Preprints
https://doi.org/10.5194/egusphere-2022-1084
https://doi.org/10.5194/egusphere-2022-1084
04 Nov 2022
 | 04 Nov 2022

Biochar promotes soil aggregate stability and associated organic carbon sequestration, and regulates microbial community structures in Mollisols from Northeast China

Jing Sun, Xinrui Lu, Guoshuang Chen, Nana Luo, Qilin Zhang, and Xiujun Li

Abstract. Since the 1950s, heavy plowing of Mollisols, combined with a lack of organic matter intake, has resulted in severe soil degradation in Northeast China. The use of biochar in combination with fertilizer is a sustainable method of improving soil quality. In this paper, we conducted field experiments to explore the response of the stability mechanism of the soil aggregates, the dynamic properties of organic carbon, and changes in the microbial community structure to biochar. The biochar input levels were C1, C2, and C3 (9.8, 19.6, and 29.4 Mg·ha-1, respectively), while the nitrogen (N) fertilizer rates were N1/2 (300 kg·ha-1) and N (600 kg·ha-1). The field test showed that the C2N treatment increased the aggregate contents of the > 2 mm and 0.25–2 mm fractions by 56.59 and 23.41 %, respectively. The mean weight diameter increased by 41.53 %, while the geometric mean diameter increased by 21.62 %. The organic carbon content of large aggregates shows a greater increase, with an average of 28.14 %. The phospholipid fatty acids analysis revealed that bacteria (B) were the most prevalent organisms in the soil, followed by fungi (F). The C3N treatment increased the F / B ratio by 36.46 %, whereas the C3 treatment increased the gram-positive (Gm+)/gram-negative (Gm) ratio by 19.67 %. We concluded that the response of Mollisols to biochar is primarily determined by the interplay of aggregates, organic carbon, and microorganisms. Based on the sequestration of SOC and the sustainability and stability of the ecosystem, we selected the optimal ratio for biochar and N fertilizer application and provide a scientific basis for the sustainable utilization of Mollisols resources.

Journal article(s) based on this preprint

25 May 2023
Biochar promotes soil aggregate stability and associated organic carbon sequestration and regulates microbial community structures in Mollisols from northeast China
Jing Sun, Xinrui Lu, Guoshuang Chen, Nana Luo, Qilin Zhang, and Xiujun Li
SOIL, 9, 261–275, https://doi.org/10.5194/soil-9-261-2023,https://doi.org/10.5194/soil-9-261-2023, 2023
Short summary

Jing Sun et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2022-1084', Liang Jin, 09 Dec 2022
    • AC1: 'Reply on CC1', jing Sun, 20 Dec 2022
  • RC1: 'Comment on egusphere-2022-1084', Anonymous Referee #1, 02 Mar 2023
  • RC2: 'Comment on egusphere-2022-1084', Anonymous Referee #2, 22 Mar 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2022-1084', Liang Jin, 09 Dec 2022
    • AC1: 'Reply on CC1', jing Sun, 20 Dec 2022
  • RC1: 'Comment on egusphere-2022-1084', Anonymous Referee #1, 02 Mar 2023
  • RC2: 'Comment on egusphere-2022-1084', Anonymous Referee #2, 22 Mar 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Revision (11 Apr 2023) by Raúl Zornoza
AR by jing Sun on behalf of the Authors (20 Apr 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish subject to minor revisions (review by editor) (20 Apr 2023) by Raúl Zornoza
AR by jing Sun on behalf of the Authors (21 Apr 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (21 Apr 2023) by Raúl Zornoza
ED: Publish as is (24 Apr 2023) by Jeanette Whitaker (Executive editor)
AR by jing Sun on behalf of the Authors (25 Apr 2023)  Manuscript 

Journal article(s) based on this preprint

25 May 2023
Biochar promotes soil aggregate stability and associated organic carbon sequestration and regulates microbial community structures in Mollisols from northeast China
Jing Sun, Xinrui Lu, Guoshuang Chen, Nana Luo, Qilin Zhang, and Xiujun Li
SOIL, 9, 261–275, https://doi.org/10.5194/soil-9-261-2023,https://doi.org/10.5194/soil-9-261-2023, 2023
Short summary

Jing Sun et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
A field experiment was conducted to compare and analyze the effects of combined application of biochar and nitrogen fertilizer on soil aggregate stability mechanism, dynamic characteristics of aggregate organic carbon and microbial community structure in northeast black soil. To provide scientific basis for formulating effective strategies to slow down soil quality degradation and ensure the sustainable development of agroecosystem.