Egg Duck breed-Liancheng White Duck
The main results are as follows: (1) the origin and distribution are also known as white duck. Because the central producing area is located in Liancheng County in the west of Fujian Province, it is distributed in Changting, Shanghang, Yong'an and Qingliu counties. This is a unique small white breed of Chinese sesame duck.
(2) the body is narrow and long, the head is small, the neck is slender, the forechest is shallow, the abdomen is sagging, the movement is flexible, foraging is strong and neurotic. Male and female ducks have white feathers, bluish black beak, shin, webbed gray-black or black-red.
(3) production performance ① laid 220,280 eggs in the first year, 250,280 eggs in the second year, and 230eggs in the third year. The average egg weight was 58g, and white shell eggs accounted for the majority. ② growth rate adult male duck weighs 1400-1500g, female duck 1300- 1400g. The first laying age of ③ female ducks is 120-130 days. The mating ratio of denominator ducks is 1: 20: 25. The fertilization rate of breeding eggs is more than 90%. The useful life of male duck is 1 year, and that of female duck is 3 years.
- Prev
Prevention and control of chicken mites
Chicken mite is a common in vitro parasite of chickens. Prevention and treatment: (1) thoroughly disinfect the chicken house. (2) soak the affected chicken's feet in warm soapy water, soften the crusts, remove them, apply 20% sulfur ointment or 10% insecticidal ointment or 2% carbonic acid ointment, and apply again at intervals of several days. With 0.1% trichlorfon solution, soak the feet of diseased chickens in the solution for 5 minutes, scrape off the crusts, and then wash the affected area with a small brush.
- Next
Pigs and cattle use streptomycin to prevent allergy
Some pigs and cattle will have an allergic reaction after using streptomycin, and if the rescue is not timely or unreasonable, it will cause death as well as penicillin allergy. Therefore, pigs and cattle using streptomycin should not be taken lightly, after the use of medicine should pay attention to careful observation, and prepare for first aid. Most of the allergies to streptomycin in pigs and cattle are acute. At the first medication, the allergic reaction occurred slightly slowly, showing symptoms in about 10 to 15 minutes, while in the second medication, the allergic reaction occurred faster, and the symptoms could be shown in about 5 minutes. The main symptom is that pigs and cattle tremble all over.
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