摘要
利用(Greographic information system,GIS)对贵州省146个茶园土壤采样点表层土壤锌含量进行克里金插值,与全省不同类型环境因子矢量数据进行空间叠加分析,探究茶园土壤锌含量空间异质性的影响因子。结果表明,贵州省茶园土壤锌含量在空间上自西向东空间分布上具有差异性。根据锌含量可分为低锌区(0~50 mg·kg^(-1))、中锌区(50~80 mg·kg^(-1))、高锌区(80~200 mg·kg^(-1))、预警区(>200 mg·kg^(-1)),高锌区面积占比最高为65.60%。全省茶园土壤锌含量空间块金系数达0.24,表明锌含量空间分布具有强烈自相关性。地理探测器结果表明岩性(0.30)、降水(0.25)、海拔(0.18)对茶园土壤锌含量空间异质性具有显著解释度。分区等级越高,碳酸盐岩占比越大。因此岩性是影响茶园土壤锌含量空间异质性的主要因素,降水和海拔进一步显著影响茶园土壤锌含量空间异质性;茶园土壤锌含量空间异质性受多种因素共同影响,锌含量分区有利于茶园土壤生态管理和土地资源利用。
Using GIS,kriging interpolation to assess the surface soil zinc content of 146 tea plantation sampling points in Guizhou Province.Spatial overlay analysis was conducted with vector data representing various environmental factors in Guizhou Province.The influencing factors of spatial heterogeneity in zinc content of tea plantation soils were studied.The results showed there were differences of spatial heterogeneity in zinc content of tea plantation soils from west to east in Guizhou Province.According to soil zinc content,the areas were classified into low zinc zone(0-50 mg·kg^(-1)),medium zinc zone(50-80 mg·kg^(-1)),high zinc zone(80-200 mg·kg^(-1)),and warning zone(>200 mg·kg^(-1)),with the highest proportion being 65.60%in the high zinc zone.The spatial auto-correlation coefficient for the entire province's tea plantation soil zinc content was 0.24,showing a strong spatial autocorrelation.The geographic detector results showed that lithology(0.30),precipitation(0.25),and elevation(0.18)significantly explained the spatial heterogeneity of zinc content in tea plantation soils.As the zoning level increased,the proportion of carbonate rock increased.Therefore,lithology was the primary factor to influence the spatial heterogeneity of zinc content in tea plantation soils,and precipitation and elevation further significantly affected the spatial heterogeneity of zinc content.The spatial heterogeneity of zinc content in tea plantation soils was influenced by multiple factors.Zoning of soil zinc content was beneficial for ecological management and land resource utilization of tea plantation soils.
作者
杨鉴
张珍明
陈祖拥
刘方
代洁
朱健
YANG Jian;ZHANG Zhenming;CHEN Zuyong;LIU Fang;DAI Jie;ZHU Jian(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China;College of Agriculture,Guizhou University,Guiyang 550025 China)
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2023年第12期21-31,共11页
Journal of Northeast Agricultural University
基金
国家自然科学基金项目(42367031)
贵州省百层次人才项目(GCC[2023]062)。
关键词
土壤锌
岩性
空间异质性
GIS
地理探测器
soil zinc
lithology
spatial heterogeneity
GIS
geographic detector
