摘要
利用1986—2002年陇东地区耕地统计资料,对该区耕地资源利用与变化的基本特征、耕地数量变化的基本过程、空间差异、耕地流向以及耕地数量变化的主要驱动机制进行了分析。结果表明:(1)16 a来陇东地区耕地数量呈明显的波动减少趋势,经历了缓慢减少—急剧减少—缓慢减少的变化过程。(2)耕地的主要流向是工矿用地、居民点和各类交通用地以及果园;耕地的增加主要是未利用土地的开垦。(3)经济发展、人口增长和政策是耕地面积减少的主要宏观驱动因子,耕地变化过程中的明显突变与国家宏观政策背景相关联,耕地快速减少在发生时间上与经济的快速增长基本同步,在空间分布上与地区经济发展速度水平的差异相一致。
The characteristics of arable-land resources and utilization, the basic processes and regional differences of changes in arable-land areas were revealed according to the statistics data of arable-land areas from 1986 to 2002 and the detailed investigation of land use in the recent 5 years. Also, the driving mechanism for the changes in the cultivated land areas was discussed. The main conclusions were as follows. （1） There was a trend of obvious fluctuant decrease in arable-land areas in the past 20 odd years. The changes of arable-lands underwent the process from a gentle decrease to a sharp decrease, then to a slow decrease. （2） The decreased arable-lands were mainly inverted to project and mine lands, residential areas, various traffic lands and orchards. The increased arable-lands mainly came from the exploitation and reclamation of non-utilized lands and the arrangement and resumption of project and mine lands. （3） The economic development, population growth and policies were the dominant macrodriving factors for the decrease in cultivated land areas. The obvious break in the change process of arable-lands was related to the national macro-policies. The rapid decrease of cultivated land areas coincided in time with the overheated economic growth resulting from the direct investment in fixed assets. Spatial distribution of the decrease in arable-lands matched the differences in speed and scale of economic growth in different regions of the Longdong Loess Pleteau.
出处
《水土保持通报》
CSCD
北大核心
2006年第4期16-20,81,共6页
Bulletin of Soil and Water Conservation
基金
教育部新世纪优秀人才培养计划项目
甘肃省教委资助项目(049B-08)
陇东学院重点资助项目(Sznk0222)
关键词
耕地变化
驱动力
陇东黄土高原
decrease in arable-lands
driving forces
Longdong Loess Pleteau
