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Which breeds are best for meat-type ducks? Two recommended improved hybrid lines
1. Digao duck The Digao duck is a large hybrid-line meat duck developed by the Australian Digao company from introduced Pekin ducks. It was introduced into China in the 1980s. Parent-stock breeder ducks of this breed were raised at the Guangdong Overseas Chinese Farm. In 1987, the Nanhai County breeding duck farm in Guangdong Province introduced parent-stock Digao ducks, and the commercial ducks produced were well received. The Digao duck's appearance is similar to that of the Pekin duck. Ducklings have red-yellow feathers, which turn white after the juvenile plumage is molted. The head is large and slightly long, the neck is thick, the back is long and broad, the breast is wide, the body is slightly long, the breast muscles are full, and the tail is slightly raised, with 2-4 sex feathers
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Research progress on the mechanisms by which porcine circovirus type 2 infection causes immunosuppression
Circovirus infection is a newly discovered infectious disease. The disease has a relatively high infection rate in pigs and occurs widely throughout the world, having become one of the infectious diseases that seriously affect the development of the pig industry. Circovirus mainly attacks the pig immune system, interfering with and destroying the body's production and maintenance of immune antibodies against disease, resulting in reduced resistance and making pigs susceptible to secondary or concurrent other diseases. In recent years, scholars at home and abroad have conducted a great deal of research on the mechanisms by which porcine circovirus invades the immune system, and certain progress has been made in the virus replication mechanism, its effects on cytokines and lymph
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Which types of feed cannot be used alone to feed rabbits?
1. White radish leaves: White radish leaves contain very high levels of chlorophyll and a lot of water. If rabbits eat too much, they are prone to bloating, diarrhea, indigestion, and similar problems. Therefore, when feeding white radish leaves to rabbits, they should be mixed with other forage grasses, vegetable leaves, and so on. 2. Peanut vines: Peanut vines are rich in nutrients, and rabbits love to eat them, but because they contain a lot of crude fiber and water, excessive intake by rabbits can easily cause big belly disease, loose stools, indigestion, and similar problems, so they should not be fed alone in large amounts. In addition, when using peanut vines to feed rabbits, combining them with feeding the rabbits some onions, garlic heads
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