Quantifying Urban Bioswale Nitrogen Cycling in the Soil, Gas, and Plant Phases
| Autor: | Duncan N. L. Menge, Jessica M. K. Hoch, Brian J. Mailloux, Patricia J. Culligan, Ranran Hu, Matthew I. Palmer, Nandan H. Shetty, Wade R. McGillis, Krista L. McGuire |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:Hydraulic engineering
0208 environmental biotechnology Geography Planning and Development Stormwater chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry chemistry.chemical_compound lcsh:Water supply for domestic and industrial purposes Nitrate lcsh:TC1-978 nitrogen cycle mineralization plant uptake Bioswale Nitrogen cycle 0105 earth and related environmental sciences Water Science and Technology lcsh:TD201-500 nitrous oxide Nitrogen nitrification 020801 environmental engineering chemistry Environmental chemistry Soil water Environmental science Nitrification Surface runoff bioswale |
| Zdroj: | Water Volume 10 Issue 11 Water, Vol 10, Iss 11, p 1627 (2018) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w10111627 |
| Popis: | Bioswales are a common feature of urban green infrastructure plans for stormwater management. Despite this fact, the nitrogen (N) cycle in bioswales remains poorly quantified, especially during dry weather in the soil, gas, and plant phases. To quantify the nitrogen cycle across seven bioswale sites located in the Bronx, New York City, we measured rates of ammonium and nitrate production in bioswale soils. We also measured soil nitrous oxide gas emissions and plant foliar nitrogen. We found that all mineralized nitrogen underwent nitrification, indicating that the soils were nitrogen-rich, particularly during summer months when nitrogen cycling rates increase, as indicated by higher levels of ammonium in the soil. In comparison to mineralization (0 to 110 g N m&minus 2 y&minus 1), the amounts of nitrogen uptake by the plants (0 to 5 g N m&minus 1) and of nitrogen in gas emissions from the soils (1 to 10 g N m&minus 1) were low, although nitrous oxide gas emissions increased in the summer. The bioswales&rsquo greatest influx of nitrogen was via stormwater (84 to 591 g N m&minus 1). These findings indicate that bioswale plants receive overabundant nitrogen from stormwater runoff. However, soils currently used for bioswales contain organic matter contributing to the urban nitrogen load. Thus, bioswale designs should use less nitrogen rich soils and minimize fertilization for lower nitrogen runoff. |
| Databáze: | OpenAIRE |
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