2408results about "Urea compound fertilisers" patented technology

A high-nutrient and high-activity chemical fertilizer-biological compound fertilizer, and a preparation method and application thereof are provided. The high-nutrient and high-activity chemical fertilizer-biological compound fertilizer includes an inorganic chemical fertilizer and a microbial agent. The chemical fertilizer-biological compound fertilizer has nutrient contents of nitrogen, phosphorus, and potassium of greater than 40% and a viable number of microorganisms of 200 million cfu / g or more. The chemical fertilizer-biological compound fertilizer further includes a microbial protectant, and a mass ratio of the microbial protectant to the microbial agent is ≥1.

The invention relates to serratia marcescens XJ108 and application thereof, and belongs to the technical field of microorganisms. The serratia marcescens XJ108 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC No.29557, the preservation date is January 10, 2024, and the address of the preservation institution is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The invention also provides application of the serratia marcescens XJ108 in acid environment, alkaline environment, high salinity environment and high chemical fertilizer environment soil tolerance and plant growth promotion. The serratia marcescens XJ108 provided by the invention has certain biological safety; meanwhile, the plant growth promoting function is achieved; and various extreme soil environments can be tolerated.

The invention discloses a polymeric phosphorus slow-release compound fertilizer and a preparation method thereof, and relates to the technical field of agricultural fertilizers, the polymeric phosphorus slow-release compound fertilizer comprises an inner core and a coating layer, wherein the inner core is prepared from the following components in percentage by weight: 30 to 50 percent of modified ammonium polyphosphate, 15 to 25 percent of urea-formaldehyde slow-release nitrogen, 10 to 20 percent of potassium humate-coated potassium chloride, 2 to 5 percent of amino acid chelated trace elements and 1 to 3 percent of seaweed extract; through the synergistic effect of the citric acid modified ammonium polyphosphate and the three layers of functional envelopes, the phosphorus utilization rate is increased, and the problem that phosphorus is easily fixed by soil is effectively solved. The fertilizer can automatically adapt to different soil environments through the pH responsive coating design, and 30-40% of phosphorus can be quickly released in acid soil to meet the early needs of crops; phosphorus is continuously supplied through activation of the phosphate solubilizing bacteria under a neutral condition; and the fertilizer efficiency is prolonged to 120-150 days by virtue of an outer layer slow release mechanism in an alkaline environment.

The invention belongs to the technical field of soil fertilizers, and particularly relates to a soil conditioner and a preparation method thereof. Wherein the soil conditioner is prepared from the following raw materials in parts by weight: 30 to 40 parts of modified charcoal, 20 to 30 parts of microbial complexing agent, 15 to 25 parts of humic acid and 1 to 5 parts of biological enzyme; according to the microbial complexing agent, dopamine grafted and modified nano silicon dioxide and hydroxyapatite form a composite shell, pseudomonas aeruginosa and bacillus subtilis are wrapped, and the microbial complexing agent has the functions of protecting microorganisms, adsorbing heavy metals and slowly releasing phosphorus elements; the modified biochar is compounded with the attapulgite through acid-base treatment to form a porous structure with physical inlaying and chemical functional groups synergistic, so that the adsorption and fixation capability on heavy metals and organic pollutants is remarkably improved; the biological enzyme accelerates organic phosphorus conversion, and enzymatic hydrolysate provides a phosphorus source for microorganisms, promotes microorganism breeding, effectively increases the content of available phosphorus in soil, and enhances the stability of a remediation system.

The invention discloses a biomass charcoal composite hydrogel slow-release fertilizer as well as a preparation method and application thereof, and belongs to the field of composite hydrogel and fertilizer preparation. The invention provides a biomass charcoal composite hydrogel slow release fertilizer, which comprises biomass charcoal, hydrogel fixed on the pores and surface of the biomass charcoal, and an element fertilizer mixed in the hydrogel, and the hydrogel is prepared from metal cations and alginate. The invention provides a strategy of'in-hole in-situ gelation ', hydrogel is prepared in situ in gaps of the biochar, and the biomass charcoal composite hydrogel slow-release fertilizer is prepared. The biochar and the hydrogel in the slow-release fertilizer are high in bonding strength and mechanical strength, so that the slow-release fertilizer has the slow-release function of the fertilizer and also has the capability of improving soil.

