82results about How to "Solve the survival rate" patented technology

The invention relates to aquaculture feed, in particular to litopenaeus vannamei compound feed special for winter shed cultivation and a preparation method of the feed. The feed comprises a protein source raw material, a fat source raw material, a sugar source raw material, an antioxidant, a phagostimulant, composite vitamin and composite mineral salt. The invention provides the litopenaeus vannamei compound feed special for winter shed cultivation and the preparation method of the feed, with the advantages of high survival rate, high growth speed, high stability in water, high ingestion speed, convenience for use and low environmental pollution, so as to solve the problems of low growth speed, serious disease, low survival rate and the like of the litopenaeus vannamei during winter shed cultivation at low temperature and promote the healthy development of the litopenaeus vannamei cultivation industry.

The invention discloses a method for cultivating Anji white tea in the Jiaodong area, which is characterized by including procedures of selecting and preparing a nursery, performing cutting, performing cuttage, putting a shed for shading, managing the nursery, seedling lifting and the like. By the method, the problem that seedlings of Anji white tea are unable to adapt to northern climate, low in survival rate, high in management difficulty and the like after introduction to the Jiaodong area is solved, and the method is applicable to propagation and cultivation of Anji white tea in the Jiaodong area.

The invention discloses a method for inducing blueberries to root by using liquid culture media and permeable matrix, comprising the following steps: (1) preparing rooting culturing media; (2) transferring the healthy and strong blueberry seedlings which are subcultured for 40d and are 3-4 cm high into the rooting culturing media, culturing the blueberry seedlings for 7-10d in the dark and for 12h/d for about 20d under intermitted illumination condition until the blueberry seedlings have 3-7 root systems of 0.5-2 cm long; and (3) transplanting the test-tube blueberry seedlings which are cultured for 30d to root, are 3-6 cm high and have the root length of 0.5-2 cm into the media in which the proportion of turfy soil to moss is 1:1, and managing the blueberry seedlings. The rooting culturing media is prepared according to the following substeps: 1) preparing 0.8 cm*1.2 cm filtering paper balls or defatted cotton balls or 0.2 cm*0.6 cm vermiculites which function as the matrix of the rooting culturing media; 2) preparing rooting culturing solution which has the WPM of 1/2, the IBA of 1.0-5.0 mg.L-1, the edible white sugar of 2 percent and the pH value of 5.0-5.2; and 3) adding 6-10 filtering paper balls or defatted cotton balls or 20-30 vermiculites which are soaked by the rooting culturing solution and adding 3-5 ml rooting culturing solution to each culturing bottle and capping the culturing to sterilize according to the routine method. The invention has short rooting period and low production cost, can ensure that 100 percent of the blueberry seedlings can root and over 95 percent of the transplanted blueberry seedlings can survive and realize the rapid industrialized propagation of the blueberry seedlings on a large scale.

A coilia ectenes step type breeding method comprises the nine steps of reserved parent pool simulated ecological cultivation, parent pool intensive culture, parent selection for induced spawning, parent induced spawning, natural insemination, germ cell collection, germ cell incubation, indoor intensive fry rearing in a cement pool and large-scale fry culture in an outdoor pool. The method is characterized in that filial-generation coilia ectenes adult fishes which are more than 2 years old and cultured by manpower are used as reserved parents for artificial propagation, and a natural ecology cultivation mode is simulated; the selected parents are transported and placed in an induced spawning pool, after parent induced spawning is conducted, the germ cells are collected, counted and transferred to an incubation pool, after the germ cells are collected, the germ cells are placed in the incubation pool with water, fries open the mouths 5-6 days after membrane rupture is conducted, yolks and freshwater rotifers which are filtered through a 80-mesh silk net are fed to the fries, after the fries are cultivated for 15 days, the fries are divided to different pools, and when the fries are as long as 20-30 mm, the fries are placed to outdoor pools to be cultivated.

