摘要
研究了陕南地区1998～2004年土地利用类型结构、速度、程度以及生态承栽力时间和空间动态变化，利用回归分析方法研究了跌南地区汉中、安康、商洛“三市”土地利用程度与人均生态承载力的关系。结果表明，陕南地区耕地、水域面积总量及其比例急剧减小，林地、未利用土地情况相反；各种类型土地面积变化速度，时间和空间差异较大；土地利用程度不断降低；总生态承载力和人均生态承栽力逐年递减，耕地减少量与其余土体类型增量失衡致使总生态承载力降低。陕南“三市”土地利用程度和人均生态承载力回归分析表明两者之间符合Linear（拟合直线）模型，拟合程度较好，平行性明显，表明“三市”人均生态承载力在一定范围内随土地利用程度的减弱（增强）而有所降低（提高），且增减趋势基本相同。
This study aimed to figure out the dynamic change of land use （consists of structure,speed and degree） and ecological carrying capacity in Southern Shaanxi Province from 1998 to 2004, and analyze the relationship between the land use degree and percapita ecological carrying capacity in Hanzhong,Ankang and Shangluo City by regression analysis. The result showed that the area and its proportion of arable land, waters were obviously redueed,whieh was contrary to the station of forest land and unused land;there were obvious differences in land use change between time and space;land use degree decreased continuously;total and per-capita ecological carrying capacity declined annually,the former was due to the imbalance between the reduction of arable land and the increase of other land type. A regression analysis between the land use degree and per capita ecological carrying capacity was fit for Linear model,which has a better simulation degree, the per-capita ecological carrying capacity declined（increased） when the land use degree decreased （strengthened） in a certain scale.
出处
《安徽农业科学》
CAS
北大核心
2009年第3期1266-1270,共5页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金(50678147)项目资助
关键词
陕南
土地利用
生态承载力
动态变化
Southern Sbeanxi Province
Land use
Ecological carrying capacity
Dynamic change
