摘要
为指导典型岩溶区的农业生产,保障区域土壤资源的可持续利用,应用经典统计学与"3S"技术,将土壤电导率室内布点与实地监测相结合,研究果化示范区土壤电导率的空间自相关特征。结果表明,示范区土壤电导率的数值变异较大,属强度变异(CV>30%)。各深度土壤电导率的Moran指数呈正向的空间关联,其关联程度随土壤深度的增加而减小。果化示范区内土壤电导率绝大多数属于"低—低"空间集聚类型,低值区分布较为集中,且多被附近的低值区包围。5和10 cm深度土壤电导率的空间自相关尺度均为2 200 m;20和30 cm深度土壤电导率的空间自相关尺度分别为1 400和1 000 m。
In order to guide agricultural production,and provide references for the sustainable use of soil resources,the spatial auto-correlated characteristics of soil electric conductivity in Guohua demonstration zone were studied using classical statistics and＂3S＂technology,along with the combination of indoor sampling and field monitoring. It was shown that the variation of soil electric conductivity in Guohua demonstration zone was intensive（ CV 〉30%）.The spatial distribution of soil electric conductivity was positively auto-correlated with soil depth,which decreased with the increase of soil depth. Soil conductivity in the study zone belonged to the ＂low-low＂spatial agglomeration type. The spatial distribution of low-value area was relatively concentrated,and was mostly surrounded by adjacent low-value areas. The spatial autocorrelation distance of soil electric conductivity was 2 200 m in 5 and 10 cm soildepth,and was 1 400 and 1 000 m,respectively,in 20 and 30 cm soil depth.
出处
《浙江农业学报》
CSCD
北大核心
2014年第5期1290-1296,共7页
Acta Agriculturae Zhejiangensis
基金
国家科技支撑计划(2010BAE00739-02)
国家自然科学基金项目(41261005)
广西自然科学基金项目(2013GXNSFBA019222)
岩溶所所控项目(121237128100212)
桂林市科学研究与技术开发项目(20110120-6
20120122-2
20120125-1)
广西师范大学教育发展基金会教师成长基金(JS2012009
JS2012012)
广西教育厅科研项目(201106LX070
201203YB028
2013YB040)
岩溶生态与石漠化研究室对外开放基金(KERDC201201
KERDC201202)
惠州学院尹辉博士科研启动项目(C513.0206)
关键词
土壤
电导率
空间自相关
soil
electric conductivity
spatial autocorrelation