The invention discloses a slow-release fertilizer for planting dendrobium officinale and a production method of the fertilizer. The slow-release fertilizer comprises the following raw materials in parts by weight: 30-60 parts of pine bran, 10-20 parts of plant ash, 8-15 parts of peanut bran, 8-15 parts of bat excrement, 3-5 parts of urea, 2-5 parts of calcium magnesium phosphate fertilizer, 1-2 parts of ferrous sulfate and 10-20 parts of biogas residues fermented in a methane tank. The method comprises the following steps: firstly, processing the raw materials by steam at 100-110 DEG C, and then adding biogas slurry fermented in the methane tank; adjusting the moisture content to 50-80%; putting into a cement pit or an earthen jar to hermetically ferment for 30-60 days; and adding a controlled release formulation, and preparing into granules by a granulator.

The invention discloses a method for artificially breeding, reproducing and releasing dace (leuciscus brandti), belongs to the field of artificial breeding, reproduction and releasing of fish and relates to a method for artificially breeding, reproducing and releasing fish. To solve the technical problem that the incubation rate and the survival rate are low, the method comprises the first step of catching the parent dace (leuciscus brandti), the second step of collecting, fertilizing and de-bonding eggs of the dace (leuciscus brandti), the third step of incubating fertilized eggs and rearing fry, and the fourth step of releasing the fry. By the adoption of the mode of aeration at the bottom of an incubation tank, dissolved oxygen during incubation of the fertilized eggs is increased; besides, due to the aeration, the viscosity of the fertilized eggs is lowered, and therefore the defects that in the prior art, the incubation rate and the survival rate are low can be effectively overcome. By adopting the method, the average daily incubation rate can reach over 80 percent, the birth rate of the fry can reach over 90 percent, and the survival rate can reach 95 percent.

The invention provides a method for doubling cone haploids. The method comprises the following steps: 1, cutting off the tips of coleoptiles of buds of corn haploids; and 2, soaking embryos of the buds of the corn haploids without the tips of coleoptiles in mixed liquid of colchicines and dimethyl sulfoxide, so as to obtain corn buts with doubled chromosome. The method for doubling cone haploids, which is provided by the invention, can remarkably improve the survival rate and maturing rate of the corn haploids, wherein the survival rate is higher than 70%, which is far higher than the survival rate of a control group which is generally lower than 50%, the maturing rate is higher than 10%, which is far higher than the maturing rate of the control group which is generally about 5%; moreover, the use amount of colchicines is 5-6 times. When applied to a haploid breeding system, the method can effectively promote the reform of the corn breeding technology to realize large-scale and engineering haploid breeding.

The invention belongs to the field of plant biotechnologies and particularly discloses a culture medium and culture method for promoting the growth of regeneration buds of echinacea purpurea. According to the culture medium, DA-6 (diethyl aminoethyl hexanoate) of corresponding concentration is particularly added to an MS formula in accordance with that the regeneration buds of different ploidies have different sensitivities to DA-6, besides adding 15-60g/L of saccharose, 3-9g/L of agar and 0.01-0.2mg/L of NAA (naphthalene acetic acid). The culture medium has the advantage that the height, weight, the weight, diameter and number of roots, the length of primary roots, total root length, root cap ratio and transplanting survival rate of the regeneration buds all can be increased remarkably. By applying the culture medium and the culture method, the development of the scientific research work related to the biotechnological breeding of echinacea purpurea can be promoted.

The invention discloses a method for cultivating vegetables by the aid of soilless culture substrates. The method includes proportioning agricultural waste; preprocessing and stacking the agricultural waste, turning piles of the agricultural waste, sieving, granulating and packaging the agricultural waste, and the like. The method has the advantages that technical difficult problems of instability in characters of raw materials of seedling substrates manufactured from biomass resources and incomplete decomposition of materials can be solved, the difficult problem of instability in the quality of products can be solved, difficult problems of poor root twisting, slow colonization and low survival rate of the seedling substrates manufactured from the biomass resources can be solved, and environmental pollution due to the waste can be prevented.

