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[1]Yang Lu,Liu Xiaofang,Zhang Xiumin,et al.Impact of Long-Term Caragana korshinskii Plantation on Root Distribution and Soil Water-Carbon Dynamics in Northwestern Shanxi[J].Research of Soil and Water Conservation,2024,31(06):199-206,212.[doi:10.13869/j.cnki.rswc.2024.06.024]

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Impact of Long-Term Caragana korshinskii Plantation on Root Distribution and Soil Water-Carbon Dynamics in Northwestern Shanxi

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 06 Page number: 199-206,212 Column: Public date: 2024-12-10

Title:: Impact of Long-Term Caragana korshinskii Plantation on Root Distribution and Soil Water-Carbon Dynamics in Northwestern Shanxi

Author(s):: Yang Lu, Liu Xiaofang, Zhang Xiumin, Ju Jiamin, Chang Fuqiang, Yang Zepeng, Zhao Yonggang; (College of Life Sciences, Shanxi Normal University, Taiyuan 030031, China)

Keywords:: Caragana korshinskii; root characteristic parameters; water deficit effect; soil organic carbon

CLC:: S154.4

DOI:: 10.13869/j.cnki.rswc.2024.06.024

Abstract:: [Objective]This study aims to explore the interaction between deep soil water, carbon and roots of artificial Caragana korshinskii with different planting years in northwest Shanxi Province, and to provide a theoretical basis for artificial vegetation restoration in the loess hilly region. [Methods]Caragana korshinskii forests with different planting years(20, 40, 60 years)were used as the research objects. The water content, organic carbon and root characteristic parameters of the 0—300 cm soil layer were measured, and the relationship between the three was analyzed. [Results](1)Compared to barren grasslands, long-term Caragana korshinskii cultivation(over 40 years)reduced soil moisture content across the profile while increasing soil organic carbon content. The deficit in soil moisture primarily occurred at depths of 0—60 cm and 200—300 cm, whereas the organic carbon content was predominantly distributed within the 0—60 cm depth. Caragana korshinskii planting significantly enhanced root characteristic parameters within the 0—60 cm profile, with root biomass accounting for 50% of the total in the 0—300 cm soil layer.(2)Within the 0—60 cm soil layer, organic carbon exhibited a significant negative correlation with soil moisture(p<0.01)and a positive correlation with root volume density(p<0.05); in the 60—200 cm layer, soil moisture showed a significant negative correlation with organic carbon, root surface area density, and root volume density(p<0.05); in the 200—300 cm layer, soil moisture was significantly correlated positively with root parameters(p<0.05). Multivariate regression and path analysis indicated that root volume density and soil moisture were principal factors influencing organic carbon, with higher root volume density and lower soil moisture contributing to an increase in soil organic carbon. [Conclusion]After long-term planting of Caragana korshinskii in the loess hilly area of northwest Shanxi, the increase in surface root characteristic parameters promoted soil organic carbon accumulation, but aggravated the consumption of surface soil water and prompted the root system to grow deeper to adapt to water conditions. It emphasizes the necessity to consider the cumulative effects of vegetation planting duration and soil depth on soil moisture, organic carbon, and root characteristics in regional vegetation construction efforts.

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Last Update: 2024-12-10