Figure 1
From: Effect of straw and inhibitors on the fate of nitrogen applied to paddy soil
Soil and urea-derived nitrogen with straw, inhibitor and nitrogen fertilizer application at three sampling stages. U: 15N labeled urea; US: 15N labeled urea + straw; UI: 15N labeled urea + inhibitor; UIS: 15N labeled urea + inhibitor + straw. (A) Ammonium (NH4+-N), (B) Microbial biomass nitrogen (MBN), (C) Fixed ammonium (FA), (D) Dissolved organic nitrogen (DON). Different capital letters represent significant differences of the same treatment at different sampling times; different lowercase letters represent significant differences among treatments during the same sampling period (Duncan, P < 0.05).