The invention discloses a cultivation and pruning method for Sichuan pepper trees and belongs to the technical field of crop planting. The method comprises the steps of 1, selection and treatment of agarden field; 2, seed collection and treatment; 3, seedling raising; 4, management at the seedling period; 5, overwintering management at the seedling period; 6, transplantation and interplanting; 7,cultivation management and pruning; 8, prevention and control of diseases and pests. By adopting the method, the Sichuan pepper trees and coptis chinensis are interplanted for cultivation, compared with common interplanting cultivation, coptis chinensis and the Sichuan pepper trees grow robustly, the yield of Sichuan peppers per plant is increased by 2.7%, the yield of coptis chinensis per seedling raising pit area is increased by about 8.5%, and the good economic benefit is achieved.

The invention provides a wild jujube stock immature stem grafting seedling culturing method for a jujube tree in a solar greenhouse. The method includes the following steps of A, scion preparation; B, seedling culturing, wherein wild jujube seeds are sown in the first ten-day period of January for seedling culturing, a wild jujube stock is stumped in early of middle of May, seedlings are grafted at the rootstock position of the wild jujube stock, the seedlings are cultured in mid-to-late October, and solar greenhouse nutrition bags are adopted for seedling culturing; C, manufacturing of the nutrition bags; D, manufacturing of a seedbed; E, seed treatment; F, sowing, wherein when white parts of 30% of the wild jujube seeds in the step E are exposed, sowing is conducted, sowing is selected to be conducted on sunny days, bottom water is sufficiently irrigated to the seedbed before sowing, the bed surface is slicked before the water completely seeps, three or four seeds are dibbled in each nutrition bag after the water completely seeps, the nutrition bags are covered with nutrient soil of 2 cm to 3 cm, and heat and moisture preservation is conducted; G, seedling management; H, grafting, wherein jujube tree scions are grafted on the wild jujube stock immature stem through a split grafting method; I, grafted seedling management; J, disease and pest prevention and control; K, nursery stock outplanting. The jujube tree adult seedling outplanting time is shortened, and the survival rate is high.

The invention discloses a tree planting system and method applicable to desert and dry-sand land. The tree planting system comprises a motor vehicle, a chassis, a hydraulic control system and a main vehicle platform, wherein a suction/discharge device for providing a power gas source to the vehicle rotary sandpit digging operation is arranged at the front end of the main vehicle platform; a sandpit grouting device for providing nutritional water retention slurry to the rotary pitting bottom sealing is arranged at the rear end of the main vehicle platform; the rear part of the main vehicle platform is provided with a mechanical arm device for providing mechanical guarantee to the vehicle rotary pitting operation; and a sandpit rotary digging device is arranged at the rear end of the mechanical arm device. The method is used for establishing a whole tree planting system for seedling culture, embryonic envelope preparation, rotary pitting, grouting, seedling planting, sand culture, watering and reserving of follow-up management mark; and moreover, the survival rate of tree planting can be guaranteed, the tree planting efficiency is improved, and the tree planting work is carried out steadily.

The invention relates to a method for intercropping lycium barbarum and honeysuckles in an arid desert area. The method includes the following steps of 1, excavation of lycium barbarum planting furrows; 2, excavation of intercropped honeysuckle planting furrows; 3, seedling selecting, wherein one-year-old lycium barbarum seedlings without disease and pest damage and one-year-old honeysuckle seedlings without disease and pest damage are selected; 4, planting, wherein after soil is unfrozen in spring of the next year, the lycium barbarum seedlings and the honeysuckle seedlings are pulled up and then immediately planted through a seedling planting device; 5, field management. According to the method, as the lycium barbarum and the honeysuckles are intercropped, reciprocal symbiosis of the reciprocal symbiosis and the honeysuckles under the arid desert condition can be achieved, the problems that when only the lycium barbarum is planted, benefits are single, and the survival rate of plants is low are solved, organic unification of ecological benefits, economic benefits and social benefits of desert governing is achieved, and technical supports are provided for safe and efficient agricultural yielding of the arid desert area accordingly.

The invention relates to an intermediate culture method for Holothuria scabra Jaeger, and belongs to the technical field of aquatic product culture. The method comprises the two aspects of indoor cement pond intermediate culture and outdoor net cage pond intermediate culture. According to the aspect of indoor cement pond intermediate culture, the steps such as water quality control, intermediate culture density control, bait casting, water changing and pouring into a pond, inflation, disease control, daily management and intermediate culture time control are included. According to the aspect of outdoor net cage pond intermediate culture, the steps such as preparation before seedling release, seedling feeding, bait feeding, water changing and seedling thinning are included. The method facilitates management and is low in labor intensity, the quality and survival rate of the whole young Holothuria scabra Jaeger can be improved, economic benefits can be improved, and the method is suitable for application and popularization in the aspect of aquaculture.

