间分布。结果表明:①昌吉州不稳定耕地面积为14.56万hm^(2),占耕地总面积的22.37%。生态不稳定型、生产不稳定型、混合不稳定型和社会经济不稳定型分别占不稳定耕地总面积的36.54%、34.03%、17.94%和11.49%。②昌吉州不稳定耕地以低等地为主,四至六等地合计占不稳定耕地总面积的79.96%。研究结果可为西北干旱区不稳定耕地的深入理解提供参考,同时为案例地区耕地资源的有效管理提供科技支撑。
It is essential to clarify the resource list of unstable cultivated land for maintaining ecological balance,ensuring regional food security and promoting the sustainable development of economy and society in the arid areas of Northwest China.At present,the definition and classification of unstable cultivated land in China is relatively general,and the resource endowment of different regions is quite different,so it is difficult to highlight the characteristics of unstable cultivated land in the arid areas of Northwest China with a national standard classification system.In this paper,the connotation and concept of the unstable cultivated land in the arid areas of Northwest China were expounded,and the classification system was constructed according to the unstable factors.Taking Changji Prefecture as a typical case,this paper analyzed the quantity,quality and spatial distribution of unstable cultivated land.The main results are as follows.(1)The definition of unstable cultivated land in the arid areas of Northwest China is as follows:limited by ecological factors(desertification,soil salinization,etc.),or production factors(water,soil,etc.),or socio-economic factors(location,farmland infrastructure,etc.),it is difficult to stabilize production,and continuous cultivation will threaten ecological security of cultivated land ecosystem and surrounding environment,and there is uncertainty in the follow-up land use types.Unstable cultivated land can be divided into four types:productive unstable type,ecological unstable type,socio-economic unstable type and mixed unstable type.(2)The area of unstable cultivated land was 14.56 ten thousand hm^(2)in Changji Prefecture,accounting for 22.37%of the total cultivated land area.Ecological unstable type,productive unstable type,mixed unstable type,and socio-economic unstable type accounted for 36.54%,34.03%,17.94%and 11.49%of the total area of unstable cultivated land,respectively.(3)The unstable cultivated land was mainly at low-grade level in Changji Prefecture,and the fourth
作者
张红旗
李达净
ZHANG Hongqi;LI Dajing(Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《地理研究》
CSSCI
CSCD
北大核心
2021年第3期597-612,共16页
Geographical Research
基金
国家自然科学基金项目(41561070)。
关键词
不稳定耕地
概念
分类体系
西北干旱区
unstable farmland
concept
classification system
arid areas of Northwest China
