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Effects of planting quinoa on soil properties and microbial community in saline soil
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  • Huiying Hui,
  • Tianyun Shao,
  • Xiumei Gao,
  • Xiaohua Long,
  • Zed Rengel
Huiying Hui
Nanjing Agricultural University

Corresponding Author:[email protected]

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Tianyun Shao
Nanjing Agricultural University
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Xiumei Gao
Nanjing Agricultural University
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Xiaohua Long
Nanjing Agricultural University
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Zed Rengel
The University of Western Australia
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Abstract

Quinoa (Chenopodium quinoa), a herbaceous annual, has been widely cultivated in recent years because of its high nutritional value and strong tolerance to abiotic stresses. The study was conducted at two planting densities (LD, 10 plants/m2; HD, 65 plants/m2) on ameliorated coastal mudflats in Jiangsu Province, China (118° 46′ E, 32° 03′ N). The results showed soil salinity and organic matter were higher in the HD than LD treatment, and salinity of the rhizosphere soil was higher than that of the non-rhizosphere soil. Quinoa grown in HD was taller, with thicker stalks and lower yields per plant, but higher yield per unit area. Amplicon sequencing showed that Proteobacteria, Bacteroidota and Acidobacteria were the dominant bacterial phyla. Regarding the rhizosphere soil, the Shannon index was higher in the HD than LD, and Proteobacteria and Bacteroidota were more abundant in the HD treatment. Fifty-one differential metabolites were identified by metabolomic assays, belonging to 14 annotated metabolic pathways. S-adenosylmethionine was the most abundant and up-regulated metabolite (fold change >1.67), and was more abundant in the roots from the LD than HD treatment. Docosahexaenoic acid was more abundant in the HD than LD treatment, and was down-regulated metabolite. In conclusion, planting density was an important factor affecting quinoa yield; compared with unplanted soil, planting quinoa at low density increased the content of the important metabolite S-adenosylmethionine in the root system of quinoa, and high density cultivation of quinoa increased soil salinity and microbial abundance and diversity.
28 Feb 2022Submitted to Land Degradation & Development
01 Mar 2022Submission Checks Completed
01 Mar 2022Assigned to Editor
05 Mar 2022Review(s) Completed, Editorial Evaluation Pending
10 Mar 20221st Revision Received
11 Mar 2022Submission Checks Completed
11 Mar 2022Assigned to Editor
12 Mar 2022Review(s) Completed, Editorial Evaluation Pending
13 Mar 2022Editorial Decision: Revise Minor
14 Mar 20222nd Revision Received
22 Mar 2022Submission Checks Completed
22 Mar 2022Assigned to Editor
25 Mar 2022Review(s) Completed, Editorial Evaluation Pending
27 Mar 2022Editorial Decision: Revise Minor
29 Mar 20223rd Revision Received
30 Mar 2022Submission Checks Completed
30 Mar 2022Assigned to Editor
02 Apr 2022Review(s) Completed, Editorial Evaluation Pending
02 Apr 2022Editorial Decision: Revise Minor
03 Apr 20224th Revision Received
04 Apr 2022Submission Checks Completed
04 Apr 2022Assigned to Editor
10 Apr 2022Review(s) Completed, Editorial Evaluation Pending
10 Apr 2022Editorial Decision: Accept