220results about How to "Reduce growth impact" patented technology

The invention provides a method for animal and plant-biochar synergistically restoring of petroleum-heavy metal polluted soil. Biological carbon base fertilizer is applied into the petroleum-heavy metal polluted soil and mixed evenly, and seasoning is conducted; earthworms are placed in the petroleum-heavy metal polluted soil to be bred after the seasoning is completed, then castor-oil plants are planted, and the castor-oil plants are removed overall after the harvesting of fruits of the castor-oil plants is completed; after the castor-oil plants are removed overall, the biological carbon base fertilizer is applied into the petroleum-heavy metal polluted soil again and mixed evenly, and seasoning is conducted; after the seasoning, earthworms are placed in the petroleum-heavy metal polluted soil to be bred, and then willows are planted; and the steps are executed circularly and repeatedly until the content of heavy metal in the soil is up to the safety standard. According to the method, the soil remediation effect is good; the combination of the biochar, animals and plants reinforces compound restoration and the effect is very obvious. In addition, secondary pollution to the soil is avoided.

The invention belongs to the technical field of environment pollution treatment, and more specifically relates to a heavy metal-polluted soil repairing agent prepared by attapulgite. The attapulgite-based soil heavy metal repairing agent is obtained by steps of raw ore fragmentation, acidifying treatment, airing screening, roasting and soil heavy metal restoration. According to the attapulgite-based soil heavy metal repairing agent through acidifying and heat modification, attapulgite clay has characteristics of large specific surface area and high porosity amount due to sulfuric acid acidifying treatment of the attapulgite clay, activity and adsorptivity are increased, proportion of soluble heavy metals in the soil can be effectively reduced, soil heavy metal passivation effect can be reached, and soil heavy metal pollution can be remediated.

The invention discloses a high-efficiency inducing screening method for parthenogernesis haploid of a plant receptor. The high-efficiency screening method is characterized in that an expression box with double markers of embryo-specific promoter ZmESP-driven fluorescent protein eGFP and embryo milk aleurone layer specific promoter HvASP-promoted fluorescent protein DsRED forms an embryo-embryo milk double-fluorescent marker carrier; based on the corn, rice, wheat and barley parthenogernesis haploid inducing series with embryo-embryo milk tissue specific double fluorescent markers, the haploidcan be accurately and efficiently verified and screened in a large-scale way, and the particular advantage is realized in the breeding of haploid; the limitation to the expression of seed anthocyaninor content of oil by the embryo-embryo milk color or oil content screening markers due to genetic background can be overcome, and the haploid seeds can be stably and efficiently screened; the high-efficiency screening method can be applied to the materials with any color and oil content under any genetic background, the limitation to the receptor in the prior art is overcome, and the important meaning is realized on the breeding of double haploids.

The invention belongs to the technical field of aquaculture, and particularly relates to a crab feed. The crab feed is prepared from the following raw materials in percentage by weight: 25-28 percent of wheat flour, 9-12 percent of corn DDGS (distillers dried grains with soluble), 15-18 percent of fly maggot powder, 12-14 percent of albumen powder, 3-5 percent of beer yeast, 0.8-1.5 percent of DHA (docosahexaenoic acid) microalgae oil, 0.5-1 percent of EPA (eicosapentaenoic acid) refined oil, 2 percent of fish oil, 1 percent of kelp flour, 0.1-0.2 percent of choline chloride, 0.2 percent of sodium chloride, 0.04-0.05 percent of L-carnitine, 1-2 percent of chitosan, 1-2 percent of tea polyphenol, 0-1 percent of garlic, 2-4 percent of isomaltooligosaccharide, 0.3 percent of composite bacillus, 0.05-0.06 percent of mildew preventive, 1-3 percent of compound adhesive, 1-2 percent of compound mineral substance, 0.5-1.5 percent of vitamin complex and the balance of biogas residue. The crab feed is capable of increasing the survival rate of crabs, meeting the growth demand of the crabs and preventing the fish flour from being used as a raw material.