The invention relates to the technical field of edible fungus cultivation and soilless culture, in particular to a preparation method and application of an organic ecological soilless culture substrate for dictyophora rubrovolvata. Auxiliary materials such as perlite, vermiculite, river sand and wood chips are mixed according to the proportion, and the soilless culture substrate is prepared. The matrix is completely used for soil-covered cultivation of dictyophora rubrovolvata, compared with a traditional cultivation mode, dictyophora rubrovolvata hyphae germinate quickly and grow vigorously, the conversion rate of mushroom buds (mushroom eggs) is high, the fruiting amount is large, meanwhile, the content of nutritional ingredients is increased, limited indexes such as heavy metal are obviously reduced, and the quality of dictyophora rubrovolvata products is effectively improved. According to the method, a new mode of soilless culture of edible mushrooms is constructed.

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, and belongs to the technical field of liquid fertilizers, organic waste and ferric oxide are ball-milled and mixed, transferred into a muffle furnace, roasted for 2-2.5 h at 280-310 DEG C under nitrogen protection, transferred into a reaction kettle and stirred and mixed with a 10 wt% hydrogen peroxide aqueous solution and potassium hydroxide powder, and the humic acid liquid fertilizer is obtained. The preparation method comprises the following steps: adding potassium humate into a potassium humate solution, extracting for 40-60 minutes under the assistance of ultrasonic waves, filtering to obtain a potassium humate extract and filter residues, transferring the potassium humate extract into a stirring kettle, adding urea, dipotassium phosphate, a composite carbon dot lubricant and a suspension stabilizer into the stirring kettle, and uniformly mixing to obtain the humic acid liquid fertilizer. The suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and through the antifriction and lubrication effects of the composite carbon dot lubricant, the friction force between indissolvable solids and water outlet holes of the drip irrigation equipment is reduced, and the risk of blockage of the drip irrigation equipment is reduced.

A method of increasing delivery of irrigation water and optionally a fertilizer to a predetermined depth in soil containing agricultural crops is disclosed. The method includes introducing formic acid to irrigation water to form a formate-enhanced irrigation water having a formate concentration of from about 10 ppm to about 10,000 ppm, and distributing the formate-enhanced irrigation water to the soil in an amount sufficient to (i) increase a flow rate of the irrigation water through the soil, (ii) reduce a compaction of the soil, and / or (iii) reduce a calcium concentration in the soil.

The invention discloses a complex microbial inoculant, which is prepared from bacillus NJAU-190 and pseudoxanthomonas NJAU-273, wherein the bacillus NJAU-190 and the pseudoxanthomonas NJAU-273 are used The invention also discloses an application of the fertilizer in straw compost. The bacillus NJAU-190 is beneficial to temperature rise in the earlier stage of composting, the pseudoxanthomonas NJAU-273 is beneficial to temperature rise in the later stage of composting, the two strains are compounded to promote temperature rise in the whole composting period, the composting efficiency is improved, and the composting conversion rate is increased. Compared with the treatment without inoculation of the microbial inoculum, the treatment with inoculation of the NJAU-190 + NJAU-273 composite microbial inoculum effectively promotes the temperature rise of the compost body, accelerates the composting process, significantly improves the germination index of the compost product, and significantly increases the total nutrient of the compost product. Compared with the treatment by inoculating the NJAU-190 microbial inoculum or the NJAU-273 microbial inoculum, the treatment by inoculating the NJAU-190 + NJAU-273 composite microbial inoculum can also significantly increase the total nutrient of the compost product.

The invention discloses an environment-friendly slow release fertilizer and a preparation method thereof, and belongs to the technical field of fertilizer mixture preparation. The preparation method comprises the following steps: mixing and stirring a mussel extract-polysaccharide-nitrogen fertilizer complex, an inorganic fertilizer and water according to a weight part ratio of (1-2): (5-7): (15-23), heating to 50-60 DEG C to form a dispersion solution, mixing and stirring the dispersion solution and a calcium salt according to a weight part ratio of 1: (0.005-0.01), cooling to 20-25 DEG C, and reacting for 20-24 hours to obtain a viscous mixture; and drying, dewatering and crushing the viscous mixture to obtain the environment-friendly slow-release fertilizer. According to the environment-friendly slow-release fertilizer, the mussel extract with a good adhesion effect and the carboxymethyl cellulose or the hyaluronic acid with biocompatibility are used as carriers, through the synergistic cooperation of an amide structure, an imine structure and metal coordination, wrapping of a nitrogen fertilizer and an inorganic fertilizer is achieved, and finally the environment-friendly slow-release fertilizer is obtained.

