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Organic substitution accumulates more nitrogen in soil while maintaining unchanged nitrogen use efficiency in rice-fava bean rotation system
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  • Panlei Wang,
  • Bin Wang,
  • Anqiang Chen,
  • Xi Sun,
  • Caiyan Du,
  • Hongye Zhu,
  • Yanhua Pan,
  • Li Tang
Panlei Wang
Yunnan Agricultural University

Corresponding Author:[email protected]

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Bin Wang
Chinese Academy of Agricultural Sciences Institute of Environment and Sustainable Development in Agriculture
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Anqiang Chen
Yunnan Academy of Agricultural Sciences
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Xi Sun
Yunnan Academy of Agricultural Sciences
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Caiyan Du
Yunnan Academy of Agricultural Sciences
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Hongye Zhu
Yunnan Academy of Agricultural Sciences
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Yanhua Pan
Yunnan Academy of Agricultural Sciences
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Li Tang
Yunnan Agricultural University
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Abstract

Organic substitution management (OSM) is critical for soil conservation and nitrogen efficiency. However, assessment of soil N pool and system NUE under paddy-upland rotation systems after OSM introduction is still lacking, especially given the system’s alternating wetting-drying soil environment and double cropping. Here, the response of soil nitrogen and crop nitrogen use efficiency to OSM was evaluated in 2018, 2019 and 2020, basing on a long-term rice-fava bean rotation experiment started in 2015. Soil nitrogen, soil enzymes and microbial functions were also used to identify the key factors influencing nitrogen use in response to OSM. The results showed that in comparison to chemical fertilization, OSM increased the soil total nitrogen in both cropping seasons, with increases of 13.1% for the rice season and 16.3% for the fava bean season, respectively. However, nitrogen use efficiency (NUE) showed season-specific responses to OSM. OSM decreased NUE by 18.2% in the rice season but decreased by 8.0% in the fava bean season. Based on the SEM analysis results, we suggest that the opposite response of NRE and NUE to OSM across the studied seasons was mainly attributed to the difference in crop nitrogen requirements and soil hydrological conditions. In conclusion, in paddy-upland rotation areas where have increasing demand for food and chemical fertilizers are currently abused, the use of OSM has potential to curb regional soil degradation due to its high capacity of improving soil quality while ensuring no yield reduction.
15 May 2022Submitted to Land Degradation & Development
16 May 2022Submission Checks Completed
16 May 2022Assigned to Editor
06 Jun 2022Reviewer(s) Assigned
29 Jun 2022Review(s) Completed, Editorial Evaluation Pending
05 Jul 2022Editorial Decision: Revise Major
14 Aug 20221st Revision Received
14 Aug 2022Submission Checks Completed
14 Aug 2022Assigned to Editor
08 Sep 2022Review(s) Completed, Editorial Evaluation Pending
07 Feb 20232nd Revision Received
07 Feb 2023Review(s) Completed, Editorial Evaluation Pending
07 Feb 2023Submission Checks Completed
07 Feb 2023Assigned to Editor
18 Feb 2023Reviewer(s) Assigned
05 Mar 2023Editorial Decision: Revise Minor
08 Apr 20233rd Revision Received
08 Apr 2023Submission Checks Completed
08 Apr 2023Assigned to Editor
08 Apr 2023Review(s) Completed, Editorial Evaluation Pending
14 May 2023Editorial Decision: Revise Minor
17 May 20234th Revision Received
17 May 2023Assigned to Editor
17 May 2023Submission Checks Completed
17 May 2023Review(s) Completed, Editorial Evaluation Pending
03 Jun 2023Editorial Decision: Revise Minor
06 Jun 20235th Revision Received
06 Jun 2023Review(s) Completed, Editorial Evaluation Pending
06 Jun 2023Submission Checks Completed
06 Jun 2023Assigned to Editor
23 Jul 2023Editorial Decision: Accept