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Nitrogen interception and fate in vegetated ditches using the isotope tracer method: A simulation study in northern China

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  • Li, Xiaona
  • Zhang, Weiwei
  • Zhao, Chunqiao
  • Li, Hongjie
  • Shi, Ruishuang

Abstract

During periods of heavy precipitation, farmland drainage ditches are the main routes for farmland nitrogen flowing into surface waters in northern China. Vegetated ditches can be engineered to mitigate N loss from agricultural runoff. We used a simulation study to evaluate the interception of nitrogen in a ditch without vegetation and three vegetated ditches. The 15N stable isotope tracer method was used to analyze the fate of ditch intercepting farmland runoff nitrogen. The three vegetated ditches were planted with Lolium perenne L., Bromus inermis Leyss. and Elytrigia repens (L.) Nevski. The results showed that the interception rates of nitrogen in the three vegetated ditches were higher than in the ditch without vegetation. The L. perenne ditch had the lowest interception rates of nitrogen among the three vegetated ditches. The interception of nitrogen by the three vegetated ditches was primarily achieved by the capture of nitrogen runoff in the soil ditch bed, which allowed water infiltration. Nitrogen retained in the ditch bed soil of the ditch without vegetation was enriched in the 0–10 cm soil layer from surface mainly. However, in the three vegetated ditches, it was transported to the 50 cm soil layer. All of the nitrogen retained in the vegetated ditches was absorbed by the L. Perenne and E. repens, and the interception of nitrogen was affected by plant species and growth stage in the vegetated ditch.

Suggested Citation

  • Li, Xiaona & Zhang, Weiwei & Zhao, Chunqiao & Li, Hongjie & Shi, Ruishuang, 2020. "Nitrogen interception and fate in vegetated ditches using the isotope tracer method: A simulation study in northern China," Agricultural Water Management, Elsevier, vol. 228(C).
    • Handle: RePEc:eee:agiwat:v:228:y:2020:i:c:s0378377419310431
    DOI: 10.1016/j.agwat.2019.105893
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    References listed on IDEAS

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    1. Daly, K. & Tuohy, P. & Peyton, D. & Wall, D.P. & Fenton, O., 2017. "Field soil and ditch sediment phosphorus dynamics from two artificially drained fields on poorly drained soils," Agricultural Water Management, Elsevier, vol. 192(C), pages 115-125.
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    Cited by:

    1. Tianheng Jiang & Maomao Wang & Wei Zhang & Cheng Zhu & Feijuan Wang, 2024. "A Comprehensive Analysis of Agricultural Non-Point Source Pollution in China: Current Status, Risk Assessment and Management Strategies," Sustainability, MDPI, vol. 16(6), pages 1-19, March.
    2. Lujian Shi & Songmin Li, 2024. "Simulation Study on Water Quality of Paddy Field Ditches Considering the Effects of Rainfall and Sediment Release," Sustainability, MDPI, vol. 16(3), pages 1-20, January.
    3. Jessica A. Rubin & Josef H. Görres, 2020. "Potential for Mycorrhizae-Assisted Phytoremediation of Phosphorus for Improved Water Quality," IJERPH, MDPI, vol. 18(1), pages 1-23, December.

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