Box Mod
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The egg yolk color is formed during the feed intake and the fat-soluble pigments are deposited in the egg yolk during egg formation. The color of the egg yolk is related to the carotenoids, lutein, zeaxanthin, etc. in the feed, but it has nothing to do with the nutritional value of the egg yolk. For consumers, red and yellow eggs are more popular than yellowish eggs. There are many reasons why egg yolks are light in color: The amount of lutein in the diet is insufficient. Some feed ingredients have low levels of lutein (wheat, barley, rice, or their by-products). If there is more of these feeds in the hen's diet, the yolks will be poorer in color. disease. Coccidiosis, cryptospores, malabsorption, or other viral diseases all affect pigmentation. Contamination of feed by mycotoxins can reduce the coloration of the egg yolk. If the storage time is too long, the oxidation of lutein in feed ingredients such as corn and corn gluten meal will gradually reduce the lutein content. The yolk development time is not sufficient. Pigmentation increases with the development of follicles in the ovary, and follicular development (predominantly from small vesicles) takes 10 days, so it takes 10 days for the egg yolk to completely color. It is advisable to feed the pigmented feed for two weeks before egg production so that the color is completely produced. Vitamin A deficiency. Many carotenoids have pro-vitamin A activity. If vitamin A is insufficient, carotenoids will be converted to vitamin A to meet the nutritional requirements of the layer, which will reduce the extent of pigmentation. The correct amount of vitamin A added should balance these two effects. In order to deepen the color of egg yolk, in addition to strengthening the management of feeding and eliminating the above-mentioned factors, measures such as increasing the amount of color-enhancing substances and supplementing the egg yolk color enhancer can also be taken. Commercial additives can effectively enhance the degree of coloration to the desired level (Kali-sin Red and Garrison Yellow). Only 30 grams of red lividin per ton of feed is required to deepen the egg yolk color of the corn that is fed. Garez yellow is only needed when the yellow corn content in the diet is less than 35%. However, if you add 20-40 grams of yellowish yellow can make egg yolk more bright color. In the actual breeding, there are many natural additive feed additives are more commonly used. For example, there are more than 30 varieties, such as calendula, peacock grass, kelp powder, spirulina powder, seaweed powder, honey, ryegrass, leeks, carrots, pumpkins, yellow corn, and cow dung powder. The above recommended feed additives are all natural colorants, safe and non-toxic, and can be safely eaten after the "Red Heart" or "Three Yellow Chicken" produced after feeding.