The study looked at how different amounts of nitrogen fertilizer and application methods affect the loss of ammonia gas during different stages of plant growth. They found that higher nitrogen levels led to more ammonia gas being lost, and the loss increased with higher nitrogen application amounts. The most significant loss occurred during the tillering stage, followed by the basal fertilizer stage, with the least loss during the panicle fertilizer stage. After each fertilization, the peak of ammonia gas loss occurred within 2 to 4 days and lasted about a week. The more nitrogen applied, the more ammonia gas was lost, with the deep application method showing the most significant impact.