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Application Effect of Straw Returning and Biochar in the Improvement of Saline-Alkali Land in Northeast China

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Abstract

With the gradual change of climate, the organic matter and nutrients in the soil are constantly losing. It induces the creation of saltwater alkali land and quickens soil degradation, both of which further lower productivity. It will eventually lead to a serious food catastrophe. As as a consequence, the research conducted an experimental analysis on the effects of straw returning and biological carbon on saline alkali land development in northeast Jiangsu University, with the goal of addressing the issue of weak soil internal structure in some places of northeast China. The experiment analyzed the growth and photosynthesis dynamics, material accumulation and transformation, root activity, soil physical and chemical properties, and the spike characteristics of Kenjiandao 5, respectively. The experimental results showed that biochar and straw returning could effectively improve rice’s growth rate and effective tillering. Among the biochar returning treatments, 4 treatments had the highest traumatic discharge, with an increased rate of 3.13–37.65%, and 6 treatments had the highest traumatic discharge, 29.96% higher than CK. At the same time, biochar and straw returning to the soil can effectively improve the organic matter in the soil and reduce its pH value. Compared with CK, the highest increase is 27.80%. In general, the use of biological carbon and straw return can effectively optimize the soil structure, increase the yield, reduce the waste of straw resources, and have a strong practical effect on the actual saline alkali land improvement in Northeast China.

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Funding

The research is supported by: Science and technology research project of Jilin Provincial Department of Education: research and development of rice straw interlayer salt blocking machine in saline alkali land Contract (no. JJKH20210339KJ).

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Authors and Affiliations

  1. College of Engineering and Technology, Jilin Agricultural University, 130118, Changchun, China

    Jingli Wang, Haiyang Jing, Tianyue Xu, Chunrong Li & Weizhi Feng

  2. Research Institute of Straw Returning Application Technology, Jilin Academy of Agricultural Machinery, 130022, Changchun, China

    Chunkai Zhao

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  1. Jingli Wang
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  3. Tianyue Xu
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  4. Chunrong Li
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Correspondence to Weizhi Feng.

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The authors declare that they have no conflicts of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.

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Jingli Wang, Jing, H., Xu, T. et al. Application Effect of Straw Returning and Biochar in the Improvement of Saline-Alkali Land in Northeast China. Biol Bull Russ Acad Sci 50, 825–836 (2023). https://doi.org/10.1134/S1062359022603226

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