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Carbon Distribution Characteristics and Sequestration Potential of Various Land-Use Types in a Stony Soil Zone of the Arid Mountainous Regions on the Eastern Tibetan Plateau

Author

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  • Yunwei Han

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China
    Department of Culture and Tourism, Taiyuan University, Taiyuan 237016, China)

  • Qing Wang

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

  • Fucheng Li

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

  • Yalin Guo

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

  • Songtao Shen

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

  • Guohui Luo

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

  • Yuting Zheng

    (School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621002, China)

Abstract

In arid mountainous areas with stony soils in the Eastern Tibetan Plateau, intensively managed orchards (which include the need for plowing, irrigation, and soil stone removal), eco-forests, and grasslands, all converted from croplands, are becoming increasingly popular. We randomly collected soil samples at 0–15, 15–30, 30–45, and 45–60 cm depths from the four land-use types on the northern and southern slopes in the region. Differences in soil organic carbon (SOC) content/stock, soil water content (SWC), and rock fragment content (RFC) in land-use types and slopes were analyzed using two-way ANOVA. The factors’ contributions to SOC variation were assessed using mixed-effect models. Results showed the following: (1) In topsoil (0–30 cm), SOC contents followed the order eco-forest > orchard > grassland ≈ cropland; in subsoil (30–60 cm), the order was orchard > eco-forest > cropland ≈ grassland. SOC stocks (0–60 cm) were higher in orchards (93.72 Mg ha −1 ) and eco-forests (92.44 Mg ha −1 ) than in grasslands (53.65 Mg ha −1 ) and croplands (53.05 Mg ha −1 ). Contributions of SOC stocks at the 0–15 cm depth level to total SOC were above 40% for GL and EF and between 27 and 35% for OL and CL; at the 45–60 cm level, OL contributed 16–20% and was higher than 10–15% for the other land-use types. (2) Eco-forests and grasslands showed increased SOC contents/stocks at all soil layers on the northern slope than on the southern one. Orchards and croplands, however, showed no differences in contents between slopes. (3) Land-use types, TN, SWC, RFC, slope aspect, and management practices significantly affected SOC variation. Our results suggest that forest plantations (orchards and eco-forests) in arid mountainous regions, through active management practices (e.g., irrigation and fertilization), are vital for improving soil carbon sinks and achieving peak carbon/carbon neutrality goals.

Suggested Citation

  • Yunwei Han & Qing Wang & Fucheng Li & Yalin Guo & Songtao Shen & Guohui Luo & Yuting Zheng, 2023. "Carbon Distribution Characteristics and Sequestration Potential of Various Land-Use Types in a Stony Soil Zone of the Arid Mountainous Regions on the Eastern Tibetan Plateau," Sustainability, MDPI, vol. 15(20), pages 1-13, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:20:p:14721-:d:1257193
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    References listed on IDEAS

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    1. Yongge Li & Wei Liu & Qi Feng & Meng Zhu & Jutao Zhang & Linshan Yang & Xinwei Yin, 2022. "Spatiotemporal Dynamics and Driving Factors of Ecosystem Services Value in the Hexi Regions, Northwest China," Sustainability, MDPI, vol. 14(21), pages 1-21, October.
    2. Qiang Liu & Hongwei Xu & Haijie Yi, 2021. "Impact of Fertilizer on Crop Yield and C:N:P Stoichiometry in Arid and Semi-Arid Soil," IJERPH, MDPI, vol. 18(8), pages 1-12, April.
    3. Nikolaos V. Paranychianakis & Giorgos Giannakis & Daniel Moraetis & Vasileios A. Tzanakakis & Nikolaos P. Nikolaidis, 2021. "Crop Litter Has a Strong Effect on Soil Organic Matter Sequestration in Semi-Arid Environments," Sustainability, MDPI, vol. 13(23), pages 1-14, November.
    4. Zhang, Fangfang & Wei, Ya'nan & Bo, Qifei & Tang, An & Song, Qilong & Li, Shiqing & Yue, Shanchao, 2022. "Long-term film mulching with manure amendment increases crop yield and water productivity but decreases the soil carbon and nitrogen sequestration potential in semiarid farmland," Agricultural Water Management, Elsevier, vol. 273(C).
    5. Eleni Sofoulaki & Vasileios A. Tzanakakis & Georgios Giannopoulos & Iosif Kapellakis & Emmanouil Kabourakis & Theocharis Chatzistathis & Nikolaos Monokrousos, 2023. "Different Contribution of Olive Groves and Citrus Orchards to Soil Organic Carbon Sequestration: A Field Study in Four Sites in Crete, Greece," Sustainability, MDPI, vol. 15(2), pages 1-16, January.
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