鄱阳湖地区耕地利用转型空间分异及其影响因素分析

摘要

为鄱阳湖区域耕地资源的合理规划及利用提供参考,以鄱阳湖地区具有代表性的县域为例,依据江西省各市统计年鉴的相关数据,从耕地利用的2种形态(耕地利用空间形态转型、耕地功能形态转型),借助空间自相关分析区域内耕地利用转型的空间分异特征,并用GWR模型分析耕地利用转型空间分异影响因素的效用,确定主要影响因子.结果表明:鄱阳湖地区耕地利用转型整体呈一定的空间集聚性,耕地功能转型呈较明显的逐渐增强空间正相关效应.从局部看,县域空间转型的异质性较为明显,但各县域耕地功能转型的局部空间自相关性不高,空间分异规律不明显.每个影响因子对耕地利用转型的影响程度不一,影响耕地利用空间转型的主导因素是地均GDP,且随着地均GDP的增大空间转型明显加快;影响耕地功能形态转型的主导因素是人均固定资产投资.%The spatial variation characteristics of regional cultivated land use transformation was analyzed by means of spatial auto-correlation analysis from two forms of cultivated land use (spatial form transformation and function form transformation) by taking the representative counties in Poyang Lake Region as the examples according to the related data from statistical yearbook of different cities in Jiangxi Province and the main factors influencing spatial variation of cultivated land use transformation are determined by GWR model analysis to provide a reference for rational planning and utilization of cultivated land resources in Poyang Lake Region.Results:The cultivated land use transformation presents a certain spatial aggregation in Poyang Lake Region overall and the cultivated function transformation shows an obvious gradual rising spatial positive correlation effect.The heterology of county spatial transformation is obvious from the partial angle.The partial spatial auto-correlation of cultivated land function transformation is not high in different counties,which indicates that the spatial variation regularity is not obvious.Each influencing factor has a different influencing degree to cultivated land use transformation.The leading factor influencing cultivated land use spatial transformation is per land GDP and the spatial transformation significantly speeds up with increase of per land GDP.The leading factor influencing cultivated land function form transformation is per capita fixed assets investment.