31 results about "Calcium ammonium nitrate" patented technology

The invention discloses a water-soluble fertilizer containing humic acid. The water-soluble fertilizer comprises the following components in parts by weight: 5-8 parts of ammonium sulfate, 28-32 parts of calcium ammonium nitrate, 18-22 parts of monoammonium phosphate, 32-38 parts of potassium sulfate and 10-15 parts of modified potassium humate. The preparation method comprises the following steps: carrying out alkali extraction on modified humic acid obtained by modifying lignite to prepare modified potassium humate, adding the modified potassium humate into a fertilizer raw material, and granulating to prepare the humic acid-containing water-soluble fertilizer. The preparation process comprises the following steps: S1, crushing and sieving the ammonium sulfate, the calcium ammonium nitrate, the monoammonium phosphate and the potassium sulfate, adding the modified potassium humate into a granulator in proportion, and uniformly stirring to obtain a mixture; s2, urea and water are prepared into a solution according to the mass ratio of 1: 3; and S3, uniformly spraying the urea guniting solution prepared in S2 into the raw material layer, and stirring until liquid drops and powder are in full contact to form particles to prepare the fertilizer. The humic acid-containing water-soluble fertilizer produced by the invention has the advantages of high nutrient content, soil structure improvement, crop root growth promotion and yield increase.

The invention belongs to the technical field of seedling culture. The invention provides a special nutrient solution for floating seedling raising of tobacco. The nutrient solution comprises the following components: 1000g of water, 0.3-0.5 g of acorus calamus and goldhair hedyotis herb aqueous extract fermented product, 0.1-0.3 part of corn straw steam explosion enzymolysis fermented product, 0.2-0.4 g of calcium ammonium nitrate, 0.6-0.8 g of potassium sulfate, 0.3-0.5 g of ammonium bicarbonate, 0.3-0.5 part of ammonium dihydrogen phosphate, 1-2mg of boric acid and 1-2mg of zinc sulfate. The nutrient solution special for tobacco floating seedling raising can remarkably improve the emergence rate of floating seedling raising, improve the seedling strengthening index and greatly reduce the disease index of tobacco infected with black shank; when the special nutrient solution for tobacco floating seedling raising is prepared, the used technical treatment means are mature technologies in the industry, so that the special nutrient solution has higher feasibility and high industrial application value.

The present application relates to the technical field of corn fertilization, and provides a corn whole growth period precise fertilization method, which comprises the following steps: S1, applying base fertilizer containing nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, brown algal polysaccharide, calcium ammonium nitrate, zinc citrate, potassium humate and gamma-polyglutamic acid between corn rows when corn is sowed; S2, spraying leaf fertilizer containing potassium dihydrogen phosphate, magnesium sulfate, alginic acid and polyaspartic acid during the corn filling stage; the base fertilizer is slow-release fertilizer, and after granulation, the base fertilizer is coated with a polyester composite layer and a wax layer in sequence. According to the present application, the base fertilizer is made into double-layer coated slow-release particles and applied with sowing, the outer layer of furfural / wax forms a hydrophobic barrier to inhibit the burst release and salt damage during the seedling stage, and the inner layer of polyester composite layer forms controllable water channels and slowly hydrolyzes with time, so that nutrients are supplied in stages in a platform mode during the corn growth period, and precise fertilization and efficient utilization are achieved during the whole growth period.

The invention discloses a liquid energetic material composed of non-dangerous chemical raw materials and a preparation method of the liquid energetic material, the liquid energetic material is formed by mixing an oxidizing agent concentrated solution and glycerin in proportion, and the oxidizing agent concentrated solution is obtained by mixing calcium ammonium nitrate, ammonium carbonate and water in proportion and then conducting filtration and vacuum concentration. According to the invention, the prior art is greatly improved, and the three raw materials are all non-dangerous chemicals, so that the traffic and storage safety in the long-time land and marine transportation process in the offshore oilfield operation can be greatly improved; the mode of obtaining the liquid energetic material on site is simple, and seamless butt joint operation with existing liquid gunpowder deflagration fracturing can be achieved; the influence of temperature on solubility is overcome, the composition proportion is moderate, the system can be completely dissolved after being prepared, the operation water adding amount is reduced by utilizing crystal water in the raw materials, and the preparation method is suitable for the environment in shortage of water resources.

