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Effects of Humic Acid Added to Controlled-Release Fertilizer on Summer Maize Yield, Nitrogen Use Efficiency and Greenhouse Gas Emission

Author

Listed:
  • Yanqing Guo

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China
    These authors contributed equally to this work.)

  • Zhentao Ma

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China
    These authors contributed equally to this work.)

  • Baizhao Ren

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China)

  • Bin Zhao

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China)

  • Peng Liu

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China)

  • Jiwang Zhang

    (State Key Laboratory of Crop Biology, Agronomy College of Shandong Agricultural University, Taian 271018, China)

Abstract

Humic acid plays an important role in improving grain yield and reducing N losses. In order to explore the effects of humic acid added to controlled-release fertilizer on summer maize yield, nitrogen use efficiency (NUE) and the characteristics of greenhouse gas (GHG) emissions in maize farmland soil, a two-year field experiment was set up. The treatments consisted of two fertilizers: 3% humic acid added to controlled-release fertilizer (HACRF), controlled-release fertilizer (CRF) and a control (without N fertilizer, N0). The results demonstrate that the yield and NUE of summer maize were significantly increased with the addition of humic acid in N fertilizer. Compared with N0 and CRF, the yield of maize was increased by 99.1% and 5.0%, respectively. Compared with CRF, the contents of soil ammonium–nitrogen (NH 4 + -N) and nitrate–nitrogen (NO 3 − -N) in HACRF were higher during early maize growth stage but lower during the late grain-filling stage. The NUE and soil nitrogen interdependent rate of HACRF were significantly increased by 4.6–5.4% and 7.2–11.6%, respectively, across the years compared with those of CRF. Moreover, the annual cumulative N 2 O emissions in HACRF were decreased by 29.0% compared with the CRF. Thus, the global warming potential and greenhouse emission intensity of HACRF were significantly decreased by 29.1% and 32.59%, respectively, compared with CRF. In conclusion, adding humic acid to controlled-release fertilizer can result in higher yield and nitrogen uptake, improve nitrogen use efficiency and reduce greenhouse gas emissions, which have better yield and environmental effects.

Suggested Citation

  • Yanqing Guo & Zhentao Ma & Baizhao Ren & Bin Zhao & Peng Liu & Jiwang Zhang, 2022. "Effects of Humic Acid Added to Controlled-Release Fertilizer on Summer Maize Yield, Nitrogen Use Efficiency and Greenhouse Gas Emission," Agriculture, MDPI, vol. 12(4), pages 1-13, March.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:4:p:448-:d:777963
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    References listed on IDEAS

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    1. Wang, Chong & Zhao, Jiongchao & Feng, Yupeng & Shang, Mengfei & Bo, Xiaozhi & Gao, Zhenzhen & Chen, Fu & Chu, Qingquan, 2021. "Optimizing tillage method and irrigation schedule for greenhouse gas mitigation, yield improvement, and water conservation in wheat–maize cropping systems," Agricultural Water Management, Elsevier, vol. 248(C).
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    Cited by:

    1. Ahmed Mosa & Mostafa M. Mansour & Enas Soliman & Ayman El-Ghamry & Mohamed El Alfy & Ahmed M. El Kenawy, 2023. "Biochar as a Soil Amendment for Restraining Greenhouse Gases Emission and Improving Soil Carbon Sink: Current Situation and Ways Forward," Sustainability, MDPI, vol. 15(2), pages 1-26, January.
    2. Mirosław Wyszkowski & Natalia Kordala & Marzena S. Brodowska, 2023. "Trace Element Content in Soils with Nitrogen Fertilisation and Humic Acids Addition," Agriculture, MDPI, vol. 13(5), pages 1-13, April.

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