(I) Application of vitamin D3 in laying hens In addition to the need for protein, carbohydrates and minerals, laying hens must pay attention to vitamin D supplementation, especially vitamin D3, because vitamin D3 is formed during the egg formation process. Plays a key role. The main role of vitamin D3 is associated with the absorption and utilization of calcium and phosphorus in animals. Vitamin D3 can promote the absorption of calcium and phosphorus in the digestive system. It can also promote the deposition of calcium and phosphorus in animals and increase the reabsorption of calcium and phosphorus in the kidneys, thereby reducing the excretion of these two elements.
After laying hens are fed diets that do not contain vitamin D3, the egg production will drop sharply, and the quality of the eggshell will also decrease, and most of them will be shellfish or soft shell eggs; when in the diet After recovering from the addition of D3, the egg production and eggshell quality will return to normal soon. When the amount of vitamin D3 in the feed is too much, the animal's digestive system will strongly absorb calcium, and cause excessive calcium deposition in the heart, blood vessels, joints, pericardium, and intestinal wall, resulting in calcification of animal tissues and organs, resulting in The joints of animals are stiff and swollen, and heart failure leads to stagnation.
The amount of vitamin D3 in the feed is affected by the level of calcium and phosphorus in the feed. When the levels of calcium and phosphorus in the feed are low, the high content of vitamin D3 is favorable for the deposition of calcium and phosphorus, so as to meet the needs of laying hens for eggshell synthesis; but when the levels of calcium and phosphorus in the feed are high, the laying hens The demand for vitamin D3 is reduced, and the lower concentration of vitamin D3 can meet the requirements for calcium and phosphorus in laying hens. Eggshell quality is best when 1500 IU of vitamin D3 is added per kilogram of layer feed.
(B) Vitamin D3 supply method During the high season of egg production, vitamin D3 can give full play to the chicken's production performance, and increase the feed compensation to a greater extent, so that the chickens produce more eggs and produce bigger eggs; during the low season of egg production (winter), vitamins D3 can increase egg production, change production season to egg production season, increase income, and increase the economic efficiency of raising chickens. Supply method:
1. Can feed more small fish, mixed shrimp and other aquatic animals, fish meal, blood meal, silkworm cocoons, insects, etc., because these animal feeds are rich in vitamin D3.
2. Can be fed more fresh green grass, eucalyptus leaves, eucalyptus leaves, cabbage leaves, carrots and other juicy green feed.
3. Pay attention to allow the chicken to take a lot of sun (especially in winter), carry out sun bathing, and also carry out artificial UV irradiation to promote the synthesis and absorption of vitamin D3.
4. For laying hens that do not see sunlight in the house, an appropriate amount of “multivitamins for livestock†and vitamin D3 preparations must be added to the feed.
After laying hens are fed diets that do not contain vitamin D3, the egg production will drop sharply, and the quality of the eggshell will also decrease, and most of them will be shellfish or soft shell eggs; when in the diet After recovering from the addition of D3, the egg production and eggshell quality will return to normal soon. When the amount of vitamin D3 in the feed is too much, the animal's digestive system will strongly absorb calcium, and cause excessive calcium deposition in the heart, blood vessels, joints, pericardium, and intestinal wall, resulting in calcification of animal tissues and organs, resulting in The joints of animals are stiff and swollen, and heart failure leads to stagnation.
The amount of vitamin D3 in the feed is affected by the level of calcium and phosphorus in the feed. When the levels of calcium and phosphorus in the feed are low, the high content of vitamin D3 is favorable for the deposition of calcium and phosphorus, so as to meet the needs of laying hens for eggshell synthesis; but when the levels of calcium and phosphorus in the feed are high, the laying hens The demand for vitamin D3 is reduced, and the lower concentration of vitamin D3 can meet the requirements for calcium and phosphorus in laying hens. Eggshell quality is best when 1500 IU of vitamin D3 is added per kilogram of layer feed.
(B) Vitamin D3 supply method During the high season of egg production, vitamin D3 can give full play to the chicken's production performance, and increase the feed compensation to a greater extent, so that the chickens produce more eggs and produce bigger eggs; during the low season of egg production (winter), vitamins D3 can increase egg production, change production season to egg production season, increase income, and increase the economic efficiency of raising chickens. Supply method:
1. Can feed more small fish, mixed shrimp and other aquatic animals, fish meal, blood meal, silkworm cocoons, insects, etc., because these animal feeds are rich in vitamin D3.
2. Can be fed more fresh green grass, eucalyptus leaves, eucalyptus leaves, cabbage leaves, carrots and other juicy green feed.
3. Pay attention to allow the chicken to take a lot of sun (especially in winter), carry out sun bathing, and also carry out artificial UV irradiation to promote the synthesis and absorption of vitamin D3.
4. For laying hens that do not see sunlight in the house, an appropriate amount of “multivitamins for livestock†and vitamin D3 preparations must be added to the feed.