244results about How to "Strong salt tolerance" patented technology

The invention discloses a foam profile control system suitable for advanced profile control of an oilfield. A liquid of the system is prepared from a first surfactant, a second surfactant, granules, a foam stabilizer, a polymer, a crosslinking agent, a stabilizer, an adjustor, inorganic salt, a control agent and water. The foam profile control system has three characteristics of foam, gels and granules at the same time, and has a strong deep sealing capacity to a high-permeability oil layer, namely, has an effect on expanding the swept volume. The system further can reduce the oil-water interface tension, and mainly exerts a gel performance at a low-permeability layer and a foam property at a high-permeability layer, that is, the system has the effects on improving the oil dispelling efficiency and selectively plugging water. When the system is used, as gases exist, the use level of the foam profile control system is reduced, and the foam profile control system has the characteristics of temperature resistance and salt resistance at the same time.

The invention discloses a coastal kaline soil forestation method, comprising the following steps: A. trenching and building ridges, and building rain collection beds; B. setting rain collection surfaces; C. digging plant pits, and setting salt isolation layers; D. collecting tree species and planting; E. setting surface cover layers of plant pits; F. tending, and weeding at proper time; wherein, the step of trenching and building ridges, and building rain collection beds is based on the design of forestation spacing, and flow collection trenches are dug at interval of a row spacing along the direction of rows; the depth of the trench bottom is 20cm to 25cm; the ground surface between the ridge and the trench bottom is trimmed to form a shallow v-shaped groove; the sloping surfaces are leveled and compacted to form the rain collection beds. The coastal moderate kaline soil forestation technology of the invention greatly increases the water content of soil, and the salt is efficiently leached and reduced, thereby efficiently improving the survival rate, save rate and growing speed of forests; the survival rate of forests reaches greater than 85%.

The invention relates to paracoccus sp. and a culture application thereof. The strain is paracoccus sp. FSTB-2, collected at 'China General Microbiological Culture Collection Center' on June 1, 2015, and the preservation number is CGMCC No. 10938. The strain can be applied to efficiently removing COD (chemical oxygen demand) in salty wastewater with salt content of 1.0wt%-8.0wt%, and can grow at the high temperature of 40 DEG C. The invention further provides COD removing salt-tolerant bacteria which comprise the paracoccus sp. FSTB-2. The COD in the high-salt wastewater can be rapidly degraded by the paracoccus sp., the paracoccus sp. is high in salt resistance and good in treatment effect, combining strains are omitted, and the production cost of the salt-tolerant bacteria is greatly reduced.

The present invention relates to a method capable of implementing on-target one-step desalination and enrichment of trace protein or polypeptide by means of combined application of hydrophobic polymer microblotting technique and matrix auxiliary laser analysis ionization mass spectrography. Said microblotting hydrophobic polymer has good adsorption and enrichment effect for protein and polypeptide, so that it can implement one-step desalination and direct MALDI-TOF-MS analysis. Said invention can be extensively used in the field of protein phylogeny.

The invention discloses a method for the in-situ anaerobic digestion treatment of kitchen garbage, which relates to a kitchen garbage treatment technology. The anaerobic digestion treatment of the kitchen garbage after collection, sorting and pulverization is carried out to acquire marsh gas and digested residues capable of being used for restaurants, and residues are then separated and dried through a centrifuge to acquire available feed. The sludge in a plant anaerobic digestion cell is used as a substrate of an inoculant, and the kitchen garbage is used for domestication, thereby effectively utilizing the microbial flora in the substrate; meanwhile, the habit of the inoculant and the character of the kitchen garbage can be matched through domestication, thereby being beneficial to quickly starting a digester. The method is suitable for the in-situ treatment of the kitchen garbage in community centers of various large and medium restaurants, schools, hospitals and the like.

