Breeding Technique of Old Courtyard Black Chicken

Male-female ratio of breeding chickens

The proportion of male and female spouses should be appropriate to ensure a high fertilization rate. If the proportion of spouses is not appropriate, too many hens can not be bred by Roosters; if there are too many Roosters, there is a competition, which will reduce the fertilization rate of breeding eggs. The most suitable proportion of black chicken in Wanyuan Jiuyuan is 1Ru 8Mel 10.

The utilization life of breeder chickens is generally the highest in the first egg-laying year after sexual maturity, the second egg-laying year is 15% lower than that in the first egg-laying year, and the third egg-laying year is further reduced by 15%. Therefore, in general breeding farms, the utilization time is relatively short, and the full-in-all-out system is often adopted, and the utilization life is 2 Mel for 4 years.

Mating method

1. Natural breeding

(1) breeding in large groups: a certain number of hens are matched with a certain number of cocks in proportion, so that every rooster and hen have the opportunity to combine and mate. This method of breeding often has a high fertilization rate, but the parents of chicks cannot be identified. It is generally only used for breeding farms, that is, breeding farms. You can use one rooster with 8 murals and 10 hens. The breeding rooster for more than three years has poor mating ability, so it is not suitable for breeding in large groups.

(2) cubicle breeding: a breeding cubicle, which generally holds 10 hens with a rooster. The hens and cocks are all numbered with foot numbers or shoulder numbers and equipped with self-closing egg boxes, and the breeding eggs should be marked with the number of breeding rooms and the number of hens' feet or shoulders, in order to know clearly the parents of the chicks obtained from this kind of breeding. Small breeding is often due to mating behavior and seclusion, the fertilization rate of breeding eggs is not as high as that of large groups.

(3) individual controlled breeding: in this method, a rooster is raised alone in a breeding cage and in a breeding room, and the hen is put in, and after mating, the hen is taken out. In order to ensure a good fertilization rate, each hen must be put in at least once a week. This breeding method can make full use of the excellent rooster, and the matching time needs to be controlled manually, so it takes a lot of manpower.

2. Artificial insemination: this method is to raise individual excellent Roosters in accordance with the characteristics of the breed and carry out artificial semen collection, and then dilute them into granulated frozen semen or thin tube frozen semen, or use fresh semen to inseminate each hen once a week, each rooster can supply 1000 to 2000 hens.

Egg laying law

The number of eggs laid depends on the length of the laying period and the laying rate during the laying period. In the laying year, the laying period of a chicken can be divided into three periods, namely, the initial laying period, the main laying period and the final laying period.

1. The initial laying period: about 1 or 2 weeks from the beginning of the first egg laying to the normal laying period, which is called the initial laying period. In this period, the egg laying is irregular and the egg laying is abnormal. There are generally the following situations: (1) the interval between laying eggs is long. (2) laying double yellow eggs. (3) laying soft shell eggs. (4) one abnormal egg, one normal egg, or both abnormal eggs are laid in one day.

2. The main laying period: the laying pattern of this period tends to be normal, and each hen has its own unique laying pattern, and the laying rate increases gradually, reaching the peak at the age of 32 ~ 34 weeks, and then decreases gradually. The main laying period is the longest laying period in the hen laying year, which plays an important role in egg production.

3, final delivery period: this period is quite short, although the pituitary gland can still produce gonadotropin, but the number of eggs decreased rapidly, until the end of unable to form eggs.

Disinfection of breeding eggs

After eggs are produced, they are often contaminated by feces and bedding grass, and dirty eggs are easily eliminated, while mild ones are easy to be ignored. according to research, the number of bacteria on the shell of newborn eggs is 100, 000, 300, 500, 500, 600 after 15 minutes, and up to 4, 000, 000 an hour later, especially in henhouses raised with bedding grass, breeding eggs are more likely to be contaminated by bacteria. The pollution of breeding eggs not only affects the hatching rate, but also seriously pollutes incubators and appliances and spreads various diseases.

There are many methods to disinfect eggs, and the fumigation method is more convenient and effective. According to the fumigation cabinet or fumigation room volume per cubic meter, add 30ml formaldehyde and 15g potassium permanganate to fumigate for 20ml for 30 minutes. Close the doors and windows strictly during fumigation, keep the indoor temperature at 25m / 270C and humidity at 75m / 80%. If the temperature and humidity are low, the disinfection effect is poor. Exhaust gas after fumigation. In order to save medicine, you can also use plastic sheet to close the egg rack and put the medicine plate under the shelf for fumigation.