Spatial Heterogeneity of Soil pH and Chromium Content in Tea Plantations in Plateau Mountainous Areas: a Case Study of Guiding County, Guizhou Province

WANG Zonglei; XU Ying; LI Zuowei; WEN Ximei; ZHU Dong; ZHAN Tianli

doi:10.12101/j.issn.1004-390X(n).202208025

JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science） > 2024 > 39(4): 159-165. > DOI: 10.12101/j.issn.1004-390X(n).202208025

WANG Zonglei, XU Ying, LI Zuowei, et al. Spatial Heterogeneity of Soil pH and Chromium Content in Tea Plantations in Plateau Mountainous Areas: a Case Study of Guiding County, Guizhou Province[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2024, 39(4): 159-165. DOI: 10.12101/j.issn.1004-390X(n).202208025

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Spatial Heterogeneity of Soil pH and Chromium Content in Tea Plantations in Plateau Mountainous Areas: a Case Study of Guiding County, Guizhou Province

1.
Guizhou First Institute of Surveying and Mapping, Guiyang 550003, China
2.
Guizhou Institute of Mountain Resources, Guiyang 550001, China
3.
Guizhou Environmental and Engineering Appraisal Center, Guiyang 550003, China

More Information

Received Date: August 16, 2022
Revised Date: July 04, 2024
Accepted Date: July 24, 2024
Available Online: July 29, 2024
Published Date: August 20, 2024

Graphical Abstract

Abstract

Abstract

Purpose
To investigate the spatial heterogeneity and driving factors of soil pH and heavy metal chromium (Cr) content in tea plantations in plateau mountainous areas, providing a scientific basis for high-yield and high-quality tea cultivation.
Methods
Soil samples from 423 tea plantations in Guiding County, Guizhou Province were collected. Geostatistics and semivariance function models were used to explore the spatial heterogeneity of soil pH and Cr in the tea plantations. Random forest algorithm was used to study the driving factors of Cr content variations under different pH conditions.
Results
74% of soil samples in plateau mountainous tea plantations had a pH value between 4.5 and 6.0, suitable for tea cultivation. The Cr content in the soil was within safe levels. The soil pH value decreased gradually from southwest to northeast, showing a clear zonal distribution. The spatial distribution of soil heavy metal Cr decreased gradually from north to southeast, with low-value patches mostly appearing in the southeast and high-value patches concentrated in the central-western region.
Conclusion
Different soil pH values have varying impacts on Cr content. In tea plantation soils with pH≤5.5, soil pH has the greatest impact on Cr content; in soils with 5.5<pH≤6.5, soil particles have the greatest impact on Cr content.
- tea plantation,
- soil,
- pH,
- heavy metal,
- chromium

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References (31)

References

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Spatial Heterogeneity of Soil pH and Chromium Content in Tea Plantations in Plateau Mountainous Areas: a Case Study of Guiding County, Guizhou Province

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