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Influence of Irrigation on Vertical Migration of Soil Organic Carbon in Arid Area of Inland River

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  • Wenhao Zhang

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Guofeng Zhu

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Qiaozhuo Wan

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Siyu Lu

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Ling Zhao

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Dongdong Qiu

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

  • Xinrui Lin

    (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
    Shiyang River Ecological Environment Observation Station, Northwest Normal University, Lanzhou 730070, China
    Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou 730070, China)

Abstract

Soil organic carbon is very important to increase crop yield. Understanding the composition changes and migration characteristics of SOC under different irrigation conditions in arid oasis areas is of great significance for the sustainable development of agro-ecosystem and the estimation of carbon balance of farmland ecosystem in arid areas. In this paper, classical statistics and geostatistics were used to study the leaching characteristics and migration laws of soil organic carbon under different irrigation conditions in Minqin Oasis, and the leaching amount and loss process and mechanism of SOC under different irrigation conditions were quantified. The research results showed that: (1) Irrigation increased the average 0–100 cm SOC content. After irrigation, SOC content decreased first and then increased with the increase in soil depth, with the maximum value of 8.56 g/kg and the minimum value of 1.82 g/kg. Compared with that before irrigation, SOC content in 0–30 cm surface layer was in leaching state, SOC content in 30–70 cm surface layer was accumulated, and SOC content in 70–100 cm surface layer had no obvious change. (2) Water was an important factor affecting soil carbon. The greater the irrigation amount, the higher the carbon leaching rate and the greater the migration amount. The SOC content in 0–30 cm soil layer was most significantly affected by irrigation, and the migration amount of SOC gradually decreased with the increase in soil depth. The maximum leaching rate of SOC was 36.8%, the minimum leaching rate was 13.5%, and its average leaching rate was 23.4%. (3) Due to the influence of soil infiltration rate under water, SOC content in different irrigation periods showed that the greatest SOC occurred in the 0–70 cm layer, and SOC content in soil was basically the same as that in non-irrigated areas on the fifth day after irrigation. (4) Precipitation, plastic film mulching, soil physical and chemical properties and other environmental factors were important factors affecting the migration and change in SOC content.

Suggested Citation

  • Wenhao Zhang & Guofeng Zhu & Qiaozhuo Wan & Siyu Lu & Ling Zhao & Dongdong Qiu & Xinrui Lin, 2023. "Influence of Irrigation on Vertical Migration of Soil Organic Carbon in Arid Area of Inland River," Land, MDPI, vol. 12(8), pages 1-14, August.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:8:p:1532-:d:1208937
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    References listed on IDEAS

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    1. Martin Heimann & Markus Reichstein, 2008. "Terrestrial ecosystem carbon dynamics and climate feedbacks," Nature, Nature, vol. 451(7176), pages 289-292, January.
    2. Eric A. Davidson & Ivan A. Janssens, 2006. "Temperature sensitivity of soil carbon decomposition and feedbacks to climate change," Nature, Nature, vol. 440(7081), pages 165-173, March.
    3. Shurong Yang & Danrui Sheng & Jan Adamowski & Yifan Gong & Jian Zhang & Jianjun Cao, 2018. "Effect of Land Use Change on Soil Carbon Storage over the Last 40 Years in the Shi Yang River Basin, China," Land, MDPI, vol. 7(1), pages 1-9, January.
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