Corn is the main grain feed and energy feed in China. Corn has good palatability and no use restrictions. Its nutritional characteristics are as follows:

1. High available energy. The metabolic energy of corn is 14.06 MJ/K8, and the highest is 15.06 MJ/kg, which is the highest among cereals. This is mainly because there is very little crude fiber in corn, only 2%; The nitrogen-free extract is as high as 72%, and the digestibility can reach 90%. On the other hand, the crude fat content of corn is relatively high, ranging from 3.5% to 4.5%. Corn is an annual gramineous plant, also known as corn, cob and Liugu. According to the research, every100g of corn contains 196 calories,10.2g of crude fiber, 3.8g of protein, 2.3g of fat, 40.2g of carbohydrate, and other mineral elements and vitamins. Corn contains more crude fiber, which is 4- 10 times higher than polished rice and refined flour. Corn also contains a lot of magnesium, which can strengthen the peristalsis of intestinal wall and promote the excretion of waste in the body. The above ingredients and functions of corn are very beneficial to lose weight. When the corn is ripe, the tassel on the ear has diuretic effect, which is also beneficial to lose weight.

Corn can be boiled in soup instead of tea, or crushed to make corn flour and tortillas. Puffed popcorn has a large volume, which can eliminate the hunger of obese people, but its calorie content is very low after eating, and it is also one of the substitutes for weight loss.

2. The linoleic acid content is high. The linoleic acid content of corn reaches 2%, which is the highest in grain feed. If the proportion of corn in the diet is above 50%, only corn can meet the requirement of linoleic acid for pigs and chickens (1%).

3. The content of protein is low and the quality is poor. The content of protein in maize is about 8.6%, with unbalanced amino acids and insufficient contents of lysine, tryptophan and methionine.

4. Minerals About 80% of minerals exist in embryos, and the calcium content is very small, about 0.02%; The phosphorus content is about 0.25%, but about 63% of phosphorus exists in the form of phytic phosphorus, and the utilization rate of monogastric animals is very low. The content of other mineral elements is also low.

5. Vitamin fat-soluble vitamins contain more vitamin E, about 20mg/kg, yellow corn contains more carotene, and vitamins D and K are almost absent. Water-soluble vitamins contain more thiamine, less riboflavin and nicotinic acid, and nicotinic acid exists in a combined form.

6. The average lutein content in yellow corn is 22 mg/kg, which is one of the characteristics of yellow corn and is of great significance for coloring yolk, shin and claw.