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How do you carry out selection and mating of geese? Scientific methods teach you to choose good breeding geese
Selection of breeding geese: Methods for retaining breeding stock Selection of breeding geese should be carried out in the following two periods: the first selection is carried out when the breeding geese are 70-80 days old. Those that grow and develop quickly, have a large body weight, are in good health, and whose plumage color and other appearance characteristics meet the requirements of the breed are retained as breeding geese, and the number retained should be 10%-20% more than the planned number of breeding geese. The second selection is carried out when the breeding geese are 180-200 days old. At this time, the breeding goose flock has developed sufficiently, and the secondary sexual characteristics of the geese are obvious. Breeding ganders are required to have a large head and thick neck, a robust physique, well-proportioned development of all body parts, wings held close to the body, and a prominent frontal caruncle
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How to strengthen the management of fish in warm sheds? Detailed explanation of breeding key points
Strengthening the management of fish in warm sheds. At present, the main species cultured in warm sheds are tilapia, catfish, and freshwater white pomfret fry and adult fish. For tilapia culture, attention should be paid to maintaining water temperature and managing water quality to prevent frostbite on the head from affecting sales. For routine water disinfection, chlorine dioxide can be used, and high-protein complete formula pellet feed should be selected as much as possible. For catfish culture, chlorine dioxide can also be used for routine water disinfection. Special attention should be paid to preventing the occurrence of saprolegniasis. When routinely feeding animal by-products such as chicken intestines, care should be taken to keep the bait fresh. Culturing freshwater white pomfret and culturing
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Successful breeding of new silkworm varieties in Hubei Province
The newly bred silkworm varieties "Ecan 3" and "Ecan 4" were recently awarded the first prize of the Hubei Provincial Science and Technology Progress Award. The robust autumn-use variety Ecan 3, compared with the main autumn-use variety currently promoted in Hubei Province, Huanghe x Zhaoxia: strong resistance, with a unified larval-pupal survival rate of over 92%; high yield, with cocoon production of 33.95 kg per sheet, an increase of 9.94%; excellent silk quality, with a cocoon shell rate of 24.83%, a single cocoon silk length of 1150 m, a reelable silk length of 941 m, and a silk yield of 17.88%, increases of 8-1
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Review of Research Progress on Pig Disease-Resistance Breeding Technology
High-yield objectives usually lead to reduced pig resistance. At the same time, pig farm diseases, especially viral infectious diseases, severely threaten pig health. Although vaccination has played an important preventive and control role, it has not been able to completely control and eliminate the prevalence of infectious diseases. In the long run, adopting genetic methods to improve pigs' resistance to pathogens at the genetic level, and carrying out disease-resistance breeding, has a fundamental effect. In the 1930s, some scholars reported that different chicken breeds differed in susceptibility to Marek's disease, and in the subsequent
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Breeding and High-Yield Cultivation Techniques of the Rice Variety Lindao 12
1 Breeding history: In 1999, the Linyi City Rice Research Institute used radiation mutation breeding, treating 500 g of Yujing 6 seeds with 60Co alpha-rays at a dose of 40,000 roentgens, and planted the Mo generation that year; the population showed high sterility, and all seeds (M1 generation) were harvested in autumn; in the winter of the same year, winter multiplication in the south was carried out to add a generation, planting the M1 generation, and the population showed high segregation, and all M2 generation seeds were harvested. In 2000, the quartering bulk breeding method was used, planting the M2 generation, and in autumn superior plants were selected from the mutant population.
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Detailed Explanation of Neon Tetra Breeding Methods and Techniques
The parent fish reach sexual maturity at 10 months of age. Distinguishing males from females is relatively difficult. Generally, males have more slender bodies, while females are plumper and thicker. Cover the bottom of a 30cmX25cmX25cm fish tank with fine hair grass. Keep the water temperature at 5-26°C and the water pH at 5.6-6.5, and the adjustment should be made slowly so the parent fish have an adaptation process (or use extremely soft double-distilled water, adjust the pH, and aerate it for later use). Place a pair of parent fish in the tank in the evening; the female usually hatches fry at dawn the next day, and after 4-5
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Detailed Explanation of Scientific Breeding and Cultivation Techniques for the Fragrant Rose Acacia
The fragrant rose acacia (Robinia pseudoacacia 'Idaho') is a deciduous tree in the Fabaceae (Papilionaceae) family, native to Spain. The tree reaches 10-12 cm in height and blooms twice a year, in May and July. Its flowers are brightly colored, abundant and large, hanging in long cascading clusters, with high ornamental value and a long flowering period. It is a prized choice for landscaping in cities, along roads, and in scenic areas, and is the top recommended fast-growing ornamental tree for landscaping. The fragrant rose acacia is a rare fragrant landscaping tree species. It is cold-tolerant, drought-tolerant, tolerant of poor soils and saline-alkaline conditions, with a well-developed root system, rapid growth, and wide adaptability. It can be widely used for urban and rural beautification, greening of barren hills, and more, and holds great
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How to raise blue foxes? Master these four breeding techniques
This year, in Pulandian City, Liaoning Province, 10 specialized blue fox farming households averaged more than 8 cubs per litter, more than 40% higher than the local female foxes' litter size. In the survey, it was learned that skilled fox farmer Cai Yu achieved high results in mating rate, pregnancy rate, whelping rate, survival rate and economic benefit, with a cumulative average of 10.4 cubs per litter over 3 years. Because the blue foxes he raised were pure in breed and excellent in quality, his breeding foxes and fur sold well. His main experience consists of 4 techniques: introducing fine breeds. The breeding male and female foxes raised by Cai Yu were all purchased from the fur animal experimental breeding base of the Special Products Research Institute of the Chinese Academy of Agricultural Sciences in Zuojia, Jilin
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Introduction to Breeding Methods and Technical Key Points for Velvet Deer
Physiological Characteristics of Velvet Deer: Sexual Maturity and Suitable Age for First Mating. Sexual maturity is reproductive physiological maturity, at which point deer can produce mature sperm and eggs and exhibit sexual behavior. The sexual maturity of velvet deer is related to factors such as breed, type, sex, genetic status, nutritional conditions and individual development. Sika deer reach it earlier than red deer, and females earlier than males. Within the same breed, deer with good nutritional status and rapid individual development reach sexual maturity earlier. General sexual maturity period: female sika deer at about 16 months of age; well-developed deer reach sexual maturity at 7 months of age; male deer at about 20
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Detailed Explanation of Key Technical Points for Weaning and Initial Breeding Selection of Foxes, Raccoon Dogs and Minks
1 Key Points of Weaning Before weaning the cubs, first check the cages and boxes to be used once, repair any damage, and then disinfect them all for later use. Then clean and disinfect the required food trays and water boxes, to be used after the cubs are weaned. Fox cubs are generally weaned at 35-60 days of age, raccoon dog cubs generally at 45-60 days of age, and mink cubs generally at 40-45 days of age. Cubs must not be weaned too early; weaning too early weakens their independent living ability, affects their growth and development, and easily causes disease or even death;
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