1, yellow-green shell laying hens
Yellow-green-shell laying hens have two strains, Huangyu and Kuroha, both of which are from China local breeds, with single crown, yellow legs and red ears.
Third, the laying period of finished layers in Huang Qing is 155- 160 days, the laying capacity of hens is 1.25 kg, and that of roosters is 1.5 kg. The egg production at the age of 500 days is 180- 185, and the proportion of parents replacing chickens is about 97%.
2. Dongxiang green shell laying hens
Dongxiang Kuroha green shell laying hens are small in size, high in egg laying performance and strong in adaptability, with black feathers, black skin, ivory black, black meat, black viscera and black toes.
After five years and four generations of cultivation, this variety has the same appearance and high purity. Its paternal cock is often used to cross with laying hens to produce high-yield commercial hens instead of green-shell laying hens. The strains of green shell laying hens cultivated by most domestic manufacturers all contain the blood of this kind of chicken.
3. Sanyi green shell laying hens
Sanyi green fine laying hens were bred by Sanyi Poultry Breeding Co., Ltd. in Dongxihu District, Wuhan City. The latest mating combination is to use Dongxiang Kuroha green shell strong chicken cock as the male parent and imported powder fine laying hens as the female parent.
Sanyilong 150- 155 days old, 1.25 kg old. The average egg weight at 300 days old is 50-52g, and the egg production at 500 days old is 2 10. The proportion of green shell eggs is 85%-90%, and the weight of adult hens is 65438+.
4. Poplar green shell laying hens
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The laying age of poplar green shell layers is 140 days (the laying rate is 5%) and the laying rate is 162 days; The birth weight is 1.0- 1. 1 kg, and 230 500-day-old hens lay eggs in the house, with an average egg weight of 50g. The color of eggshells is basically the same, and the egg rate of big green shells is 70%-75%.
5, Zhao Baoqing shell laying hens
This breed of chicken is similar to Jiangxi Dongxiang Lvwan Egg Chicken. Hens have black feathers, black skin, black meat, black bones and a black crown.
The laying age of Zhao Baoqing layers is late, ranging from165 to170 days, and the laying weight is 1.05 kg. There are 135 and 150 eggs at the age of 500 days, with an average egg weight of 42-43 grams, and the proportion of green-shelled eggs in the commercial group is 80%.
6. Chang green shell laying hens
Originated in Nanchang County, Jiangxi Province. This breed of chicken is short in stature, compact in feathers and messy in color, which can be roughly divided into four types: white feather type, Kuroha type (except the red feather on the neck, all the other feathers are black), hemp feather type and yellow feather type (with yellow skin and yellow feet at the same time).
Chang-line green-shell layers started laying late, with an average of 65,438 0.82 days, with an average egg production of 65,438 0.25 kg, an average egg production of 38.8 grams, 89.4 eggs at 500 days old, an average egg production of 565,438 0.3 grams, and an egg production rate of about 65,438 00%.