With the increasing popularity of chicken production technology, the application of mineral elements in the production of chickens is becoming more and more widespread. Among them, the supplementation of calcium, phosphorus, and other elements that are most frequently found in laying hens has become a common concern. This article discusses how to supplement calcium in chicken production by talking a little superficial view.
Chicks and broiler chicken feed calcium content and too little too much harm
1. The suitable calcium content in the feed of chicks and broilers is 0.6%~0.9%, and no more than 1.0% at most, which can meet the needs of their growth and development. Because chicks and broilers require less calcium, the addition of calcium is mainly used for chicken bone growth.
2. If chicks and broiler chickens lack calcium in their diet, it will lead to growth retardation and skeletal dysplasia. Light bones will be brittle, deformed and bent, and form cartilage disease. Severe cases may develop rickets. Vitamin D deficiency is similar. If the content of calcium in 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 excretion of uric acid, and cause chicken gout.
Laying time of laying hens before laying and the harm of calcium supplement prematurely and too lately
1. The suitable calcium supplementation time for laying hens is generally 2 weeks prior to the start of production. The laying hens are approximately 18 weeks old. The broiler breeders are generally started at 22 weeks of age. At this time, the laying hens' feeds can be used directly. Or, on the basis of the feed of chicks and young chickens, feed each chicken with shell powder or calcium carbonate crumbs in quantities of 10g to 15g per day, and mix them in the feed to allow chickens to feed freely.
2. Pre-production calcium supplementation time can not be too early. Pre-production laying hens have less calcium requirements. Premature calcium supplementation is not conducive to the deposition of calcium in chicken bones. Second, it affects the absorption and utilization of calcium by chickens during laying. Because there is too much calcium in the feed, the ability to deposit calcium in the chicken's bones is reduced accordingly.
3. Late calcium directly affects the body condition and egg production. The requirement for calcium in laying hens is three to four times higher than that in brooding and rearing. If calcium is produced after laying hens are laid, hens will use the calcium in bones to meet the calcium requirement for laying. When quality is involved in egg shell synthesis, over time, it will cause calcium deficiency in laying hens, leading to the occurrence of diseases such as cartilage disease, rickets, and spasms, which will directly affect the egg production.
Appropriate calcium supplementation and favorable intake time for laying hens
1. The first layer of young laying hens (22 weeks to 40 weeks of age) is expected to have an effective calcium utilization rate of 60%, in order to meet the eggshell formation requirements for calcium, when the chicken production rate is 70 At %, the average calcium requirement per bird per day is at least 2.6 grams. When the chicken production rate reaches 80%, 90%, and 100%, the average calcium requirement per bird per day is 2.7. Grams, 3.0 grams, 3.3 grams. Considering the actual situation in actual production, for example, during the peak period of egg production, when the egg production rate reaches 95%, the actual egg production rate of most chickens in the flock is 100%. Therefore, the egg production rate is 100%. Sufficient calcium is necessary. That is to say, 3.3 grams of calcium per bird per day is the necessary amount of calcium in laying hens during the first phase of laying.
2. Increase the amount of calcium in feed after laying hens 40 weeks of age. After 40 weeks of laying, the egg weight increased, and the calcium content of each egg reached approximately 2.2 g. At this time, most of the laying chickens still maintained a high egg production rate. For chickens after weeks of age, the amount of calcium per day is generally 3.8 grams to 4.0 grams.
3. The amount of calcium in the feed should vary with feed intake. If the summer weather is hot, the feed intake of the chicken is reduced, and the calcium content in the feed should be appropriately increased. At the same time, attention should be paid to the ratio of calcium to phosphorus and vitamin D supplementation. Bone meal, vitamin A, D3 powder and concentrated fish liver oil can be added to the feed. .
4. The beneficial calcium supplementation time for laying hens. The time of calcium intake is related to the effect of egg shell formation. The most important time for calcium intake is afternoon, because the egg shell is completed in the afternoon and the calcium given in the afternoon is directly deposited into the egg shell without bones. Therefore, In the afternoon, large-grained calcium carbonate should be fed freely to laying hens; in order to meet the calcium requirements for eggshell formation, it is possible to recharge part of the night, which is a successful practice confirmed by several tests.
Suitable calcium source feed
Appropriate calcium source feeds are more commonly used in the production of stone powder, shell powder and eggshell powder.
1. Stone powder. Limestone powder, natural calcium carbonate. Generally containing about 38% of pure calcium, is the most inexpensive mineral feed supplement calcium, other more pure commodity calcium carbonate, chalk and old lime have the same effect as stone powder.
2. Shell powder. When shell powder is used as a calcium source feed, attention should be paid to the use of seashells that have accumulated on the seashore for many years, because the accumulated organic matter has disappeared after a long period of accumulation, and there are fewer germs; fresh shells should be disinfected because of the corruption of proteins and the attached bacteria. , More viruses, unsterilized often cause disease in chickens. General shell powder contains about 96.4% calcium carbonate, equivalent to 38.6% calcium.
3. Egg shell powder. The dried egg shells are made into eggshell powder as a calcium source feed, which will contain some organic matter, generally containing crude protein up to 12.4% and calcium containing 24.5%~26.5%. When using it, care should also be taken to prevent eggshell contamination.
CPE is the sub-data of saturation high grade (FEN), the appearance is white powder, non-toxic and odorless, with excellent weather resistance, ozone resistance, chemical resistance and aging resistance function, with excellent oil resistance, flame retardant and coloring function. Excellent toughness (still flexible at -30℃), excellent compatibility with other polymer materials, high differentiation temperature, differentiation to produce HCl, HCl can catalysis CPE dechlorination reaction.
Good Disposable Cpe Gloves,Disposable Gloves Wholesale,Surgical Disposable Gloves,Reusing Disposable Gloves
Shandong Haoyue Medical Technology Co., Ltd , https://www.haoyueyiliao.com