When Xuefeng black-bone chicken is 6 months old, the average weight of cock is about 65438 0.5 kg, and the average weight of hen is about 65438 0.2 kg. The adult cock weighs about 3-4 kg, and the hen weighs about 2-3 kg. After the cock reaches the age of 6 months, the slaughter rate of semi-clean chamber is usually 82.4%, and the slaughter rate of full clean chamber is usually 72. 1%. After hens reach 6 months old, the slaughter rate of semi-clean chamber is usually 72.2%, and the slaughter rate of full clean chamber is usually 70.6%.

First, how heavy is Xuefeng Black Chicken?

At the age of 1.6 months, the average weight of male Xuefeng black-bone chicken is about 65438±0.5kg, and that of female is about 65438±0.2kg. In adulthood, males generally weigh about 3-4 kilograms, and females generally weigh about 2.5 kilograms to 3 kilograms.

2. Generally speaking, the semi-net slaughter rate of male Xuefeng black-bone chicken is 82.4% and the total net slaughter rate is 72. 1%, while that of female Xuefeng black-bone chicken is 72.2% and 70.6%.

3. The earliest crow opening date of male Xuefeng black-bone chicken is 106 day, and the average time is 152 day, while the earliest crow opening date of female Xuefeng black-bone chicken is 156-257 day. When the female reaches the age of 500 days, the average egg production is 94.58, and the average egg weight is about 46 grams.

4. The eggs laid by Xuefeng black-bone chicken are oval with light brown shell and a little white.

2. Introduction of Xuefeng Black-bone Chicken

1, origin

(1) This variety is native to Xuefeng Town, Tieshan Township, Xizhou Township, Shuping Township and other places around Xuefeng Mountain in hongjiang city, Huaihua City, Hunan Province.

(2) This variety was listed in the National Animal Genetic Resources List of 2065438+65438 in 00+ 15 10.

Step 2 show up

(1) Strong, of medium build, with feathers close to the body, medium head size, bright eyes, slightly longer body and crescent shape.

(2) The cock's crown is large and erect, with slender neck feathers, majestic posture, long and straight back, well-developed tail feathers, and the tail is fan-shaped and upturned in adulthood.

(3) The hen is slightly smaller, with delicate appearance, drooping abdomen and soft and elastic touch.

(4) Single crown, with 6-8 crown teeth, purple-red crown mustache and purple-green ear leaves (it will gradually degenerate in adulthood). There are four toes on the foot, the calf is thin, medium length, and there is no shin hair.

(5) This variety is characterized by black beak, black feet, black skin, black meat and ivory black. In natural environment, its coat color can be divided into three types: all white, all black and jute, in which the proportion of white is 365,438+0%, that of Kuroha is 20% and that of jute feather is 49%.