40results about How to "Long fast" patented technology

The invention belongs to the technical field of poultry breeding, and relates to a method for cultivating a special male parent strain mainly used as yellow-feather broilers, which comprises the following steps of: 1, hybridizing to generate a F1 generation by taking a broiler chicken from another country as a male parent and a yellow-feather broiler with characteristics of jute feathers and yellow shins as a female parent, selecting and remaining F1-generation cocks and performing feeding and management according to a feeding and management method of breeding hens; 2, mating a F1-generation cock serving as the male parent with the female parent in the step 1 to generate a F2 generation, grouping respectively according to feather colors in the F2 generation, performing test cross, and performing the feeding and management according to the feeding and management method of the breeding hens; 3, crossing male and female individuals of each group obtained in the step 2 athwart and propagating, and purifying and fixing beneficial characters according to a family and individual selection method; and 4, breeding by four or more than four beneficial characters for generations to form a new broiler strain containing the bloodlines of the broiler chickens from other countries. By the method, the growth speed of the yellow-feather broilers in China is improved substantially, and the feedconversion rate is reduced.

The invention discloses an additive of a Micropterus salmoides adult fish compound feed. The additive comprises the following air-dried substances in parts by weight: 5-7 parts of poria cocos, 4-6 parts of medlar, 3-5 parts of black sesames, 8-12 parts of fructus psoraleae, 1-2 parts of ferrous sulfate, 4-6 parts of copper sulfate, 2-4 parts of medical stone and 60-70 parts of rice hull powder. By addition of traditional herbal medicines such as the poria cocos, the medlar, the black sesames and the fructus psoraleae which are scientifically combined with mineral salts, skeletal development of Micropterus salmoides adult fishes can be promoted, the growth speed can be remarkably increased, and the cultured Micropterus salmoides adult fishes are elongated.

The invention discloses a method for breeding pure yellow catfish all-female fish and super-male fish and producing all-male fish in large scale. The method comprises the following steps: screening wild original yellow catfish with excellent characters from the Changjiang river system, and using an artificial gynogenesis technology and a hormonal reverse method to establish a pure yellow catfish all-female fish germplasm bank; then using pure yellow catfish as a foundation, applying a GMT technology and a transsexual and test-crossing method to breed pure yellow catfish all-female fish and super-male fish, and establishing a super-male yellow catfish germplasm bank; combining super-male yellow catfish with pure all-female yellow catfish, establishing a full-male yellow catfish breeding system, and producing pure full-male yellow catfish fries in a large scale for breeding commercial fish. The method effectively overcomes successive-generation degeneration of yellow catfish germplasm, so that the disadvantage for culture benefit is reduced. The yellow catfish produced according to the technical route is pure in germplasm, high in stress resistance and environment-friendly, and an efficient, stable, healthy, environment-friendly, energy-saving and income-increasing reliable channel is provided for yellow catfish breeding industry with sustainable development.

The invention provides a method for enabling a woody plant material to form an adventitious root and grow into an own-rooted seedling. The method includes selecting a full annual lignified branch or a cryptophytic perennial branch of the woody plant, maintaining the humidity needed for the survival of the branch, keeping germinal shoots etiolation and delaying lignification through controlling light, and inducing lateral twigs to root. The method is convenient to operate, low-carbon, environment-friendly, low in cost, and capable of enabling tree species difficult to obtain own-rooted seedlings through existing methods to obtain own-rooted seedlings easily and increasing the material selecting range of own-rooted seedling of tree species easy to cut.

The invention discloses a large culture medium of epiphyte test tube and a preparation method. The culture medium is made by nutrient solution moistening amur foxtail or grass-seeds of green bristlegrass and the weight rate of the grass-seeds and the nutrient solution is 1 to 0.2 to 0.5. The surfaces of the grass-seeds are best moistened in and adhered with the nutrient solution. The test tube made by the culture medium can accelerate the growing speed of hypha and the time of the hypha filling with the test tube is two days earlier than the time when being grown in PDA, ten days earlier thanthe time when being grown in wooden meal and seven days earlier than the time when being grown in bamboo grain or wooden grain. The amount of seed grown in one test tube is equal to the amount of seeds grown in the test tube with PDA culture medium and going through three grades regeneration due that the grass-seed grain has the advantages of small volume, hard shell, good potential for growing epiphyte, low pollution as well as large surface and good dispersibility. The invention can be connected with the mushroom-produce bag and can reduce the culturing cycle by seventy days. The invention has the advantages of high producing efficiency, low production cost, low labor intensity and high commercial efficiency.