Captive egg duck calcium supplement method

Choose a good source of calcium. Limestone, shells, etc. are generally used as the main source of calcium, but the proportion should be appropriate. The ratio of stone powder and shell powder is appropriate to 2:3. Feeding 1% bone meal can make the eggshell's strength and smoothness the best.

The calcium time is appropriate. Captive ducks start laying eggs around the age of 100 days, and 15 weeks of age is the best time to start calcium supplementation. Calcium should be between the young duck and the laying duck, with an appropriate rate of 2.5%, and gradually increase thereafter.

The best amount of calcium in each stage of egg production. The utilization of calcium in ducks is approximately 65%, and the production of eggs requires 4.8g to 5.12g of calcium. Practice has proved that when the egg production rate is below 65%, calcium is 2.5%; when egg production rate is between 65% and 80%, calcium is 3%; when the egg production rate is above 80%, calcium is between 3.2% and 3.5%.

It is best to use calcium supplement particles. Granular calcium stays in the digestive tract for a long time. It can evenly supply calcium during the eggshell formation phase. At the same time, granular calcium has a grinding effect similar to that of sand in the stomach, which can promote the digestion and utilization of feed. Practice has shown that with 50% of the shells and 50% of limestone in combination, the duck can absorb calcium well. According to the egg production rate, ensure 14 hours to 17 hours of light, because sunlight can make feathers, skin ergosterol in the blood into vitamin D, which is conducive to the absorption and utilization of calcium.

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