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Forest and Grassland Resources Research >

2023 , Vol. 0 >Issue 4: 161 - 168

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2023.04.019

Research Briefing

Study on Potassium Release Characteristics of Aeolian Sandy Soil Under Different Land Use Patterns in Zhanggutai,Liaoning Province

  • Yili CAO ,
  • Xueli ZHANG ,
  • Gang LYU ,
  • Yuning AN ,
  • Linlin CHI ,
  • Yang LIU
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  • 1. Liaoning Institute of Sandy Land Management and Utilization,Fuxin,Liaoning 123000,China
    2. Liaoning Zhanggutai Desert Ecosystem Research Station,Fuxin,Liaoning 123000,China
    3. School of Environmental Science and Engineering,Liaoning Technical University,Fuxin,Liaoning 123000,China

Received date: 2023-05-15

  Revised date: 2023-07-21

  Online published: 2023-10-16

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Abstract

Understanding the characteristics of soil potassium release under different land use patterns is highly significant for impoving land use and fertility in Aeolian sandy soil.This study used indoor simulation experiments and equation fitting methods to investigate the process,influencing factors and kinetic characteristics of non-exchangeable potassium in the soil in Zhanggutai area of Liaoning Province.The findings revealed two distinct stages of potassium release:rapid release(18~90hrs)and slow release(90~520hrs),with generally higher release in the 0~<20 cm depth compared to the 20~40 cm depth.Different land use types exhibited a positive impact on non-exchangeable potassium release.Specifically,the broad-leaved forest demonstrated the highest cumulative release in the 0~<20 cm soil layer,while the paddy field exhibited the highest release in the 20~40 cm soil layer.The Elovich equation yielded the best fit for the release process of non-exchangeable potassium in Aeolian sandy soil,with determination coefficients(R2)ranging from 0.96 to 0.98 and standard errors(SE)ranging from 0.97 to 2.78.The subsequent best fit was observed with the first-order kinetic equation,and the equation parameters accurately described the potassium supply capacity of Aeolian sandy soil.Non-exchangeable potassium release in the surface soil was closely correlated with soil potassium content,while in the subsoil,it was associated with soil colloid content.

Key words： soil improvement; land use; sandy soil; non-exchangeable potassium release; dynamics

Cite this article

Yili CAO , Xueli ZHANG , Gang LYU , Yuning AN , Linlin CHI , Yang LIU . Study on Potassium Release Characteristics of Aeolian Sandy Soil Under Different Land Use Patterns in Zhanggutai,Liaoning Province[J]. Forest and Grassland Resources Research, 2023 , 0(4) : 161 -168 . DOI: 10.13466/j.cnki.lyzygl.2023.04.019

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