123results about How to "Inhibits water evaporation" patented technology

The invention discloses a desert control method of a chemical sand-fixing greening technology based on organic composite materials, and the desert control method is characterized in that hydrophilic polyurethane resin curing agent solution is sprayed on a sand or soil layer of greening objects for sowing the vegetation for forming a porous fixed sand layer. The fixed sand layer formed by the method has appropriate thickness and strength, good durability, good anti-freeze and melt properties and functions of water retention, thermal insulation, ventilation, vegetation and the like. According to the method of the invention, the stable and effective solidifying can be carried out on sand even under the specific desert environments of no abundant groundwater sources and strong wind erosion, and the purpose of vegetation greening can be also realized. The method has large-scale construction properties and good economic performances, thereby being applicable to the needs of large-scale chemical sand fixing and vegetation greening of the vast desert and realizing the plant greening function and the ecological restoration and the control of desertified land.

The invention discloses a method for planting cotton in coastal heavy saline-alkali land. The method comprises the following steps of: A, consolidating land, and building a strip field or a platform field; B, irrigating by using saline water in winter and icing; C covering by using a mulching film; D, sowing; E, performing growth period management; and F, picking in time after cotton bolls are fully cracked and opened. In the method, a series of measures such as land consolidation, icy irrigation of saline water in winter, ice melting spraying of saline water in spring, salt inhibition and soil moisture conservation through mulching film coverage and the like are adopted, so that the salt content of soil in cotton root layers is reduced, and the normal growth of the cotton is ensured; and the method is easy to operate and low in cost, can be applied to coastal saline and alkaline areas, and has remarkable economic, social and ecological benefits.

The invention relates to a degradable liquid mulching film and a production method thereof, particularly to an environment-friendly degradable liquid mulching film with straws as a basic raw material and a production method thereof. The degradable liquid mulching film is prepared from steaming slurry of crop straws (such as wheat straws, rice straws, cotton straws, wood shavings, and the like) or straws paper-making black liquor as a main raw material by a series of reactions, such as sulfonation, crosslinking and copolymerization, of macromolecules in the slurry or the black liquor, such as lignin, cellulose and polysaccharides, under the action of a film formation additive. The macromolecules in the degradable liquid mulching film have a large amount of hydrophilic groups which can effectively catch the water molecules evaporated and diffused from soil to the air, so as to prevent water evaporation and heat loss arising therefrom, thereby increasing the temperature and preserving soil moisture. The degradable liquid mulching film is helpful for increasing crop yield and improving crop quality; and the yield is higher than that by use of a plastic mulching film, and the per mu yield is increased by more than 5%. The degradable liquid mulching film can replace the conventionally used plastic mulching film.

The invention provides a multi-functional degradable liquid mulching film which comprises the materials with the following weight percentage: a polymer of polyether glycol-polyvinyl alcohol-polyaspartate: 15.0 percent to 40.0 percent, an emulsifier: 1.0 percent to 5.0 percent, a disperse speader: 0.5 percent to 5.0 percent, a pH value regulator: 0.1 percent to 5.0 percent, an antifreeze: 1.0 percent to 5.0 percent, and water as the rest; after the mulching film being watered and sprayed on soil surface, the macromolecules thereof are combined with soil particles and a layer of black curing film can be formed on the soil surface rapidly which can restrain the soil water from vaporizing and prompt the soil to absorb more solar energy, thereby improving the earth temperature. The liquid mulching film completely degrades into a humic acid organic fertilizer, water and carbon dioxide which can be absorbed by crops; the degradation products effectively accelerate the formation of soil grain clusters; and the number of grain clusters with water stability is increased by 10 percent to 15 percent and the volume weight of soil can be decreased by 5 percent to 10 percent. If sprayed on the surface of sandy soil, the liquid mulching film can effectively slow down the infiltration of the water to reserve water, thereby saving the water consumption of irrigation. The liquid mulching film can replace plastic mulching films in a certain range and has a certain social meaning and market prospect.

