Laying hens require a large amount of calcium and phosphorus during the laying period. About 90% of calcium is used in bones and egg shells. About 80% of phosphorus forms bones together with calcium. The rest of calcium and phosphorus are distributed in tissues of the body. Egg shells account for about one-tenth of the egg weight, and 90% of the shells are calcium carbonate. A weight of about 50-60 grams of egg calcium carbonate 4.5-5.4 grams, according to the calcium utilization rate of 60% conversion, each producing an egg about 10 grams of calcium carbonate, purified calcium 3.5 grams. However, body calcium in chickens is limited to only about 15 grams. According to the need for egg production, hens (including bone calcium) are only enough to produce 3-4 eggs, so they need a lot of calcium. However, in the calcium supplement, we must choose the source of calcium.
1. Do not feed raw meal
Since the production process of processed bone meal is different, the quality of its products varies greatly, so there is a difference between steamed bone powder and raw meal. Steamed batter is a product that has been processed, removed of most of the protein and fat, and pressed, dried and crushed. Steamed bone powder is white or silver grey, no odor, 30% calcium, 14.5% phosphorus, 7.5% crude protein, 1.2% crude fat.
The so-called bone meal is a kind of inferior bone meal that is produced under the condition of equipment. It is a simple flush of the bones and then cooked in a cauldron for several hours without pressure or degumming. Then remove the pan, dry it, and pulverize it. This bone powder has an odor, black or dark gray, 23% calcium, 10.5% phosphorus, 21% crude protein, 5% crude fat.
If you use this kind of bone meal for a long time to feed hens because it has not been treated with high temperature and high pressure, bone calcium is combined with bone glue. The absorption of calcium by the chicken body is much worse than that of steamed bone powder. A long time will cause the imbalance of calcium and phosphorus in the chicken body, resulting in a decline in laying ability of laying hens and causing significant economic losses to chicken production. Therefore, chicken farmers, especially large-scale chicken farms, must pay attention to avoid feeding chickens with raw bone meal ingredients.
2. Can not feed sheep bone powder
In places where there are more sheep, people often process goat bones into sheep bone powder and add it to animal feed instead of other bone meal. This is okay for most livestock and poultry, and it works well, but it is not enough for laying hens. Because the egg shell is formed in the chicken body, the temperature should not be too high. The sheep bone powder is hot. When taken up by laying hens and involved in egg shell formation, the temperature in the chicken will increase. This will not only affect the formation of egg shells, but will also reduce the egg production rate. Therefore, layers cannot feed sheep bone powder.
3. The best choice for coarse calcium sources
During egg production, calcium in the diet should be supplied in the form of shells or coarse-grained limestone, because this granular calcium leaves the stomach at a slower rate, and it works well to increase the strength of the eggshell that forms the shell at night.
Stone powder. Limestone powder, natural calcium carbonate. Generally containing about 38% of pure calcium, is the cheapest calcium mineral feed supplement, and other more pure commercial calcium carbonate, chalk and old lime also have the same effect as stone powder.
1. Do not feed raw meal
Since the production process of processed bone meal is different, the quality of its products varies greatly, so there is a difference between steamed bone powder and raw meal. Steamed batter is a product that has been processed, removed of most of the protein and fat, and pressed, dried and crushed. Steamed bone powder is white or silver grey, no odor, 30% calcium, 14.5% phosphorus, 7.5% crude protein, 1.2% crude fat.
The so-called bone meal is a kind of inferior bone meal that is produced under the condition of equipment. It is a simple flush of the bones and then cooked in a cauldron for several hours without pressure or degumming. Then remove the pan, dry it, and pulverize it. This bone powder has an odor, black or dark gray, 23% calcium, 10.5% phosphorus, 21% crude protein, 5% crude fat.
If you use this kind of bone meal for a long time to feed hens because it has not been treated with high temperature and high pressure, bone calcium is combined with bone glue. The absorption of calcium by the chicken body is much worse than that of steamed bone powder. A long time will cause the imbalance of calcium and phosphorus in the chicken body, resulting in a decline in laying ability of laying hens and causing significant economic losses to chicken production. Therefore, chicken farmers, especially large-scale chicken farms, must pay attention to avoid feeding chickens with raw bone meal ingredients.
2. Can not feed sheep bone powder
In places where there are more sheep, people often process goat bones into sheep bone powder and add it to animal feed instead of other bone meal. This is okay for most livestock and poultry, and it works well, but it is not enough for laying hens. Because the egg shell is formed in the chicken body, the temperature should not be too high. The sheep bone powder is hot. When taken up by laying hens and involved in egg shell formation, the temperature in the chicken will increase. This will not only affect the formation of egg shells, but will also reduce the egg production rate. Therefore, layers cannot feed sheep bone powder.
3. The best choice for coarse calcium sources
During egg production, calcium in the diet should be supplied in the form of shells or coarse-grained limestone, because this granular calcium leaves the stomach at a slower rate, and it works well to increase the strength of the eggshell that forms the shell at night.
Stone powder. Limestone powder, natural calcium carbonate. Generally containing about 38% of pure calcium, is the cheapest calcium mineral feed supplement, and other more pure commercial calcium carbonate, chalk and old lime also have the same effect as stone powder.
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