The invention discloses a biological compound soil conditioner and a preparation method thereof. The soil conditioner is prepared from the following raw materials: 5-20% of urea, 5-20% of ammonium dihydrogen phosphate, 1-4% of mycorrhizal fungi and the balance of active lignite. The preparation method comprises the steps of (1) crushing the active lignite into solids with wide range particles; (2) preparing a urea saturation solution; (3) preparing an ammonium dihydrogen phosphate saturation solution; (4) mixing and stirring active lignite particles with the urea saturation solution and the ammonium dihydrogen phosphate saturation solution; (5) ventilating and drying the evenly stirred mixture at a room temperature; (6) stirring and mixing the dried mixture and the mycorrhizal fungi evenly to obtain the biological compound soil conditioner; and (7) hermetically packaging the biological compound soil conditioner. The preparation method is simple; the produced biological compound soil conditioner has the characteristics of high biological activity, excellent adsorptive property and low cost, multiple nutrients for plant growth can be provided and the technical problems of serious water and fertilizer losses and a low plant survival rate in the soil conditioning process are solved.

The invention discloses a feed additive capable of improving survival rate of hybrid snakehead fingerlings as well as a feed and a preparation method of the feed additive. The additive is prepared from a functional additive A and a functional additive B, wherein the functional additive A is mainly prepared from the following raw materials in parts by weight: 20 to 40 parts of compound Chinese medicinal herb extract, 15 to 30 parts of compound amino acid, 8 to 16 parts of taurine, 10 to 20 parts of beer yeast extract, 5 to 15 parts of betaine and 5 to 10 parts of mannan oligosaccharides; the functional additive B is a micro-ecological preparation and accounts for 10 percent to 20 percent of the total weight of the additive. The additive disclosed by the invention has a feeding attraction effect and is used for accelerating conversion of feeding habits of the hybrid snakehead fingerlings, promoting digestive tract development of the fingerlings and improving the digestion and absorption rate of nutrient substances of the feed so as to promote the growth of the fingerlings; furthermore, the additive can also be used for improving the organism immunity of the fingerlings and reducing the bursting of diseases. When the additive is added into the feed, the survival rate and the weight gain rate of the fingerlings at a feeding habit conversion phase can be improved; a preparation process is simple and the cost is low.

The invention relates to a method for planting forage grass on a sunward side of hillside land with the slope greater than 15 degrees in an alpine mountainous area. The method comprises the steps thatthe forage grass is planted in a rotation place in the alpine mountainous area with the altitude of 2,000-2,500 m in the southwestern Yunnan province of China, the sunward-side hillside land with theslope greater than 15 degrees is selected as the rotation place, and after former crops are harvested, the forage grass is planted; forage grass planting is conducted by adopting the mode that 9-11%of annual ryegrass seeds, 18-22% of perennial ryegrass seeds, 9-11% of hybrid ryegrass seeds, 28-32% of dactylis glomerata seeds, 28-32% of trifolium repens seeds and base fertilizer are mixed and sowed, and grazing can be conducted when the forage grass grows till the height of a grass layer exceeds 5 cm; when the forage grass is surplus, the harvested forage grass is dried and prepared into green hay or silage, and the stubble height during grass harvesting is 5 cm. The method for planting the forage grass in the alpine mountainous area has the advantages that the method is suitable for being implemented in the southwestern Yunnan province of China, and the forage grass is quick in propagation, good in growth and significant in ecological restoration effect.

