Laying time selection of laying hens

The absorption of calcium in laying hens varies depending on factors such as climate, light, source of calcium, and the absorption of calcium by the individual. Generally, calcium is temporarily not required within 8 to 10 hours after the egg is laid, but it is necessary to absorb a large amount of calcium during the formation of the eggshell at night to promote eggshell formation. The hen's ability to retain calcium is limited, and the survival rate is only about 50%, especially powdery calcium. After eating, it is absorbed and utilized, and excess is quickly eliminated from the body. According to the physiology and biochemistry of laying hens and tests, it is shown that the effect of calcium supplementation is best when the chicken is fed every day at 12-18 hrs, and it is best to feed the powdered calcium feed. It dissolves slowly in the digestive tract and can be stored in the eggshell at night. When actually formed, the contained calcium is released into the blood and used, and calcium in the bone marrow is not used due to lack of calcium, so as to maintain stable production and high yield of laying hens.

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