Corn, also known as corn, corn kernels, corn kernels, pearl rice, etc., is an annual tall herbaceous plant in the Poaceae family of the genus corn. Corn stalks are upright, usually unbranched, 1-4 meters high, with aerial support roots at each node of the base, flat and broad leaves, linear lanceolate, and orange yellow anthers; The caryopsis is spherical or oblate in shape, and its size varies with different growth conditions. The flowering and fruiting period is in autumn. It is cultivated in various parts of China and widely grown in tropical and temperate regions around the world as an important grain. Corn has strong drought resistance, cold resistance, poor tolerance, and excellent environmental adaptability, with high nutritional value.