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Responses of Phragmites australis to Nitrogen Addition along Salinity Gradients in Coastal Saline–Alkali Soil

Author

Listed:
  • Huarui Gong

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    Shandong Dongying Institute of Geographic Sciences, Dongying 257000, China
    Yellow River Delta Modern Agricultural Engineering Laboratory, Chinese Academy of Sciences, Beijing 100101, China
    These authors contributed equally to this work.)

  • Yanyun Han

    (Shandong Dongying Institute of Geographic Sciences, Dongying 257000, China
    College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
    These authors contributed equally to this work.)

  • Jing Li

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Zhen Liu

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    Shandong Dongying Institute of Geographic Sciences, Dongying 257000, China
    Yellow River Delta Modern Agricultural Engineering Laboratory, Chinese Academy of Sciences, Beijing 100101, China)

  • Ruixing Hou

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Yitao Zhang

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Wenjun Dou

    (Yantai Coastal Zone Geological Survey Center, China Geological Survey, Yantai 264011, China)

  • Bing Wang

    (Yantai Coastal Zone Geological Survey Center, China Geological Survey, Yantai 264011, China)

  • Zhu Ouyang

    (Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    Yellow River Delta Modern Agricultural Engineering Laboratory, Chinese Academy of Sciences, Beijing 100101, China)

Abstract

Soil salinization and nitrogen (N) enrichment in saline–alkali soils resulting from human activities cause potential environmental pressure on Phragmites australis . However, the response of P. australis to N addition under different salt conditions remains unknown. This study examined the changes in soil properties and growth indices as well as their relationship to N addition through an in situ field experiment using three soil salinity levels with P. australis in the Yellow River Delta. The study showed that soil salinity levels significantly affected the effects of N addition on soil pH and water contents. N addition increased the soil NO 3 – contents and decreased soil available phosphorus (Avail. P) contents; however, soil salinity levels did not impact the effects of N addition on soil NO 3 − and Avail. P contents. N addition decreased the biomass of P. australis, since the decrease in the competitiveness for N sources changed the vegetation diversity. The results suggest that the biomass, plant height, and leaf soil plant analysis development (SPAD) values of P. australis increased with increasing soil Avail. P contents rather than soil NO 3 – contents. Therefore, we suggest the important role of Avail. P addition in N enrichment conditions in saline–alkali wasteland and estuarine wetland ecosystems.

Suggested Citation

  • Huarui Gong & Yanyun Han & Jing Li & Zhen Liu & Ruixing Hou & Yitao Zhang & Wenjun Dou & Bing Wang & Zhu Ouyang, 2022. "Responses of Phragmites australis to Nitrogen Addition along Salinity Gradients in Coastal Saline–Alkali Soil," Land, MDPI, vol. 11(12), pages 1-12, December.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:12:p:2320-:d:1006739
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    References listed on IDEAS

    as
    1. Xin Zhang & Eric A. Davidson & Denise L. Mauzerall & Timothy D. Searchinger & Patrice Dumas & Ye Shen, 2015. "Managing nitrogen for sustainable development," Nature, Nature, vol. 528(7580), pages 51-59, December.
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