Impact of Environmental Factors on Spatial and Temporal Heterogeneity of Soil pH in Anhui Province Based on GTWR Model
Based on soil and environmental data of Anhui Province in 1980,2010,and 2021,10 environmental factors related to soil pH were selected in terms of topography,vegetation,climate,and human activities,and the geographically and temporally weighted regression(GTWR)model was used to investigate the spatial and temporal heterogeneity of pH value in Anhui Province and their influencing factors.The results are as follows.(1)The mean values of soil pH in Anhui Province in 1980,2010,and 2021 are 6.40,6.35,and 5.84,respectively,and the soil shows a general trend of acidification,with the spatial distribution of soil being characterized by''acidity in the south and alkalinity in the north''.(2)The effects of environmental factors on soil pH value show spatial and temporal heterogeneity.The environmental factors that have the greatest influence on soil pH values in 1980,2010,and 2021 are average temperature in spring,average precipitation in autumn,and average temperature in spring,respectively.(3)In general,among the 10 environmental factors,the positive factors on pH value in Anhui Province from 1980 to 2021 are topographic humidity index,multi-scale valley flatness index,multi-scale ridge flatness index,and night light data,while the negative factors are altitude,slope,net primary productivity of vegetation,normalized vegetation index,average temperature in spring,and average precipitation in autumn.
万方数据
维普