Provided is a trimming method for elongated and upright trunks of pear trees. The method comprises following steps: creating a hedge frame mesh, filed planting of nursery stocks, cutting, bud picking, vertically binding lignified parts of new shoots to the mesh, bud-notching, basal angles and waist angles opening, thinning and branching, promoting formation of flower buds, and management of continued branchs of central branches and lateral branches. The trimming method for elongated and upright trunks of pear trees helps to realize high-density of plantation pear trees.

The invention discloses a vegetation evapotranspiration monitoring device suitable for a complex surface. According to the vegetation evapotranspiration monitoring device disclosed by the invention, by regulating air flows at the inlet and the outlet and combining a stirring fan, the air humidity condition in a hood box of the vegetation evapotranspiration monitoring device is regulated, and water vapor is prevented from condensing; a base of the vegetation evapotranspiration monitoring device is provided with telescopic seat legs and a soft transparent sealing material and does not have a need of ensuring strict sealing when being mounted, so that the mounting difficulty is greatly weakened, and the vegetation evapotranspiration monitoring device is suitable for being mounted and used under the complex surface condition; as being mounted on the ground surface, the vegetation evapotranspiration monitoring device has small influence on the underground hydrology process including groundwater replenishment and soil moisture movement. The invention also discloses a vegetation evapotranspiration monitoring method suitable for the complex surface. According to the vegetation evapotranspiration monitoring method disclosed by the invention, the evapotranspiration rate of vegetation is determined by determining variations of temperature and humidity of air in the sealed box body caused by vegetation evapotranspiration and a humidity difference of exchanged air; the accuracy is high, and dynamic variation of vegetation evapotranspiration can be captured. The vegetation evapotranspiration monitoring device has a simple and clear structure, is flexible in size, convenient and simple in mounting and low in cost and can be widely applied to the fields including the ecological field, the meteorological field, the hydrological field and the agriculture and forest field.

The invention aims to provide a seed treatment agent composition having mouse or bird repellent effects and an application method thereof and provides a composition of a suspension concentrate for seed dressing and a sustained release repellent. The contact between seeds and chemical components is reduced to the largest extent through layered coating, the goal of driving mice or birds can be achieved while insect killing and sterilization for promoting plant growth are achieved, the goal of adding a sustained release agent is to reduce the influence of the repellent on pesticide active ingredients and avoid pesticide hazard, and the mouse and bird repellent duration of the repellent can be prolonged. The composition can be widely applied to agriculture, forestry and grassland farming seed ratproof treatment, and the blank of a seed treatment agent in the function is filled.

The invention discloses a plastic film mulching cultivation method suitable for autumn-planted peanuts in subtropical regions. The method is as follows: carrying out soil preparation as soon as possible after harvesting previous crops, combining the oil preparation with fertilization together, and adopting the one-time fertilization way; firstly mulching a film for covering the soil before seeding, and utilizing the high temperature in late summer or early autumn in the subtropical regions for killing partial pathogens, weeds and pests in the soil; adopting the technology of firstly punching and then seeding, and seeding peanut seeds in holes without covering the seeds in the plastic film for preventing the high temperature from baking the seeds; adopting the technology of sequentially covering the soil, the seeds and the film for preventing hot airflow in the film from escaping and burning seedlings; and simultaneously effectively reducing water content in the soil after heavy rain and being conductive to the germination of the peanut seeds. The method is simple, practical, easy to master and convenient to popularize, and can solve the problem that the plastic film mulching technology can not be applied in the autumn-planted peanuts in the subtropical regions, significantly improve the output of the autumn-planted peanuts in the subtropical regions and be particularly applicable to the cultivation of the autumn-planted peanuts in dry land and rain-fed fields in rain-fed areas of the subtropical regions.

The invention belongs to the technical field of crop growth detection, and particularly relates to a crop root growth detection system and detection method. According to the crop root growth detection system and detection method provided by the embodiment, the diameter is small, and a detection pipeline can be made thinner, so that influence on normal growth of crop roots is greatly reduced by using a detection head based on light-guide fiber; besides, the detection pipeline is set to be bent pipe or other shapes, multi-point and multi-period root growth and shape monitoring in soil as well as detection of root growth at any position can be carried out, so that the degree of spatial freedom of crop root growth detection is greatly improved, and a new method is provided for in-situ growth and shape detection of the crop roots.

