Enhancing nitrogen use efficiency and yield of maize (Zea mays L.) through Ammonia volatilization mitigation and nitrogen management approaches

Table 2 Effects S-coated urea on total ammonia losses (kg ha⁻¹), N lost as NH₃ (% of the applied N) and % difference in NH₃ loss relative to urea at 200 kg N ha⁻¹

Treatments	NH₃emission (kg ha⁻¹)	N lost as NH₃ (% of the applied N)	% difference in NH₃ loss relative to urea at 200 kg N ha⁻¹
Control	1.6 ± 0.41^g
Urea₁₅₀	47.8 ± 2.81^f	30.8
Urea₂₀₀	61.3 ± 2.74^e	39.8
Urea₁₅₀ + S	28.5 ± 1.51^d	17.9	−58
Urea₂₀₀ + S	35.6 ± 1.48^c	17	−42
SCU₁₅₀	15.8 ± 1.32^b	09.1	−74
SCU₂₀₀	21.2 ± 1.41^a	09.8	−65

Within columns, means with the same letters are not significantly different at the P < 0.05 level where n = 3. Means±standard errors (n = 3)

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