Corn is one of the most important plants which is considered as main food in many countries such as central and South America, Africa and part of  Asia, and it is one of the most important sources of energy and protein and have an annual production of nearly 500 million tons, according to the climate variation in many parts of the country, corn cultivation is expandable after harvesting the grains. Among grains after wheat and rice corn has  the third place in economics point of view, but in production point of view it is at the first place, while as the corn has compatibility with different climatic conditions, corn cultivation is expanding all over the world. So that today it is one of the most popular products in tropical and subtropical areas. Corn has high potential for conversion of the solar energy (c4). Corn contribution in human nutrition is 20-25% and in animal corn and poultry nutrition is 70-75% and other by products is 5%.