The invention discloses a suppository composition with improved performance. The suppository composition comprises an aliphatic suppository substrate, mono-capryl-based glycerin, mono-lauroyl-based glycerin, polyoxyethylene, a suppository substrate of which the molecular structure contains polyethylene glycol and alkyl having 8 to 24 carbon atoms and a suppository medicament. The suppository composition has the advantages of improving production repeatability and retention value otherness, enhancing the function of a cavity administration retention substrate, improving stability, namely, changing melting performance, decreasing medicament releasing rate and solving or relieving problems such as scumming and the like, improving medicament releasing performance, increasing liquefaction or gelling speed and achieving stronger salt resistance and acid resistance and higher biocompatibility and the like.

A black reactive dye composition is characterized in that: based on the total weight, the black reactive dye composition comprises 30-90wt% of component A, 0-36wt% of component B, 0-30wt% of component C, 0-25wt% of component D and 0-45wt% of auxiliary agent, wherein the component A comprises at least one of compounds shown in formula (I), the component B comprises at least one of compounds shown in formula (II) or compounds shown in formula (III), the component C comprises at least one of compounds shown in formula (IV), and the component D comprises at least one of compounds shown in formula (V) or formula (VI). The black reactive dye composition is suitable for printing and dyeing of cotton, artificial cotton, hemp, regenerated fiber or textiles thereof, or printing and dyeing of polyamide fiber, cellulose fiber, protein fiber or textiles thereof, is particularly suitable for printing and embossing of the artificial cotton, has excellent wash fastness and perspiration fastness and can ensure a good hand feel of textiles.

The invention discloses a high-performance wickerwork coating which is prepared from the following components: waterborne polyurethane, silicon-acrylate emulsion, dioctyl phthalate, shellac resin, mung bean starch, polyvinyl alcohol, a filler, an antibacterial additive and water. Compared with the existing wickerwork coating, the wickerwork coating disclosed by the invention is high in storage stability and long in coating film service life; compared with the coating film service life of the common wickerwork coating, the coating film service life of the high-performance wickerwork coating is prolonged by twice or triple; a paint layer formed by the coating is touch, high in brightness, high in adhesive force, anti-acid, anti-sulfur, high in salt resistance, stable in performance, and not liable to corrode and discolor; the coating disclosed by the invention is extremely high in high-temperature resistance, high in adhesive force, and not liable to fall off; furthermore, during use, the coating can be quickly dried and is high in leveling property; moreover, the coating is harmless to the environment and a human body, and is environment-friendly.

The invention provides a high-temperature-resistant and high-salt-resistant oil reservoir profile modifying water plugging agent and a preparation method thereof. The high-temperature-resistant and high-salt-resistant oil reservoir profile modifying water plugging agent comprises a suspension and plugging agent particles, wherein the plugging agent particles take an inorganic silicon material as an inner core, a thermal-swelling crosslinked resin membrane as an inner layer covering membrane, and a rigid resin protective membrane as an outer layer covering membrane; the inner layer covering membrane covers the inner core, and the outer layer covering membrane covers the inner layer covering membrane; and the suspension comprises water, guanidine gum and sodium borate. The invention also provides the preparation method of the profile modifying water plugging agent, and the preparation method comprises the following steps: covering the inner layer covering membrane on the surface of an inner core raw material, and after a needed thickness is reached, covering the outer layer covering membrane on the surfaces of particles covered with the inner layer covering membrane to obtain plugging agent particles; dissolving the guanidine gum in water, then adding the plugging agent particles, and stirring; and adding the sodium borate to obtain the high-temperature-resistant and high-salt-resistant oil reservoir profile modifying water plugging agent. The high-temperature-resistant and high-salt-resistant oil reservoir profile modifying water plugging agent provided by the invention is good in plugging effect and causes small damages to a reservoir stratum.