The invention provides a selenium-rich cadmium-resistant foliar fertilizer and application thereof. The selenium-rich cadmium-resistant foliar fertilizer is prepared from functional components, the functional components comprise the following components in parts by mass: 15-30 parts of chelated iron, 10-30 parts of zinc gluconate and 10-30 parts of calcium ammonium nitrate. The selenium-rich cadmium-resistant foliar fertilizer can also be added with an auxiliary component, and the auxiliary component is one or more of potassium fulvate, polyglutamic acid and selenium yeast. Each part by mass of functional components in the selenium-rich cadmium-resistant foliar fertilizer corresponds to 0.08-0.4 part by mass of auxiliary components. The selenium-rich cadmium-resistant foliar fertilizer is dissolved in water to be sprayed on leaf surfaces of crops, so that the quality of agricultural products can be improved, and an effective way is provided for solving the problem that cadmium exceeds the standard.

The present invention provides a composite microbial fertilizer, a preparation method, and an application thereof, belonging to the field of fertilizer technology. The composite microbial fertilizer comprises 20-25 parts of Bacillus subtilis, 5-10 parts of Bacillus velezensis, 10-15 parts of Rhizobium, 3-7 parts of EM agent, 1-5 parts of Trichoderma, 10-15 parts of cassava residue, and 5-8 parts of calcium ammonium nitrate. Experiments have shown that the composite microbial fertilizer provided by the present invention can increase the emergence rate of peanuts while reducing the diseased fruit rate, and can also improve the resistance and yield of peanuts.

The invention belongs to the technical field of apple planting, and particularly relates to an apple tree fruit thinning agent and application thereof. The apple tree fruit thinning agent is prepared from the following raw materials in parts by mass: 70 to 75 parts of calcium ammonium nitrate, 10 to 15 parts of magnesium salt and 5 to 10 parts of magnesium silicate mineral. The apple tree fruit thinning agent disclosed by the invention has broad spectrum, and can effectively improve the apple quality, increase the single fruit rate of apples, increase the content of soluble solids and reduce the content of titratable acids.

The invention provides a process for the preparation of polyhalite granules comprising the steps of providing an aqueous ammonium nitrate (AN) solution; heating the solution to produce a hot solution; adding the hot solution to polyhalite; and allowing the mixture to cool during a granulation process. The invention further provides a process for the preparation of polyhalite granules where polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and / or magnesium nitrate and ammonium sulphate and a polyhalite granule comprising polyhalite and potassium ammonium nitrate.

The chelating type water-soluble fertilizer containing humic acid is prepared from the following raw materials in parts by weight: 35 to 45 parts of urea, 20 to 25 parts of dipotassium phosphate, 20 to 25 parts of calcium ammonium nitrate, 5 to 10 parts of humic acid, 25 to 30 parts of chitosan aqueous solution, 5 to 8 parts of bentonite-doped synergist, 4 to 7 parts of hydroxyapatite regulator, 2 to 4 parts of boric acid, 3 to 5 parts of compound element agent and 2 to 5 parts of vitamin agent. According to the chelating water-soluble fertilizer, the urea, the dipotassium phosphate, the calcium ammonium nitrate and the humic acid are blended, the boric acid, the compound element agent and the vitamin agent are added for mutual blending and regulation, the synergistic agent doped with bentonite and the hydroxyapatite regulator are adopted for regulation and effect regulation, synergistic interaction is achieved jointly, the effect of improving the plant yield and the quality of the product is remarkable, and the yield of the product is increased. Meanwhile, the product acts on the stability of plants under high and cold conditions.

The invention relates to the technical field of wastewater treatment, in particular to a calcium ammonium nitrate wastewater treatment device and method.The device comprises a PH adjusting tank, a buffer tank, a heat exchanger, a multi-medium filter, a precision filter, a ceramic filter, an ultrafiltration device, a concentration reverse osmosis device, a desalination reverse osmosis device, a concentrated water reverse osmosis device and wastewater discharge system equipment; the multi-medium filter comprises a filter tank body, a fiber ball filter material layer is arranged in the filter tank body, and a liftable compression frame and bearing frame structure is arranged; the compression frame moves along the vertical guide pipe through a magnetic force driving mechanism, compresses the fiber balls to form a gradient pore structure during filtration, and moves upwards to release the fiber balls and trigger the dispersion frame to unfold during backwashing so as to assist in loose cleaning of the fiber balls; the compression frame is sleeved on a vertical guide pipe in the filter tank body in a lifting manner, and the bearing frame is movably hoisted at the bottom of the guide pipe; the device disclosed by the invention can efficiently realize graded purification and resource recovery.

