Research Article
Ammonia Volatilization from Urea-Application Influenced Germination and Early Seedling Growth of Dry Direct-Seeded Rice
Table 3
Seed germination percentage, shoot fresh weight, root fresh weight, and root tip number of rice variety Apo grown in three different soils with ammonium sulfate, urea, and urea + NBPT in comparison with zero N input (control) in Petri dish incubation experiment 2. The presoaked seeds were not in contact with soil but exposed to ammonia gas volatilized from soils.
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Within a row, means followed by different letters are significantly different at 0.05 probability level according to Least Significant Difference (LSD) test. aThe rate of ammonium sulfate and urea was 0.15 g N per Petri dish. bThe rate of NBPT was 1.5 mg per Petri dish. |