The invention discloses a coating antistaling agent for food. The coating antistaling agent is composed of the following components by mass: 5.0 to 10.0% of grape seed essential oil or fennel essential oil, 0.5 to 3.0% of ginger extract and 5.0 to 10.0% of glycerol monocaprylate or hydrophilic laurin, with the balance being a zein film raw material, wherein the mass percents of the above-mentioned components sum to 100%. The invention also discloses a preparation method for the coating antistaling agent used for food. The coating antistaling agent can effectively delay food oxidation, inhibit moisture evaporation, exert bactericidal effect, prolong the shelf life of food and reduce cost and is an edible coating antistaling agent without toxicity and pollution.

The invention discloses a method for planting beet in coastal heavy saline-alkali soil. The method comprises the following steps: A. arranging land, and building an elongated farmland or a raised field; B. irrigating and icing by salt water in winter; C. covering by a mulching film; D. culturing seedlings and transplanting; E. managing in a growth period; and F. harvesting when the beet is mature. According to a series of measures of arranging land, icing and irrigating by salt water in winter, melting and spraying by salt water in spring, covering by the mulching film, inhibiting salt, preserving soil moisture and the like, the salt content in soil of a beet root layer is lowered, and the beet can be guaranteed to normally grow. The method is simple to operate, has the advantages of low cost and obvious economic, social and ecological benefits, and is suitable to be applied in coastal saline-alkali zones; and by the method, the development of sugar manufacture and biological energy industry in China can be promoted.

The invention provides a preparation method of a straw pulp mulch film. The preparation method comprises the following steps that crop straws or herbages as raw materials are crushed and are then added with an agricultural water-retention agent, a thickening agent and a corresponding fertilizer according to an appropriate ratio to form turbid liquid-type straw pulp mulch film slurry comprising uniformly distributed slurry particles and having excellent rheological properties; and the turbid liquid-type straw pulp mulch film slurry is sprayed to coat the surface of soil thereby forming the straw pulp mulch film having effects of water retention and moisture conservation of soil. After decomposition, the straw pulp mulch film can improve soil fertility. In a validity period of the straw pulp mulch film, compared with the normally farmed farmland, a farmland adopted the straw pulp mulch film has an average soil water content improved by more than 2%. The straw pulp mulch film prepared from raw materials of crop straws has a material cost of about 300Yuan / ha, wherein the material cost is far less than a plastic mulch film material cost of 2800Yuan / ha. Under the conditions of good water-retention effects and wide raw material sources, use of the straw pulp mulch film has obvious superiority in cost and environmental protection. The preparation method is simple and operation is convenient.

The invention relates to the field of agricultural application, in particular to a multifunctional degradable liquid mulch film with macromolecule polymer as the main component and a preparation method and a usage method thereof. The mulch film comprises according to the weight percentage 2%-8% of polyvinyl alcohol, 2%-6% of carboxymethylcellulose sodium, 0.1%-0.5% of a crosslinking agent, 0.2%-0.5% of a defoaming agent, 0.3%-0.7% of glycerol and the balance of water. The mulch film provided by the invention is fully stirred with water and sprayed on the soil surface; the macromolecular hydrophilic groups can effectively combine with active sites on soil particles to form a crosslinking layer on the soil surface, so as to inhibit the moisture evaporation of soil and reduce soil erosion. The product has the effects of shortening seedling emergence time of crops, improving soil structure, promoting crop yield and avoiding pollution to the soil environment, can improve the shortage of agricultural water resources in semiarid area to a certain extent, and has broad application prospects.

The invention provides a high and steep slope protection and treatment method and a protection structure and relates to the technical field of ecological protection. The technical problem of soil dressing erosion caused by unreasonable protection structure design is solved. The high and steep slope protection and treatment method comprises the following steps of A, slope face cleaning, B, rivet fixing, C, net hanging, D, soil dressing spraying, E, seeding, F, grass blanket covering and G, local reinforcing anchor rod fixing. The protection structure comprises rivets, a hanging net, an anchor rod, soil dressing, seeds and a grass blanket which are arranged on a to-be-treated slope sequentially from bottom to top. One layer of grass blanket is laid outside the soil dressing, the effect of scouring resistance of the soil dressing is achieved perfectly, the grass blanket is degraded in 3-5 years, the scouring resistance and pull resistance of the grass blanket are high, water evaporation can be restrained, water is preserved, microenvironment is created for vegetation growth, and the plant survival rate is increased.

