黑土耕作区土壤含水量空间自相关及农业生产分区

发布时间：2018-03-25 16:30

本文选题：黑土耕作区　切入点：土壤含水量　出处：《自然资源学报》2017年11期

【摘要】：论文以东北黑土耕作区土壤表层(0~20 cm)含水量为研究对象,基于3S技术和Moran指数进行空间自相关分析,掌握黑土区土壤表层含水量的空间自相关类型及其分布格局,划定农业生产中的优先区域,为农业生产中土壤含水量的分区管理、农业设施合理配置提供理论依据。结果表明:海沟河小流域土壤含水量空间差异大,变异程度为中等变异,受人类活动等随机因素的影响较大;全局空间自相关系数为0.417 7,表现出较强的正自相关特征,且不同方向存在较大差异;局部空间自相关系数为0.374 4,局部空间自相关类型主要为H-H型(高-高关联)和L-L型(低-低关联),空间集聚特征明显,H-H型主要分布于研究区西北部地势平坦的地区,形成高含水量且高度空间自相关的格局,耕作优势突出,为农业生产中的优先区域,L-L型分布于东部山地与平原的过渡带,形成低含水量集聚的格局,为农业生产中的一般区域。基于土壤含水量空间自相关分布特征,进行农业生产区域的划定及分区管理具有重要的实践价值。
[Abstract]:Based on the spatial autocorrelation analysis based on 3s technique and Moran index, the spatial autocorrelation type and distribution pattern of soil surface water content in the black soil area of Northeast China were studied. The priority areas in agricultural production are delimited to provide theoretical basis for the zonal management of soil water content and the rational allocation of agricultural facilities in agricultural production. The results show that the spatial variation of soil water content in Haigou River watershed is large and the variation degree is moderate. The global spatial autocorrelation coefficient is 0.417, showing strong positive autocorrelation characteristics, and there are great differences in different directions. The autocorrelation coefficient of local space is 0.374. The main types of local spatial autocorrelation are H-H type (high-high correlation) and L-L type (low-low correlation). The pattern of high water content and high spatial autocorrelation was formed, the advantage of tillage was prominent, and the L-L type was distributed in the transitional zone between the eastern mountainous area and the plain, forming the pattern of low water content concentration. Based on the spatial autocorrelation distribution of soil water content, it is of great practical value to demarcate and manage agricultural production areas.
【作者单位】：东北农业大学资源与环境学院;武汉市江岸区新村街道办事处;黑龙江省环境科学研究院;
【基金】：国家重点研发计划课题子课题(2016YFD0201009) 国家自然科学基金项目(41471228) 东北农业大学青年才俊项目(14QC30)~~
【分类号】：S152.7

【相似文献】