The invention provides a high-efficiency identification method for salt resistance of cotton germplasms. By utilizing a flower pot soil seedling cultivation method, cotton seedings are cultivated to a three-leaf-and-one-leaflet stage. The materials with normal and consistent growth vigour are selected and subjected to salt stress treatment and clear water treatment with the same volume respectively. The second true leaves are selected, the PSII maximum photochemical efficiencies of the true leaves with different treatments are measured respectively, the relative values are calculated, and brought into the standard equation of salt resistant indexes: D=1.943X-0.882 to calculate the salt resistant indexes and determine the salt resistance, wherein X is for a relative value of a PSII maximum photochemical efficiency and D is for a salt resistant index. The larger the salt resistant index, the stronger the salt resistance. When the method is compared to the prior art, the results of the obtained standard equation of the method are accurate and credible. The measurement method of PSII maximum photochemical efficiencies is simple and fast, can be performed in vivo, does not harm plants, and can ensure normal running of downstream experiments. The measurement time is the cotton seedling stage, so the identification time can be shortened effectively, the efficiency is raised, and the method is suitable for large scale germplasm resource identification.

The invention provides an ionic liquid type heavy oil viscosity reducer prepared by utilizing a microorganism surface active agent and a preparation method, and relates to the technical field of petrochemical engineering. The ionic liquid type heavy oil viscosity reducer is prepared from the following components of, in percentage by mass:, 30-80% of ionic liquid type lipopeptid, 0.5-5% of an anionic surface active agent, 0.5-10% of a nonionic surface active agent and the balance of ionic liquid. By utilizing a surface active agent ionic liquid type lipopeptid solution formed through microorganism fermentation, the heavy oil viscosity reducer is prepared through a combination method, compared with an existing chemical viscosity reducer, the ionic liquid type heavy oil viscosity reducer hasphysicochemical properties of ionic liquid while having relatively high characteristics of salt tolerance, high temperature resistance, and effectively reducing the oil-water interfacial tension and surface tension, and can be applied to the conditions with a wide temperature range, the physicochemical stability is high, the heavy oil viscosity reducing effect of the ionic liquid type heavy oil viscosity reducer can reach 80%-95%, and the heavy oil viscosity reducer is safe and environmentally friendly, simple and convenient in configuration and high in operability.

The invention relates to a method for treating kitchen wastes by utilizing photosynthetic bacteria and recycling the kitchen wastes. The method particularly comprises a kitchen waste pretreating method which includes carrying out hydrolysis acidification treatment on the kitchen wastes until the concentration of volatile fatty acid is up to be 5000-15000mg / L to obtain hydrolysis acidification liquid, performing solid and liquid separation on the hydrolysis acidification liquid, adjusting the pH value of the liquid to be 6.5-7.5 to obtain a pretreated material, and a method for culturing the photosynthetic bacteria by using the pretreated material, which comprises the following steps of: inoculating 100-1000mg / L of a photosynthetic bacteria flora in the pretreated material and culturing the photosynthetic bacteria flora for 3-5 days under conditions that the illuminance is 1500-5000lux, the temperature is 25-35 DEG C and the dissolved oxygen concentration is 0-0.8mg / L. A product obtained by using the method can be used for preparing feed additives, water purification agents, ecological organic fertilizers or aquaculture baits. The method is strong in poison resistance capability for treating the kitchen wastes, good in denitrification and high in organic matter removal capability.

The invention provides a compound alga oligosaccharide microbial fertilizer and a preparation method thereof and relates to a microbial fertilizer. The compound alga oligosaccharide microbial fertilizer is prepared from, by volume, an alga oligosaccharide solution 20%-80% and bacillus mucilaginosus fermented liquid 20%-80%, wherein the effective number of living bacteria is greater than or equal to 0.2 billion / mL, the alga oligosaccharide content is greater than or equal to 0.5 g / kg, and a pH value is 6.8-7.2. The preparation method comprises the steps that bacillus mucilaginosus is activated by using a solid nitrogen-free culture medium and then is inoculated to a seed culture medium to obtain primary seed fermentation liquid; the primary seed fermentation liquid is inoculated to a seed fermentation tank, and culture is performed to obtain secondary seed liquid; the second seed liquid is inoculated to a fermentation culture medium, and fermentation culture continues to prepare the bacillus mucilaginosus fermented liquid; the alga oligosaccharide solution and the bacillus mucilaginosus fermented liquid are mixed to obtain the compound alga oligosaccharide microbial fertilizer. The compound alga oligosaccharide microbial fertilizer has the effects of improving soil, improving fertilizer efficiency, adjusting crop growth, improving crop quality and the like.

