2. Compared with traditional food crops such as rice and wheat, corn has strong drought tolerance, cold tolerance, barren tolerance and excellent environmental adaptability. Corn has high nutritional value and is an excellent food crop. As a high-yield grain crop in China, corn is an important feed source for animal husbandry, aquaculture and aquaculture, and it is also one of the indispensable raw materials for food, medical care, light industry, chemical industry and other industries. Because corn resources are extremely rich, cheap and easy to obtain, it also has many biological activities such as antioxidation, lowering blood sugar, improving immunity, bacteriostasis and sterilization. It has broad development and application prospects.