The invention discloses a seed introduction method of submerged plant vallisneria, which comprises the steps of collecting ripening fruits of the vallisneria, removing epicarp, obtaining seeds, washing the seeds with clean water within 0-24h to keep the seeds moist, transporting the collected seeds to a destination by a water-culture method, mixing the seeds transported to the destination with moist river sand, refrigerating the seeds at 0-10 DEG C, preserving the seeds by shading above 95% till complete darkness, ventilating and replenishing water frequently, maintaining a moisture content of each seed to be 35-50%, sowing the preserved seeds in a mixed matrix, a soil matrix or a yellow clay matrix, controlling a temperature to be 10-30 DEG C, the illumination intensity to be 800-3500LUX, and the everyday illumination time to be 10-12h, allowing the seeds to germinate and grow, obtaining germinated seedlings, planting the germinated seedlings in the mixed matrix with a 10-15cm water level for culturing, managing other conditions according to a convention, planting the vallisneria, and allowing the vallisneria to grow. The mixed matrix comprises the following components by total mass fraction: 20-40% of sand and 60-80% of soil. The seed introduction method is long in seed preservation time, high in germination rate, and high in emergence rate and planting survival rate.

The invention relates to a tissue culture rapid propagation system of European hornbeam, which is characterized by comprising the following process steps of: selecting a stem tip which fully grows and inoculating onto an induction medium after surface sterilization; culturing for 4 weeks and systemically calculating the induction rate; shearing a 1.5-2.0-cm stem segment, inoculating onto a proliferation medium and systemically calculating the proliferation times after 60 days; shearing a 3-4-cm long single seedling which grows strongly, inoculating onto a rooting medium and inducing rooting; culturing for 50 days and systemically calculating the rooting rate, the average root number and the average root length; and when the root length is 3-5 cm, hardening a seedling and transplanting, and investigating the transplanting survival rate of the seedling after 30 days. The tissue culture rapid propagation system has the advantages that a European hornbeam test tube seedling can be induced to quickly proliferate and generate a large amount of adventitious buds, the survival rate is up to 85 percent, and an effective way is provided for industrial seedling culture of the European hornbeam.

The invention discloses a method for grafting subtropical plateau native Rhododendron with Rhododendron hybridum comprising following steps: in mid-April, selecting 1-2 years old single-pole native Rhododendron from the mountain as a stock, and selecting Rhododendron hybridum branches having full branches and leaves, strong growth potential and no pest damage as scion woods; cutting the branches from the top of the stock and splitting the top of the stock in the middle; keeping two leaves in the Rhododendron hybridum scion woods; inserting the Rhododendron hybridum scion woods after peeling into the incision of the stock and binding the interface by plastic film; untying the tape after survival, and thinning leaves after 1-2 years and then shaping. Compared with present grafting method for Rhododendron hybridum, the provided method is simple and easy to operate, has high practicability and is easy to popularize; the method gives solutions to the problems that the appearance is affected due to unskilled grafting technology and the survival rate is low.

The invention relates to the technical field of cultivation of forest tree seedlings, in particular to a water and fertilizer management method for a rubber tree container seedling. The method comprises the following steps: uniformly mixing coco coir, farmland topsoil and farmyard manure as a cultivation substrate to be put into a seedling raising container; vertically placing the seedling raising container on a bracket, getting the bottom of the seedling raising container away from the ground, and transplanting the rubber tree seedling; irrigating the rubber tree seedling with clear water once through drip irrigation to keep the water mass fraction of the cultivation substrate above 80 percent; irrigating water and a fertilizer once every 2-15 days through drip irrigation, wherein the amount of the fertilizer applied for each plant is 30-60 ml of farmyard biogas slurry manure or 0.5-1 g of a compound fertilizer, and the nutrition supply of the plant is guaranteed until to out-planting of the rubber tree seedling. The method is suitable for cultivating full stands with complete developed root systems and longer main roots; the problems of more labor for seedling raising of the container seedling, waste of water and fertilizer, low planting survival rate and the like for a long time are solved.

