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Forest and Grassland Resources Research >

2024 , Vol. 0 >Issue 5: 56 - 65

DOI: https://doi.org/10.13466/j.cnki.lczyyj.2024.05.007

Scientific Research

Soil Moisture and Carbon-Nitrogen Content on the Productivity of Flat Stubble Caragana korshinskii Forest in the Northwestern Shanxi Sandstorm Region

  • Yue XUE ,
  • Fengxia ZHAO ,
  • Yajie LI ,
  • Wenxia JI ,
  • Dan MENG
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  • College of Geographical Science,Shanxi Normal University,Taiyuan 030031,China

Received date: 2024-09-10

  Revised date: 2024-10-11

  Online published: 2025-04-18

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Abstract

Since the implementation of the Three-North(i.e.,Northeast China,North China and Northwest China)Shelterbelt Forest Program,Caragana korshinskii forest has become a crucial ecological barrier for wind prevention and sand fixation in the northwestern Shanxi sandstorm region.Therefore,investigating the impact mechanisms of soil moisture and carbon-nitrogen content on the aboveground net primary productivity(ANPP)of Caragana korshinskii under stubble disturbance is vital for local artificial vegetation construction and regional ecological stability.In this study,flat stubble Caragana korshinskii in its first-year in the northwestern Shanxi sandstorm region was used as the research object.Independent sample T-tests,linear regression models,and random forest models were employed to study the changes in productivity of flat stubble Caragana korshinskii and the effects of soil moisture and soil carbon-nitrogen content at different radial distances and soil layers on this productivity.1)The ANPP of the un-flat-stubble Caragana korshinskii was significantly higher than that of the flat stubble Caragana korshinskii 20~<40 cm (P<0.01).Soil moisture content at depth and 0.25 m from the stem(R2=0.456,P=0.016),soil total nitrogen content at 40~<60 cm(R2=0.363,P=0.038)and soil moisture content at depth and 0.5 m from the stem(R2=0.465,P=0.015)were significantly positively correlated with the productivity of flat stubble Caragana korshinskii forest.2)The random forest model results indicated that the most important soil limiting factor affecting ANPP changes after stubble disturbance was soil moisture content at 20~<40 cm depth and 0.5 m from the stem.The study suggests that future management of Caragana korshinskii forests should focus on soil moisture and carbon-nitrogen content at 20~<60 cm soil depth in root-dense areas,particularly the response of soil moisture at the 20~<40 cm soil layer to ANPP.This approach will optimize the restoration strategy of Caragana korshinskii forests in the northwestern Shanxi sandstorm region and enhance the sustainability of the ecological functions of the Three-North Shelterbelt Program.

Key words： flat stubble Caragana korshinskii forest; soil moisture; soil total carbon; soil total nitrogen; northwestern Shanxi sandstorm region

Cite this article

Yue XUE , Fengxia ZHAO , Yajie LI , Wenxia JI , Dan MENG . Soil Moisture and Carbon-Nitrogen Content on the Productivity of Flat Stubble Caragana korshinskii Forest in the Northwestern Shanxi Sandstorm Region[J]. Forest and Grassland Resources Research, 2024 , 0(5) : 56 -65 . DOI: 10.13466/j.cnki.lczyyj.2024.05.007

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