32results about How to "Increase body length" patented technology

The invention provides a DorysthenesgranulosusThomson indoor artificial breeding method comprising the following steps: collecting DorysthenesgranulosusThomson imago; making the DorysthenesgranulosusThomson imago to mate and lay eggs, and collecting and hatching DorysthenesgranulosusThomson eggs so as to obtain primary hatching larva; arranging culture holes on an end face of a fresh sugarcane stem, and inoculating the primary hatching larva into the culture holes for cultivation; transferring the larva into sugarcane stems for single breeding when the larva appetite largely grows; respectively placing pupa into an eclosion container for single eclosion after mature larva creep into soil and pupate; placing male/female mixed eclosion imago into an insect culture container for mating after DorysthenesgranulosusThomson eclosion, and paving a 1-3cm thickness fine sands on the bottom of the insect culture container so as to allow the DorysthenesgranulosusThomson to lay eggs. By using the method, the DorysthenesgranulosusThomson is high in egg hatching rate, high in larva survival rate, high oviposition amount, thus contentiously obtaining large amount fully grown individuals, and providing important base for DorysthenesgranulosusThomson control research.

The invention relates to the extraction field of natural active substances, in particular to a preparation method of Pueraria lobata polysaccharide and the application of Pueraria lobata polysaccharide as a growth promoter. The preparation method of the pueraria root polysaccharide comprises the following steps of: A) mixing Pueraria lobata root powder and water according to 1g: 2-20mL, and performing ultrasonic extraction at 40-80 DEG C; B) centrifuging that material liquid after ultrasonic extraction, mixing the centrifuged sediment and water according to 1g: 2-20mL, ultrasonic extraction at40-80 DEG C, and then centrifuging; C) mixing that supernatant after two centrifugation in the step B), and concentrating under reduced pressure to obtain concentrated solution; D) mixing that concentrated solution and ethanol according to the volume ratio of 1: 2-5 to carry out alcohol precipitation; E) centrifuging the product solution after alcohol precipitation, and concentrating the obtainedsupernatant under reduced pressure to obtain the concentrated solution to be Pueraria lobata polysaccharide. The preparation method is simple in operation and has high yield of Pueraria lobata polysaccharide.

The invention discloses a special feed capable of increasing the survival rate of leiocassis longirostris. The special feed comprises the following raw materials in parts by weight: 15-30 parts of sweet sorghum, 20-40 parts of oat flour, 10-20 parts of alfalfa powder, 10-18 parts of water hyacinth dry powder, 60-70 parts of a vegetable protein additive, 4-12 parts of kelp powder, 4-10 parts of puffed blood powder, 2-4 parts of rice wine distillers' grains, 2-4 parts of yeast protein, 4-8 parts of an immune enhancer, 2-4 parts of a Chinese herbal medicine additive and 4-6 parts of a chitosan compound, wherein the chitosan compound is prepared through the following technology: stirring the bentonite, the chitosan, a silane coupling agent and water, performing ultrasonic vibration, adding Tween 80, continuing performing stirring, performing filtering, performing washing and performing drying, so that the chitosan compound is obtained. According to the special feed, the leiocassis longirostris can easily adapt to breeding environment, the survival rate of seedlings is high, the immunity is high, the obtained leiocassis longirostris has the characteristics of being natural in body colorand healthy in fish body, the nutrient value of the leiocassis longirostris bred with the feed disclosed by the invention can be the same as that of wild leiocassis longirostris, and the requirementsfor high nutrient value of consumers can be met.