A face mask paper of collegen is prepared through dissolving collegen in deionized water, stirring at 20-35 deg.C, mixing cellulose carboxymethyl cellulose with deionized water, stirring, slowly adding the aqueous solution of collegan, stirring for 20-30 min, adding at least one of propanetriol, propanediol and butanediol, stirring for 20-30 min, moulding, and drying at 70-105 deg.C.

The invention relates to a high-yield cultivation method for honeysuckles in low mountains and hills. The method includes the key technical steps such as variety selection, raising of seedlings by cutting, digging of planting holes, base fertilizer application and planting, covering of mulching films, pruning, integrated control of plant diseases and insect pests and topdressing. The method is characterized in that growth and development of plants of the honeysuckles are obviously promoted, the time limit ahead of the high-yield period is shortened, the yield of the honeysuckles is improved, and the quality of the honeysuckles is guaranteed. Compared with an ordinary planting method, the high-yield cultivation method enables the yield in the first year after transplant to be promoted by 56.7%, the yield in the second year after the transplant is promoted by 87.3%, and the yield in the third year after the transplant is promoted by 116.6%. However, no obvious changes happen on the content of chlorogenic acid of the honeysuckles and contents of galuteolin of the honeysuckles, the content of the chlorogenic acid of the honeysuckles and the content of the galuteolin of the honeysuckles all meet the standard provisions of <pharmacopoeia of the people's republic of China> (2010 version), and social benefits, economic benefits and ecological benefits are remarkable.

The invention provides a special weather-resisting functional mulching film capable of being used for two years. The special weather-resisting functional mulching film is prepared from the following raw materials in percentage by weight: 60-80% of LLDPE (Linear Low Density Polyethylene), 5-15% of LDPE (Low-Density Polyethylene), 3-8% of HDPE (High-Density Polyethylene), 5-15% of mPE (Metallocene Polyethylene) and 2-6% of anti-ageing master batch. The anti-ageing master batch is prepared from the following raw materials in percentage by weight: 35-45% of LLDPE powder, 25-35% of the LDPE, 6-15% of the HDPE, 5-12% of the mPE, 2-7% of a hindered amine light stabilizing agent, 0.5-3.5% of an antioxidant, 0.5-3.5% of an ultraviolet absorber and 1..5-5.0% of dispersing agent white oil. The special weather-resisting functional mulching film can meet the requirements of 'one film with two-year service life' of the weather-resisting functional mulching film and can be used for 12-18 months; and compared with the common mulching film, the culture under-glass increased production reaches to 30-40%, so that the stable agriculture is realized and the good supply is guaranteed.

The invention belongs to the field of commodities for daily use, and particularly relates to a spraying mask containing gellan gum. The spraying mask provided by the invention also contains monovalentcation salt and divalent cation salt; the spraying mask formed by compounding the gellan gum, monovalent cations and divalent cations can form a gel mask with moderate hardness, so that the defect that the produced gel mask is too hard when the divalent cations are compounded with the gellan gum is overcome. In addition, the spraying provided by the invention also contains a plurality of humectants and anti-allergy agents; the formed spraying mask has the effects of resisting inflammation, resisting allergy and preserving moisture, and meanwhile, has a good skin feeling.

