(a) Calcium requirements for each stage of egg production

One duck eggshell contains 2.9 to 3.02 grams of calcium, and the utilization of calcium in ducks is about 65%. Therefore, it takes 4.8 to 5.12 grams of calcium to produce 1 egg. Reasonable calcium supplementation can reduce the rate of egg breakage. If there is insufficient calcium in the feed, calcium will be used to form egg shells. The longer the calcium in the bone is passively used to form the shell, the worse the shell strength. Not only will there be soft-shelled eggs or shellless eggs, but it will also promote the consumption of feed, increase feed and eliminate fat, promote fatty deposits in the liver and muscles, and seriously affect the egg production rate. Conversely, excessive supply of calcium will reduce the appetite of laying ducks and significantly affect egg production.

Therefore, under normal circumstances, the reasonable demand for calcium in laying ducks is: when the laying rate is below 65%, calcium is 2.5%; when the laying rate is between 65% and 85%, calcium is 3%; the egg production rate is 80 Above %, calcium is from 3.21% to 3.5%.

(B) suitable for calcium time

Feeding and management are normal, and most ducks start production around the age of 100 days. Unopened female ducks also actively store calcium in bones in preparation for egg production. At this time, the amount of calcium in the diet should be increased, so 15 weeks of age is the best time to start calcium supplementation. The amount of calcium should be between the young duck and the laying duck, and calcium should be 2.5%, and gradually increase later.

(C) choose the right source of calcium

Calcium carbonate, shells, and bone meal are all good sources of calcium. Limestone and shells are the main sources of calcium. But the proportion should be appropriate, stone powder, shell powder ratio of 2:3 is appropriate, plus feeding 1% of bone meal, eggshell strength, smoothness is the best.

(D) Factors Affecting Calcium Absorption

1. Calcium-phosphorus ratio The high level of phosphorus in the bone will reduce the calcification of calcium in the formation of eggshell, so the appropriate ratio of calcium to phosphorus is 5 to 6.5:1.

2. Vitamin D3 Vitamin D3 is involved in the whole process of calcium and phosphorus metabolism of the body. It is a calcium-binding protein that is necessary to activate bone calcium metabolism. When egg ducks lack vitamin D3, eggshell quality decreases, and the hatching rate of soft shell eggs and breeding eggs is low.

3, light irradiation by the body of the sun, can promote surface blood circulation, so that ergosterol into vitamin D3. Therefore, egg-laying ducks must ensure 14-17 hours of light every day, which is beneficial to the absorption and utilization of calcium and increase the egg production rate.

4, the temperature is too high, the harmful gas in the duck house, such as carbon dioxide, hydrogen sulfide, ammonia content will also increase accordingly, is not conducive to the absorption of calcium. Especially in the winter, under the condition of ensuring temperature, ventilation and ventilation must be strengthened.

5. Energy level in the diet The energy level of the diet will increase or decrease with the level of calcium, which is more conducive to the absorption and utilization of calcium.

Destoner has two types. Air Blowing type and Air Suction Type.

The Air Blowing Type Destoner has air blowers in bottom, with more quantity of air blowers, which can provide larger air volume for easy separation of stones and seed. The Blowing Type Destoner also has bigger size processing table, which can process the seed sufficiently .

Function of Destoner:

Destoner Machine is used to remove sand, stones, metals from good grain , seed, beans. It is also called Dry Stoner, Stone Removing Machine.

Its working principle is based on gravity weight, to remove heavier impurities from good materials.

Working Process of Destoner:

The working process is : when seed flow into vibration deck/sieve, with the combined work of vibration and air blowing, the heavier materials and lighter materials will separate in different layers and discharge from different outlet.

Application of Destoner:

Our Destoner Machine can be used for all kinds of seed, grain, beans, such as wheat, maize, rice, paddy, sesame, red beans, chickpea beans, soybeans, sunflower seed etc.

We also provide extra table or different sieves to process different materials.

Specification of Air Blowing type Destoner:

Air Blowing Type Destoner

Air Blowing Type Destoner,Grain Bean Destoner,Rice Stone Removing Machine,Rice Soybean Destoner Machine

SHIJIAZHUANG SYNMEC INTERNATIONAL TRADING LIMITED , https://www.seedgraincleaner.com