基于空间自相关的耕地质量空间分布特征研究——以江西省南昌县为例

发布时间：2018-02-11 10:50

本文关键词： 耕地质量空间分布空间自相关监测分区南昌县　出处：《浙江农业学报》2017年08期 　论文类型：期刊论文

【摘要】：为了掌握与分析耕地质量空间分布特征,加强耕地质量建设,完善耕地保护新格局,基于加权平均法、集中度指数、分形维数和空间自相关分析法,以耕地质量等别监测试点县——南昌县为研究区,引入国家自然等指数、利用等指数和经济等指数为空间变量,以耕地图斑为空间单元进行空间自相关分析,从县级和乡镇级尺度上探讨耕地质量的空间差异特征。结果表明,南昌县耕地质量呈现出西南高东北低的空间分布规律,耕地质量等指数Moran's I值表现为自然等指数经济等指数利用等指数。不同空间尺度下,耕地质量指数具有不同的空间关联度,自然等指数受空间尺度的影响最大,经济等指数其次,利用等指数最小。正相关HH型和LL型耕地以组团形式聚集分布,负相关HL型和LH型耕地则多以零星状分布。综合考虑南昌县耕地质量空间自相关类型,将耕地划分为常规监测区、综合监测区和重点监测区3个监测分区。研究结果可为区域耕地质量监测、主导限制型谱序、耕地保护与管理分区和空间优化布局等提供借鉴参考。
[Abstract]:In order to grasp and analyze the spatial distribution characteristics of cultivated land quality, strengthen the construction of cultivated land quality and perfect the new pattern of cultivated land protection, based on weighted average method, concentration index, fractal dimension and spatial autocorrelation analysis, Taking the pilot county of cultivated land quality and so on-Nanchang county as the research area, introducing the national natural iso-index, using the equal index and economic index as the spatial variable, taking the cultivated land map spot as the spatial unit, the spatial autocorrelation analysis is carried out. The spatial difference characteristics of cultivated land quality at county level and township level are discussed. The results show that the cultivated land quality in Nanchang County presents the spatial distribution law of southwest, high, northeast and low. The cultivated land quality index (Moran's I) is the natural equal index, the economic index and the utilization index. Under the different spatial scales, the cultivated land quality index has different spatial correlation degree, and the natural equal index is most affected by the spatial scale. The positive correlation HH type and LL type cultivated land cluster distribution, while the negative correlation HL type and LH type cultivated land distribution were scattered. Considering comprehensively the spatial autocorrelation type of cultivated land quality in Nanchang County, the economic equal index was the second, and the use of equal index was the smallest, and the positive correlation HH type and LL type cultivated land were clustered in the form of cluster. The cultivated land is divided into conventional monitoring area, integrated monitoring area and key monitoring area. The results can be used as reference for regional cultivated land quality monitoring, dominant restricted spectral order, cultivated land protection and management zoning and spatial optimization.
【作者单位】：江西农业大学江西省鄱阳湖流域农业资源与生态重点实验室/南方粮油作物协同创新中心;江西农业大学国土资源与环境学院;江西农业大学土地科学研究所;南京农业大学公共管理学院;
【基金】：国家自然科学基金项目(41361049) 江西省自然科学基金项目(20122BAB204012)
【分类号】：F323.211

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