The invention provides a preparation method of a concrete water evaporation inhibitor. The obtained concrete water evaporation inhibitor is uniform in particle size and difficult in layering, and a use quantity of an emulsifier can be reduced. The preparation method comprises the following steps of preparing components of the concrete water evaporation inhibitor, wherein the components include C15 to C20 long chain alcohol, the emulsifier, water and selectable thickener and antifoaming agent; mixing the long chain alcohol, the emulsifier and water for pre-emulsification; in a state that the long chain alcohol is completely molten, carrying out high-speed shearing emulsification at a temperature above 40 DEG C, wherein mass of the water for pre-emulsification is 15 percent to 50 percent of all water consumption in the components; then rapidly adding the rest of water with a temperature of 5 to 30 DEG C in 1min, and carrying out high-speed shearing stirring to uniformly mix the components; selectably continuing to add the thickener and the antifoaming agent, and uniformly mixing to obtain the concrete water evaporation inhibitor.

The invention discloses a shaping cultivation method for mulberries. The shaping cultivation method comprises the following steps: greenhouse selection, soil preparation and film mulching, seedling selection, cultivation density selection, shaping and pruning, soil management, water management, nutrition management as well as disease and insect pest prevention and control. By using the shaping cultivation method for mulberries, the problems of no benefits for ventilation and picking inconvenience caused by high density and low tree trunk of the mulberries obtained by using the traditional mulberry cultivation mode can be solved, the yield of the mulberries can be increased, and the quality of fruits can be improved. The shaping cultivation method has the advantages of low resource consumption, beauty, picking convenience, high quality, high yield and the like, breaks through the limit of the traditional cultivation concept, not only achieves a higher landscape benefit, but also generates an objective economic benefit and has important significance for the development of the mulberry industry.

The invention provides a water retention agent and the application thereof in jatropha curcas forestation in arid-hot river valleys, pertaining to the technical field of plant growing. The invention comprises cultivation plots selecting, ponds digging, applying of the water retention agent and field plating. The Chinese commodity name of the water retention agent of the invention is Tudihanbaobei water retention agent, the cultivation plot is barren mountains and barren slope lands without water conservancy and irrigation; field planting is conducted in May to October, the rain season; the size of the dug planting pond is 80 cm multiplied by 80 cm multiplied by 80 cm <3>; base fertilizer comprising 2 kg to 4 kg of well-rotted farmyard manure, 0.5 kg of calcium superphosphate and 0.5 kg of potassium sulfate is fertilized in each planting pond and a nursery stock is placed in the planting pond, 20 g to 30 g of water retention agent granules are put at the root of the nursery stock and then the soil is backfilled in the planting pond. The application of the water retention agent of the invention solves the problem of the low survival ratio of forestation in arid-hot river valley areas by adopting the traditional method of jatropha curcas artificial forestation; utilization of the invention can ensure that the survival ratio of jatropha curcas forestation in arid-hot river valleys reaches 95 percent to 98 percent, raising by 22.22 percent compared with the contrastive survival ratios on average, thus improving the yield and the benefit of forest lands.

The invention discloses a foodstuff fresh-keeping agent, which is prepared from the raw materials of (by weight ratio) Pyrrolidine Carboxylic Acid Na 60-80%, beeswax 5-15%, edible starch 15-30%, trace quantity of sucrose ester and edible conservative. The agent can be applied to vegetable, fruits, fresh flowers, seafood product and meat products.

The invention belongs to the technical field of agricultural materials, relates to the field of edible fungus cultivation supplies, and particularly relates to a biomass water-retaining agent suitable for mushroom fungus sticks and a preparation method and application. The biomass water-retaining agent is prepared by use of green safe polymer polyvinyl alcohol as a base film forming agent and adding of the appropriate amount of carrageenan, glycerin and sodium tripolyphosphate, by dip-coating of the mushroom fungus sticks with the prepared biomass water-retaining agent, a layer of translucent protective film is formed on the surface of the mushroom fungus sticks, the protective film is a water-retaining film, and can replace a plastic film, when in fruiting time, manual cutting is not needed, mushroom buds in the mushroom fungus sticks can burst by themselves the water-retaining film without affecting the use of other regional water-retaining film, the fruiting body deformity can be effectively avoided, the flower mushroom quality can be improved, labor input and environmental pollution governance can be reduced, and the food safety problem during mushroom growth can be avoided.