The invention discloses a clean production process of a blended fertilizer, which comprises the following steps: preparing and selecting raw materials; performing primary granulation on different raw materials to obtain uniform granular raw materials; performing closed ventilation storage on the granular raw materials; proportioning and metering the granular raw materials; mixing and stirring; finally, packaging is carried out, 4-5 mm particles obtained after the raw materials are subjected to extrusion forming through a pair of rollers and subjected to primary granulation are consistent in appearance state, air in the raw materials is removed through extrusion, gaps are compressed, the density and specific gravity of the formed particles tend to be uniform, and the product quality is improved. Blending layering caused by particle size, density difference and different adsorption capacities cannot occur when the raw materials are blended, the blended compound fertilizer meets the international general blending fertilizer proportioning principle, the completely-homogenized blending fertilizer quality requirement can be met, the processing cost is saved, the production efficiency is improved, and the production cost is reduced. And the problem of caking of the raw materials is effectively solved.

The invention provides a nitrification inhibitor and a preparation method thereof as well as stable urea and a preparation method thereof, and relates to the technical field of fertilizers. The nitrification inhibitor provided by the invention is prepared from the following components in percentage by mass: 20 to 45 percent of 3, 4-dimethyl pyrazole phosphate (DMPP), 30 to 70 percent of amino acid and the balance of auxiliaries, the auxiliary agent is one or more of polysaccharide, polyvinylpyrrolidone, poloxamer and carbomer. According to the invention, the DMPP and the amino acid are compounded, the amino acid is used as a stabilizer of the DMPP, so that the stability of the DMPP can be remarkably improved, and meanwhile, the polymer additive is used as an adhesive, so that the stability of the DMPP can be further improved. The nitrification inhibitor provided by the invention has excellent stability; the stable urea can be obtained by adopting an endogenous adding mode and adding the stable urea into the urea with relatively low loss, and the stable urea has multiple effects of improving the urea utilization rate, improving the crop quality, improving the soil biological environment, improving the soil fertility and the like.

The invention discloses an acid soil improvement type organic fertilizer and a preparation method thereof, and belongs to the technical field of microorganisms. The organic fertilizer is prepared from chicken manure, urea, a microbial agent, nicotine biochar, a synergist, silicon-calcium powder, biochemical potassium fulvate, alkaline residues, a modifier, turpentine and plant ash. The nicotine biochar is synergized by using a synergist, the alkaline residues are subjected to hydrophobic selective modification by using a modifier, and the alkaline residues, the microbial agent, biochemical potassium fulvate, silicon-calcium powder and plant ash synergistically play a role in improving the acid soil. The modified nicotine biochar contains a large amount of nicotine, and has strong heavy metal adsorbability and enhanced fertilizer efficiency under the action of a synergist; after the alkaline residues are modified by the modifier, the structure is decomposed into fine fragments, the degree of generating precipitates by aluminum ions and alkaline substances in the alkaline residues is promoted, after hydrophobic treatment, aluminum precipitates are more stable, aluminum toxicity can be effectively relieved, meanwhile, the slow release performance is achieved, acid soil is improved, and fertility is provided for the acid soil.

The invention discloses a P.megatherium YC5 strain, a fungicide and application thereof, and belongs to the technical field of sustained and controlled release fertilizers. According to the present invention, the Priestia megaterium YC5 capable of degrading and promoting nutrient release of the nutrient polymerization type slow release fertilizer is separated and screened from farmland soil for the first time, and has good degradation effect on the nutrient polymerization type slow release fertilizer, and the nutrient release of the Priestia megaterium YC5 can be efficiently matched with the crop demand; the strain is applied to farmland soil where the nutrient polymerization type slow release fertilizer is applied, nutrient release can be promoted when the strain is used for degrading the nutrient polymerization type slow release fertilizer, and the strain has the advantages of being high in nutrient utilization efficiency, high in matching degree of nutrient release and crop requirements, environmentally friendly and the like. The method has very important significance for promoting accurate and wide application of the nutrient polymerization type slow release fertilizer in agriculture.

The invention relates to a particulate composition comprising, or substantially consisting of, urea, an inhibitor, preferably a urease inhibitor and / or a nitrification inhibitor, and an additive, wherein the additive comprises components (i) and (ii): (i) a carboxylic acid or an anhydride, salt, or derivative thereof; preferably a carboxylic acid salt or a carboxylic acid derivative, more preferably a carboxylic acid salt; and (ii) a polar polymer; preferably a water-soluble polar polymer. The invention further relates to a process for preparing the particulate composition, an additive for a particulate composition, and the use of the particulate composition as a fertilizer.

