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Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (10): 3191-3198.doi: 10.13287/j.1001-9332.201810.001

• Research paper • Previous Articles     Next Articles

Responses of greenhouse gas emission to simulated nitrogen deposition in Calamagrostis angustifolia wetlands of Sanjiang Plain, China

ZHANG Rong-tao1,2, SUI Xin3, XU Nan2, ZHONG Hai-xiu2, FU Xiao-yu1,2, NI Hong-wei2*   

  1. 1College of Geographical Science, Harbin Normal University, Harbin 150025, China;
    2Institute of Nature and Ecology, Heilongjiang Academy of Sciences, Harbin 150040, China;
    3College of Life Sciences, Heilongjiang University, Harbin 150080, China
  • Received:2018-01-07 Online:2018-10-20 Published:2018-10-20
  • Supported by:
    The work was supported by the National Natural Science Foundation of China (31470019, 31670489), the National Key Research and Development Project (2016YFC0500405-02) and the Basic Application Technology Project of Heilongjiang Province (ZNJZ2017ZR01)

Abstract: A long-term simulated nitrogen deposition experiment was carried out in Ecological Locating Research Station of the Institute of Nature and Ecology of Heilongjiang Academy of Sciences, with three different treatments including low nitrogen treatment (40 kg N·hm-2·a-1), high nitrogen treatment (80 kg N·hm-2·a-1) and the control (0 kg N·hm-2·a-1). The greenhouse gas emission fluxes were measured using a static box-gas chromatography method, with environmental factors being simultaneously investigated to understand the responses of greenhouse gas emission to the nitrogen deposition in the Calamagrostis angustifolia wetland. The results showed that low and high nitrogen treatments significantly increased the greenhouse gas emission fluxes. The CO2 emission flux increased by 47.5% and 47.9%, the CH4 emission fluxes increased by 76.8% and 110.1%, and the N2O emission fluxes increased by 42.4% and 10.6% in low nitrogen treatment and high nitrogen treatment, respectively. Low nitrogen input changed the seasonal dynamics of N2O emission fluxes but had no significant effect on that of CO2 and CH4 emissions. High nitrogen treatment did not affect the seasonal dynamics of greenhouse gas emissions. Soil temperature significantly positively correlated with CO2 and CH4 emission fluxes. There was no correlation between soil temperature and N2O emission flux because the factors affecting N2O emission were complex.