How did corn come from?

Corn is native to Central and South America. Now it is cultivated all over the world. Mainly distributed in latitude 30-50. The largest planting areas are the United States, China, Brazil, Mexico, South Africa, India and Romania. The main corn producing areas in China are northeast, north and southwest mountainous areas.

Corn is one of the most important foods in the world. Today, about one-third of the world's population takes corn as the main food, and corn accounts for 50% of the food composition of Asians.

Corn kernels are important industrial raw materials, and two or three hundred kinds of products can be produced by primary processing and deep processing. Primary processed products and by-products can be used as basic raw materials for further processing and utilization, and can be used to manufacture a variety of products in industrial production such as food, chemical industry, fermentation, medicine, textile and paper making.

Extended data:

Growth habit

Corn is a thermophilic crop, which needs higher temperature during the whole growing period. The biologically effective temperature of maize is 65438 00℃. Seeds germinate at 6- 10℃, germinate slowly below 10℃, germinate vigorously at 16-2 1℃, and the optimum germination temperature is 28-35℃, and stop germination above 40℃.

Corn plants are tall and have large leaf area, so it needs more water. Drought affects the yield and quality of maize. It is generally considered that the area below 150mm in summer is not suitable for planting corn, but too much precipitation will affect the light, increase the harm of diseases, lodging and weeds, and also affect the improvement of corn yield and quality.

Corn is not very strict with the soil. Chernozem, chestnut soil and sandy loam have loose soil, deep soil layer and rich organic matter.