Short-Term Effects of Reclamation of Aquaculture Ponds to Paddy Fields on Soil Chemical Properties and Bacterial Communities in Eastern China Coastal Zone

Anyong Hu, Min Lv, Shumiao Jiang, Lingyi Xu, Shiyang Guo, Na Zhao, Manman Zheng, Bo Liu and Jinbiao Li
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Anyong Hu: School of Geographic Science, Nantong University, Nantong 226019, China
Min Lv: School of Geographic Science, Nantong University, Nantong 226019, China
Shumiao Jiang: School of Geographic Science, Nantong University, Nantong 226019, China
Lingyi Xu: School of Geographic Science, Nantong University, Nantong 226019, China
Shiyang Guo: School of Geographic Science, Nantong University, Nantong 226019, China
Na Zhao: Jiangsu Yanjiang Institute of Agricultural Sciences, Nantong 226541, China
Manman Zheng: College of Life Sciences and Agronomy, Zhoukou Normal University, Zhoukou 466001, China
Bo Liu: School of Geographic Science, Nantong University, Nantong 226019, China
Jinbiao Li: School of Geographic Science, Nantong University, Nantong 226019, China

Sustainability, 2022, vol. 14, issue 3, 1-13

Abstract: Large areas of tidal flats were previously developed into aquaculture ponds and were recently encouraged to be converted into paddy fields to fulfill food and economic needs in China. However, the influences of short-term rice cultivation at the reclaimed aquaculture ponds on soil chemical properties and bacterial communities are poorly understood. To address this issue, we collected mineral soil samples at 0–20 and 20–40 cm depths from non-cultivated soils and paddy fields after being reclaimed from aquaculture ponds in Nantong, China, and identified soil bacterial communities using high-throughput sequencing. The results suggested that rice cultivation significantly increased the accumulation of total soil carbon (TC) and dissolved organic carbon (WSOC). The pH, ammonium (NH 4 + ), nitrate (NO 3 − ) and available phosphorus (AP) varied with the reclamation duration but did not show a unanimous tendency. Proteobacteria , Acidobacteria , Bacteroidetes , Chloroflexi and Planctomycetes dominated the bacterial community in both non-cultivated and cultivated soils after reclamation regardless of cultivation ages and soil depth. The variations in the diversity and composition of the soil microbial community were mainly associated with electrical conductivity (EC), WSOC, TC, NH 4 + and NO 3 − in non-cultivated and cultivated lands. Here, we found that short-term rice cultivation at the reclaimed aquaculture ponds strongly influenced soil bacterial communities and chemical properties, especially in the 0–20 cm depth, in the coastal regions.

Keywords: tidal flats; aquaculture ponds; reclamation; rice cultivation; soil chemical properties; bacterial community (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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