Common green-shell laying hens include Zhaobao green-shell laying hens, Sanyi green-shell laying hens, Sanhuang green-shell laying hens, Dongxiang Black Feather green-shell laying hens, Xinyang green-shell laying hens, Changxi green-shell laying hens, etc. 1. Zhaobao green shell laying hens: The age at which they start laying is 165-170 days, the egg production at 500 days is 135-150, and the average egg weight is 42-43g. 2. Sanyi green-shell laying hens: The age at which they start laying is 150-155 days, the egg production at 500 days of age is 210, and the average egg weight is 50-52g.
1. Zhaobao Green Shell Laying Hens
1. Breeding unit
Zhaobao Ecological Farm Co., Ltd., Hulei Town, Yongding County, Fujian Province.
2. Appearance and production performance
(1) Appearance: black feathers, black skin, black flesh, black bones, black crown.
(2) Production performance: The age at the start of lay is relatively late, about 165-170 days, the weight at the start of lay is about 1.05kg, the egg production at 500 days of age is 135-150, the average egg production per egg is 135-150. The egg weight is 42-43g, and the proportion of green shell eggs in commercial chicken flocks is about 80-85%.
2. Sanyi Green Shell Laying Hens
1. Breeding Unit
Sanyi Poultry Breeding Co., Ltd., Donghu District, Wuhan City company.
2. Appearance and production performance
(1) Appearance: single crown, red ear leaves, green legs, green beak, and yellow skin.
(2) Production performance: The age at the start of production is about 150-155 days, the weight at the start of production is about 1.25kg, the adult weight is about 1.5kg, the egg production at 500 days of age is 210, on average Each egg weighs 50-52g, and the ratio of green shell eggs is about 85-90%.
3. Sanhuang green-shell laying hens
1. Breeding unit
Jiangsu Provincial Poultry Research Institute.
2. Appearance and production performance
(1) Appearance: single crown, yellow beak, yellow legs, red ear leaves.
(2) Production performance: The age at the start of labor is about 155-160 days, the weight of hens at the beginning of labor is 1.25kg, the weight of roosters is 1.5kg, the weight of adult hens is 1.5-1.6kg, and the weight of roosters is 1.5-1.6kg. 1.85-1.9kg, the egg production at 500 days is 180-185, the average egg weight is 45g, the green-shell egg ratio of the parent flock is about 97%, and the green-shell egg ratio of the large commercial flock is 93-95 %about.
4. Dongxiang black-feathered and green-shelled laying hens
1. Breeding unit
Jiangxi Academy of Agricultural Sciences, Jiangxi Province Institute of Animal Husbandry, Academy of Agricultural Sciences.
2. Appearance and production performance
(1) Appearance: black feathers, black skin, black bones, black meat, black viscera, black beak and toes, single hen The crown is upright, with 5-6 crown teeth. The ear leaves are light green, and the feathers are flaky and relatively compact. The rooster's single crown is upright, dark purple, with 7-8 crown teeth. The ear leaves are purple-red, and the neck and tail feathers are green. Smooth and upturned.
(2) Production performance: The adult weight of hens is about 1.1-1.4kg, the adult weight of roosters is about 1.4-1.6kg, and the ratio of green-shell eggs in large commercial flocks is about 80%.
5. Xinyang Green Shell Laying Hens
1. Breeding unit
Shanghai Xinyang Poultry Breeding Center.
2. Appearance and production performance
(1) Appearance: The feathers of commercial hens are white, but most of them have black spots. They have a single crown, and the crown and ear leaves are mostly red. , a few are black, some hens (about 60%) have green feet and green beaks, and the rest have yellow feet and yellow beaks.
(2) Production performance: It takes 140 days for the egg production rate to reach 5%, and 162 days for the egg production rate to reach 50%. The starting weight is about 1-1.1kg, and the egg production is 500 days old. The amount is about 230, the average weight of each egg is 50g, and the ratio of green shell eggs in large flocks of chickens is about 70-75%.
6. Chang lineage green-shell laying hens
1. Breeding unit
Originated in Nanchang County, Jiangxi Province.
2. Appearance and production performance
(1) Appearance: short body, compact feathers, can be roughly divided into 4 types: white feather type, black feather type, hemp feather type, yellow feather type Feather type, small head, single crest, red color, short beak, slightly curved, yellow color, some chickens have shin feathers.
(2) Production performance: The starting weight is about 1.25kg, the weight of adult roosters is about 1.3-1.45kg, and the weight of adult hens is about 1.05-1.45kg. The laying age is 182 days, the average egg weight at the beginning of laying is 38.8g, the number of eggs laid at 500 days of age is 89.4, and the average egg weight is 51.3g.