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Effects of Two Types of Straw Biochar on the Mineralization of Soil Organic Carbon in Farmland

Author

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  • Lening Hu

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China
    Key Laboratory of Karst Dynamics, MNR & Guangxi, Institute of Karst Geology, CAGS, Guilin 541004, China)

  • Shuangli Li

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Ke Li

    (College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China)

  • Haiyan Huang

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Wenxin Wan

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Qiuhua Huang

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Qiuyan Li

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Yafen Li

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Hua Deng

    (Key Laboratory of Ecology and Environmental Protection of Rare and Endangered Animals and Plants, Ministry of Education, Guangxi Normal University & College of Environment and Resources, Guangxi Normal University, Guilin 541004, China)

  • Tieguang He

    (Agricultural Resources and Environment Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China)

Abstract

To investigate the effects of biochar on soil carbon composition and transformation, the effects of 1%, 2%, and 5% mass ratios of banana and cassava straw biochar on carbon dioxide release, total organic carbon (TOC), soluble organic carbon (SOC), and enzyme activity in soil were studied in incubation experiments at a constant temperature in the laboratory. The results showed that the cumulative CO 2 emissions from cassava straw were 15.82 (1% addition ratio) and 28.14 μg·kg −1 (2%), which were lower than those from banana straw, i.e., 46.77 (1%) and 59.26 μg·kg −1 (2%). After culture, the total organic carbon contents of cassava straw were 8.55 (5%), 5.27 (2%), and 3.98 μg·kg −1 (1%), which were higher than those of banana straw, i.e., 6.31 (5%), 4.23 (2%), and 3.16 μg·kg −1 (1%). The organic carbon mineralization rate in each treatment showed a trend of increasing first, then decreasing, and finally stabilizing. There was a very significant positive correlation between catalase and urease activity in soil with cassava straw biochar and between catalase activity and SOC mineralization with banana straw biochar. It plays an important role in the transformation and decomposition of organic carbon. These results show that the application of biomass carbon can significantly improve the organic carbon content and enzyme activity of farmland soil, increase the cumulative mineralization amount and mineralization rate of SOC, and thus increase the carbon sequestration capacity of soil.

Suggested Citation

  • 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.
  • Handle: RePEc:gam:jsusta:v:12:y:2020:i:24:p:10586-:d:464139
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    References listed on IDEAS

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    1. Liu, Beibei & Wu, Qiaoran & Wang, Feng & Zhang, Bing, 2019. "Is straw return-to-field always beneficial? Evidence from an integrated cost-benefit analysis," Energy, Elsevier, vol. 171(C), pages 393-402.
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    3. Dominic Woolf & James E. Amonette & F. Alayne Street-Perrott & Johannes Lehmann & Stephen Joseph, 2010. "Sustainable biochar to mitigate global climate change," Nature Communications, Nature, vol. 1(1), pages 1-9, December.
    4. Rubab Sarfraz & Siwei Li & Wenhao Yang & Biqing Zhou & Shihe Xing, 2019. "Assessment of Physicochemical and Nutritional Characteristics of Waste Mushroom Substrate Biochar under Various Pyrolysis Temperatures and Times," Sustainability, MDPI, vol. 11(1), pages 1-14, January.
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    2. Sokkeang Be & Soydoa Vinitnantharat & Anawat Pinisakul, 2021. "Effect of Mangrove Biochar Residue Amended Shrimp Pond Sediment on Nitrogen Adsorption and Leaching," Sustainability, MDPI, vol. 13(13), pages 1-19, June.

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