The invention relates to a Helianthus tuberosus variety breeding method, which belongs to the plant variety breeding technology field. The recyclable seawater stress cultivation is used, and the consistence of the seawater is set into six kinds of consistence: 0 percent, 10 percent, 25 percent, 50 percent, 75 percent, and 100 percent. Seawater is filtered repeatedly and systematically in the field, and the breeding object is the salt-resistant high-yield and high-quality. The south Helianthus tuberosus No.1 bred into after six generations grows strongly in the ratio of 3 to a thousand about salt soil, has strong salt resistant property and thick stalk, and has about ten branches 1m beneath the ground; the underground tuber has thin skin and more than ten bud eyes; the yield per mu is about 3000kg without pests. The dry weight of the tuber is 23-29 percent of the fresh weight. The variety has high yield, excellent quality, and strong salt resistance; can be cultivated in the coastal beach saline alkali soil or the inland saline alkali soil; can have broad application prospect in the fields of bio-energy plant material in our country, and can promote the development of related industries.

The invention relates to a surfactant for displacing oil and a preparation method. According to the invention, the preparation of the surfactant for displacing oil comprises the following steps: adding a residue sulfonate surfactant and polyoxyethylene octylphenol ether sulfonate into a mixing kettle; starting stirring with the increase of temperature to 45 DEG C; slowly adding isopropanol and water into the mixing kettle, followed by continuous stirring for 45 to 60 minutes; and carrying out cooling and discharging to obtain a surfactant for displacing oil. The surfactant for displacing oil comprises the following components by weight: 70 to 80% of the residue sulfonate surfactant, 10 to 15% of polyoxyethylene octylphenol ether sulfonate, 2 to 5% of isopropanol, and the balance being water. The surfactant for displacing oil provided in the invention enables the oil-water interfacial tension to be reduced to 10-3mN / m that is the lowest level under the high-temperature, high-salinity, and alkali-free condition; and a single surfactant for displacing oil enables the recovery efficiency to be improved by over 13.5%. Therefore, the surfactant for displacing oil has broad application prospects in tertiary oil recovery field of high temperature and high salinity reservoir.

The invention discloses a technology for preparing an agricultural drought-resistant water retaining agent, which belongs to the field of one of the agricultural drought-resistant water retaining technologies. The technology is mainly characterized by comprising the following steps of: initiating the polymerization of acrylic acid and acrylamide monomers by using a nanometer silicon dioxide-ammonium persulfate compound system under a low-pressure heating condition. The water retaining agent prepared by using the technology is quite strong in salt resistance (70-120 times in absorbing normal saline), and proper in water absorbency (300-500 times), can resist drought and retain water in soil, simultaneously does not compete for water with plants, does not harden, and therefore can be widely applied to the fields of agriculture and desertification control for drought resistance and water retaining.

The invention discloses a Bacillus alcalophilus SD 7903 with the preservation number of CGMCC No. 3158, belonging to the field of microbial technology; the invention also discloses a culture method thereof and an application in producing Ectoine. The Bacillus alcalophilus has higher Ectoine synthesis capability and is a strain of Gram positive bacteria, thus expanding biological resource utilization space and having good industrial application prospect in respect to production of Ectoine mainly by applying Gram negative bacteria in the current industry.