The utility model belongs to a calcium ammonium nitrate production system. Comprising a calcium ammonium nitrate production unit and an oil ring type vacuumizing unit connected with the calcium ammonium nitrate production unit, the calcium ammonium nitrate production unit at least comprises a single-effect condensate separator, a gas phase outlet of the single-effect condensate separator is connected with a single-effect evaporator, a gas phase outlet of the single-effect evaporator is connected with a single-effect evaporation separator, a gas phase of the single-effect evaporation separator is connected with a single-effect evaporation condenser, and a gas phase of the single-effect evaporation condenser is connected with a gas phase outlet of the single-effect evaporator. A gas phase outlet of the single-effect evaporative condenser is connected with the oil ring type vacuumizing unit; the oil ring type vacuumizing unit at least comprises a membrane type separation assembly capable of realizing oil-water separation; the device has the characteristics that the energy consumption is low, the efficiency is high, cavitation and icing phenomena are avoided, the running state of the device is stable, circulating oil can flow back and be recycled, waste is reduced, and the cost is saved.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an acidic surface treatment wastewater resource utilization method which comprises the following steps: S1, adding an oxidizing agent into acidic surface treatment wastewater to carry out oxidation-reduction reaction to obtain a pretreatment solution; s2, mixed alkali is added into the pretreatment liquid, the pH of the pretreatment liquid is adjusted to 1.0-2.5, stirring and filter pressing are conducted, and copper-nickel-containing filtrate and calcium phosphate are obtained; s3, continuously adding mixed alkali into the copper-nickel-containing filtrate, adjusting the pH value of the copper-nickel-containing filtrate to 2.5-3.0, stirring, and carrying out filter pressing to obtain nickel-containing filtrate and copper sludge; s4, continuously adding mixed alkali into the nickel-containing filtrate, adjusting the pH value of the nickel-containing filtrate to 6.5-7.0, and carrying out filter pressing to obtain a calcium ammonium nitrate evaporation stock solution and nickel mud; and S5, evaporating, concentrating, crystallizing and granulating the calcium ammonium nitrate evaporation stock solution to obtain calcium ammonium nitrate. By means of the method, calcium ammonium nitrate can be prepared, the copper recovery rate can reach 99.7% or above, and the nickel recovery rate can reach 99.1% or above.

The invention belongs to the technical field of apple planting, and particularly relates to a method for increasing single fruit weight and quality of apples, which comprises the following steps: applying a microbial fertilizer and a compound fertilizer in autumn, wherein the application amount of the microbial fertilizer is 20-25 kg / plant, and the application amount of the compound fertilizer is 1.5-2 kg / plant; from the germination stage to the young fruit stage, calcium ammonium nitrate is subjected to drip irrigation once a week, and 6.5-7 kg / mu of calcium ammonium nitrate is subjected to drip irrigation each time; wherein in the young fruit stage, phosphoric acid is applied in a drip irrigation mode once every 2-3 days, and 0.8-1 kg per mu of phosphoric acid is applied in a drip irrigation mode each time; from the young fruit stage to the initial fruit expansion stage, potassium nitrate is applied once every 13-15 days, and 1.8-2 kg / mu of potassium nitrate is applied each time; from the initial stage of fruit expansion to the time before harvesting, potassium sulfate is dripped once every 9-10 days, and 17-18 kg / mu of potassium sulfate is applied each time. The method provided by the invention effectively improves the formation of large apple fruits and increases the yield.

The present invention relates generally to methods for reducing the number of free- living parasitic helminths, particularly nematodes, on various surfaces by applying compositions comprising calcium nitrate (CN) and / or calcium ammonium nitrate (CAN).

The invention relates to the technical field of corn fertilization, and provides a corn whole growth period precise fertilization method, which comprises the following steps: S1, applying a base fertilizer containing a nitrogen fertilizer, a phosphate fertilizer, a potassium fertilizer, fucoidan, calcium ammonium nitrate, zinc citrate, potassium humate and gamma-polyglutamic acid between corn rows during corn sowing; s2, spraying a leaf fertilizer containing monopotassium phosphate, magnesium sulfate, alginic acid and polyaspartic acid in a corn filling stage; the base fertilizer is a slow-release fertilizer, and is sequentially coated with a polyester composite layer and a wax layer after being mixed and granulated. According to the scheme, the base fertilizer is prepared into double-layer coated slow-release particles and then applied along with sowing, the outer bran wax / microcrystalline wax forms a hydrophobic barrier to inhibit sudden release and salt damage in the seedling stage, and the inner polyester composite layer forms a controllable water channel and is slowly hydrolyzed along with time, so that nutrients enter staged platform type supply in the corn growing period; and precise fertilizer supply and efficient utilization in the whole growth period are achieved.