The invention discloses a Staphylea bumalda tender branch cutting seedling cultivation method. The method includes the first step of cutting seedling base facilities, the second step of a cutting matrix, the third step of cutting selection and cutting shoot preparation, the fourth step of cutting, the fifth step of post-cutting management, the sixth step of disease and pest prevention, and the seventh step of seedling selling. By means of seedlings cultivated by conducting root promotion on cutting shoots and processing ends of cutting shoots, the quality and resistance of cutting seedlings are improved, and the plantation period of Staphylea bumalda can be greatly shortened by planting young seedlings of cutting seedling cultivation. Meanwhile, by means of the tender branch cutting seedling cultivation technology, excellent characteristics of mothers are easily ensured, local material utilization, local seedling cultivation and local plantation can be easily conducted, and the advantages of being rapid in growth, high in yield, high in adaptability and the like of seedlings are fully shown after plantation. In addition, high-quality strong seedlings are cultivated through scientific management of cutting seedling cultivation, young seedlings subjected to cutting grow neatly, the seedling disease rate is decreased, the economic value of seedlings and the survival rate of seedling culture can be increased, and social and economic benefits are improved.

The invention discloses a strengthening breeding method of parent fishes of pseudorasbora parva. The method includes the steps of parent fish selection, pond selection and treatment, parent fish strengthening breeding, water temperature adjustment, daily management and the like. According to the strengthening breeding method, gonad development of the parent fishes of the pseudorasbora parva can be stimulated, and the success rate of parent rearing maturity is improved; meanwhile rapid growth of the parent fishes is promoted, the survival rate of the parent fishes is improved, the problem that the parent quality and the survival rate of the pseudorasbora parva are hard to guarantee is effectively solved, and the method lays a technical foundation for artificial breeding of the pseudorasbora parva in China and has important significance for industrialization exploitation of the pseudorasbora parva.

The invention discloses a rooting culture medium for culturing dendrobium officinale plantlets and belonging to the field of the plant tissue culturing technology. The rooting culture medium for culturing the dendrobium officinale plantlets uses a self-made mother liquor as a basic culture medium; 5-9 g/L of agar, 20-22 g/L of sugar, 0.5-0.55 g/L of active carbon, 50-55 g/L of banana, 1.5-1.8 g/L of self-made natural organic liquid fertilizer and 1.5-2.5 ml/L of sterilizing agent are added to the basic culture medium; and the pH value in the rooting culture medium is 5.4-5.8. The rooting culture medium plays a role in promoting roots well and solves problems of slow rooting and lower survival rate in the traditional culturing method of dendrobium officinale; compared with the seedlings cultured by the culture mediums without natural organic matters, the thickness, height and leaf quantity of the cultured dendrobium officinale seedlings are increased and the roots are promoted well.

The invention relates to fruit tree seedling culture technology, in particular to a persimmon tree quick seedling culture method. The persimmon tree quick seedling culture method includes the following steps: site selection and soil preparation; cord frame heightening to be beds; seed soaking and germination accelerating; seeding in proper time; arc-shaped shed covering; management in sheds; early grafting; nursery stock management; and nursery stock maturing. The persimmon tree quick seedling culture method is short in period, convenient to operate, easy to popularize and use, in addition, grafting survival rates are high, nursery stock grows uniformly, the height of the nursery stock can reach more than 1.5m, outplanting rates can be 90%, and the obvious economic benefits of seeding, grafting and outplanting at the same year can be achieved.

The invention discloses a method for improving the survival rate of young trees in the desert. The method comprises the following steps: preparing a soaking mud liquid, that is, the cohesive soil or heavy clay is crushed and sieved (5 mm), the crushed and sieved cohesive soil or heavy clay is added in clean water to be evenly stirred, and the solid-to-liquid ratio is 1:2; a water-retaining agent of 10-30 g is added in every 1000 ml of solution for sufficient stirring, and according to the use area, the lower limit 10 g is taken when the annual mean precipitation is 400 mm above, the upper limit 30 g is taken when the annual mean precipitation is 200 mm below, and the medium value is taken when the annual mean precipitation is 200-400 mm; a woven biological protective disc is soaked in the mud liquid for 24 hours, and dried in the shade for 48 hours; after the tree seedlings are planted, the sand soil around the roots of the tree seedlings is dug for 2-4 cm to take the biological protective disc out, the stems of the tree seedlings are sleeved from notches, and the quick evaporation of soil moisture due to the sustained wind can be effectively inhibited; and meanwhile, the soil temperature of the root layer is increased.