Methods for stimulating plant growth and / or promoting plant health using free enzymes or recombinant microorganisms that overexpress enzymes are provided. Plant seeds coated with free enzymes or recombinant microorganisms that overexpress enzymes are also provided. Compositions comprising a fertilizer and an enzyme or a recombinant microorganism that overexpresses an enzyme are provided. Modified enzymes having ACC deaminase activity, recombinant microorganisms expressing the modified enzymes, plant seeds treated with the modified enzymes or recombinant microorganisms, and methods for stimulating plant growth and / or promoting plant health using the modified enzymes or recombinant microorganisms are also provided.

The invention provides a special package compound fertilizer for peppers and a topdressing method thereof. The special package compound fertilizer comprises a nitrogen fertilizer, a phosphate fertilizer, a potash fertilizer, a calcium fertilizer, a magnesium fertilizer, a boron fertilizer, a microbial compound fertilizer and an amino acid fertilizer. The microbial compound fertilizer is prepared from a mixed arbuscular mycorrhizal fungal agent, a zinc fertilizer and manure, the mixed arbuscular mycorrhizal fungal agent is Glomus fasciatus Vermann and sclerosporum Dusii, topdressing is started according to the mass ratio of nitrate ions to ammonium ions being 1: (2-3) 10 days after the pepper is transplanted, and topdressing is carried out for 6 times in total. According to the chili package compound fertilizer, the chili nutrient absorption rule and the nutrient utilization efficiency are taken as the fertilization starting point, the nitrogen-phosphorus-potassium fertilizer is taken as the main body, and medium trace elements with large demand quantity for chili are added, so that the chili yield can be remarkably increased, the fruit quality can be improved, and the chili package compound fertilizer is suitable for being popularized and used in chili planting areas.

The invention discloses a decomposition preparation containing bacillus licheniformis as well as a preparation method and application thereof, and belongs to the technical field of microorganisms. The decomposition preparation provided by the invention comprises bacillus licheniformis and Thermus arcuatus. The bacillus licheniformis is preserved in China General Microbiological Culture Collection Center (CGMCC) on June 27, 2025, the preservation address is No.3, No.1 Yard, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC No. 35039. The bacillus licheniformis is separated from coastal saline-alkali soil, has high temperature resistance and salt resistance, and can secrete protease and lipase at the same time. After the bacillus licheniformis and the Thermus arcuatus are mixed, the synergistic effect is remarkable, the duck-derived red mud is effectively promoted to be converted into humic acid, and high-value resource utilization of the duck-derived red mud is achieved.

The present disclosure provides non-intergeneric remodeled microbes that are able to fix atmospheric nitrogen and deliver such to plants in a targeted, efficient, and environmentally sustainable manner. The utilization of the taught microbial products will enable farmers to realize more productive and predictable crop yields without the nutrient degradation, leaching, or toxic runoff associated with traditional synthetically derived nitrogen fertilizer, by mitigating or eliminating the need for exogenous nitrogen-containing fertilizers. The remodeled microbes have unique colonization and nitrogen fixation abilities, which enable the microbes to deliver nitrogen to a cereal plant in a spatially targeted (e.g. rhizospheric) and temporally targeted (e.g. during advantageous stages of plants life cycle) manner. The microbes are able to replace the standard agricultural practice of sidedressing and enable a more environmentally sustainable form of farming. The present disclosure also provides methods of using non-intergeneric remodeled microbes, for example, to fix atmospheric nitrogen by reducing or eliminating the need for exogenous nitrogen-containing fertilizers, to increase yield, and to reduce infield variability in the yield.

The invention discloses a method for preparing an organic fertilizer from livestock and poultry manure, which comprises the following steps: mixing cow dung and plant ash, pig manure and edible mushroom waste, chicken manure and vegetable waste, and duck manure and corn bran or mushroom stick residue, inoculating a corresponding mixed inoculant, fermenting and decomposing by using a trough type aerobic fermentation process, crushing, and screening to obtain the organic fertilizer. The cow dung bio-organic fertilizer, the pig manure bio-organic fertilizer, the chicken manure bio-organic fertilizer and the duck manure bio-organic fertilizer are obtained. According to the invention, rapid decomposition in 28 days in winter and 18 days in summer can be realized, meanwhile, the decomposition degree is remarkably improved, the killing rate of harmful germs reaches 98.93%, the humus content is greater than or equal to 58%, and the product is rich in microbial beneficial bacteria, rich in organic matters, mild in fertilizer efficiency and free of root burning.

