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Impacts of Agricultural Land Reclamation on Soil Nutrient Contents, Pools, Stoichiometry, and Their Relationship to Oat Growth on the East China Coast

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  • Xuefeng Xie

    (College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
    Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210023, China
    These two authors contributed equally to this study as co-first author.)

  • Qi Xiang

    (College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
    These two authors contributed equally to this study as co-first author.)

  • Tao Wu

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

  • Ming Zhu

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

  • Fei Xu

    (Institute of Land and Urban-Rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China)

  • Yan Xu

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Lijie Pu

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

Abstract

Agricultural land reclamation of coastal tidal land (CTL) with organic amendments may modulate the soil properties, and therefore promote crop growth. However, the linkages between soil nutrient contents, pools, stoichiometry, and crop growth under the supplement of organic amendments in CTL is limited. In this study, six treatments including the control (CK), organic manure (OM), polyacrylamide plus organic manure (PAM + OM), straw mulching plus organic manure (SM + OM), buried straw plus organic manure (BS + OM), and bio-organic manure plus organic manure (BM + OM) were conducted to explore these linkages in newly reclaimed CTL in Jiangsu Province, eastern China. The results showed that the application of different soil reclamation treatments increased soil nutrient contents, pools, and modulated their stoichiometric ratio, which thus promoted the growth of oat. Soil under all reclamation treatments increased the contents of surface soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP), and the BM + OM treatment had the highest increase, which increased by 11.7–182.4%, 24.3–85.7%, 3.2–29.4%, respectively. The highest soil C pools were observed in the oat heading stage (36.67–41.34 Mg C ha −1 ), whereas the soil N and P pools were more stable during the oat growth period. Similarly, the highest surface soil C/N and C/P were observed in the oat heading stage (11.23–14.67 and 8.97–14.21), whereas the N/P in surface soil increased compared with the CK treatment during the oat growth period, with the exception of the filling stage. Land reclamation treatments significantly promoted oat growth by changing soil C, N, and P contents, pools, and stoichiometry, among which soil SOC, TN, TP, C/P, and N/P are more closely related to oat growth ( p < 0.05).

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jlands:v:10:y:2021:i:4:p:355-:d:527820
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    References listed on IDEAS

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    1. 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.
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    Cited by:

    1. Heying Li & Jiayao Wang & Jianchen Zhang & Fen Qin & Jiyuan Hu & Zheng Zhou, 2021. "Analysis of Characteristics and Driving Factors of Wetland Landscape Pattern Change in Henan Province from 1980 to 2015," Land, MDPI, vol. 10(6), pages 1-15, May.
    2. Gopal Lal Meena & Bira Kishore Sethy & Hem Raj Meena & Shakir Ali & Ashok Kumar & Rajive Kumar Singh & Raghuvir Singh Meena & Ram Bhawan Meena & Gulshan Kumar Sharma & Bansi Lal Mina & Kuldeep Kumar, 2023. "Quantification of Impact of Land Use Systems on Runoff and Soil Loss from Ravine Ecosystem of Western India," Agriculture, MDPI, vol. 13(4), pages 1-21, March.
    3. Jingnan Li & Haiyang Zhang & Li Zheng, 2023. "Influence of Organic Amendments Based on Garden Waste for Microbial Community Growth in Coastal Saline Soil," Sustainability, MDPI, vol. 15(6), pages 1-16, March.

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