Although the degree of coloration of the broiler's epidermis has nothing to do with its nutritional value, due to the influence of traditional culture, the majority of consumers and breeders still regard broiler coloring as one of the main indicators to measure the quality of broiler chickens, directly affecting the price of the broiler chicken market. And demand.
Broilers cannot synthesize lutein by themselves and can only be obtained from feed. In order to obtain the ideal skin color, chemical colorants such as galactin and galacto yellow are commonly added to the broiler feed. Such colorants are sold. The price is higher. After the addition, the feed cost is increased and remains in the livestock and poultry. The content of lutein in corn gluten meal is as high as 90-180mg/kg, which is more than 5 times that of yellow corn. It can be effectively absorbed, and it can make the eggs golden yellow and the chicken skin yellow. The price of corn gluten meal is similar to the price of soybean cake. In view of this, zein powder plus azan acid can be used instead of chemically synthesized colorants to improve the coloration of broilers.
In the diet of the experimental group, 2.5% corn gluten meal and 90 mg/kg azasyanide were added, and the colorant control group diet was supplemented with 100 mg/kg galizarin red. The blank control group did not add any coloring matter to the diet. RESULTS: The color score of the test group and the colorant control group was significantly higher than that of the blank control group. The difference in the color grade between the test group and the colorant control group was not significantly different. The broiler color of the experimental group was dark yellow and the appearance was in line with people. The spending habits. From the effect of slaughter of broilers, the effect of adding corn gluten powder is similar to that of adding celecoxib, which is very significantly higher than that of the control group. The effect of natural lutein in feed is better than that of chemical synthetic coloring agents. The effect is slightly worse, but by adding aphanelic acid, it promotes the metabolism of the body and improves the deposition rate of lutein in the feed, thus changing the degree of pigmentation of the broiler epidermis. The effect is obvious.