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Dongxiang Black Feather Green Shell Laying Hen

 

Dongxiang Black Feather Green Shell Laying Hen

This was cultivated by the Institute of Agricultural Sciences of Dongxiang County, Jiangxi Province and the Animal Husbandry Institute of Jiangxi Academy of Agricultural Sciences. Small in size, high egg-laying performance, strong adaptability, black feathers, black skin, black bones, black meat, black internal organs, black beaks and toes. The hen has compact feathers, an erect single crown, 5-6 crown teeth, big eyes, most of the ears and leaves are light green, the wattles are deep and thin, the feathers are flaky, the shin is thin and short, and the adult weight is 1.1 -1.4 kg.

 The rooster is male and vigorous, with a strong call, an erect single crown, dark purple, 7-8 crown teeth, purple-red ears and leaves, green and upturned neck feathers and tail feathers, weight 1.4-1.6 kg, body shape is "V" type. For commercial generations raised in large groups, the green shell egg ratio is about 80%. 

Dongxiang Black Feather Green Shell Laying Hen


After 5 years and 4 generations of breeding, the breed has the same body appearance and high purity. Its male rooster is often used to crossbreed with egg-type hens to produce high-yielding green-shell commercial hens, which are cultivated by most farmers in the location. 

The lineages of green-shelled hens contain the blood of the chickens. However, the breed has strong brooding (about 15%), so the egg production rate is low.

 

Zhaobao Green Shell Laying Hen

It was bred by Minxi Zhaobao Rare Poultry Development Company, Lei Town, Yongding County, Fujian Province. 

The blood origin of this chicken breed is similar to that of Jiangxi Dongxiang green-shelled laying hens. 

The hen has black feathers, black skin, black meat, black bones, and black crown. 

The starting age is 165-170 days, the starting weight is 1.05 kg, the 500-day-old egg lays 135-150 eggs, the average egg weight is 42-43 grams, and the green-shell egg ratio of commercial flocks is 80. %-85%.

 

Pullorum in green-shelled hens


Prevention and control of pullorum in green-shelled hens

Pullorum is a common infectious disease caused by Salmonella pullorum, and chicks within 2 weeks of age die the most.

 

(1) Pathogen in pullorum in green-shelled hens

Salmonella pullorum is not resistant to chemical disinfectants, and general disinfectants such as 5% carbolic acid and 0.2% mercury chloride can be killed in 5 minutes.

 

It is mainly prevalent in 2-3 week old chicks, and the incidence of reserve chickens and adult chickens is less. Gastrointestinal infection is the main route of infection.

 

(2) Symptoms of pullorum in green-shelled hens

The sick chicks have piles, drooping wings, sluggishness, no appetite, screaming when defecation, a layer of white feces is often attached near the anus, prolapse of the anus, and often stretches and shrinks. Adult chickens generally do not show obvious clinical symptoms after infection.

 

(3) Prevention and treatment of pullorum in green-shelled hens

i. Regular quarantine, hatching eggs are fumigated and disinfected with formalin, and they are introduced from chicken farms without pullorum.

 

2. 50 grams of Shigella kexing is 35 to 40 kilograms of medicinal mixture. Mix sulfamethazine and sulfamethazine in the feed at a dose of 0.2% to 0.4% for 3 consecutive days, and then halve the dose for 1 week. 

Oxytetracycline, tetracycline and chlortetracycline are mixed into the feed at a dose of 0.02% to 0.06% and can be used continuously for several weeks.



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