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Precautions for breeding laying hens


Laying hen breeding is very simple, but good breeding can reduce costs and increase benefits. At present, the technology of laying hen breeding in our country has matured. Today, this article will explain three commonly used and important things in laying hen breeding. I hope everyone will pay attention to it.

1. The main points of breeding and management of laying hens in spring
1. After the beginning of spring, the outside temperature gradually rises, which is suitable for the egg production needs of the chickens. When the temperature of the chicken house rises to 15 ℃, it is in the peak period of egg production (23-40 weeks old), middle stage (41-55 weeks old) and late stage (56-72 weeks of age) chickens have an upward trend in egg production. However, as the temperature increases, the feed intake of the flock will decrease. Therefore, the breeder must do a good job in the daily feeding and management of the chicken group: it is necessary to ensure that the chicken group is supplied with high-quality, balanced nutrition, and sufficient feed, especially the chicken group in the peak period of egg production; ensure the safety of the water source, and Ensure adequate drinking water supply, so as not to affect the performance of the chicken flock's egg production.
2. The large temperature difference between day and night in spring, especially the phenomenon of "back spring cold", leads to drastic changes in outside temperature, which can easily cause unstable egg production in chickens. The egg production rate fluctuates from 2% to 3% within a week. When encountering the "cold spring" weather, management should focus on ventilation, supplemented by ventilation, timely increase the control temperature of the fan, reduce the working frequency of the fan, ensure the temperature is stable and suitable, and reduce the stress caused by temperature fluctuations. When encountering strong winds or dusty weather, the opening distance and number of small ventilation windows should be reasonably controlled to reduce the air intake, reduce the wind speed, prevent the invasion of wind and reduce dust.
3. In the spring, everything recovers, and bacteria and viruses multiply faster. Especially in farms where chickens have been raised for many years, infectious bronchitis, Newcastle disease, avian flu and other diseases are extremely prone to outbreaks, which have an irreversible impact on chicken egg production. Therefore, in spring, attention should be paid to the growth and decline of antibodies to viral diseases such as infectious bronchitis, Newcastle disease in chickens, and avian influenza in laying hens, and timely supplements and exemptions are required to maintain the stability of laying eggs.
2. Forced moulting of laying hens
1. Compulsory moulting by chemical law
At present, the most commonly used chemical method is to feed high-zinc diets. For example, feeding 2% zinc-containing feed in the diet, the egg production rate of chickens dropped to below 50% of the original egg production rate after 3 days, and all production was stopped within 6-7 days. Two weeks after the zinc was removed, the hen's production rate would be reduced to less than 50% of the original egg production rate. The egg rate can exceed the level before zinc feeding.
2. The hunger law compulsory moulting
By cutting off water, feeding, and not supplementing artificial light, artificial stress factors are applied to the chickens, which disrupts the normal life of the chickens, resulting in an imbalance of hormone secretion, a decrease in progesterone, and a decrease in estrogen in the ovaries, resulting in atrophy of the follicles. Caused production suspension and moulting. The methods of forced moulting without water, feed, and starvation without artificial light can achieve certain results in practice.
① Fast forced moulting method: The goal is to restore 70% egg production rate to hens within 6 weeks. That is, the feed is cut off for 10 days and supplementary light is stopped, and drinking water is provided. After 10 days of feed cut, freely consume the feed of laying hens to restore the light before moulting.
②Ordinary forced moulting method: The goal is to make the egg production rate of chickens reach 70% or more within 6-8 weeks. Operation method: 10 days after the feed is cut off, the supplementary light will be stopped in the open chicken house, the light in the closed chicken house will be shortened to 8 hours, and the broken pellets will be fed continuously for more than 4 weeks from the 11th day, and the laying will start when the laying is resumed. Feed chickens and restore light.
3. Forced moulting by merger law
This method is an improved method of forced moult using the advantages of the starvation method and the chemical method. Methods as below:
Cut water and feed for 2 and a half days, stop artificial light supplementation, and supply drinking water. From the third day on, the chickens are allowed to freely eat the feed containing 2% zinc powder or 2.5% zinc sulfate, and feed them for 7 days. Generally, all production will be discontinued after 10 days, and normal light will be restored. The hens re-lay eggs 20 days after moulting. The hen reaches 70%-80% egg production rate 40 days after moulting. The combined method generally does not exceed 1% of the hen mortality during the moulting period.
3. Eliminate laying hens in a timely and reasonable manner
The egg production of chickens has just started for more than a year, and the next year it will be reduced by 15%, and the mortality rate will increase by about 15%. If forced moulting is used, it can be eliminated after 6 to 8 months of laying.
From the point of view of egg production, individuals with a laying rate of more than 80% of laying chickens have been declining until 400 days after the start of production; therefore, the chicken flocks eliminated low-yielding individuals after the first 300 days of production, and the egg production dropped significantly after the first 500 days of production. When the egg production rate drops below 65%, update the flock. Weak chickens have weak physique, shrunken crown, stale color, small distance between the pubic bones, yellow mouth, legs, and skin, slow movements, no eating habits, narrow abdomen, tight anus, dryness, weak gait, and abnormal stools. Chickens should be eliminated as soon as possible to reduce the spread of disease.

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