Characteristics of powder shell laying hens
Powder shell layer is a hybrid chicken produced by orthogonal or reverse hybridization between Luodaohong variety and Bailaihang variety. Its shell color is between brown and white, and it is light brown. Strictly speaking, it belongs to brown-shelled eggs, and it has become a custom for people in China to call it pink-shelled eggs. Its feather color is white, with mottled feather spots such as yellow, black and gray, which is different from brown shell laying hens. So it is divided into powder shell laying hens.
What kinds of pink shell laying hens are there?
1, Roman pink shell laying hens
Roman pink layer is a supporting line of pink shell layer cultivated by German Roman Poultry Breeding Co., Ltd., which was introduced in China in 1983, and then gradually popularized throughout the country. The survival rate of parental breeder 1- 18 weeks is 96%-98%; The first laying age was 147- 154 days, and the peak laying rate was 89%-92%. 72-week-old hens lay 266-276 eggs, 238-250 qualified eggs and 90- 100 female chicks; The survival rate of 19-72 weeks is 94%-96%. The weight of commercial chickens at 20 weeks old 1400- 1500g, 1-20 weeks old consumes 7.3-7.8kg, and the survival rate is 97%-98%. The first laying age was 140- 150 days, and the peak laying rate was 92%-95%. 72-week-old hens lay 300-3 10, with total egg weight of 19.0-20.0 kg, egg weight of 63.0-64.0 g, and egg weight of 1800-2000 g; The daily feed intake of 2 1-72 weeks old was1118g/individual, and the feed/egg ratio was (2. 1-2.2): 1, and the survival rate was. The eggshell is light yellow.
2. Bai Jing 939
It is a complete line of powder-shell laying hens selected by researchers of Beijing Poultry Breeding Company from 1993- 1994. The male parent is a brown-shell laying hen and the female parent is a white-shell egg graft. Cocoa feather speed of hybrid commercial chicken varies from different _ male. The results of production performance measurement showed that the fertilization rate was 95% at 20 weeks old, the survival rate at laying period was 92%, the daily egg production was 302 at 20 weeks old 1.5 1 kg, and at 2 1-72 weeks old, with an average egg weight of 62g and a total egg weight of18.7kg..
3. Star Miscellaneous 444
It is a successful three-line hybrid chicken of Cheval Company in Canada. According to Cheval's data, it lays 265-280 eggs at the age of 72 weeks, with an average egg weight of 6 1-63 grams and a consumption of 2.45-2.7 kilograms per kilogram of eggs. According to the results of random sampling in Germany in 1988 1989, its production performance is as follows: 500-day-old hens lay 276-279 eggs, with an average egg weight of 63.2-64.6g and a total egg weight of17.66-17.8kg per kg.
4. Farm No.2
It is a successful two-line hybrid chicken of Beijing Agricultural University. The male line is a strain of Berliner, and the female line is a synthetic line of reddish-brown feathers. Commercial chicks can be separated from each other by feathers. The results of random sampling determination of maternal and infant indicators of production performance are as follows: the success rate of 0-20 weeks old is 90.2%; Starting weight1.49 kg; 16 1 day reached 50% egg laying rate, laying 255 eggs at 72 weeks old.1egg, with an average egg weight of 59.8g, total egg weight 15.25kg, and consumption of 2.07kg per kilogram of eggs. At the end of laying period, the survival rate was 87.
The pilot test results of 405 1 chicken showed that 250.9 eggs were laid at 72 weeks old. The average egg weight is 58.2g, the total egg weight is14.6kg, and the material used is 2.7kg per kg. ..
5.B-4 chicken
Xingza 444 is a two-line hybrid chicken bred by Animal Husbandry Institute of China Academy of Agricultural Sciences. The paternal line is Luo Daohong, and the maternal line is Bai Laihang. The feather color of hybrid chicken is gray with brown or black feather spots, and its production performance is determined by random sampling: the mating rate of 0-20 weeks old is 93.4%; Starting weight1.78 kg; The laying rate of 165 days old reached 50%, and 254.3 eggs were laid at 72 weeks old, with an average egg weight of 59.6 grams, a total egg weight of 15. 16 kg, and a feed-egg ratio of 2.75: 1. The survival rate at the end of egg laying was 82.9%. According to the pilot test results of 55,465,438+0b-4 chickens, among the 50% chickens that lay eggs at the age of 65,438+065, the peak of laying eggs at the age of 65,438+057 accounts for more than 80%, and the laying eggs at the age of 72 weeks are 265. 1, with an average egg weight of 59.4g and a total egg weight of 65,000. The weight at the end of egg laying is 1.86 kg. Practice in recent years has proved that B-4 chicken is famous for its strong disease resistance, good adaptability and high yield, and its feeding capacity is increasing and its coverage is increasing.
6. A new B-4 chicken.
It was bred by the Institute of Animal Husbandry of China Academy of Agricultural Sciences on the basis of the original B-4 chicken for several years. 1993 established complete strains of pure fast feather and pure slow feather, and achieved the goal of self-sex of commercial chickens, including self-sex of feather speed and partial feather color. This is the outstanding feature of the new B-4 chicken, and the self-sex accuracy rate is over 98%.
According to the determination results, the success rate of commercial chickens aged 0-20 weeks was 96%, and the age of 155 days reached 50%. At the age of 25 weeks, more than 80% of the eggs are laid, and the laying rate is 96.3%. 72 weeks old, feeding 276.7 eggs a day, the average egg laying rate was 76%, the average egg weight was 60.7 grams, and the total egg weight was 16.8. The new B-4 chicken replaced the original B-4 chicken.
7. Osek (concubine Zibie) laying hens
Yuji Zibie layer is a new breed bred by Zhangjiakou Higher Agricultural College and Qinhuangdao Breeding Farm in Hebei Province, and passed the technical appraisal in June 2004 1993. This chicken breed is divided into concubine 1 which lays white eggs and concubine 2 which lays pink eggs. In recent years, after the establishment of Qinhuangdao Osek Poultry Research Center, it was renamed Osek White and Osek Powder Laying Hens. These two kinds of commercial laying hens can be self-pollinated, with strong adaptability, high laying performance and high feed conversion rate, and have become important laying hens in Hebei Province. According to the inspection report of Qinhuangdao breeder farm 1995, the mating rate of Yuji 1 20 weeks old is 90.2%, the survival rate of laying period is 90.9%, the laying age is 166 days, the laying weight is 1.43 kg, and the average egg weight at 43 weeks old is 57.8 grams. Yuji No.2 has a success rate of 97.2% at the age of 20 weeks, a survival rate of 92.4% at the laying period, a daily age of 168 days, a birth weight of 1.69 kg, an average egg weight of 6 1.7 g at the age of 43 weeks, a peak egg laying rate of 90.8% and a total egg weight of1at the age of 43 weeks.