The invention relates to the field of agricultural liquid mulching films, and discloses a black liquid fertilizer mulching film and a method for preparing the same.The black liquid fertilizer mulching film comprises asphalt, seaweed concentrated liquid, polyvinyl alcohol, carboxymethyl celluloses, silk protein powder, oxygen producers, inorganic fertilizer particles, alkyl diamine, tween and water.The method includes heating the asphalt until the temperature of the asphalt reaches 150-190 DEG C and stirring the asphalt; adding the seaweed concentrated liquid, the polyvinyl alcohol, the carboxymethyl celluloses, the silk protein powder, the oxygen producers, the inorganic fertilizer particles, the alkyl diamine and the tween into the water, uniformly stirring the seaweed concentrated liquid, the polyvinyl alcohol, the carboxymethyl celluloses, the silk protein powder, the oxygen producers, the inorganic fertilizer particles, the alkyl diamine and the tween and heating the seaweed concentrated liquid, the polyvinyl alcohol, the carboxymethyl celluloses, the silk protein powder, the oxygen producers, the inorganic fertilizer particles, the alkyl diamine and the tween until the temperatures of the seaweed concentrated liquid, the polyvinyl alcohol, the carboxymethyl celluloses, the silk protein powder, the oxygen producers, the inorganic fertilizer particles, the alkyl diamine and the tween reach 45-65 DEG C; uniformly mixing materials prepared at the steps 1) and 2) with one another and then grinding the materials to obtain the black liquid fertilizer mulching film.The black liquid fertilizer mulching film and the method have the advantages that excellent film-forming effects can be realized by the black liquid fertilizer mulching film on earth surfaces after the black liquid fertilizer mulching film is used, soil structures can be improved, outstanding water retention, heat preservation and soil moisture preservation effects can be realized, and the black liquid fertilizer mulching film is easy to degrade and has functions of increasing fertilizers and promoting growth of root systems of crops.

The invention relates to a fresh-keeping processing preparation for fruits, vegetables and flowers and a preparation method thereof. The preparation is a microemulsion prepared from a wax substance, an auxiliary agent, 2-aminoethoxyvinlglycine, an emulsifier, a bactericide and water. When the microemulsion is sprinkled on fruits, vegetables and flowers, the fruits, the vegetables and the flowers hardly deform because of dehydration and hardly wither, can maintain freshness and have prolonged life vitality, and the shelf values of the fruits, the vegetables and the flowers are increased.

The invention relates to a chitosan-based plant leaf surface water evaporation retardant and a preparation method thereof. A chitosan-based sol-gel system, namely, the retardant for retarding the plant leaf surface water evaporation rate, is prepared from carboxymethyl chitosan, gelatin and sodium beta-glycerophosphate through compounding. The preparation process is simple, the prepared sol system is sprayed to leaf surface, a colorless and transparent sol film layer can be formed rapidly through self-spreading, the environment temperature rises in summer, the sol film layer is changed into a thin gel layer, water can be locked by a three-dimensional network structure of gel, and leaf surface water evaporation is retarded. The chitosan-based plant leaf surface water evaporation retardant can effectively prolong the retention time of the water on the leaf surface and especially has good application feasibility in high-temperature drought regions in northwest. If the retardant is combined with a pesticide for application, the action time of the pesticide can be prolonged greatly, the action intensity of the pesticide is enhanced, and the retardant has great application value in decrement and synergism of the pesticide.

The invention discloses novel potted nutrition soil which comprises the following raw materials in parts by weight: 10-20 parts of lake silt, 5-15 parts of attapulgite clay, 12-23 parts of plant straws, 11-17 parts of decomposed bean curd residues, 8-20 parts of dry cow dung, 8-15 parts of plant ash, 10-25 parts of coniferous soil, 10-20 parts of chitosan, 9-16 parts of fermented orange peel residues, 8-14 parts of saw dust, 9-18 parts of biogas residues, 5-10 parts of sepiolite, 2-3 parts of quick lime, 1-2 parts of potassium permanganate, 11-22 parts of a nutrient solution and 1-2 parts of active microorganisms. The novel potted nutrition soil disclosed by the invention is rich in nutrient substance, good in water and fertilizer retaining properties, good in gas permeability, low in cost, convenient to use and capable of long-term storage.

