ZHANG Han,ZHAO Xiaomin,OUYANG Zhencheng,et al.Spatial Disparity Features and Protection Zoning of Cultivated Land Quality Based on Spatial Autocorrelation—A Case Study of Shanggao County, Jiangxi Province[J].Research of Soil and Water Conservation,2018,25(01):304-312.
基于空间自相关的耕地质量空间差异特征及耕地保护分区——以江西省上高县为例
- Title:
- Spatial Disparity Features and Protection Zoning of Cultivated Land Quality Based on Spatial Autocorrelation—A Case Study of Shanggao County, Jiangxi Province
- Keywords:
- cultivated land quality; spatial distribution; spatial autocorrelation; regional protection of cultivated land; Shanggao County
- 分类号:
- F301.21
- 摘要:
- 为了掌握与分析耕地质量空间分布格局，切实提高耕地质量水平与加强耕地保护建设，选取耕地质量等别监测试点县上高县为研究区，运用加权平均法和空间自相关分析法，以国家级耕地质量指数为空间变量，从县级、乡镇级和村级等尺度上探讨了耕地质量的空间分异规律，最终基于耕地质量局部空间自相关分析结果提出了耕地保护分区方案。结果表明：（1）上高县耕地质量呈现出西南低东北高的空间分布规律，耕地质量等指数Moran’s I值表现为利用等指数 > 自然等指数 > 经济等指数，三者均呈显著的空间正自相关集聚态势。（2）随着空间尺度的不同，耕地质量指数具有不同的空间关联度，利用等指数受空间尺度影响较大，经济等指数其次，自然等指数最小。（3）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型耕地无明显的集中区域，多以零星状分布。（4）综合考虑上高县耕地质量3个层次的空间自相关类型及顺序组合，将耕地划分为6个耕地保护分区，并提出了相应的保护措施。研究结果可为区域高标准基本农田建设、耕地质量监测和耕地保护与管理分区提供借鉴参考。
- Abstract:
- To strengthen the construction of cultivated land quality and improve the new pattern of cultivated land protection, based on the weighted average method and spatial autocorrelation analysis to analyze the spatial characteristics of cultivated land quality, Shanggao County, the cultivated land quality monitoring experimental unit county, was selected as the study area. Introducing the land natural grade index, using grade index and economical grade index as the spatial variables, taking map spot of cultivated land as a unit of spatial autocorrelation analysis, we discussed and explored the differences of spatial characteristics of cultivated land quality at county, township and village scales, and put forward some kinds of protection measures based on local spatial autocorrelation. The results showed that:firstly, cultivated land quality index was low in the southwest and high in the northeast in Shanggao County; the Moran’s I value of land natural grade index was the highest, followed by the land economical grade index and land use grade index, cultivated land quality exhibited significant aggregation of global spatial distribution in Shanggao County; secondly, we found that different types of cultivated land quality indexes had different spatial correlation with a strong degree of concentration at different spatial scales; on the influence degree of spatial scales, land use grade index was stronger, land natural index came next, and land economical grade index was the weakest; thirdly, the positive spatial autocorrelation of cultivated land including the high-high type and the low-low type emerged as the shapes of cluster and had the powerful agglomeration in the form of group, while the negative spatial autocorrelation including the high-low type and low-high type was fragmentary distribution; finally, considering the spatial autocorrelation type of cultivated land quality in Shanggao County, we divided the cultivated land into six protection zones, and put forward a series of corresponding protection measures. The results of the study will provide a reference for well facilitating basic farmland construction, the regional cultivated land quality monitoring, cultivated land protection and management of partition, quality improvement and space pattern optimization.
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备注/Memo
收稿日期:2017-4-9;改回日期:2017-4-26。
基金项目:国家自然科学资助项目（41361049）；江西省自然科学资助项目（20122BAB204012）；土壤与农业可持续发展国家重点实验室（中科院南京土壤研究所）开放课题（0812201202）
作者简介:张晗(1992-),男,江西永丰人,硕士研究生,主要从事土地遥感与信息、土地利用规划和耕地质量监测等研究。E-mail:zhanghan0307@163.com
通讯作者:赵小敏(1962-),男,江西上高人,教授,博导,主要从事农业遥感与信息技术、土地规划和土地资源利用等研究。E-mail:zhaoxm889@126.com