The invention discloses a trifurcate tree seedling supporting device. The device comprises three annular frames, and the two adjacent annular frames are connected through a telescopic adjusting mechanism. Each annular frame is uniformly provided with three clamping mechanisms which can move in a radial direction, and supporting feet on the outer side, the supporting feet can incline downward and outward and extend to insert into soil. The annular frame is formed by three arc rods. One end of the arc rod is provided with a plugging projection, and the other end of the arc rod is correspondingly provided with a slot used for the plugging projection on the arc rod to insert. The clamping mechanism comprises an adjusting screw and a clamping block. The adjusting screw is screwed on the arc rod. The inner end of the adjusting screw is provided with a ball. The outer end face of the clamping block is provided with a spherical groove, to form spherical hinge connection. Through using the above structure, the invention provides the tree seedling supporting device which is convenient to assemble, and adjustable in size and orientation, and has good supporting protection effect on a trifurcate tree seedling, and has little influence on normal growth.

A waveguide photodetector and forming method thereof are provided. The method of forming a waveguide photodetector includes: forming a waveguide on a silicon-on-insulator(SOI) substrate(100), depositing a first oxide coating over the waveguide and on the SOI substrate(102), creating a seed window through the first oxide coating to a bulk silicon layer of the SOI substrate(104), depositing a photodetector material into the seed window and on top of the first oxide coating over the waveguide(106), depositing a second oxide coating over the photodetector material and over the first oxide coating deposited over the waveguide and on the SOI substrate(108), and applying thermal energy to liquefy the photodetector material(110). Thereby, the leakage current characteristics of the waveguide photodetector are improved.

The invention discloses a production method for lipid through coupled culture of microbes. The method comprises the following steps: (1) culturing autotrophic microalgae seed liquid and carrying out enlarged culture until the OD value of biomass is 5.0 to 10.0, wherein the pH value of microalgae seed liquid having undergone enlarged culture is 9 to 12; (2) culturing facultative anaerobic bacteria seed liquid and carrying out fed-batch fermentation; and (3) during the process of fed-batch fermentation of facultative anaerobic bacteria, controlling the pH value in the fermentation process of the facultative anaerobic bacteria to be in a range of 6 to 9 in an illuminated bioreactor by using the prepared microalgae seed liquid having undergone enlarged culture in step (1) as an alkali neutralizing agent for bacterial fermentation and carrying out coupled culture of the facultative anaerobic bacteria and autotrophic microalgae. The method provided by the invention has the advantages of increased harvest yield of the autotrophic microalgae, an improved utilization rate of an inorganic carbon source, increased content of microbial lipid, a simplified culture apparatus and the like.

A bean sprouting machine comprises a culture barrel, a sprout culture basin and a water box, wherein the sprout culture basin and the water box are sequentially placed in the culture barrel from bottom to top, and water outlets are formed in the lower part of the culture barrel; a plurality of water leakage holes are densely distributed in the bottom surface of the sprout culture basin; the water box comprises a water overflow box and an overflowed water collection disc located at the bottom of the water overflow box and used for collecting water overflowed from the water overflow box; a plurality of water overflow holes are formed in the center of the vertical wall of the water overflow box; water spraying holes for uniformly spraying water on the sprout culture basin are densely distributed in the bottom surface of the overflowed water collection disc; a water pipe communicated with tap water is arranged in the water overflow box. The tap water as running water is poured into the water box, as a result, time-consumption, complex, regular and manual water exchange work is avoided, the practical amount of the water for culturing sprouts is less, and the cost is far lower than that of the electricity consumed by a water pump and daily water exchange. Therefore, the bean sprouting machine is more reasonable, simpler and more convenient to use and lower in cost, in addition, the pressure of the weight of the water box and the water in the water box is exerted on the sprouts, and accordingly, the sprouts grow to be thicker and stronger under the action of external pressure.

