Abstract: In this paper, the general equation for volatilization losses of the ammonia was established based on the analysis for the dominant factors affecting the extent ammonia volatilization. The hydrogen bonds between DCD presented in DEAB and free state ammonia dissociated from AB are probably formed and are well documented by the spectra and properties of DEAB. This interaction force could drop the ammonia apparent concentration and lower pH 0.2～0.4 during ammonia volatilization. As compared with AB, DEAB could delay the formation of nitrogen as nitrate species, reduce the loss of nitrogen by leaching and increase NH₄⁺-N inventory in soil. Thus, DEAB can regulate the nutrient accommodation in form, time and amount, reduce pollution of ground and surface water by fertilizer-derived.

Key words: Ammonium bicarbonate, Durably efficacious ammonium bicarbonate, Dicyandiamide, Ammonia volatilization, marine ranching, Sebastiscus marmoratus, stable isotope, Ma’an Archipelago, feeding habit