Laying rate

There are two ways to calculate the laying rate, one is the laying rate of hen feeding day (also known as chicken daily laying rate), the other is the laying rate of the number of hens in the house (also known as chicken house laying rate). For example, on a certain day, 1000 hens are stored in the circle and 600 eggs are laid. The daily laying rate is 60%. It is more complicated to calculate egg production and egg rate for a year or a month. If you raise a chicken, how many eggs are laid in the first year after birth that's the chicken's annual egg production. Raising a group of chickens in the year of laying eggs, not one chicken died or eliminated, as long as the number of chickens to remove the total annual egg production can be calculated, the average annual egg production of each chicken.

Measures to improve egg production

Segmented breeding

According to the age and laying level of laying hens, the laying period of laying hens can be divided into different stages and different management methods can improve laying rate of laying hens and achieve twice the result with half the effort. Two - paragraph method or three - paragraph method is generally adopted.

The limit of the two-stage method is 50 weeks of age, before 50 weeks of age, the chicken is still developing and is in the peak stage of laying eggs, and the protein level of feed is controlled at 16% to 17%. After 50 weeks of age, the growth and development of chicken body were almost complete, egg production gradually decreased, and protein level was controlled at 14%-15%.

According to the age of the three-stage method, the first stage was from 20 weeks of age to 42 weeks of age, the second stage was from 43 weeks of age to 62 weeks of age, and the third stage was after 63 weeks of age. The protein level in the diet gradually decreased, which were 18%, 16.5%-17% and 15%-16%, respectively. There is also a transition time of 1~2 weeks for each section of feed. Using this method, the peak of egg production appeared early, rose quickly, the peak duration was long, and the egg production was large.

Limit breeding

Restricted feeding during laying period can improve feed conversion rate, reduce cost, save feed, and can properly control body weight, avoid excessive feed intake, excess nutrition caused by fat hens, prevent fatty liver, improve egg production of chickens. In the egg-laying stage, the "group control method" is generally adopted, that is, select a certain number of chickens in the group, let them freely feed, and accurately record the daily feed intake. Based on the average feed intake of one week, the feeding limit for the next week was calculated according to the percentage of the required feeding limit.

Adjust the feeding

On the basis of feeding standards, keep the feed formula relatively stable, no matter in any case, feed formula can not be moved, feed raw materials, nutrients can not change too much, even if the same variety of raw materials, different production areas also have an impact on production performance. It can be fine-tuned as far as possible, so that the palatability of the chicken has a gradual adaptation process, otherwise it will affect the feed intake of the chicken and cause the decrease of egg production. Grasp the timing of adjustment, according to the egg production of chickens, egg quality, health, feeding conditions and environmental changes, timely adjustment.

Laying rate of the highest several kinds of chicken in the laying rate is relatively very high. We all bought food, soil eggs are all know the market price is average the price of eggs is at least one or two times more expensive, so reed catkins in Turkey, chicken eggs to make a great contribution, but the rate of the main or and feeding method, we can adjust the chickens, increase nutrition, and by increasing illumination method to increase production rate and growth period of egg production, Generally 72 weeks of age can produce about 255 eggs, so it is quite good.

White shell layers

White leghorn after hybrid varieties of a new type of laying hens, mainly white leghorn rate is high, so the white shell eggs are one of the cause of the high rate of which is due to genetic, followed by white shell layers is the study of the relevant state departments dedicated to this aspect of egg cultivated varieties, Therefore, this is one of the reasons for its high laying rate. Usually, a 72-week-old hen can lay about 288 eggs, so it is a very successful variety of laying hens.

White leghorn

From Italy, mainly because its survival rate is relatively high, relatively easy to feed, followed by its egg production rate is relatively high, although the body is small, but there are still many people willing to breed, so the general people are to take it as a main breed of eggs to raise. Its advantage is that the growing period is relatively short, and the feed consumption is very little, and it can produce eggs in about 140 days, the average annual egg production is as high as 300 or so, so it is very suitable for breeding a kind of laying hens.

Main physiological factors affecting laying rate of laying poultry

Gonadotropin levels

According to the domestic and foreign reports, it is difficult to apply nutritional regulation technology to improve egg production performance greatly. Egg follicle development, ovulation and egg formation are related to reproductive hormones, and the growth and development of egg follicles are mainly controlled by pituitary gonadotropins FSH and LH. Follicular atresia occurred quickly after pituitary excision.

Follicular atresia is an important factor causing the decrease of laying rate

After egg sexual maturity, the ovary gathers a large number of small egg cells. Laying hens have at least 2,000 visible eggs and tens of thousands of large and small eggs that can be seen microscopically, but only a few of them (a few hundred) will eventually form eggs and pass out of the body. The vast majority of follicles will become closed and degenerate in competition. It is speculated that the changes of estrogen, androgen and ovarian aromatase activities are most closely related to follicular atresia.