The invention discloses bacillus velezensis D1 with a function of efficiently degrading feed starches in an aquaculture water body and application of the bacillus velezensis D1. The preservation number of the bacillus velezensis D1 is GDMCC No:60943. The bacillus velezensis D1 disclosed by the invention is separated from intestinal tracts of prawns selves, and verification shows that the bacteriumis capable of extracellularly secreting amylase, and is capable of promoting digestion and absorption of starches and polysaccharides in feeds by bred animals after being immobilized in intestinal tracks of the bred animals. Gnotobiotic experiments of the bacterium with artemia show that the strain is free of stress or toxic effect on the bred animals even in a high concentration. The bacillus velezensis D1 grows optimally when the temperature is 25 DEG C, the primary pH value is 5.0 and the salinity is 2%; after the bacillus velezensis D1 is inoculated in a breeding water body, water qualitycan be stable, breeding targets grow healthily, and the bacterium is good in adaptability, high in security and environmentally friendly, can be used as a novel micro-ecological preparation for developing sustainable seawater breeding modes of green breeding, and has good application prospects.

The invention discloses a preparation method of purely-fermented shredded beef jerks, which comprises the following steps: (1) bacteria-reducing treatment: uniformly coating table salt with a mass accounting for 10-12% of that of a beef on the surface of the beef which is subjected to fascia and fat eliminating and cleaned, kneading for 8.0-10 min, washing off the table salt on the surface of the beef by using sterile water, putting the cleaned beef into a lactic acid solution with a mass concentration of 2.5-3.5% to soak for 8.0-10 min, wherein the ratio of the volume of the lactic acid solution to the mass of the cleaned beef is (1.5-2.5) : 1, the volume unit is mL, and the mass unit is g; and after soaking is completed, washing off a lactic acid on the surface of the beef by using sterile water, so that a beef subjected to bacteria-reducing treatment is obtained; (2) inoculated fermentation; (3) salting; (4) drying; (5) boiling; and (6) molding, flavoring, packaging and sterilizing. The method disclosed by the invention can shorten the fermentation time, and improve the safety of products.

The invention belongs to the technical field of mariculture, and in particular relates to a formula feed for breeding portunus trituberculatus The formula feed for breeding portunus trituberculatus comprises the following components by weight percent: 25-28 percent of wheat flour, 9-12 percent of corn DDGS (distillers dried grains with soluble), 15-18 percent of fly larvae powder, 12-14 percent of protein powder, 3-5 percent of saccharomyces cerevisiae, 1-2 percent of DHA (docosahexaenoic acid), 1 percent of EPA (timnodonic acid) refined oil, 2 percent of fish oil, 1 percent of kelp powder, 0.1-0.2 percent of choline chloride, 0.2 percent of sodium chloride, 0.04-0.05 percent of L-carnitine, 2-4 percent of isomaltooligosacharide, 0.3 percent of composite bacillus, 0.05-0.06 percent of antimildew agent, 1-3 percent of compound binder, 1-2 percent of composite mineral substance, 0.5-1.5 percent of composite vitamin and the balance of biogas residue. In the formula feed provided by the invention, a plurality of components are effectively mixed, and use of fish meal and soybean meal is avoided, therefore, the influence of anti-nutritional factors in the soybean meal on the growth of portunus trituberculatus is reduced. The formula feed has the advantages of reasonable formula, sufficient material source and rich nutrient of material components. The recycling use ratio is greatly improved, and the survival rate and weight gain rate of portunus trituberculatus are significantly improved.

The invention belongs to the technical field of phellinus igniarius production, and particularly relates to a phellinus igniarius planting method. The phellinus igniarius planting method comprises thefollowing steps of (1) preparing a phellinus igniarius mother strain culture medium; (2) performing phellinus linteus mother strain culture; (3) preparing a phellinus igniarius fungus bag; (4) performing phellinus igniarius culture; (5) performing phellinus igniarius rejuvenation culture; and (6) performing phellinus igniarius picking. Through the design of culture medium components in the phellinus igniarius cultivation and planting process, the nutrient component structure of the culture medium is remarkably improved, long-term nutrient supply support is provided for growth of phellinus igniarius, and in addition, through the synergistic effect of radix angelicae pubescentis, cortex acanthopanacis and silkworm excrement in a formula, the antibacterial property in the culture medium is remarkably improved; and through the combination of the structural design of a cultivation tank and the components of the culture medium, the planting period of the phellinus igniarius is shorter, thephellinus igniarius can be cultivated for many years, the antibacterial property is stronger, and the contents of total triterpenes and total flavonoids in the picked phellinus igniarius are higher.

