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Long-Term Minimum Tillage and Straw Retention Promote Macroaggregate Formation, Carbon and Nitrogen Sequestration under Wheat-Maize Rotation in Northern China

Author

Listed:
  • Zhijie Ren

    (College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
    National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Xiaojie Han

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Zhidong Han

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Wenzhong Tian

    (Luoyang Academy of Agriculture and Forestry Science, Luoyang 471023, China)

  • Junhong Li

    (Luoyang Academy of Agriculture and Forestry Science, Luoyang 471023, China)

  • Junjie Lv

    (Luoyang Academy of Agriculture and Forestry Science, Luoyang 471023, China)

  • Yuanxin Shen

    (College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
    National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Yingxin Xie

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Geng Ma

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Gezi Li

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

  • Yanan Zhao

    (College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China)

  • Chenyang Wang

    (National Engineering Research Center for Wheat, Zhengzhou 450002, China
    State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China)

Abstract

Conservation tillage is believed to promote soil aggregate stability, carbon (C) and nitrogen (N) sequestration, but the underlying mechanisms remain unclear. In this study, soil samples from an 18-year experiment including conventional tillage with straw removal (CT), deep scarification with straw mulching (DS), and no-tillage with straw mulching (NT) were used to obtain different fractions based on a comprehensive wet-sieving method of aggregate and particle size. The results showed that NT and DS increased soil organic carbon (SOC) and N by 9.3–16.4% and 10.8–25.8%, respectively, in addition to increasing the weight proportion of macroaggregates and the contribution of macroaggregate-associated C and N to total SOC and N. The C change in the total POM accounted for 77.4% and 79.9% of the total SOC increase by NT and DS, while the MAOM only accounted for 29.2% and 25.2%, respectively. Meanwhile, microaggregates-within-macroaggregates accounted for 96.9% and 90.5% of the SOC increase by NT and DS, respectively. The total SOC and N were positively correlated with the C and N of the macroaggregates and subfractions. In conclusion, the formation of macroaggregates drives soil C and N sequestration under conservation tillage, and POM and mM were important functional pools in this process.

Suggested Citation

  • Zhijie Ren & Xiaojie Han & Zhidong Han & Wenzhong Tian & Junhong Li & Junjie Lv & Yuanxin Shen & Yingxin Xie & Geng Ma & Gezi Li & Yanan Zhao & Chenyang Wang, 2024. "Long-Term Minimum Tillage and Straw Retention Promote Macroaggregate Formation, Carbon and Nitrogen Sequestration under Wheat-Maize Rotation in Northern China," Agriculture, MDPI, vol. 14(9), pages 1-16, September.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:9:p:1659-:d:1483190
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    References listed on IDEAS

    as
    1. Shuwei Zhu & Tianping Gao & Zhen Liu & Tangyuan Ning, 2022. "Rotary and subsoiling tillage rotations influence soil carbon and nitrogen sequestration and crop yield," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 68(2), pages 89-97.
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