Distribution characteristics and ecological environment assessment of potassium in topsoil of cultivated land in Tongzi County, Guizhou Province

PAN Youliang; FEI Guangchun; ZHANG Zhonghua; YANG Enlin; WANG Xiaohong; LIU Hao; XIAO Bo; WU Peng; XIAO Yu

doi:10.12029/gc20220418001

2024 Vol. 51, No. 4

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PAN Youliang, FEI Guangchun, ZHANG Zhonghua, YANG Enlin, WANG Xiaohong, LIU Hao, XIAO Bo, WU Peng, XIAO Yu. 2024. Distribution characteristics and ecological environment assessment of potassium in topsoil of cultivated land in Tongzi County, Guizhou Province[J]. Geology in China, 51(4): 1304-1318. doi: 10.12029/gc20220418001

Citation:

PAN Youliang, FEI Guangchun, ZHANG Zhonghua, YANG Enlin, WANG Xiaohong, LIU Hao, XIAO Bo, WU Peng, XIAO Yu. 2024. Distribution characteristics and ecological environment assessment of potassium in topsoil of cultivated land in Tongzi County, Guizhou Province[J]. Geology in China, 51(4): 1304-1318. doi: 10.12029/gc20220418001

Distribution characteristics and ecological environment assessment of potassium in topsoil of cultivated land in Tongzi County, Guizhou Province

1.
College of Earth Science, Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Ministry of Natural Resources, Chengdu University of Technology, Chengdu 610059, Sichuan, China
2.
117 Geological Party, Guizhou Bureau of Geology and Mineral Exploration & Development, Guiyang 550018, Guizhou, China
3.
School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, Guizhou, China

Fund Project: Supported by the Geochemical Survey and Evaluation of Cultivated Land Quality in Tongzi County, Guizhou Province (No.2017−19).

More Information

Author Bio: PAN Youliang, male, born in 1989, master, engineer, engaged in the research of mineral exploration and geochemistry; E-mail: 952643364@qq.com
Corresponding author: FEI Guangchun, male, born in 1982, doctor, professor, engaged in the research of geochemistry and ore deposits; E-mail: feiguangchun07@cdut.cn.

Received Date: 18 April 2022

Revised Date: 20 May 2022

Publish Date: 25 July 2024

Abstract

Abstract

This paper is the result of Agricultural geological survey engineering.
Objective
Potassium is one of the three essential nutrients for plants and an important factor influencing soil fertility. Distribution characteristics of potassium in topsoil of cultivated land in Tongzi County was carried out to provide environmental geological background reference for county agricultural development and ecological environment evaluation.
Methods
Taking Tongzi County as the research area, this paper systematically discussed the content, spatial distribution, grade status and influencing factors of potassium and available potassium in surface soil samples obtained from cultivated land quality geochemical survey.
Results
The content of potassium in topsoil of cultivated land in the study area ranged from 2.50 to 49.60 g/kg, with an average of 20.30 g/kg, and the overall potassium content is mainly in medium, relatively rich and rich grade. The content of available potassium ranging from 22.40 to 684.00 mg/kg, with an average of 112.66 mg/kg, and the content of available potassium was in moderate to relatively deficient grade. Potassium and cation exchange capacity are positively correlated with available potassium, while the pH is negatively correlated with available potassium in topsoil of cultivated land.
Conclusions
The distribution of potassium and available potassium in topsoil of cultivated land in the study area is uneven. The geological factor plays an essential role in the content of potassium in topsoil of cultivated land, and the distribution of high−value and low−value of potassium is well integrated with the stratigraphic and tectonics of the study area. The content of potassium in topsoil of cultivated land is mainly controlled by the parent rock, which is relatively low in the limestone and forming soil. Large−scale potassium depletion in the southern part of the study area is related to the widely distributed of the Permian Maokou Formation limestone.
- cultivated land /
- geochemical survey of land quality /
- potassium /
- available potassium /
- parent rock /
- agricultural geological survey engineering /
- Tongzi County /
- Guizhou Province

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References

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