The invention discloses a single crystal furnace heat shield and its preparation method. The single crystal furnace heat shield comprises a furnace body, which is internally provided with a zirconia ceramic heat insulation barrel. A nano-tungsten film layer is plated on a heat insulation barrel inner wall, and a thin-wall molybdenum cylinder is disposed on a zirconia ceramic heat insulation barrel outer wall. The preparation method includes: doping zirconia powder with 3% Y2O3 powder to prepare an arc zirconia ceramic tile; using argon as a working gas, in a magnetron sputtering room, conducting direct current sputtering on a flake tungsten target material with purity of 99.99%, and sputtering the nano-tungsten film layer on the treated arc zirconia ceramic tile inner wall; employing the arc zirconia ceramic tile plated with the nano-tungsten film layer to pile the cylindrical zirconia ceramic heat insulation barrel in the furnace body; and disposing the thin-wall molybdenum cylinder outside the zirconia ceramic heat insulation barrel. The invention aims to provide the single crystal furnace heat shield and its preparation method. The single crystal furnace heat shield has the advantages of simple structure, low price, stable performance, and can effectively guarantee the good thermal insulation property needed by sapphire single crystal growth.

The invention provides a system for automatically adjusting the water supply quantity according to crop growth environmental changes. The system comprises an environment information detection module, a central analysis control module and an automatic irrigation module. An operational method in the central analysis control module comprises the step of building a relation formula between an environment change result and water supply information data, wherein the formula is shown in the description, and the function formula f shows the corresponding relation between the environment change result and water supply information. Automatic water irrigation under the environment change condition is achieved so as to lower the crop death rate; the labor cost is saved, environment information values can be automatically detected, and automatic irrigation is achieved; growth, development and morphogenesis of crops can be automatically adjusted, the culture period can be shortened, the quality can be improved, energy consumption can be greatly lowered, and the cost can be lowered.

The invention discloses a fertilizer applying method for reducing the fertilizer application and improving the fertilizer effect in a soybean-corn rotation system. The fertilizer applying method comprises the following steps of: (S1) detecting the water content in planting soil, and adjusting times, frequency and time of sprinkling irrigation according to a detection result; (S2) digging plantingholes, paving modified base soil, base fertilizer and a mixture of the base fertilizer and wood dust, and planting and curing crops according to a conventional method; (S3) regularly applying composite organic fertilizer A to the planting soil in the growth process of the crops, applying composite organic fertilizer B to the planting soil of the crops when the crops grow to a flowering period, increasing fertilizer applying frequency, and restoring use of the composite organic fertilizer A for application when the crops grow to a manure period and restoring the original fertilizer applying frequency. The fertilizer applying method disclosed by the invention has the beneficial effects that water and nutrients needed for the crops are ensured, the absorption efficiency of the crops is high,the growth speed is fast, the growth period is short, the yield is high, the chemical fertilizer use amount is less and the use frequency is low, so that the fertilizer applying method is especially suitable for the northeast region of China.