The invention relates to a one-step preparation method of amphoteric guar gum, belonging to the technical field of guar gum modification. The preparation method disclosed by the invention comprises the following steps: (1) adding a certain amount of chloroacetic acid to an amine aqueous solution at room temperature, and controlling the pH value to be 7-10 for reaction to prepare glycine hydrochloride; (2) dispersing the glycine hydrochloride and low-carbon alkylene oxide in a weak polar or non-polar solvent to be subject to a reaction at 50-70 DEG C to prepare an amphoteric intermediate; (3) adding raw guar gum powder to the weak polar or non-polar solvent at normal temperature, adding a basic catalyst to carry out basic catalysis; and (4) adding the amphoteric intermediate to be subject to an etherification reaction at a pressure of 0.05-0.33MPa, and collecting the amphoteric guar gum product from the reaction product. The prepared product has high ion interference resistance and salinity tolerance. Besides, the product can be used as a retention and drainage aid for paper making and achieves obvious effects and high paper formation. When the product is used as an intensifier, the dry strength of paper can be obviously improved, and the softness of paper can not be reduced.

The invention discloses a multifunctional thickened oil treating agent and a preparation method thereof. The treating agent is prepared from, by weight, 15.35%-17.65% of octanol polyoxyethylene ether, 13.37%-15.54% of lauroyl diethanolamide, 12.66%-15.74% of sodium dodecyl benzene sulfonate, 21.53%-24.57% of odium nonylphenol polyoxyethylene ether sulfate, 8.62%-11.87% of fatty acid methyl ester ethoxylate sodium sulfonate, 0.005%-0.006% of cocamidopropyl betaine, 0.005%-0.006% of cocamidopropyl dimethylamine oxide, 10.00%-15.00% of n-butyl alcohol, 0.001%-0.002% of vitamin A, 0.001%-0.002% of vitamin C and 6.566%-9.037% of water. The multifunctional thickened oil treating agent is an active agent product developed on the basis of tertiary oil recovery and used for increasing the recovery efficiency of an oil field, and the agent is a chemical assistant integrating oil well profile control and displacement, viscosity reduction and coagulation reduction, oil well cleaning and plug removal, and is good in production increasing effect on thickened oil recovery; the advantages of being good in thickened oil recovery oil output increase effect and treatment performance and wide in application range are achieved, and the yield increasing and effect improving functions on multiple kinds of thickened oil and high-viscosity and hypercoagulable oil wells can be achieved by adjusting the formula.

The invention relates to a microemulsion system and a preparation method thereof, in particular to a polyacrylamide microsphere system and a preparation method and application thereof. The microspheresystem is prepared through an emulsion polymerization reaction under the action of a composite initiator. The emulsion system comprises the following components in percentage by mass: 10%-60% of a monomer, 0.1%-3% of an organic salt, 3%-20% of an emulsifier, 0.01%-2% of a co-emulsifier, 0.01%-1% of a cross-linking agent, 0.001%-0.5% of an initiator, 0.001%-1% of a polymerization auxiliary agent,10%-70% of deionized water and 10%-50% of a non-polar solvent. The polymer microsphere system is used as an interface enhancer for emulsion flooding, can effectively improve the expansion modulus andshear modulus of an emulsion interface, and enhances emulsion stability; and after compounding polymer microspheres and a surfactant, a very good fluidity control effect is obtained and the profile control and flooding capacity of emulsion flooding is improved.

The invention discloses a salt-tolerant trichoderma pleuroticola strain and application thereof, belonging to the technical field of dephosphorization microbial fertilizers. The strain is trichoderma pleuroticola HF01 and has the collection number of CGMCC (China General Microbiological Culture Collection Center) No. 8127. The invention further discloses a microbial agent containing the strain and a preparation method thereof. Shown by experiments, the trichoderma pleuroticola strain disclosed by the invention has the characteristics that the growth speed is high, the spore yield is large, the salt tolerance is strong, the stress resistance is strong, the rapid and large-number colonization at the rhizosphere of plants can be achieved, and the like; the strain has broad application prospects in the aspects of increasing the phosphate fertilizer utilization ratio, improving the soil structure and increasing the yield and quality of crops.

