Effect of Calcium on Chicks and Breeding Chickens and Addition Methods

Chicks and broilers require less calcium, and calcium is used primarily for the growth of chicken bones. If the chicks and broiler chickens lack calcium in their feed, it will lead to cluster growth retardation, skeletal dysplasia, light bones brittle folding, deformation bending, the formation of cartilage disease; severe cases may develop rickets, its clinical symptoms and vitamin D deficiency The disease is similar. If the calcium content in the feed is too much, it will easily cause the deposition of calcium salts in the kidneys, endanger the normal development of the kidneys, affect the normal function of the kidneys, hinder the shooting of uric acid, and cause chicken gout.

Due to the miniaturization of laying hens, the shorter brooding time in 0-8 weeks is no longer modern.

First, the development of new breeds of laying hens. In order to give full play to the genetic performance of hens, we break the calendar to see chickens. The length of the sacrum is up to 86mm, and at the same time, the body weight corresponding to the age standard is used as the standard for the end of brooding (the sacrum and weight are both up to standard). . In this way, the time for using 0.9%-1% calcium in the brooding period was extended from 8 weeks to about 10 weeks for the "tibia, weight" double reaching the target (based on the actual patella and weight development, the time is for reference only). In the meantime, for the chickens using 4%-5% premix, there is no need to add extra stone powder, but in order to promote the grinding, digestion, and development of the muscles and stomachs of the chicks, it is advisable to start from 15 days of age at least three times a week. Add coarse quartz sand to the tray and add 0.2% to 0.3% of crude quartz grit directly. After the end of the gravel addition, when the sacrum and the weight were both up to standard, 0.3%-0.5% medium-sized granular stone powder was added to replace its function. For self-dosing or users using a small proportion of core material, use no fish meal diet, and add 1.5% dicalcium phosphate during the sacrum and body weight, and add about 1% of granular powder with 1.3-2mm in diameter ( The size of the pellets is approximately the size of northern yellow rice, and the size should be easy to feed.) Addition of a certain amount of fish meal can be appropriately reduced by the addition of calcium hydrogen phosphate and the like.

The total calcium content in the complete feed during the rearing period is preferably about 0.8%. Since the premix of 4%-5% together with corn, soybean meal and other raw materials contain approximately 0.7% calcium, so before the sexual maturity after the zygomatic bone and double weight reach the standard 2 weeks, for the use of 4%-5% bred premix, can add 0.3% -0.5% of the larger particles of the stone (to remove the added coarse grit, a 2-2.5mm particle is appropriate, that is, half a bean size). For the use of self-made core material, add not less than 1% of calcium hydrogen phosphate and 1.3%-1.5% of granular stone powder.

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