The invention discloses a method for delaying the hatching of F1 hybrids of incubated silkworm eggs in hatching. The F1 hybrids of silkworm eggs in hatching are subjected to three-section type low-temperature preservation, and graine embryos of the F1 hybrids of silkworm eggs of mulberry silkworms are grown through the hatching processing to a body pigmentation stage, and then are continuously preserved at the certain environment temperature; 10 silkworm eggs boxes are bundled by a plastic rope, and put in a double-layered black cloth bag wrung after being soaked in water, and the silkworm eggs in the 10 silkworm eggs boxes are uniformly shaken and horizontally placed; and the black cloth bag wrapping the silkworm eggs boxes is put in a certain temperature environment for preservation, and then is transferred in a refrigerator for refrigeration. Under the condition of not influencing the hatching rate and the growth of the F1 hybrids of hatched silkworm eggs, the gathering data of newly hatched silkworms is delayed by 1 to 25 days so as to be favorable for adjusting the production data of silkworm cocoons, and to reduce the influence of the natural disaster and the temperature anomaly on the growth of mulberry leaves and the influence of the silkworm poisoning and the silkworm disease and other disasters on the growth of the silkworm cocoons, and the method disclosed by the invention is a safe emergency disposal technology for sericulture, and has the hatching rate of more than 95%.

The invention provides a method for recovering acid-heavy metal contaminated soil. The method includes the steps that biological activated carbon base fertilizer is applied to the acid-heavy metal contaminated soil, mixed evenly and aged; after aging is finished, earthworms are placed in the soil to be cultured, and castor oil plants are planted and completely removed after fruits of the castor oil plants are harvested; after the castor oil plants are completely removed, earthworms are placed in the soil to be cultured again; after the earthworms are introduced into the soil normally, willows are planted, and the willows are completely removed after a period of time; the steps mentioned above are cyclically and repeatedly executed till the content of heavy metal in the soil reaches the safety standard. The method for recovering the acid-heavy metal contaminated soil has the extremely remarkable beneficial effects that a restoration period is short and the soil cannot be secondarily contaminated.

A grape water-fertilizer irrigation management method is characterized by including vineyard construction, base fertilizer application and water-fertilizer application in each growth stage of grapes.The grape water-fertilizer irrigation management method has advantages that by combination of grape growth conditions and growth periods, water-fertilizer demands of grapes in different stages are met, the grape fruiting rate is increased while fruit quality is improved, and produced fruits are unique in flavor, delicious in juice, sweet, palatable and high in nutritive value.

The invention discloses a buffer layer of a secondary electron emission film and a preparation method thereof. When a magnesium oxide composite film secondary electron emission source doped with metal materials is prepared, the nickel oxide buffer layer is deposited on a metal substrate in a nickel target sputtering or nickel oxide target sputtering mode, and then a magnesium oxide composite film doped with the metal materials is deposited on the nickel oxide buffer layer. When the nickel oxide buffer layer is deposited, the temperature of the metal substrate is set to be 200-400 DEG C, argon and oxygen are led into a film coating cavity at the same time or only argon is led into the film coating cavity, and the air pressure is 0.1-1 Pa. The thickness of the nickel oxide buffer layer is 5-90 nm, and the grain size of nickel oxide is 3-20 nm. Since the nickel oxide buffer layer is deposited on the metal substrate, the inhibiting effect of metal deposition on magnesium oxide grain growth can be reduced and magnesium oxide grain growth is promoted when the magnesium oxide composite film doped with the metal materials is deposited later, and the secondary electron emission performance of the composite film can be improved.

The invention discloses a high-efficiency photo-thermal resource utilizing device used for wheat planting. The high-efficiency photo-thermal resource utilizing device comprises a greenhouse, the greenhouse is divided into a heat absorbing region on the upper portion and a planting region on the lower portion, when temperature is high in the daytime, water mist is sprayed inside the heat absorbingregion, a lot of heat is taken away when the water mist is evaporated into steam, the low-pressure steam generated by evaporation is absorbed by high-pressure steam generated by a solar heat collection evaporator in a steam spraying pump, sprayed water mist condenses mixed steam in a condensing box, a lot of heat is released, then the mixed steam is mixed with the water mist to form high-temperature hot water, and the hot water passes through a transverse buried pipe heat exchanger and then conducts circulating heating on soil; when temperature is low at night, a gravity heat pipe can bring heat stored in the soil into the planting region, in this way, wheat can grow at suitable temperature in the whole day, illumination resources can be stored in day time and utilized at night, and efficient circulation is realized.

