An evaluation of urine patch simulation methods for nitrous oxide emission measurement.
作者： P. J. FORRESTAL , D. J. KROL , G. J. LANIGAN , M. M. R. JAHANGIR , K. G. RICHARDS
DOI: 10.1017/S0021859616000939
关键词:
摘要: Global nitrous oxide (N2O) inventory estimates for pasture systems are refined based on measurements of N2O loss from simulated urine patches. A variety methods used patch simulation but they frequently use a uniform wetted area (UWA), often smaller than bovine patch. However, natural patches follow non-uniform infiltration patterns expanding naturally point deposit with non-wetted zone influence. Using 2 litres the UWA method was compared, using 0·156 m2 collar, effective (NEEA) method, 0·462 collar under high (HL) and low (LL) conditions. The chosen affects nitrogen (N) loading to soil. Under HL induced N2O-N 280·6 mg/patch, significantly less 434·8 mg/patch NEEA same urination. LL there no effect. Efforts should be made employ methods, which mimic deposits can achieved, at least in part, by: (a) volume N content similar that animal interest. (b) Allowing permit tapering towards edges. (c) Measuring influence addition area, i.e. area.
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