The invention discloses a preparation method of high performance concrete curing agent. The method is characterized in that the curing agent is formed by polymerizing the free radical of monomer containing unsaturated double bond through free radical evocating agent at 60 to 90 degrees centigrade in organic solvent system, the content of the organic solvent in a reaction system is 50 percent to 90 wt percent, the sum of the content of the monomer containing the unsaturated double bond and the free radical evocating agent is 10 to 50 wt percent in the reaction system and the free radical evocating agent accounts for 0.2 percent to 2wt percent of the content of the unsaturated double bond monomer. Polymer solution prepared through the invention can form a compact film on the surface of the concrete and effectively restrain the moisture evaporation of the surface of the concrete. The suppression efficiency can reach 95 percent. The invention has the advantages of simple preparation technology, stable performance, convenient field use and the like and has great significance on preparing the high performance concrete.

Disclosed is a method for raising seedlings by cutting on micro-propagation films of fast-growing poplar in saline-alkali soil regions. The method includes measures of a series of technical links such as soil improvement, shearing and processing for cutting slips of the poplar, bed making and film mulching, a hard wood cutting technology implemented on the films, control for cutting time and density and nurse and management for the seedlings. The method for raising the seedlings by cutting has the advantages that terrestrial germination and shooting and subterraneous rooting are taken into consideration, requirements of the terrestrial germination and shooting and requirements of the subterraneous rooting are respectively met, and benefits of the terrestrial germination and shooting and benefits of the subterraneous rooting are respectively realized; after two years of tests for raising seedlings and investigation and analysis, effects of the method for raising the seedlings are obviously improved, a survival rate of the seedlings reaches 95% at least, the seedlings are complete and strong, and heights of one-year seedlings range from 3.5 meters to 4 meters; growing periods of the seedlings are prolonged by nearly a month; salt suppressing and water saving effects are obvious; the nurse and management frequency is reduced; the seedling raising cost is greatly reduced; and a survival rate of afforestation is obviously increased.

The invention relates to a water-retaining agent and a preparation method, specifically to a water-retaining agent containing aloe gel and a preparation method thereof. The water-retaining agent is prepared from the following raw materials (by weight): 3-10 parts of aloe gel, 10-20 parts of humus, 50-70 parts of plant fiber, 10-20 parts of starch, 2-3 parts of ferric sulfate, 25-35 parts of acrylic acid, 7-15 parts of acrylamide, and 80-120 parts of 27-37% aqueous alkali. The water-retaining agent provided by the invention is environment-friendly, has advantages of simple process and strong water retaining capacity, and can provide nutrients essential for growth of plants, and has effects of fixing sand and preserving water and improving soil.

The invention provides a novel special liquid fertilizer for rice capable of comprehensively controlling plant diseases and insect pests, and a preparation method thereof. The novel special liquid fertilizer is prepared from the following components: 5 to 15 parts of urea-ammonium nitrate solution, 5 to 15 parts of ammonium polyphosphate solution, 5 to 10 parts of potash fertilizer, 0.1 to 2 parts of microelement, 20 to 50 parts of water, 1 to 10 parts of homemade plant pesticide extracting solution, 1 to 2 parts of soil conditioner, 1 to 5 parts of natural activity organic materials, and 1 to 5 parts of natural surfactant, wherein the homemade plant pesticide extracting solution is prepared from mixing trifolium pratense, folium artemisiae argyi, herba houttuyniae, semen persicae and black false hellebore in proportion, and extracting with water. The preparation method comprises the steps of adding the prepared urea-ammonium nitrate solution and the ammonium polyphosphate solution in proportion according to a formula into a mixing tank; then adding the other metered materials into the mixing tank; stirring, dissolving and filtering to prepare the liquid fertilizer. The liquid fertilizer provided by the invention is convenient to use and good in effect, and is a special multi-functional environment-friendly liquid fertilizer for the rice.

