The best calcium supplementation time for laying hens is from 12:00 to 20:00. When the hens freely eat calcium, they can self-regulate the amount of calcium they eat. For example, the amount of calcium consumed during eggshell formation is 92% under normal circumstances. However, during the non-formation of egg shells, the amount of calcium consumed was only 68%. Hens who are lighter and eat less should be given more calcium.

Chickens have the best absorption of animal sources of calcium, and the absorption of plant-derived calcium sources is the worst. Egg shells that have been sterilized at high temperatures are the best sources of calcium. When the source of calcium in the diet is 2/3 shells and 1/3 limestone, the eggshell strength is best. When the shelling rate of B-4 hybrid chicken reached 3.5% during the first 61 weeks, the percentage of broken eggs was significantly reduced and the eggshell was smooth after supplementing 2% of the total shellfish powder in the afternoon. The average egg breaking rate was only 1.59 by 72 weeks of age. %, the effect is good.

The calcium deficiency of laying hens should adjust the proportion of nutrients in the feed, and pay attention to adding fishmeal, bone meal, shell powder, eggshell powder or stone powder to ensure the proper calcium content. The laying hens should start from about 18 weeks old and the shell powder should be increased to 2%; after 20 weeks of age, they should enter the egg production period, and the bone meal content in the feed should reach 1.5% and shell powder should reach 5.5%; after 38 weeks of age, the shell powder should be The content can be increased to 6.5%. When the egg laying rate is 80%, the calcium content in the diet should reach 3.5%. When the laying rate is less than 80% or greater than 65%, the calcium content is 3.4%. When the egg production rate is less than 65%, the calcium content is 3.2%.

In addition, multivitamins can be properly added in the feed, if appropriate, cod liver oil can also be added in an appropriate amount, and the chickens can be appropriately exposed to sunlight or ultraviolet light to increase the vitamin D source. All factors that increase the acidity of the intestinal tract are beneficial to the dissolution of calcium salts and promote the absorption of calcium. Special attention should be paid to the prevention of excessive calcium when preventing calcium deficiency and calcium supplementation.

Fire Fighting Boots

Fire Fighting Boots,Rubber Fire Fighting Boots,Firefighter Work Boots,Firefighter Duty Boots

NINGBO TOMAN IMP. & EXP. CO., LTD , https://www.tdotmfiresolution.com