The invention discloses a rapid breeding technology of hapalogenys mucronatus. The rapid breeding technology comprises the following steps: treatment of a culture pond: selecting an elliptical culture pond, disinfecting the culture pond and culture tools by using a disinfectant, and cleaning the culture pond with seawater for later use; fry putting: selecting an ecological polyculture mode of hapalogenys mucronatus and perches; bait feeding: putting bait into the culture pond; carrying out bottom sucking and water changing continuously in the culture period, adopting aerated micro-flowing water for culture, and ensuring that water is fresh; grading at proper time: when the pond is cleaned and disinfected, independently selecting individuals growing slowest to another water body for independent culture; adopting a competitive mechanism of last elimination; and disease control: performing medicated bath disinfection and pond cleaning treatment on the fish bodies in the culture process. The rapid, efficient and healthy breeding technology for the hapalogenys mucronatus is provided; and the obtained hapalogenys mucronatus has the advantages of higher survival rate, higher body length, higher body mass, higher nutrient substances, higher nutritional value and higher polyunsaturated fatty acid content.

The invention discloses an ecological totally-enclosed circulating mariculture system which comprises a fish culture pond, a purification pond and a circulating unit. The fish culture pond has an area of 25-30 m<2> and water depth of 1.0-1.5 m; red sea bream is cultured in the fish culture pond; the putting density of the red sea bream is 10-20/m <3>; and the body length of the red sea bream is 12.0 +/-3.0 cm, and the weight of the red sea bream is 56.4 +/-25.0 g. Sesuvium portulacastrum is cultured in the purification pond, the specification of the purification pond is (3.5-4.5)m * (5.5-6.5)m, the water depth of the purification pond is 0.5-1.0 m, the purification pond is divided into 3-4 water channels at equal intervals, the water channels are connected in series end to end, and water flow bypasses the water channels in an S shape; and the density of the sesuvium portulacastrum is 20-30 plants/m<2>, the sesuvium portulacastrum plants are 35.9 +/-15.0 cm, and the average wet weight is 212.6 +/-100.0 g/plant. The circulating unit is used for enabling water in the fish culture pond to flow into the purification pond and enabling water in the purification pond to flow into the fish culture pond; and the culture water is circulated for 5-10 times every day between the fish culture pond and the purification pond. A breeding-planting-water quality purification three-in-one ecological culture system is constructed, and a benign composite ecological circulation system which can recycle energy and is stable in structure is formed.

The invention relates to a method for breeding crayfish after rice straw compost fermentation and returning to a field, and belongs to the technical field of crayfish breeding. The method specifically includes the steps of crushing rice straws, adding an organic material leavening agent, performing stacking, and continuously performing composting and fermenting for 60-80 days to obtain compost fermented rice straws; putting the compost fermented rice straws into a crayfish breeding field; planting elodea nuttallii in the crayfish breeding field; and putting young crayfishes into the crayfish breeding field where the elodea nuttallii is planted, and catching the young crayfishes after 50-60 days. According to the method for breeding the crayfish after rice straw compost fermentation and returning to the field, the rice straw is subjected to compost fermentation and then returned to the field for breeding the crayfish, so that the aims of fully utilizing the crop straw and increasing the breeding yield of the crayfish are achieved.

The invention belongs to the technical field of shrimp feed preparation, and discloses a preparation method of a feed for promoting growth and development of procambarus clarkia. Theprocambarus clarkia feed comprises white fish meal, soybean meal, fish oil, soybean phospholipid, flour, bran, earthworm powder, vitamin and mineral premix, monocalcium phosphate, choline chloride, molting element, dextrin and algin. According to the method, 3%-4% of the soybean phospholipid is added into the feed, so that the body length, the weight growth rate and the characteristic growth rate of procambarus clarkia juvenile shrimps can be effectively increased, the feed coefficient is reduced, the survival rate of the juvenile shrimps is increased, and the growth of the juvenile shrimps is accelerated; thedigestive enzyme activity and the oxidation resistance of the procambarus clarkia can be remarkably improved by adding 3% of the soybean phospholipid; and 3%-4% of the soybean phospholipid plays an important role in promoting the ovarian development of the procambarus clarkia, increasing the ovarian index, increasing the diameter of oocytes, accelerating the synthesis and accumulation of egg yellow phosphorus protein and promoting the maturation of the oocytes.

