%0 Journal Article
%T Spatial Features of Occupation and Supplement Cropland Based on Topographic Factors in China from 2008-2010<br>近几年来中国耕地占补的空间分异特征
%A LI Yuejiao
%A YANG Xiaohuan
%A CHENG Chuanzhou
%A WANG Jing
%A <br>李月娇
%A 杨小唤
%A 程传周
%A 王静
%J 资源科学
%D 2012
%I 
%X Terrain is one of the most important environmental factors affecting human life, production, land resource structure, and changes in these. Based on topographic data and land use dynamic change from 2008 to 2010 we analyzed China’s terrain features related to occupation and supplemental cropland using elevation, slope, and degree of fragmentation. We found a spatial distribution pattern of occupation cropland in southern China and supplemental cropland in northern China. The Heihe-Tengchong line still plays an important role, to the west of the line supplement cropland was more common than occupation cropland, while east of the line the opposite is true. Xinjiang had more supplemental cropland, accounting for 76.8% of the supplemental cropland in China. The occupation of cropland in the Yangtze River Delta, Beijing-Tianjin-Hebei and other areas is serious. Occupation and supplement cropland of Gansu, Inner Mongolia, Heilongjiang and other northern areas are interlaced in distribution and almost in dynamic balance. The barycenter of cropland moved northwest, from the view of China’s cropland dynamic change characteristics. China’s cropland occupation occurred mainly in northern and central China, while supplemental cropland is mainly in northern and northwest China. Provinces that produced large quantities of food occupied more cropland, but supplement was not in place. The terrain elements of occupation cropland are of better quality, while terrain elements of supplement cropland are poorer quality and not conducive to the growth of crops. From topographical distribution characteristics of occupation-supplement cropland, the slope of occupation cropland is less than the average slope of the cropland across the province. The slope of supplemental cropland was above the average slope of the provincial cropland for 38.7% of provinces. Relationships among elevation, fragmentation degree and occupation-supplement cropland followed a similar pattern to that found for slope. China occupies a large number of high quality cropland resources in the process of accelerated urbanization, and cannot supplement the same amount and quality of cropland in the process of cropland compensation. Supplemental cropland occurs mainly as scattered plots and this greatly weakens the production capacity of cropland, reduces the large-scale production value of cropland, and increases the agricultural input-output ratio.
%K China
%K Cropland occupation
%K Cropland supplement
%K Topographic factors
%K Spatialtemporal feature<br>中国
%K 耕地占补
%K 地形要素
%K 时空特征
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=F08440544A6634467A0F6518FF6C0466&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=9CF7A0430CBB2DFD&sid=C8223A846BBA5EA7&eid=BCF7BCA77FA8F9BA&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=30