The study looked at how nitrogen fertilizer affects the growth and yield of two types of early hybrid rice in Fujian. They found that applying 150kg of nitrogen per hectare can increase grain yield, plant dry matter, and the amount of nutrients transferred to the grains. However, too much nitrogen can lead to decreased seed setting rate and other negative effects. The research showed that the amount of nitrogen applied can impact various aspects of rice growth, such as panicle size, plant height, and grain weight. Overall, the study highlights the importance of carefully managing nitrogen fertilization to optimize rice production.