The invention discloses zwitterionic hydrophobic modified guar gum which is characterized in that the structural formula of the zwitterionic hydrophobic modified guar gum is shown in the specification, wherein R1 is a long-chain organicacid, concretely a long-chain saturated acid with a carbon chain of 6-14 or a long-chain unsaturated acid with a carbon chain of 18-22. The invention also disclosesa preparation method of the guar gum. The preparation method comprises the following steps: introducing an anionic monomer into the guar gum to form an anionic guar gum modified product; preparing awater-soluble amphiphilic cationic hydrophobic monomer from hydrophobic long chain, 3-dimethylaminopropylamine and epoxy chloropropane; and introducing the water-soluble amphiphilic cationic hydrophobic monomer into the anionic guar gum modified product to form an amphoteric hydrophobic modified product. The special electrostatic interaction and hydrophobic association of zwitterions are fully utilized to endow the guar gum molecular chain with special dispersity and rheological property, so that the disclosed guar gum has excellent solubility, tackifying property, temperature resistance and salt resistance.

The invention relates to a Lactobacillus plantarum strain JP-8 and a process for fermentation of sea asparagus puree by the strain to prepare ready-to-eat crisp chips. The strain is preserved in China General Microbiological Culture Collection Center on September 29, 2013 with a preservation number of CGMCC No.8289. The employed technical scheme includes: (1) using am MRS culture medium to prepare a Lactobacillus plantarum JP-8 seed bacterial liquid; (2) pulping sea asparagus, inoculating the seed bacterial liquid, and conducting anaerobic fermentation; and (3) preparing sea asparagus ready-to-eat crisp chips by means of material mixing, material spreading in a tray, hot air drying, microwave vacuum drying, and nitrogen-filled packaging. Through fermentation by the Lactobacillus plantarum, the quality (nutrition, flavor, shelf life and the like) of the sea asparagus ready-to-eat crisp chips is improved. According to the invention, hot air drying and microwave vacuum drying technologies are adopted successively, while the taste of the crisp chips is improved, and the flavor and nutrients of sea asparagus are reserved to the utmost, the production cycle is shortened, the energy consumption is reduced, and the production cost is lowered.

The invention discloses halomona with an aerobic denitrification function, and application of the halomona. The halomona is collected in the China General Microbiological Culture Collection Center on17th September, 2019 with a collection number of CGMCC No.18499. The halomona can carry out aerobic denitrification nitrogen removal under a high-salinity environment and can comprise the following steps of: 1) preparing a high-salinity nitrogen-containing liquid culture medium, wherein salinity is 31; and 2) taking a halomona strain, inoculating the halomona strain in the culture medium accordingto an inoculum size a, and culturing for 24-48h under conditions of 90-150 rpm, 20-40 DEG C and pH of 7.0+ / -0.5, wherein a is greater than or equal to 1% and less than or equal to 3%. When the halomona is used for processing the nitrogen-containing waste water of seawater, a removal rate for NO3<->-N at 48h is 92%, a removal rate for TOC (Total Organic Carbon) and a removal rate for TN (Total Nitrogen) are independently 69.4% and 65.6%, and the halomona performs efficient nitrogen removal performance in high-salinity nitrogen-containing wastewater processing.

The invention provides sphingobium yanoikuyae with a function of degrading triphenyl phosphate. The bacterium is named YC-XJ2, has a preservation number of CGMCC No.18049, and enables 100mg / L TPhP ininorganic salt to be degraded by 99.7 percent in 24 hours. The sphingobium yanoikuyae strain YC-XJ2 has strong adaptability on temperature, can keep the degradation rate on TPhP at 95 percent at 40 DEG C, can keep the degradation rate on TPhP at 88 percent or more when the pH value is 4-10, has a degradation at 74.8 percent or more when the salt concentration is 0-10 percent, and shows extremely strong salt resistance. The strain can be applied to biological repairing of a TPhP polluted environment and has relatively good economic value and application prospect.

