1, research significance of nitrogen fertilizer corn growth at home and abroad: nitrogen fertilizer is of great significance to the growth and development, quality and yield formation of corn.

2. Research value of nitrogen fertilizer corn growth at home and abroad: Ammonia is a component of amino acids in plants, a component of protein and a component of chlorophyll that plays a decisive role in plant photosynthesis. Atmospheric fertilizer is the most needed fertilizer for Kami's growth and plays a very important role in the growth of corn.