Differentiation of Mountainous Soil pH and Its Influencing Factors in Guizhou Province, China
Yang Ao 1,2
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School of Karst Science School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China
State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Provence, Guiyang, 550001, China
Guizhou Institute of Geo-Environment Monitoring, Guiyang 550081, China
Toxicity Testing Center of Guizhou Medical University, Gui’an New region, Guizhou 550025, China
Submission date: 2023-04-27
Final revision date: 2023-06-06
Acceptance date: 2023-09-21
Online publication date: 2023-11-17
Publication date: 2024-01-22
Corresponding author
Xiaohui Lu   

School of Karst Science School of Geography and Environmental Science, Guizhou Normal University, China
Pol. J. Environ. Stud. 2024;33(2):1277-1285
In the complex mountainous environment, it is valuable to explore the variation rule of soil pH for accurately managing soil pH and the sustainable use of soil. In this study, we collected 394,736 field surface soil samples and recorded the paired environmental conditions in Guizhou Province. The spatial autocorrelation, semi-variance model and geographical detector were employed to analyze the spatial structure characteristics and distribution pattern of soil pH. The results showed that the surface soil pH varies from 3.11 to 8.99, with the variation coefficient of 17.14%. Soil pH shows a patchy mosaic distribution pattern. The structural factors of climate, parent material, and topography play a determinant role in controlling pH differentiation. Geo detector analysis showed that the explanatory power of environmental factors for the soil pH differentiation is in the order of parent rock (0.0976) > altitude (0.0144) > soil temperature regime (0.0112) > land use (0.00503) > soil moisture regime (0.000812). The reciprocal effect of parent rock and altitude is noticeable.
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