The invention discloses a tagging method for sparidae fish. The method comprises selecting fish, temporary rearing before tagging, anaesthetizing, disinfecting and temporary rearing after tagging. According to the invention, through operations such as selecting T-type labels, anaesthetizing before tagging and tagging muscles at front part under dorsal fin base, the survival rate of tagged sparidae fish is increased to the most and the tagging shedding rate is reduced. the tagging method is simple and practical; the flow is clear; the efficiency and effect of tagging and releasing are greatly increased; the tag and releasing can be operated based on evidence; the tagging has less influence on the growth of tagged sparidae fish and the method is suitable for the tagging and releasing of sparidae fish.

The invention discloses a potable rectangular frame and a sterilizing method thereof. The rectangular frame comprises a frame body, and a locating base is arranged in the frame body; the sterilizing method comprises the following steps of (a) framing, (b) flushing and sterilizing, (3) compound sterilizing, (d) soaking for sterilizing and (e) washing and airing. The rectangular frame is simple in structure, placing plates can be placed in layers, the stability is high, the rectangular frame and the method are beneficial for increasing the survival rate of insects, the cleaning method is simplein operation, easy to control, comprehensive in sterilizing and thorough, no dead angles can be left, and it can be ensured that the rectangular frame is clean and contamination-free.

The invention discloses a method for cultivating environment-friendly and pollution-free leaf radishes, and belongs to the technical field of agricultural cultivation. The method includes 25-mesh white insect-proof net mulching; utilization of a black sunshade net; high-density seeding without thinning and three-time harvesting. The method has the advantages that pesticides can be omitted owing to 25-mesh white insect-free net mulching, so that the environment-friendly and pollution-free agricultural products can be produced; the germination rate and the emergence rate are increased owing to the sunshade net, and influence of scouring of rainstorms is relieved; owing to a process for high-density seeding without thinning and three-time harvesting, the acre yield is increased while the cost is saved, the frequency of supplying the products for markets is increased, duration of supplying the products for the markets is prolonged, and an acre benefit is increased; by the method for cultivating the environment-friendly and pollution-free leaf radishes, the acre benefit is increased by 600 yuan at least, and the method can be implemented easily and conveniently, is suitable for cultivating the leaf radishes, can be well received by production bases or growers and has an excellent popularization and application prospect.

The invention discloses a microbacterium PT3 with a protein degradation function and application thereof. The preservation number of the microbacterium PT3 is GDMCC No: 60923. The microbacterium PT3 is separated from the intestinal tract of a prawn, and the proving result shows that the microbacterium PT3 can secrete protease extracellular, hydrolyze protein in a living environment, assist the microbacterium PT3 in utilizing the protein after being planted in the intestinal tract of an aquaculture animal, decompose the remaining protein in residual bait, synthesize the mycoprotein of the microbacterium PT3 for the aquaculture animal to use, and plant the microbacterium PT3 in the intestinal tract again to form a benign cycle and improve the feed protein utilization path. The microbacteriumand artemia survival experiments show that the strain does not generate stress or toxic effects on the aquaculture animal when the concentration is high; the strain is wide in tolerance, the salinityhas small influence on the growth of the bacterium, and the strain is very suitable for aquaculture and can efficiently play a role; and the microbacterium PT3 is of great significance in the marineaquaculture industry, can serve as a good strain of a novel microecological preparation and has good application prospects.

The invention discloses a method for managing environmental factors during Chinese onion seedling culture. The method comprises the steps of water management, light and temperature management, nursery soil management and weed management. Through precisely quantitative watering, water shortage during Chinese onion growth is effectively prevented. Through normalized light and temperature management, the Chinese onion growth environment is controlled strictly, illumination is utilized to the maximum extent, temperature and moisture suitable for growth and development of Chinese onion are maintained, the emergence rate is increased, and the occurrence rate of pest and disease damage is reduced. Through nursery soil management, photosynthesis is improved, the utilization rate of fertilizer is increased, growth of harmful bacteria is inhibited by means of other bacteria, and the morbidity of Chinese onion seedlings is reduced greatly. Meanwhile, through reasonable weed management, productivity is improved effectively, and the inhibition effect of weed on Chinese onion seedlings is reduced.