The invention discloses a schizothorax waltoni anesthesia method and relates to application of the method in schizothorax waltoni long-distance transport and short-time water-leaving practice of schizothorax waltoni. The method includes steps: 1) anesthesia water source preparation A, to be more specific, adding a water source at the same temperature with water in a schizothorax waltoni aquaculture pond into an anesthesia container, wherein the temperature is 15-20 DEG C, and dissolved oxygen content is larger than or equal to 5mg/L; 2) MS-222 anesthesia liquid preparation B, to be more specific, adding MS-222 powder into the water source obtained in the step 1) to prepare anesthesia liquid; 3) schizothorax waltoni anesthesia C, to be more specific, subjecting schizothorax waltoni to anesthesia in the anesthesia liquid; 4) after-anesthesia recovery, to be more specific, enabling schizothorax waltoni to recover to normally swim for 3-6min in clear water after anesthesia. The method is feasible, simple and convenient to operate and effective in anesthesia effect, and problems of disease resistance decline and low survival rate due to stress reaction of schizothorax waltoni in transport and water-leaving process are solved.

The invention discloses special starter feed for polyodonspathala and a preparation method thereof. The feed is prepared from the following components in percentage by mass: 10-40 percent of fish meal, 10-30 percent of chicken meal, 3-10 percent of egg powder, 3-10 percent of beer yeast, 1-5 percent of wet sandworms, 10-30 percent of shrimp flesh, 10-15 percent of flour, 5-10 percent of soybean meal, 1-5 percent of fish oil, 1-3 percent of glycine betaine, 1-2 percent of vitamin mixture, 2-4 percent of mineral mixture and 1-2 percent of attractant. The special starter feed for polyodonspathalais developed for the special morpha and nutritional requirement of polyodonspathala, can meet the requirement of the polyodonspathala, and can be used for remarkably improving the survival rate. Thestarter feed breaks through the technical problem on traditional seedling, can solve the problems of transferring difficulty and low survival rate in production and reducing the cost for fries, and has good digestibility and absorbability, good suspension performance and good water resistance.

The invention discloses a method for repairing contaminated soil by using a natural pore soil-conserving and planting device. The method comprises the following steps: (1) selecting natural porous medium after airing, including sundried loofah sponge; (2) taking a section of sundried loofah sponge, filling by nutrient soil after taking a cavity, and planting the plant or seeds for repairing petroleum- or heavy metal-polluted soil into the natural pore soil-conserving and planting device formed by the loofah sponge, so as to ensure that the fibrous root can pass through the outside of the planting device and freely grow towards the periphery, and the length of the section of loofah sponge is 6-15cm. The plant root can absorb harmful substances such as petroleum hydrocarbon in soil, meanwhile, microorganisms on the fibrous root can degrade petroleum hydrocarbon and the like, and the planting device is planted in the repair region and prompted to grow, so that the petroleum-contaminated soil is quickly repaired. By adopting the method, the problems of low efficiency and low survival rate in the traditional repair of the petroleum-contaminated soil by the organisms are solved, the used material is a natural plant material, and secondary pollution to the repaired environment is avoided.

The invention belongs to the technical field of plant tissue culture, and particularly discloses a method for transplanting and hardening tissue culture seedlings of rabdosia nervosa. The method for transplanting and hardening the tissue culture seedlings of the rabdosia nervosa comprises the following steps of (1) selecting seedlings with roots; (2) performing pretreatment before transplanting; (3) proportioning transplanting mediums; and (4) controlling a seedling-hardening environment: putting the transplanted rabdosia nervosa into a greenhouse for seedling hardening, and adjusting and controlling light, temperature and humidity. The method can effectively solves the phenomena that water losses are severe, the survival rate is low and the commodity rate is low during transplanting and seedling hardening of the rabdosia nervosa; by proportioning the different mediums, cost can be reduced, the seedling transplanting flow is simplified, and the survival rate of seedling transplanting reaches up to 95%; by controlling external conditions of seedling hardening after transplanting, the problem that the water losses of the tissue culture seedlings of the rabdosia nervosa are severe canbe effectively solved, and thereby, commodity rate of the seedlings is increased; the market requirements can be effectively met; and a plenty of high-quality rabdosia nervosa seedlings are rapidly supplied for markets.