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Characteristics of Soil Moisture Variation in Agroforestry in Karst Region

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  • Zehui Wang

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

  • Kangning Xiong

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

  • Chenxu Wu

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

  • Ding Luo

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

  • Jie Xiao

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

  • Chuhong Shen

    (School of Karst Science, Guizhou Normal University, Guiyang 550001, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China)

Abstract

The special above-ground and underground dual structure in the karst area makes the capacity of surface water storage in this area poor. In water-limited ecosystems, soil moisture is the key to the survival of plants. Influenced by rainfall and soil texture, soil moisture variation characteristics of different vegetation types are different in slope land. Many researchers use rainfall simulation experiments to study the influence of soil water movement processes under rainfall patterns, but there are few studies under natural conditions. In this paper, wood trees, peach trees, flue-cured tobacco, and grassland were planted at the buffer zone boundary of Shibing, a World Heritage site, along different elevations in the depression of the research site. Peach trees and flue-cured tobacco were the main cash crops in the area. The soil layers of 0–0.15 m, 0.15–0.30 m, 0.30–0.45 m, 0.45–0.60 m, and 0.60–0.75 m were taken as research objects. Rainfall and soil moisture were monitored every ten minutes to study the variation of soil moisture of vegetation types under different rainfall patterns. Through the analysis of soil physicochemical properties and vegetation types, it was found that soil moisture changes were different in different land types. In general, shallow soil moisture (0~0.30 m) was more active in the wet season (CV > 10%) but tended to be stable in the dry season. The rainy season rainfall had the greatest influence on soil moisture change. The response level of soil moisture to rainfall of all vegetation types was grassland > peach trees > flue-cured tobacco. These results can provide ecological and economic suggestions for karst areas with large population distribution in China, so as to reduce the impact of rock desertification on this area.

Suggested Citation

  • Zehui Wang & Kangning Xiong & Chenxu Wu & Ding Luo & Jie Xiao & Chuhong Shen, 2023. "Characteristics of Soil Moisture Variation in Agroforestry in Karst Region," Land, MDPI, vol. 12(2), pages 1-16, January.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:2:p:347-:d:1048752
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    References listed on IDEAS

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    1. Ersahin, Sabit & Brohi, A. Resit, 2006. "Spatial variation of soil water content in topsoil and subsoil of a Typic Ustifluvent," Agricultural Water Management, Elsevier, vol. 83(1-2), pages 79-86, May.
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    Cited by:

    1. Xiaofei Pang & Binggeng Xie & Xuemao Zhang & Jing Xie & Jianyong Xiao, 2024. "Matched Relationships and Mechanisms of Water and Land Resources in Karst Mountainous Areas: A Review," Land, MDPI, vol. 13(6), pages 1-19, June.

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