The invention discloses nutrient soil for peanut seedling culture and relates to the technical field of planting. The nutrient soil is prepared from, by weight, 150-170 parts of sandy soil, 50-60 parts of humus, 20-25 parts of coconut residuum, 15-20 parts of hemp stalk ash, 15-20 parts of tea seed cakes, 15-20 parts of palm oil, 12-17 parts of bagasse, 10-15 parts of modified zeolite powder, 10-15 parts of plant starch, 7-11 parts of traditional Chinese medicine residues, 5-8 parts of vinasse, 5-8 parts of pine needle meal, 4-7 parts of sea-foam stone powder, 3-5 parts of vinegar residues, 3-5 parts of nano-zinc oxide, 2-4 parts of polyacrylamide and 2-3 parts of cane molasses. The nutrient soil prepared through the method is loose and fertile, the phenomenon of soil hardening is avoided after the soil is used, the requirement for nutrition of peanut seedling culture can be fully met, the nutrient soil is safe, environmentally friendly and free of toxin and smell, young peanut seedlings cannot be polluted, and quality of peanut fruits is not affected.

The invention discloses a method for producing bulb and controlling florescence by utilizing effective accumulated temperature in tulip growing period, wherein the method for producing bulb by utilizing effective accumulated temperature in tulip growing period comprises the steps of determining the effective accumulated temperature at the tulip growing period; selecting a low temperature semi-arid climate type area that has an average temperature of 12-16 DEG C and a dryness fraction of 2-3 in July as the production base on the basis of determining the effective accumulated temperature at the tulip growing period; planting the tulip to control the tulip stem and leaf coverage between 95-100%; and covering the organic matter 3-5cm thick. After grasping the effective accumulated temperature at the growing period of the cultivar and the set temperature when planting, namely the temperature of tulip at growing period, calculate the accurate blossom date by the following formula: N=K / (T-C).

The invention provides ultrahigh-performance concrete, an ultrahigh-performance concrete cored slab and a preparation method thereof and belongs to the technical field of concrete members. The ultrahigh-performance concrete comprises the following components in parts by weight: 20-30 parts of Portland cement, 3-8 parts of silica fume, 3-8 parts of coal ash microspheres, 20-30 parts of medium sand,20-30 parts of fine sand, 4-7 parts of steel fibers, 5-7 parts of water, 0.5-1 part of water reducing agent, 0.5-1 part of anti-cracking and toughening agent and 0.5-1 part of defoaming agent; and the water reducing rate of the water reducing agent is 35% or above. Due to the adoption of the components and ratios, the gap of the ultrahigh-performance concrete can be minimized, furthermore, waterin the gap can be favorably extruded, the flowability of the concrete is improved, and the ultrahigh-performance concrete can be used for pouring a cored slab.

The invention discloses a fresh bamboo shoot fresh-keeping film coating agent and a preparation method thereof. The invention relates to the technical field of fruit and vegetable preservation, the film coating agent comprises the following raw materials in parts by weight: 10-20 parts of chitosan, 5-8 parts of tartaric acid, 5-10 parts of soy isolate protein, 3-5 parts of stearic acid, 5-12 partsof porous starch, 3-5 parts of polylysine, 0.5-1.5 parts of nano montmorillonite and 1-5 parts of mint essential oil microcapsules; tea polyphenol is loaded on the nano montmorillonite, and beta-cyclodextrin serves as a capsule wall material of the mint essential oil microcapsules. The fresh bamboo shoot fresh-keeping film coating agent is low in cost, simple and easy to use, good in film-formingproperty, non-toxic and edible; the formed film layer can continuously and effectively inhibit moisture evaporation of the fresh bamboo shoots, delay respiratory metabolism and resist pathogenic microorganisms, the hardness and lignin of the fresh bamboo shoots are increased a little, the water loss rate is low, the color and smell of the fresh bamboo shoots can be effectively protected, and thefresh-keeping time of the fresh bamboo shoots is prolonged.