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Biochar Blended with Nitrogen Fertilizer Promotes Maize Yield by Altering Soil Enzyme Activities and Organic Carbon Content in Black Soil

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  • Jing Sun

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xinrui Lu

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

  • Shuang Wang

    (Affairs Service Centers of Natural Resources in Tieling Country, Northeast China, Tieling 112608, China)

  • Chunjie Tian

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

  • Guoshuang Chen

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

  • Nana Luo

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China)

  • Qilin Zhang

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Xiujun Li

    (Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract

Biochar and nitrogen fertilizers are known to increase soil carbon storage and reduce soil nitrogen loss as amendments, suggesting a promising strategy for highly effectively increasing soil productivity. However, few studies have explored the mechanisms of their effects on crop yield in terms of active carbon fraction and enzyme activity, which ultimately limits the potential for the application of biochar in combination with nitrogen fertilizers. To evaluate the effect of biochar and nitrogen fertilizer on the improvement of black soils in northeast China, a field experiment was conducted in the black soil to compare and analyze the application methods on total organic carbon (TOC), total nitrogen (TN), enzyme activities, and maize yields. Biochar rates: CK, C1, C2, and C3 (0, 9.8, 19.6, and 29.4 Mg·ha −1 ); N fertilizer rates: N1/2 and N (30 and 60 kg·ha −1 ). Results indicated that biochar and N fertilizer amendments significantly ameliorated soil fertility, such as TOC and TN, compared to the unamended soil. The TOC levels in the C3 treatment increased by 35.18% and the TN levels by 23.95%. The improvement in TN is more significant when biochar is blended with N fertilizer. Biochar blended with N fertilizer increased maize cellulase, urease, and invertase activities by an average of 53.12%, 58.13%, and 16.54%, respectively. Redundancy analysis showed that TOC, TN, and MBN contributed 42%, 16.2%, and 22.2%, respectively, to the maize yield indicator. Principal component analysis showed that reduced N fertilizer was more effective in improving yields, with a maximum yield increase of 50.74%. Biochar blended with N fertilizer is an effective strategy to improve the fertility and productivity of black soils in northeast China, while nitrogen fertilizer reduction is feasible and necessary for maintaining grain yield.

Suggested Citation

  • Jing Sun & Xinrui Lu & Shuang Wang & Chunjie Tian & Guoshuang Chen & Nana Luo & Qilin Zhang & Xiujun Li, 2023. "Biochar Blended with Nitrogen Fertilizer Promotes Maize Yield by Altering Soil Enzyme Activities and Organic Carbon Content in Black Soil," IJERPH, MDPI, vol. 20(6), pages 1-14, March.
  • Handle: RePEc:gam:jijerp:v:20:y:2023:i:6:p:4939-:d:1094204
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    References listed on IDEAS

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    1. Lening Hu & Shuangli Li & Ke Li & Haiyan Huang & Wenxin Wan & Qiuhua Huang & Qiuyan Li & Yafen Li & Hua Deng & Tieguang He, 2020. "Effects of Two Types of Straw Biochar on the Mineralization of Soil Organic Carbon in Farmland," Sustainability, MDPI, vol. 12(24), pages 1-18, December.
    2. Humera Aziz & Xiukang Wang & Ghulam Murtaza & Ambreen Ashar & Sarfraz Hussain & Muhammad Abid & Behzad Murtaza & Muhammad Hamzah Saleem & Sajid Fiaz & Shafaqat Ali, 2021. "Evaluation of Compost and Biochar to Mitigate Chlorpyrifos Pollution in Soil and Their Effect on Soil Enzyme Dynamics," Sustainability, MDPI, vol. 13(17), pages 1-15, August.
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    Cited by:

    1. Samir A. Haddad & Hossam Abdelmageed & Abdelaziz Saleh & Samia Ahmed & Mohieyeddin M. Abd El-Azeim & Joanna Lemanowicz & Gaber E. Eldesoky & Omar Saad, 2023. "Response of Cellulose Decomposition and Nodulation in Soils Amended with Biochar for Peri-Urban Agriculture," Sustainability, MDPI, vol. 15(13), pages 1-18, June.

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