Calcium is an indispensable feed for laying hens. If there is insufficient calcium in the feed, it will directly affect egg production, egg shell thickness, egg fertilization rate, chick hatching rate and serum calcium content.
1. Calcium supplementation time: When hens are in continuous production, they usually lay eggs in the morning, and the next yolk is discharged from the ovary into the fallopian tube half an hour after the egg is laid. Therefore, continuous-producing hens do not need calcium supplementation in the morning. After 14:00 in the afternoon, with the increase of eggshell deposition rate, the amount of calcium feed that chickens eat also increases. Therefore, in order to make laying hens produce more eggs and produce good eggs, it is best to supplement calcium feed for laying hens from 12:00 to 18:00 every day.
2. Calcium supplementation method and effect: The calcium source feed can be placed alone, and the chicken can eat freely, or it can be mixed with the feed. According to the experiment, calcium source feed has a good effect on improving egg production, egg fertilization rate, hatching rate of chicks, serum calcium content and egg shell thickness.
3. The amount of calcium supplementation: The production of laying hens requires calcium supplementation, but it is not the more the better. Generally, laying hens need 4.4 grams of calcium per egg, and the calcium content in the diet is 3.0%-3.5% to meet the production needs of laying hens. If the calcium content in the diet exceeds 4.0%, adverse symptoms will occur: on the one hand, the palatability of the feed will become poor, and the feed intake of the flock will decrease; on the other hand, it will cause the accumulation of urate in the laying hens and cause indigestion And cause diarrhea, severe gout symptoms will appear. Therefore, calcium supplementation for laying hens must be paid attention to in a timely and appropriate amount.
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