The reason for the slow increase of laying rate of laying hens

Under the correct feeding and management conditions, the laying rate of good reserve chickens can reach 50% at the age of 23 weeks, the egg laying rate can rise to more than 80% after 3 weeks, and the egg laying rate can exceed 90% at the age of 28 weeks. In actual production, it is often seen that the first day of laying of many chickens is delayed, and the egg laying rate increases slowly after the start of laying. The egg laying rate reaches 80% only at the age of 28 weeks, and the peak is less than 90% later. The main reasons are:

The main results are as follows: 1. The reserve chicken is not well cultivated, and its growth and development is hindered, especially after 12 weeks of age, the body weight does not reach the breed standard, and the weight uniformity of the flock is not good.

2. The pre-production material is still used when the feed is not changed in time or when the laying rate reaches 5% after being transferred to the laying house, but the peak period material is not replaced in time.

3. Poor feed quality, such as too much mixed meal such as cottonseed meal and rapeseed meal, adulteration of feed raw materials, especially protein raw materials such as fish meal, soybean meal and amino acids, unreasonable feed formula, insufficient or improper proportion of restricted amino acids, low vitamin titer or even failure.

4. The climate of laying hens in summer is not good, the weather is hot, and the feed intake of laying hens is insufficient.

5. During the period of rearing or growing up, there have been diseases, especially transmission branches.

6. The chickens are in a state of sub-health or the interference of atypical Newcastle disease. Wang Baihui