The invention provides a method for preparing polyhalite particles. The method comprises the following steps: providing an ammonium nitrate (AN) aqueous solution; heating the solution to produce a hot solution; adding the hot solution into polyhalite; and allowing the mixture to cool during the granulation process. The invention also provides a method of making polyhalite particles wherein the polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and / or magnesium nitrate and ammonium sulfate, as well as polyhalite particles comprising polyhalite and potassium ammonium nitrate.

The invention relates to the technical field of agricultural fertilizers, and discloses a novel water-soluble fertilizer and a preparation method thereof, and the novel water-soluble fertilizer comprises the following components: 10-30 parts of a cellulose nanocrystal skeleton; 5 to 15 parts of a temperature-sensitive copolymer, wherein the temperature-sensitive copolymer is formed by copolymerization of N-isopropylacrylamide and acrylic acid; 30-60 parts of macroelements including calcium ammonium nitrate, ammonium polyphosphate and potassium sulfate; the trace elements are citric acid chelates of iron, zinc and manganese; and 3-8 parts of an environmental response module, which contains an iron-cobalt cyanide hydrate and a sodium alginate membrane material. By adopting the dynamic coupling design of a temperature-sensitive copolymer and cellulose nanocrystals, the nutrient release rate is automatically adjusted along with the soil temperature, and the prior art depends on a static slow-release material and cannot adapt to root system absorption fluctuation caused by day and night temperature difference. And the invalid flow in a high-temperature environment is obviously reduced.

Fertilizers containing calcium ammonium nitrate and ammonium sulfate are disclosed. The invention also discloses a preparation method and a use method of the fertilizer.

The invention relates to the technical field of water-soluble fertilizers, and particularly discloses a water-soluble fertilizer for promoting growth and preventing diseases of small watermelons and a preparation method of the water-soluble fertilizer. Comprising the following raw materials in parts by weight: urea, ammonium nitrate, monoammonium phosphate, diammonium phosphate, potassium nitrate, potassium sulfate, calcium chloride, magnesium sulfate, chelated iron, humic acid, amino acid, sugar alcohol calcium, calcium ammonium nitrate, fulvic acid, algal polysaccharides, mannitol, chitin, zhongshengmycin, kasugamycin, ethylicin, a compound microbial agent, photosynthetic bacteria, a wetting agent and a filler. The water-soluble fertilizer is prepared from nitrogen, phosphorus and potassium elements, organic substances and microbial strains and can be applied to the small watermelons in a composite mode, the small watermelons can fully absorb nutrient substances through the action of multiple substances, the purpose of promoting growth of the small watermelons is achieved, and the yield of the small watermelons is increased. And bacterial diseases and fungal diseases of the watermelons can be effectively prevented through microbial strains.

The present invention relates to a fertilizer particle comprising two or more of from 1.0 to 30 wt.% of nitrogen being present as calcium ammonium nitrate (CAN), and from 0.0001 to 5.0 weight% of protein hydrolysate as a biostimulant, based on the total weight of the fertilizer particle. The present invention furthermore relates to a method to produce such fertilizer particles.