The invention provides a breeding and raising method of multi-rib tri-hybrid pigs. The breeding and raising method comprises the following steps: constructing a basic breeding group; breeding male pigs and female pigs for matching and farrowing; breeding piglets and seed selection; repeating matching and farrowing as well as seed selection. By the use of a multi-rib control major gene breeding technology, a high-level and large-scale Duroc core group is subjected to systematic breeding combined with gene breeding and conventional breeding, so that a new series of multi-rib, rapid-growing and high-meat-yield high-quality breeding pigs can be bred. The capability of independent innovation of the breeding pig enterprises of China is greatly improved, the core competitiveness of the breeding pig enterprises of the district and even China is enhanced, and a foundation is laid for creating a high-quality and high-end breeding pig culture base; meanwhile, a high-quality breeding pig source is supplied to live pig production of China, and the breeding and raising method has a giant market requirement and wide application and popularization prospect.

The invention discloses a method for promoting growth, development and reproductive development of yellow mealworms, and belongs to the technical field of feed. The method for promoting growth, development and reproductive development of yellow mealworms comprises the following steps: processing sweet potatoes to obtain sweet potato residue powder and black oil powder; feeding yellow mealworms with 25% of sweet potato powder and 75% of wheat bran or 40% of black oil powder and 60% of wheat bran in a growth and development period of the yellow mealworm larvae; and feeding the yellow mealworms with 2% of sweet potato powder and 75% of basal feed or 40% of black oil powder and 60% of wheat bran in a reproductive development period of the yellow mealworms. The yellow mealworms are fed with 25%of sweet potato powder and 75% of wheat bran to promote growth, development and reproductive development of yellow mealworms, and the yellow mealworms are fed with 40% of black oil powder and 60% ofwheat bran to promote growth, development and reproductive development of yellow mealworms.

The invention provides a cultivation method for multi-rib hybridization boars with high applicability. The cultivation method includes the steps: S10 selecting varieties or strains with more number and high applicability in the local area as female parents; S20 selecting the boars with allelic genes increasing number of ribs as male parents; S30 eliminating the all boars after the female parents and the male parents generate later generations, and reserving sows to obtain first-generation multi-rib hybridization sows. According to the cultivation method, multi-rib major gene cultivation technologies are controlled, and multi-rib hybridization fragrant pigs are selected and cultivated by the aid of a high-level and large-scale system of gene cultivation and conventional cultivation. The new fragrant pigs are more in rib and carcass lean meat, rapid in growth, excellent in meat flavor, good in reproductive performance and high in feed conversion.

The invention relates to a tiger frog breeding method, and belongs to the technical field of artificial breeding of tiger frogs. In order to achieve the purpose of breeding the tiger frogs efficiently, the tiger frog breeding method comprises the following steps that 1, newly hatched tiger frog tadpoles are put into in a light-proof terrarium filled with aerated water, and feeding is conducted atthe water temperature of 28-30 DEG C; 2, in the tadpole feeding process, LED green light with the peak wavelength being 527 nm and the half-wave width being 65 nm is used for irradiation for consecutive 24 hours daily until metamorphosis is completed. The method can be used for breeding high-quality young frogs efficiently.

The invention discloses a Litopenaeus vannamei culture method with the low bait coefficient. The method includes the following steps that 1, one aerator is arranged per mu, a laser emitting device is installed every 300 square meters, an ultrasonic generation device is installed every 100 square meters, water flows in, and the pH value and transparency are controlled; 2, shrimp larvae are put; 3, a nutrient enrichment material is fed on the first to fifth days after the shrimp larvae are put; 4, feedstuff for the mouth-open period stops being fed on the sixth day after the shrimp larvae are put, and a fitness material replaces the feedstuff for the mouth-open period to be fed for 20-35 days; 5, the fitness material and a meat increase material are mixed to be uniform according to the mass ratio of 1:0.5, and the mixture is fed for 6-10 days; 6, the fitness material and the meat increase material are mixed to be uniform according to the mass ratio of 1:1, and then the mixture is fed. The method has the advantages that the bait coefficient of Litopenaeus vannamei is remarkably reduced, the survival rate and per mu yield are effectively increased, and individuals of the Litopenaeus vannamei are longer and heavier within the same culture time.