Management in the later stage of laying is also important. Management in the later stage of laying hens

The laying period of breeder chickens can be divided into three stages: the peak of egg production, the middle stage of egg production and the late stage of egg production. Breeders often pay attention to the feeding and management in the peak and middle periods, while neglecting the management in the later stage of egg production. In order to give full play to the production performance of breeder chickens and improve the efficiency, it is necessary to correct the traditional management concept, strengthen the management in the later stage of laying, and avoid the early end of the laying cycle.

Egg breeder

First, properly restrict feeding and reduce consumption:

The key to the management of the later stage of egg production is to restrict feeding to prevent overfertilized hens from affecting the performance of egg production and to ensure the continuity of egg production in the later stage. The principle of limiting feeding: combined with the egg laying curve, the method is to reduce the daily feed consumption of each chicken by 2.5g and observe for 5 to 7 days to see whether the decline in laying rate is normal (normal weekly reduction of 0.5% by 1%). If it is normal, it can be reduced by 1g or 2g; if it is still normal, it can be reduced by 3g. This not only does not affect egg production, but also can reduce feed consumption, reduce molting and prevent chickens from being overfed. If the egg production rate decreases rapidly, the feed quantity must be restored immediately so as not to reduce the production performance. Practice has proved that diet reduction is generally carried out 4-6 weeks after the peak of egg production, and the laying rate is 4%-6% lower than that of the peak.

Second, adjust the feed nutrition in different seasons:

The dietary nutrition of laying hens should change with the season in the later stage. When the summer temperature is high, the energy feed should be properly reduced and protein feed should be increased, while vitamin c and sodium bicarbonate should be supplemented at the same time; when the winter temperature is lower than 10 ℃, energy feed should be properly increased to improve the level of feed metabolic energy.

Third, properly supplement the content of calcium and vitamin D3 in the feed:

After the laying peak, the level of energy and protein could be decreased with the decrease of laying rate, but the calcium requirement of chickens increased with the increase of egg weight. It is suggested that shell powder or coarse limestone should be added to the feed from 3 pm to 4 pm every day, which can enhance the strength of eggshell formation at night and effectively change the quality of eggshell. The addition of vitamin D3 can not only promote calcium absorption, but also avoid the decrease of egg production caused by low feed intake, such as excessive addition of shell powder, which will decrease dietary palatability and feed intake.

Fourth, stimulate food intake:

According to the data, in order to maintain the strong appetite of the flock, breeder chickens can leave a certain empty slot time for the flock, on the one hand, prevent feed from being stored in the trough for a long time, on the other hand, it can avoid anorexia and picky eating habits. At the same time, according to the phenomenon of "dynamic feeding" of the flock, the feed can be evenly distributed in the trough every time it is fed, and the feed should be evenly distributed in the trough about 30 and a half hours after feeding, this is because the chicken is fed very quickly in the first 10 minutes after feeding, and will be picky about hook food later, so it is necessary to evenly feed and often check to see that the material is uneven in time. The practice of "leaving an empty trough to stimulate feeding" can be implemented in the later stage of egg production, but it is not recommended during the peak period of egg production.

5. Weighing regularly:

Managers often pay attention to the weighing of chicks and even the peak stage, while ignoring the weighing of chickens in the later stage of laying, this concept must be corrected. The weight change at this stage is of great guiding significance for reducing daily consumption, reducing dead panning and maintaining a steady decline in egg production. The flock of chickens in the later stage of laying eggs can be carried out at intervals of half a month or a month, but not every week. According to the numerical changes, combined with the egg production curve, the adjustment of related nutrients in the diet was comprehensively considered.

VI. combination of epidemic prevention and environmental control:

In the later stage of egg laying, due to the long-term use of the henhouse, the feces are concentrated, the concentration of harmful gas is high, the air quality is poor, all kinds of bacteria and viruses breed, and it is easy to cause a large number of bacterial or viral diseases. In the later stage of egg production, breeder chickens may be immunized for a long time, antibody levels decrease and lead to infectious diseases, or parasitic diseases of breeder chickens occur because of poor management. Therefore, at this stage, we should do a good job in the environmental hygiene of breeder flocks and disinfection of chickens in order to enhance their resistance to diseases. At the same time, it is necessary to supplement and immunize timely according to the change of antibody level to ensure that the antibody level of the body is uniform and effective.

VII. Timely elimination of low-yield chickens and low-yield chickens:

After a tense laying stage, the chickens in the late stage of laying can not meet the average daily egg weight expenditure of about 52g / day. while the egg production decreases, sudden death syndrome and ascites syndrome are easy to occur, which leads to the increase of death. At this time, it is necessary to timely adjust the evenness of the flock and eliminate the low-yield chickens with no feeding value, so as to increase the laying rate and reduce the cost.