【作者】 陈百明； 宋伟；

【Author】 Chen Baiming,Song Wei (Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101)

【机构】 中国科学院地理科学与资源研究所；

【摘要】 为了分析近年来我国不同区域的土地质量现状与变化态势,本文依据全国农用地(耕地)分等成果中的自然等评价成果,通过耕地数量在1998～2006年间的时空分布变化推算所引起的自然等别变化。研究表明,不同区域的耕地质量差异较大,自然等别总体上仍然处于偏低的水平。同时由于生态退耕退掉了大量低等劣质耕地,其数量远大于同期建设占用的优质耕地;土地整理提高了部分耕地的质量,所以使得多数土地利用区的耕地质量趋于改善,从而在整体上促使全国平均的自然等别略有提高。更多还原

【Abstract】 The purpose of this paper is to analyze the status quo and change of land quality of recent years in different regions.Based on the natural grade of farmland classification evaluation results in China,through calculating the natural grade changes caused by spatial and temporal distribution of the change of farmland amount of different regions during 1998 - 2006.The results indicate:a big difference was found between regions,however,the farmland quality is low as a whole;the area of ecological returning farmland with poor quality is much higher than that of high quality cultivated land which is occupied by construction,as well, land consolidation which enhanced farmland quality in part,so that the farmland quality has been improved in most of the regions,so which can push up slight increase of general farmland quality in the whole country.更多还原