陕北地区土地利用与生态承载力动态变化分析

Dynamic Change of Land Use and Ecological Carrying Capacity in Northern Shaanxi Province

本文研究了陕北地区2003-2007年土地利用类型结构、动态度、程度以及生态承载力的时空动态变化,并采用回归分析方法研究了陕北地区延安市、榆林市土地利用程度与人均生态承载力的关系。结果表明,陕北地区耕地、牧草地、未利用土地面积总量及其比例减小,园地、林地、居民点及工矿用地、交通用地、水域面积增加;土地利用程度不断降低,总生态承载力和人均生态承载力逐年递减。论文还分析讨论了土地利用动态变化对生态承载力的影响以及相应的对策建议等问题。

This paper studied the spatial temporal dynamic change of land use in structure,dynamic trend,degree and ecological carrying capacity in northern Shaanxi Province from 2003 to 2007,and analyzed the relationship between the degree of land use and ecological carrying capacity percapita in Yan'an and Yulin by regression analysis.The result showed that the area and its proportion of arable land,grassland and unused land were reduced,and meanwhile the area of garden land,forest land,residential land,traffic land and water areas were increased;the degree of land use decreased continuously;total and per-capita ecological carrying capacity declined year by year.The paper also analysed and discussied the effect of land use dynamic change on ecological carrying capacity and the corresponding suggestions.