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 water absorbing and maintaining composite material consists of water soluble unsaturated ethylene monomer, sericite in the amount of 2-300 wt% of the ethylene monomer, and water soluble free radical polymerization initiator in the amount of 0.001-1 wt% of the ethylene monomer. The preparation process includes adding sericite into 5-50 % concentration water soluble unsaturated ethylene monomer solution with water soluble free radical polymerization initiator or water soluble free radical polymerization initiator and crosslinking agent, dispersing, heating to 20-90 deg,c for polymerization of 1-10 hr, drying of the polymerized product at 40-150 deg.c and crushing mechanically to obtain grain product. The water absorbing and maintaining composite material has low cost, high absorption to calcium and magnesium ion aqua and high salt tolerance, and is suitable for use in agriculture and forestry.

The invention discloses a method for planting alfalfa in saline-alkali soil. The method comprises the following steps: deep application of a base fertilizer, a sowing process, irrigation, field management, a clipping process and greenness returning management. According to the invention, the soil structure is improved and the salt content of soil is reduced through soil preparation and deep application of the humic acid organic fertilizer. At the same time, a low-salinity environment is created in the germination period of alfalfa seeds by utilizing a drip irrigation mode, so that the seed germination and the seedling growth are promoted. Winter water for irrigation penetrates through a cultivation layer, so that the icing caused by water accumulation on the ground is avoided, and topdressing is carried out with the combination of irrigation by greenness returning water. In addition, a saline-alkaline-resistant alfalfa variety is selected as a recommendation variety, and the planting success rate is further improved. According to the method provided by the invention, the organic matter content of soil is increased before the alfalfa is planted, the disadvantages to the alfalfa germination and seedling growth caused by increased the salinity of dry soil in spring are overcome through the utilization of the drip irrigation method, conditions are created for normal growth of the alfalfa in the later stage, and the technical support for the production of high-quality alfalfa and the development of animal husbandry in saline-alkali areas is provided.

The water absorbing and maintaining composite material consists of water soluble unsaturated ethylene monomer, illite-clay mineral in the amount of 2-300 wt% of the ethylene monomer, and water soluble free radical polymerization initiator in the amount of 0.001-1 wt% of the ethylene monomer. The preparation process includes adding illite-clay mineral into 5-50 % concentration water soluble unsaturated ethylene monomer solution with water soluble free radical polymerization initiator or water soluble free radical polymerization initiator and crosslinking agent, dispersing, heating to 20-90 deg,c for polymerization of 1-10 hr, drying of the polymerized product at 40-150 deg.c and crushing mechanically to obtain grain product. The water absorbing and maintaining composite material has low cost, high absorption to calcium and magnesium ion aqua and high salt tolerance, and is suitable for use in agriculture and forestry.

The invention provides a preparation method for a polyether type organosilicone-modified fat-liquoring agent for leather, which is prepared by taking quadrol-modified rap oil, acrylic acid, sodium bisulfate, and polyether type organic silicone oil as raw materials through a blending method. The fat-liquoring agent is an amphoteric fat-liquoring agent, and has strong acid, alkali and salt resistance, strong emulsifying capacity, good permeability, even distribution, strong bonding force with the leather, and little residue of the fat-liquoring agent in fat-liquoring waste liquor; and crust leather after the fat liquoring has the characteristics of delicate grain surface, clear pores, plump handfeel, elasticity, softness, smoothness, waterproofness and the like. Therefore, the fat-liquoring agent is the environment-friendly and good-performance amphoteric fat-liquoring agent.