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微信扫一扫As shown in Tables 1 and 2, for all the ammonium treatments in the 2 experiments the nitrification-denitrification loss as fluxes of（N2O+N2）-15N was very low（tr. -0.3% of added 15N）. From the high denitrifying activity in the rhizosphere and nonrhizosphere soils mentioned above, it seems reasonable
