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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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Which improved varieties of processing yellow peach have been promoted in recent years
In recent years, the improved processing yellow peach varieties that have been promoted mainly include Golden Queen, Zhenghuang 2, Jinxu, Jintong 5, 6, 7, and 9, Mingxing, Dixon, and others. (1) Golden Queen: bred in New Zealand, the main canning export variety of Australia. The fruit ripens in late September. The average single fruit weight is 125 grams, uniform in size, suitable for processing. Its sugar content is higher than other canning peaches, and the canned product is golden and bright. Under cold storage conditions it can be stored until December, and it is an ideal dual-purpose variety for fresh eating and processing. High and stable yield. (2) Zhenghuang 2
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Which insecticide is effective for controlling the rice stem maggot?
The rice stem maggot has broken out and caused disasters in most rice-growing areas in China in recent years, making it a serious pest. At present, an insecticide for controlling pests such as the rice stem maggot has been successfully invented. The purpose of this invention is to provide a highly effective and low-toxicity insecticide specifically for controlling the rice stem maggot pest. The insecticide of this invention is prepared by mixing two agents, fipronil and imidacloprid, in a weight ratio of (1:0.1) to (0.1:1), and can be made into various formulations such as seed coating agents, seed dressing agents, suspension concentrates, powders, and emulsifiable concentrates. The advantages are: its insecticidal effect on the rice stem maggot
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How to treat pig eczema, which occurs frequently in summer
Eczema is a skin disease that occurs frequently in pigs in summer. The main symptoms of acute and chronic eczema are red patches, papules and itching on the skin, and a few cases are accompanied by pustules, oozing, erosion and scabbing. It is especially harmful to suckling piglets. According to practical experience in production, treatment with mirabilite has a special effect. Method: according to the size of the pig and the area of the affected part, take 50-200 grams of mirabilite respectively, add 200-500 milliliters of cooled boiled water, and after it dissolves, apply it to the affected part, 4-5 times a day, or use a clean towel to dip the liquid and wet the affected area,
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With so many chicken breeds, which one is best to raise?
Chicken breeds are divided into standard breeds, commercial breeds and local breeds. What people generally raise now are commercial breeds. Standard breeds such as White Leghorn and Rhode Island Red are used only as breeding material and are no longer referred to in commercial breeding. Commercial chicken breeds are products selected and named by breeding companies, such as Lohmann Brown and Hy-Line White. Modern commercial breeds are characterized by breed specialization, high production performance, and the fact that commercial chickens are mostly hybrids. Modern commercial breeds mainly derive from a few standard breeds, such as White Leghorn, Rhode Island Red and White Plymouth Rock, but the
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Which type of inoculation tent works well for edible mushroom inoculation
1. Construction. The mosquito-net-style plastic inoculation tent is made from 3 m wide, 0.5 mm thick agricultural plastic film, and the specifications of the inoculation tent are 3 m long, 3 m wide and 3 m high. First cut a 13.5 m length of plastic film as the 3 m square enclosure wall of the inoculation tent, and take another 3 m length of film as the tent roof. Then use a plastic sealing machine or electric soldering iron to seal the two films along the edges, leave an overlapping joint line on one side of the tent as the door of the inoculation tent, and at the same time tie a rope at each of the 4 top corners of the inoculation tent for easy hanging. 2. Disinfection. Before use, first clean the inoculation
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Which edible mushroom varieties are suitable for cultivation in autumn and winter?
In autumn and winter, as mid-to-late rice, corn, cotton and sugarcane are harvested, not only is space and labor freed up for developing edible mushrooms, but waste materials such as straw, cottonseed hulls, bagasse, corn cobs and mixed wood shavings are also good raw materials for cultivating edible mushrooms. Therefore, autumn and winter are among the best periods for developing edible mushrooms. The button mushroom, commonly known as the mushroom, can be cultivated in open fields using mid-to-late rice paddies. Wheat straw, corn stalks, rice straw and thatch leaves can be used as raw materials; from composting to fruiting takes about 50 days.
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In which regions are Korean pine (Pinus koraiensis) tree species mainly distributed?
The distribution area of the Korean pine (Pinus koraiensis) tree species is: Korean pine is produced in the mountainous areas of Heilongjiang, Jilin and Liaoning in China at altitudes of 300 to 1800 m. Its natural distribution roughly coincides with the range extending from the Changbai Mountains and the Greater Khingan Mountains. It has been introduced and cultivated in Beijing and in such places in Shandong as Mount Tai, Mount Lao and Mount Kunlun. Korean pine has a fairly wide tolerance for light conditions, and as the tree age increases, its light requirement gradually rises. It most prefers deep, fertile mountain dark brown forest soil with good permeability. Korean pine is a shallow-rooted tree species, its taproot is not well developed, and its lateral roots spread very widely horizontally, which helps it absorb soil nutrients.
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Which specific site should be chosen for injecting snake food
We advocate that all incoming food, besides the necessary disinfection, must also be injected with some disease-preventing and deworming drugs, so as to fundamentally keep snakes from getting sick and reduce illness. Injecting these live small animals is quite particular; it is best to use an adjustable continuous syringe (sold in veterinary drug stores). With ordinary syringes, small doses are hard to adjust, and sometimes you may "kill" them. If the snakes you keep do not eat dead food, then it is wasted. Through practical operation we found that for chicks the injection site should be above the chicken neck for subcutaneous injection; for toads inject into the muscular inner thigh
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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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