First, origin and distribution
The scientific name is éºé¦™éº, 疣鼻é¸æ –. Native to South America. China is known as Muscovy Duck or Duck. Foreign countries are called turkey ducks, wild ducks or brazilian ducks. The ducks are found in subtropical regions of South America and Central America, where the climate is warm and rainy. The ducks are forest birds that are not very watery and fly, and wild ducks have been found in Mexico, Brazil and Paraguay. Although it is not a native landrace in China, it has been introduced for more than 250 years. It is relatively common in central and southern Taiwan, Guangdong, Fujian, Jiangxi, Guangxi, Jiangsu, Anhui, Hunan, and Zhejiang.
Second, appearance characteristics
There is a clear difference between the body appearance of the duck duck and the domestic duck. The body shape is narrow in the front and rear, wide in the middle, and is in a spinning shape. When standing, the body is level with the ground. The cockroach is short and narrow, with red or black skin tumors on both sides of the base and head of the cockroach. It does not grow feathers. The growth of the skin tumor of the male duck is wider than that of the female duck. The head is large, the neck is slightly short, and there is a row of longitudinal feathers at the top of the head, which appears as a brush when stimulated. The chest is wide and flat, with short and thick legs (hard and sharp claws) and well-developed chest muscles. The wings are developed up to the tail and can fly for a short distance. The abdomen is less developed than the domestic duck, and its tail is long and narrow. There are mainly black and white feathers in our ducks. In addition, there are a few black and white flower buds. Black feathers have a dark greenish tinge, dark reds have dark spots, dermatomes are dark red, black and black, iridescent yellowish. White feathers and beaks are pink, and the tumors are bright red. The beaks and beaks are orange and iridescent. Flower plumage ducks have dark spots with bluish reds, red tumours, pimple, and black.
The ducklings on the head of the ducklings are low-pitched and have a buzzing sound. The female ducks often give out "buzzing" sounds when they are incubating. The duchess emit musk odors during the breeding season and are therefore called "mouse ducks".
Third, production performance
1. Egg production performance: Generally, the annual egg production is 80-120 pieces, and the high yield can reach 150-160 pieces, and the egg weight is 70-80 grams. Eggshell jade white, egg shape index 1.38 ~ 1.42.
2, growth speed and meat production performance: adult duck body weight 3500 to 4000 grams, female ducks 2000 to 2500 grams. Three-month-old ducks of ducklings weigh 2,700 to 3,000 grams, and ducks range from 1800 to 2,000 grams. The total net pupa rate of the drake is 76.3%, and that of the female duck is 77%. The ratio of the male and female duck breast thigh muscles to the total net carcass weight is 29.63% and the female duck is 29.74%. Muscle protein content of 33% to 34%, delicate meat, delicious taste. 10 to 12 weeks old ducklings were fed for 2 to 3 weeks. The average liver production was 300 to 353 g. The ducks were higher than the female ducks and the feed liver ratio was 30 to 32:1. An intergeneric hybrid duck, produced by crossing a male and a female duck, is called a muscovy duck or a duck. It has the characteristics of rapid growth, high beverage reward, good meat quality and strong resistance. In the south, especially Taiwan and Fujian, there are more. The muscovy duck, which was produced by crossing the male and female ducks, had an average body weight of 2160 grams at 60 days and grew faster than other hybrid combinations. The "Fanbeijin" hybrid duck, which was produced by the three-way crossbreeding of male ducks with male ducks and Beijing ducks and golden ducks, had an average weight of 2240 g at 3 months and the heterosis rate was 23.78%.
3. Reproductive performance: Female ducks are born 6 to 9 months of age. Male and female duck breeding ratio of 1:6 to 8, fertilization rate of 85% to 94%, incubation period of 35 days, fertilized egg hatching rate of 80% to 85%, female ducks have nesting, breeding male duck use life of 1 to 1.5 years . The hybrid ducks of the male and female ducks have a large difference in body weight between male and female ducks. They mostly use artificially assisted breeding and artificial insemination to breed muscovy ducks, and the fertilization rate is 60% to 80%.
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