耕地自然质量与景观指数耦合研究

发布时间：2018-02-26 04:30

本文关键词： 耕地自然质量空间分布景观指数空间自相关耦合性　出处：《西南农业学报》2017年08期 　论文类型：期刊论文

【摘要】：【目的】耕地是人类赖以生存的重要资源,也是土地资源中的精华。【方法】本文以Arc GIS10.1及其插件Patch Analyst为技术平台,对蒲阳镇在不同海拔高度下耕地景观格局特征进行了分析,并以2010年土地利用变更数据和耕地自然质量等别补充完善数据为基础,结合SPSS和Geo Da软件,进一步探讨了耕地自然质量与景观指数之间的耦合关系。【结果】(1)蒲阳镇耕地随海拔升高而斑块数量减少,平均规模变大,破碎化程度越低;这是因为海拔较低的区域地形相对平坦,人类耕作便利,生产活动频繁。(2)耕地自然质量与景观格局之间存在不同程度的相关性,耕地自然质量与斑块数呈现为显著的正相关,与景观百分比存在极弱的负相关性,仅-0.178;耕地自然质量与斑块平均大小、平均斑块形状指数均表现为显著的负相关。(3)耕地自然质量与景观格局具有一定的空间耦合性,斑块数量与耕地自然质量在空间上呈现局部空间的相似集聚性,景观百分比、斑块平均大小和平均斑块形状指数与耕地自然质量则呈现局部空间异质性,其中通过显著性检验的单元主要集中分布于蒲阳镇南部、北部以及西北方向。【结论】景观指数随着海拔变化出现规律性变化,耕地自然质量与各景观指数相关程度存在差异,二者呈现出空间同质性与异质性并存的现象。
[Abstract]:[objective] cultivated land is not only an important resource for human survival, but also the essence of land resources. [methods] based on Arc GIS10.1 and its plug-in Patch Analyst, the characteristics of cultivated land landscape pattern at different altitudes in Puyang Town were analyzed in this paper. On the basis of 2010 land use change data and cultivated land natural quality and other complementary and perfect data, combined with SPSS and Geo Da software, The coupling relationship between natural quality of cultivated land and landscape index was further discussed. [results] Puyang town cultivated land decreased with elevation, the average scale became larger, and the degree of fragmentation was lower; This is due to the relatively flat topography, convenient cultivation and frequent production activities in the lower elevation areas. There is a different degree of correlation between the natural quality of cultivated land and landscape pattern, and there is a significant positive correlation between the natural quality of cultivated land and the number of patches. There was a very weak negative correlation with the percentage of landscape, only -0.178; the natural quality of cultivated land was significantly negatively correlated with the average size of patches and the average patch shape index, and the average patch shape index was significantly negative correlation with the landscape pattern.) there was a certain spatial coupling between the natural quality of cultivated land and the landscape pattern. The amount of patches and the natural quality of cultivated land were similar to each other in local space, while the landscape percentage, the average patch size and the average patch shape index and the natural quality of cultivated land showed local spatial heterogeneity. The units that passed the significance test were mainly distributed in the south, north and northwest of Puyang Town. [conclusion] the landscape index changed regularly with the change of altitude, and the correlation degree between the natural quality of cultivated land and the landscape index was different. The two show the coexistence of spatial homogeneity and heterogeneity.
【作者单位】：四川师范大学西南土地资源评价与监测教育部重点实验室;四川师范大学地理与资源科学学院;
【基金】：国家自然科学基金项目(41371120) 四川省教育厅项目(16ZB0061)
【分类号】：P901;S159

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