The invention relates to a composite synergistic titanyl sulfate water-soluble fertilizer and a preparation method thereof, and belongs to the field of water-soluble fertilizer production, the composite synergistic titanyl sulfate water-soluble fertilizer comprises the following substances by weight: 2.5 parts of titanyl sulfate, 0.8 part of EDTA, 1.6 parts of manganese sulfamate, 40-50 parts of calcium ammonium nitrate, 5 parts of lysine chelated zinc, 60-80 parts of potassium dihydrogen phosphate, and 500 parts of deionized water. According to the invention, titanyl sulfate, EDTA and manganese sulfamate are compounded according to a specific low proportion, and through a synergistic effect of chelating synergism and accurate regulation and control of carbon metabolism, ion interference is avoided, and dual enhancement of the activity and quality improvement effect of the titanium fertilizer is realized at the same time; according to the invention, the chelating effect of EDTA can improve the solubility, the stability and the bioavailability of metal ions; the manganese sulfamate can promote conversion balance of oxygen and carbon dioxide in plants at low concentration, activate carbon metabolism key enzymes and improve sugar synthesis efficiency and utilization rate.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a comprehensive utilization method of sulfuric acid and nitric acid mixed acid wastewater. Comprising the following steps: S1, mixing sulfuric acid and nitric acid mixed wastewater with a waste PCB, automatically carrying out catalytic oxidation reaction, and carrying out filter pressing to obtain a copper sulfate solution and tail gas; s2, urea is added into the copper sulfate solution, phosphoric acid and ammonia water are added after no bubbles are generated, stirring and filtering are conducted, and a purified copper sulfate solution is obtained; evaporating, crystallizing, centrifuging, washing and separating the purified copper sulfate solution to obtain copper sulfate pentahydrate; and S3, spraying and absorbing the tail gas in the step S1 to obtain dilute nitric acid, adding lime to adjust the pH value to 1.2-1.6, adding ammonia water to adjust the pH value to 7 to obtain calcium ammonium nitrate mother liquor, and performing evaporative crystallization and granulation on the calcium ammonium nitrate mother liquor to obtain calcium ammonium nitrate. According to the method, the sulfuric acid and nitric acid mixed acid wastewater and the waste PCB are used for synergistically preparing high-purity copper sulfate pentahydrate and calcium ammonium nitrate for the first time.

The invention belongs to the technical field of seedling culture. According to the seedling raising method for improving the tobacco floating seedling raising uniformity and the seedling quality, during seedling raising, a special seedling raising substrate and a special nutrient solution are adopted; the special seedling raising substrate is prepared from the following components in parts by weight: 100 parts of excrement plant extraction residue pyrolysis compound, 3-6 parts of turf, 10-12 parts of corn straw, 18-20 parts of vermiculite, 13-16 parts of river sand and 8-12 parts of coco coir, the special nutrient solution is prepared from 1000g of water, 0.3 to 0.5 g of acorus calamus and goldhair hedyotis herb aqueous extract fermented materials, 0.2 to 0.4 g of calcium ammonium nitrate, 0.6 to 0.8 g of potassium sulfate, 0.3 to 0.5 g of ammonium bicarbonate, 0.3 to 0.5 part of ammonium dihydrogen phosphate, 1 to 2 mg of boric acid and 1 to 2 mg of zinc sulfate. According to the seedling raising method, the uniformity of the tobacco seedlings can be effectively improved on the basis of obviously shortening the seedling emergence time and improving the seedling emergence rate, the seedling strengthening index and the disease resistance.

The application relates to the technical field of concrete production, and particularly discloses an anti-cracking and anti-corrosion concrete and a production method thereof. The anti-cracking and anti-corrosion concrete is prepared from the following components in parts by weight: 250-320 parts of sulphoaluminate cement, 700-850 parts of gravel, 350-450 parts of sand, 110-190 parts of kaolin, 60-130 parts of blast furnace slag, 20-50 parts of feldspar powder, 20-40 parts of composite fiber, 8-20 parts of corrosion inhibitor and 150-200 parts of water; the composite fiber comprises polypropylene fiber, glass fiber and carbon fiber; the corrosion inhibitor is sodium diisooctyl sulfosuccinate and hydroxypropyl distarch phosphate coated calcium ammonium nitrate. The composite fiber and the corrosion inhibitor are added into the raw materials for preparing the concrete, the corrosion speed of chloride ions is slowed down, and the anti-cracking performance and the anti-corrosion performance of the concrete are improved.

The invention discloses a water-soluble fertilizer for a fruit development period of a fruit tree, and relates to the technical field of water-soluble fertilizers, and the water-soluble fertilizer is characterized by comprising the following components in parts by weight: 10 parts of potassium nitrate, 6 parts of calcium ammonium nitrate, 5 parts of ammonium polyphosphate, 3 parts of magnesium sulfate, 1 part of trace elements, 1 part of potassium fulvate and 1 part of an amino acid fertilizer. The trace elements are formed by mixing EDTA-Fe, boric acid, manganese sulfate, zinc sulfate, copper sulfate and ammonium molybdate. The invention develops the special water-soluble fertilizer formula for the fruit tree fruit development period, optimizes the fruit tree fertilization scheme, and improves the fruit yield and quality.

