The Scientific World Journal / 2012 / Article / Tab 2

Research Article

Ammonia Volatilization from Urea-Application Influenced Germination and Early Seedling Growth of Dry Direct-Seeded Rice

Table 2

Ammonia volatilization from three different soils with ammonium sulfate, urea, and urea + NBPT in comparison with zero N input (control) in Petri dish incubation experiment.

Soil sourceAmmonia volatilizationa (μg per Petri dish)
ControlASbUreab U r e a b + N B P T c

Soil I0 c0 c4029 a323 b
Soil II0 b0 b4250 a 0 b
Soil III0 c0 c1785 a136 b

Within a row, means followed by different letters are significantly different at 0.05 probability level according to Least Significant Difference (LSD) test.
aAmmonia volatilization was determined at four days after incubation.
bThe rate of ammonium sulfate and urea was 0.15 g N per Petri dish.
cThe rate of NBPT was 1.5 mg per Petri dish.

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