A study to explain the emission of nitric oxide from a marsh soil

摘要: In the period 18–21 September 1989, soil NO emission was studied at Halvergate Marshes, Norfolk (U.K.) within framework of BIATEX-LOVENOX joint field experiment. Using a dynamic chamber technique, 186 measurements four plots were performed showing net flux 7.2−14.6×10−12 kgN m−2 s−1. Soil samples from profile (1.0 m) representative site and uppermost layer (0.1 each sent to laboratory for (a) detailed physical chemical analysis, (b) determination production rates, uptake rate constants, compensation mixing ratios, (c) characterization microbial processes involved. A diffusive model (Galbally Johansson, 1989) applied results infer fluxes individual samples. When we compared these with those measured in field, found agreement factor 2–4. Furthermore, studies showed, that produced consumed only upper (0–0.1 m depth) consumption activities observed marsh most probably due anaerobic metabolism denitrifying bacteria operating microniches generally aerobic soil.