山区耕地边际化特征及其动因与政策含义（英文）

编号 zgly0001584751

文献类型 期刊论文

文献题名 山区耕地边际化特征及其动因与政策含义（英文）

作者 邵景安  张仕超  李秀彬 

作者单位 CollegeofGeographicalScience  ChongqingNormalUniversity  KeyLaboratoryofSurfaceProcessandEnvironmentRemoteSensing  intheThreeGorgesReservoirArea  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS 

母体文献 Journal of Geographical Sciences 

年卷期 2015年06期

年份 2015 

分类号 F323.211 

关键词 farmlandmarginalization  features  influencingfactors  policyimplications  mountainousarea 

文摘内容 Based on SPOT-5 images, 1:1 million topographic maps, the maps of the returning farmland to forest project and the Chongqing forest project, social and economic statistics, etc., this paper identifies the features and factors influencing farmland marginalization. The results showed:(1) During 2002–2012, the rate of farmland marginalization was 16.18%, which was mainly found in the high areas of northern Qiyao mountains and the medium-altitude areas of southern Qiyao mountains. And this farmland marginalization will increase, associated with non-agriculturalization of rural labourers and aging of the remaining labourers.(2) Elevation, distance radius from villages and road connections had a great influence on farmland marginalization. Farmland marginalization rates showed an increasing trend with the increase of elevation, and 60.88% of the total farmland marginalization area is found at an altitude greater than 1000 m above sea level. The marginalization trend also increases with slope and distance from the distribution network.(3) Farmland area per labourer and the average age of farm labourers were major factors driving farmland marginalization. Farmland transfer and small agricultural machinery sets affect farmland marginalization with respect to management and productivity efficiency.(4) Farmland with comparative- disadvantage-dominated marginalization accounted for 55.32% of the total farmland marginalization area, followed by location-dominated marginalization(33.80%).(5) According to the specifics of each real situation, different policies are suggested to mitigate the marginalization. A continuous marginalization policy will encourage the return of farmland to forest in terrain-dominated marginalization. An anti-marginalization policy is suggested to create new rural accommodation and improve the rural road system to counteract terrain-dominated marginalization. And another anti-marginalization policy is planned to improve management and micro-mechanization for comparative-disadvantage-dominated marginalization. A new idea was developed to integrate high resolution remote sensing and statistical data with survey information to identify land marginalization and its driving forces in mountainous areas.