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Effects of straw returning and nitrogen addition on soil quality and physicochemical characteristics of coastal saline soil: A field study of 4 consecutive wheat-maize cycles
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  • Hongjun Yang,
  • Jiangbao Xia,
  • Wenjun Xie,
  • Shoucai Wei,
  • Qian Cui,
  • Pengshuai Shao,
  • Jingkuan Sun,
  • Kaikai Dong,
  • Xingchao Qi
Hongjun Yang
Binzhou University

Corresponding Author:[email protected]

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Jiangbao Xia
Binzhou University
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Wenjun Xie
Binzhou University
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Shoucai Wei
Binzhou University
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Qian Cui
Binzhou University
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Pengshuai Shao
Binzhou University
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Jingkuan Sun
Binzhou University
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Kaikai Dong
Binzhou University
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Xingchao Qi
Binzhou University
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Abstract

The effects of different straw returning and nitrogen addition levels on soil quality are important for proper coastal saline soil remediation. Two maize/wheat straw returning levels (1.0 × 10 4 kg ha -1 (2S) and 5.0 × 10 3 kg ha -1 (S)) and three inorganic nitrogen addition levels (300 kg ha -1 (N2), 150 kg ha -1 (N) and 75 kg ha -1 (N1/2))—were studied, with 150 kg ha -1 inorganic nitrogen and without straw addition treatment as the control (CK), to elucidate the response of soil physical and chemical properties to the two factors. Dry-sieving technique was applied to fractionate the soils into silt-plus-clay particles (< 0.053 mm, CS), microaggregates (0.053–0.25 mm, MI), small macroaggregates (0.25–2.0 mm, SM), and large macroaggregates (> 2 mm, LM). After four consecutive wheat-maize cycles, different straw and N fertilizer treatments obviously decreased the salinity contents, increased the total nutrient contents, and optimized the soil structure of the saline soil. The saline soil reclamation effects showed significant distinctions among the different straw and N fertilizer treatments. The 2SN2 treatment displayed the greatest effects in regard to decreasing salinity, increasing the total soil nutrient contents and optimizing the soil structure, which resulted in the best remediation effect. Straw returning play a major role in decreasing soil salinity and enhancing saline soil aggregate formation. N fertilizer addition supplies rich nutrients for straw decomposition, and promotes soil microbial growth and reproduction, which brought about C sequestration in coastal saline soil. During the coastal saline soil remediation process in the Yellow River Delta, it is suggested to prioritize straw returning and moderate N fertilizer addition, and live together with moderate P fertilizer application.
06 Jul 2022Submitted to Land Degradation & Development
06 Jul 2022Submission Checks Completed
06 Jul 2022Assigned to Editor
09 Jul 2022Reviewer(s) Assigned
20 Aug 2022Review(s) Completed, Editorial Evaluation Pending
26 Aug 2022Editorial Decision: Revise Major
21 Sep 20221st Revision Received
21 Sep 2022Submission Checks Completed
21 Sep 2022Assigned to Editor
22 Oct 2022Review(s) Completed, Editorial Evaluation Pending
22 Oct 2022Editorial Decision: Revise Minor
28 Oct 20222nd Revision Received
30 Oct 2022Submission Checks Completed
30 Oct 2022Assigned to Editor
30 Oct 2022Review(s) Completed, Editorial Evaluation Pending
30 Oct 2022Editorial Decision: Revise Minor
02 Nov 20223rd Revision Received
03 Nov 2022Submission Checks Completed
03 Nov 2022Assigned to Editor
03 Nov 2022Review(s) Completed, Editorial Evaluation Pending
14 Nov 2022Editorial Decision: Revise Minor
24 Nov 20224th Revision Received
25 Nov 2022Submission Checks Completed
25 Nov 2022Assigned to Editor
25 Nov 2022Review(s) Completed, Editorial Evaluation Pending
28 Nov 2022Editorial Decision: Revise Minor
30 Nov 20225th Revision Received
30 Nov 2022Submission Checks Completed
30 Nov 2022Assigned to Editor
30 Nov 2022Review(s) Completed, Editorial Evaluation Pending
08 Dec 2022Editorial Decision: Revise Minor
13 Dec 20226th Revision Received
13 Dec 2022Review(s) Completed, Editorial Evaluation Pending
13 Dec 2022Submission Checks Completed
13 Dec 2022Assigned to Editor
17 Dec 2022Editorial Decision: Accept