This invention discloses a method for increasing the nicotine content of tobacco leaves under rainy and low-sunlight conditions, belonging to the field of agricultural planting technology. The method includes: transplanting; applying nitrogen fertilizer: nitrogen fertilizer is applied in three stages, using a mixture of ammonium nitrogen fertilizer and nitrate nitrogen fertilizer. The ammonium nitrogen fertilizer is ammonium sulfate or ammonium bicarbonate, and the nitrate nitrogen fertilizer is calcium ammonium nitrate or potassium nitrate; spraying foliar fertilizer: amino acid foliar fertilizer, potassium dihydrogen phosphate foliar fertilizer, and water are mixed at a volume-to-mass ratio of 50mL:45g:15kg to obtain a foliar fertilizer mixture. The first foliar spray is applied 60 days after transplanting, followed by spraying once a week for three consecutive times. The application rate of the foliar fertilizer mixture is 45-50kg / mu; topping: topping is performed 15-20 days after initial flowering, leaving 18 leaves per plant; curing. This invention can promote photosynthesis, accelerate nicotine synthesis, and slow down the nicotine conversion process, thereby reducing nicotine loss.

The invention discloses a multifunctional snow-melting agent and a preparation method thereof, and belongs to the technical field of composite salt. The multifunctional snow-melting agent provided by the invention is prepared by optimizing and compounding various chemical materials such as water, potassium carbonate, sodium diacetate, calcium ammonium nitrate, magnesium chloride, calcium chloride, polyaspartic acid, sodium gluconate and the like. The snow and ice melting speed is high, the using amount is small, pollution is small, the effect is good, and both liquid and solid are contained; the corrosion to metal and cement concrete can be effectively reduced, and the lowest freezing point value can reach-69.3 DEG C; the plant growth can be promoted or the damage to the plant can be reduced; and the device has multiple functions of disinfecting and sterilizing, purifying water, reducing the content of sulfate ions and chlorides, realizing an echelon comprehensive effect of synchronously performing heat release and heat absorption, reducing damage to municipal infrastructures and the like. The snow and ice melting device is suitable for being used in various areas such as streets, roads, bridges and rail transit, can perform mechanical scattering or spraying operation, realizes instant snow melting and ice melting, and is particularly suitable for being used in emergency rescue.

The present application relates to the technical field of calcium ammonium nitrate, and particularly relates to a method for producing spherical calcium ammonium nitrate particles by high-tower granulation. The present application discloses a method for producing spherical calcium ammonium nitrate particles by high-tower granulation, which comprises the following steps: ingredient mixing, in which calcium ammonium nitrate containing trace amounts of magnesium is delivered into a first mixing tank at the top of a granulation tower, and calcium ammonium nitrate return material is subjected to melt mixing; after the melt mixing is completed, overflow is performed to enter a second mixing tank, and melt mixing is performed again to obtain a melt liquid; granulation and screening, in which the melt liquid is subjected to granulation by overflow into a granulator, and after cooling and screening, calcium ammonium nitrate products are obtained. The method disclosed in the present application adopts a melt method for high-tower melt granulation, and compared with a traditional spray method for granulation, the method has lower energy consumption, very low dust emission, and the calcium ammonium nitrate products have round particles, no irregular particles, and a particle size of 2-4 mm, which meets the requirements of seed and fertilizer intercropping and mechanized large-scale machine sowing.

The invention discloses a biological cement sand-fixing and water-retaining material with synergistic effect of calcium ammonium nitrate and soybean urease as well as a preparation method and application of the biological cement sand-fixing and water-retaining material, and belongs to the technical field of environmental restoration and biological materials. The invention discloses a biological cement sand-fixing and water-retaining material with synergistic effect of calcium ammonium nitrate and soybean urease. The biological cement sand-fixing and water-retaining material is prepared from soybeans, deionized water, calcium ammonium nitrate and urea. The method comprises the following steps: 1, preparing a soybean urease solution; 2, preparing a calcium ammonium nitrate-urea salt solution; and 3, mixing. The biological cement sand-fixing and water-retaining material with the synergistic effect of calcium ammonium nitrate and soybean urease is applied to desertification control, coast dune fixation or soil ecological restoration. After the biological cement sand-fixing and water-retaining material with the synergistic effect of the calcium ammonium nitrate, the soybean urease and the polymer is solidified, the water content of sandy soil is nearly 80%, the biological cement sand-fixing and water-retaining material has a certain water supplementing effect on growth of crops planted in desertified or severely weathered soil, chloride ion residues are avoided, the strain culture problem is avoided, the cost is reduced by 40%, and the effect is obvious. Meanwhile, nitrogen nutrition is provided to promote vegetation recovery.

Disclosed is a fertilizer containing calcium ammonium nitrate and ammonium sulfate. Methods of making and using the fertilizer are also disclosed.