In spring, the temperature gradually rises, and the management of laying hens must be changed according to the changes in the climate. Otherwise, the egg production and egg production quality will be affected. The most direct manifestation is egg shell thinning, brittleness and affecting the breeding efficiency.
1. Reduce environmental impact. The environmental factors that have a greater impact on eggshell quality are temperature, light, and ammonia concentration in the house. In spring, when the temperature rises, the feed intake of the chicken decreases, the absorption rate of calcium in the intestine decreases, the high temperature causes the chicken to breathe faster, the discharge of carbon dioxide increases, the concentration of carbonic acid in the blood drops, and the eggshell thins. So when the temperature rises, you should pay attention to cooling. At the same time to properly increase the amount of calcium in the feed. Adding a certain amount of sodium bicarbonate to the diet to increase the concentration of carbonic acid in the blood also contributes to the improvement of eggshell quality. It is necessary to remove chicken manure in a timely manner, strengthen the ventilation of the house, and reduce the content of harmful gases such as ammonia and hydrogen sulfide in the house.
2. Mineral elements should be appropriate. The absorption of calcium and phosphorus in the body is always synergistic, and the appropriate amount of phosphorus can promote the absorption of calcium. In the brooding and rearing period, when the ratio of calcium to phosphorus is (1.5 to 2):1, the absorption and utilization of calcium and phosphorus is the highest. Therefore, inorganic phosphate or animal phosphate must be added to ensure the supply of phosphorus. In addition to phosphorus, the content of iron, magnesium, zinc, manganese, etc. in the feed will affect the absorption of calcium and phosphorus, and thus affect the quality of the eggshell. When the content of these mineral elements is high, they will form insoluble phosphates with phosphate ions and affect the absorption of calcium. Therefore, in the supplement of trace elements, the amount can not be too large, while paying attention to drinking water hardness can not be too high, calcium supplement feed can not contain more other mineral elements.
3. Timely elimination of older hens. Under normal feeding conditions, the uterine glands of young hens can normally secrete calcium carbonate. However, by the time of old age, the deposition of fat in the body will cause the uterine glands to deposit a certain amount of fat, thereby affecting the secretion function of the glands, making the shell thinner and brittle. At the same time, when the individual eggs are large in the late stage of production, the surface area of ​​the eggs will increase, which will cause the calcium supply to be slightly insufficient. The eggshell will become thinner and brittle and the older layer chickens should be eliminated in time.
4. Prevent disease in a timely manner. Under normal feeding conditions, soft shell eggs, brown eggs, etc., are often signs of disease. E. coli disease, Newcastle disease, egg production decline syndrome, infectious laryngotracheitis, etc. can cause uterine gland secretion disorders, thereby affecting the eggshell quality, at this time should be treated in time, so as not to affect the quality of eggs.
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