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Spatial Differentiation and Influencing Factors of Available Potassium in Cultivated Soil in Mountainous Areas of Northwestern Hubei Province, China

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  • Zhengxiang Wu

    (Key Laboratory of Natural Disaster and Remote Sensing of Henan Province, Nanyang Normal University, Nanyang 473061, China
    Hubei Provincial Key Laboratory of Geographical Process Analysis and Simulation, Central China Normal University, Wuhan 430079, China
    Rural Revitalization Institute, Nanyang Normal University, Nanyang 473061, China
    Nanyang Development Strategy Institute, Nanyang Normal University, Nanyang 473061, China)

  • Yong Zhou

    (Hubei Provincial Key Laboratory of Geographical Process Analysis and Simulation, Central China Normal University, Wuhan 430079, China)

  • Lei Xu

    (Rural Revitalization Institute, Nanyang Normal University, Nanyang 473061, China
    Nanyang Development Strategy Institute, Nanyang Normal University, Nanyang 473061, China)

Abstract

This research was conducted based on 701 soil sampling points in cultivated land (0–20 cm) in Shiyan, a mountainous area in northwest Hubei Province, China. The methods of classical statistics, geostatistics, and geodetector were used to explore the spatial differentiation characteristics and influencing factors of soil available potassium (AK) in cultivated land in Shiyan. The results showed that the soil AK content in the study area ranged from 17.00 to 350.00 mg/kg, with an average value of 118.95 mg/kg and a coefficient of variation of 54.06%, exhibiting moderate variability. The spatial structure was well fitted by a spherical model; the block gold effect was 0.027, indicating strong spatial autocorrelation; and spatial variation was mainly caused by structural factors. The spatial differentiation characteristics of the soil AK content are obvious; overall, there was a spatial distribution pattern of high in the northeast and low in the southwest. The factor detection results show that soil pH plays a dominant role in the spatial variation in soil AK in the study area, followed by parent material and annual average temperature. The interaction detection results show that each environmental factor exhibits non-linear or dual factor enhancement between factors, with soil pH slope ranking first in explanatory power. The explanatory power of the interaction between soil pH, parent materials, annual average temperature, and other factors dominates. In the process of the fine management of soil AK in cultivated land in the study area, when considering the influence of dominant factors, the impact of the interaction of various factors on the spatial variation in soil AK should also be taken into account. This study could provide a theoretical reference for improving the soil and farmland improvement, improving farmland quality in this area.

Suggested Citation

  • Zhengxiang Wu & Yong Zhou & Lei Xu, 2024. "Spatial Differentiation and Influencing Factors of Available Potassium in Cultivated Soil in Mountainous Areas of Northwestern Hubei Province, China," Sustainability, MDPI, vol. 16(17), pages 1-16, August.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:17:p:7311-:d:1463938
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    References listed on IDEAS

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    1. Xiaoyi Zhang & Yichen Ruan & Weihao Xuan & Haijun Bao & Zhenhong Du, 2023. "Risk assessment and spatial regulation on urban ground collapse based on geo-detector: a case study of Hangzhou urban area," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 118(1), pages 525-543, August.
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