Nitrogen transformations of ammonium sulfate and alanine in submerged Maahas clay

摘要: Abstract The fate of added nitrogen in submerged soils was studied using 15N-labelled ammonium sulfate and alanine. After 8 weeks incubation 25 22%, respectively, from alanine were recovered the soil. Under experimental conditions used to presubmerged lost rapidly outside soil-water system, regardless whether organic or inorganic. Fractionation studies revealed that amount tagged N incorporated into exchangeable ammonium, residual fractions, volatilized as NH3 chemically fixed not enough account for loss. loss attributed nitrification subsequent denitrification during period. effect N-Serve [2-chloro-6-(trichloromethyl)pyrimidine] on (NH4)2SO4-in studied. About 15% more non-presubmerged soils, less nitrate accumulated soils...