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Effects of Agricultural Reclamation on Soil Physicochemical Properties in the Mid-Eastern Coastal Area of China

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  • Yan Xu

    (School of Geography Science and Geomatics Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
    The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210024, China)

  • Lijie Pu

    (The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210024, China
    School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China)

  • Runsen Zhang

    (Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima 7398529, Japan)

  • Ming Zhu

    (The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210024, China
    School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China)

  • Meng Zhang

    (Jiangsu Land Surveying and Planning Institute, Nanjing 210024, China)

  • Xinguo Bu

    (The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210024, China
    Jiangsu Land Surveying and Planning Institute, Nanjing 210024, China)

  • Xuefeng Xie

    (College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China)

  • Yuan Wang

    (School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China)

Abstract

Agricultural reclamation in coastal zones is effective for mitigating population pressure on the food supply. Soil properties are important factors influencing crop production in reclaimed coastal lands. This study aims to investigate the impacts of time and land use trajectories on soil physicochemical properties after reclamation. We sampled soils in areas that were reclaimed in 1999, 1998, 1991, 1989, 1986, 1981, and 1979 and determined some soil physicochemical properties such as electrical conductivity with a 1:5 soil:water ratio (EC1:5), exchange sodium percentage (ESP), sodium adsorption ratio (SAR), pH, organic matter (OM), total nitrogen (TN), alkaline hydrolyzable nitrogen (AN), cation exchange capacity (CEC), total phosphorus (TP), available phosphorus (TP) and soil particle size ratio. We analyzed their correlation with land use and the time since reclamation using one-way analysis of variance (ANOVA) and principal component analysis (PCA). The results showed that soil physicochemical properties changed significantly after agricultural reclamation. Soil EC1:5, ESP, and SAR declined rapidly, and OM, TN, and AN increased rapidly during the 29 years after reclamation. The soil particle size ratio was not significantly correlated with reclamation time. The land-use trajectories identified after reclamation had obvious effects on soil physicochemical properties. Aquaculture ponds were superior to cultivated land in terms of decreasing soil salinity but were inferior in terms of soil nutrient accumulation. In the future, more attention should be given to the environmental effects of agricultural reclaimed soils.

Suggested Citation

  • Yan Xu & Lijie Pu & Runsen Zhang & Ming Zhu & Meng Zhang & Xinguo Bu & Xuefeng Xie & Yuan Wang, 2021. "Effects of Agricultural Reclamation on Soil Physicochemical Properties in the Mid-Eastern Coastal Area of China," Land, MDPI, vol. 10(2), pages 1-11, February.
    • Handle: RePEc:gam:jlands:v:10:y:2021:i:2:p:142-:d:491398
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    References listed on IDEAS

    as
    1. Caiyao Xu & Lijie Pu & Ming Zhu & Jianguo Li & Xinjian Chen & Xiaohan Wang & Xuefeng Xie, 2016. "Ecological Security and Ecosystem Services in Response to Land Use Change in the Coastal Area of Jiangsu, China," Sustainability, MDPI, vol. 8(8), pages 1-24, August.
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    Cited by:

    1. Xuefeng Xie & Qi Xiang & Tao Wu & Ming Zhu & Fei Xu & Yan Xu & Lijie Pu, 2021. "Impacts of Agricultural Land Reclamation on Soil Nutrient Contents, Pools, Stoichiometry, and Their Relationship to Oat Growth on the East China Coast," Land, MDPI, vol. 10(4), pages 1-14, April.
    2. Xuqing Li & Yao Su & Temoor Ahmed & Haiying Ren & Muhammad Rizwan Javed & Yanlai Yao & Qianli An & Jianli Yan & Bin Li, 2021. "Effects of Different Organic Fertilizers on Improving Soil from Newly Reclaimed Land to Crop Soil," Agriculture, MDPI, vol. 11(6), pages 1-15, June.
    3. Fei Xu & Yaping Shao & Baogen Xu & Huan Li & Xuefeng Xie & Yan Xu & Lijie Pu, 2023. "Evaluation and Zoning of Cultivated Land Quality Based on a Space–Function–Environment," Land, MDPI, vol. 12(1), pages 1-20, January.

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