The invention provides a method for preparing a nitrogen-rich liquid fertilizer and a soil conditioner from agricultural biomass wastes, and belongs to the technical field of humic acid synthesis. According to the agricultural biomass waste treatment method, nano-bubble nitrogen sources are coupled with agricultural biomass waste for a hydrothermal reaction, and the nitrogen sources in the method serve as additives to provide nitrogen elements to improve the quality of humic acid and serve as catalysts to improve the yield; by adopting a nano bubble solution system, the contact area of a nitrogen source, agricultural biomass waste and water is increased, and the yield and quality of a product are improved. According to the method disclosed by the invention, the quality and yield of humic acid and hydrothermal carbon are improved, the content of nutrient elements such as nitrogen element in the product is increased, the problems of low nitrogen fertilizer utilization rate, single returning nutrient of fulvic acid, humic acid or hydrothermal carbon and the like are solved, and a new thought is provided for resource utilization of agricultural biomass wastes such as straws and the like.

The invention provides a soil flora analysis method, a related soil flora and application thereof. Based on a soil long-term positioning test, an absolute quantitative method is used for the first time to explore a dynamic assembly rule of rhizosphere and in-root microbiome in a plant full life cycle, and the response characteristics of the rhizosphere microbiome to different fertilization treatments are studied. By combining methods of metagenome, microorganism isolated culture, community synthesis and the like, functional adaptation of rhizosphere microorganisms under different fertilization conditions and a mechanism of influencing the growth of leguminous plants are disclosed. The invention also provides a method for improving the chemical properties and soil flora of soil; the invention also provides an artificially synthesized flora which has a promoting effect on the growth and biomass of leguminous plants.

The invention discloses a bio-based thermoplastic polyurethane coating material easy to degrade quickly and a controlled-release fertilizer. The coating material comprises 0.8-2.0 parts of a biological chain matrix and 0.5-1.5 parts of a chain reinforcing agent; the biological chain matrix is formed by mixing pre-oxidized vegetable oil diol and bio-based polyester diol; the chain reinforcing agent is formed by mixing a curing agent, a hardening agent and a toughening agent. The bio-based thermoplastic polyurethane coated controlled-release fertilizer comprises fertilizer particles and a bio-based thermoplastic polyurethane coating material sprayed on the surfaces of the fertilizer particles, the spraying amount of the bio-based thermoplastic polyurethane coating material is 0.8-10% of the mass of the fertilizer particles. By accurately regulating and controlling the formula of the film material, the physical properties such as tensile strength and toughness of the bio-based thermoplastic coating material can be jointly improved, so that a more excellent controlled release effect is achieved, and the contradiction between the degradability and the controlled release property of the existing bio-based polyurethane coating material is solved.

The invention discloses a water and fertilizer management method for transplanted high-yield indica type two-line hybrid rice, and belongs to the technical field of rice cultivation. Comprising the following steps: (1) applying citric acid chelated calcium magnesium phosphate fertilizer to soil before transplanting; (2) applying coated controlled-release urea and a silicon-zinc fertilizer on the third day after transplanting; (3) when the tiller number reaches 2650,000-2750,000 plants / hm < 2 >, starting intermittent light field drying for three times, and deeply applying potassium magnesium sulphate before field drying; (4) laterally and deeply applying urea and a boron-humic acid chelate when tips of two inverted leaves are exposed; (5) spraying an aqueous solution in a full heading stage, wherein the aqueous solution comprises monopotassium phosphate, chelated zinc and brassinolide. Through staged precise fertilization, special chelating / controlled release fertilizer and water and fertilizer-field drying cooperation, the method has the advantages that the fertilizer utilization rate is increased, the nutritional requirements of rice in each growth period are precisely matched, and water and fertilizer cooperative management is optimized.

The invention provides a nutrient slow-release synergistic seedling transplanting disc and application thereof. The nutrient slow-release synergistic seedling transplanting disc is composed of a disc body and a seedling cup, the disc body is composed of two layers of materials including PBAT and PLA, the seedling cup is composed of three layers of materials, the inner layer is made of the PBAT material, the middle layer is a strip-shaped fertilizer belt made of macroelements, organic fertilizer, bacterial fertilizer and microelements, and the outer layer is made of the PLA material. The nutrient slow-release synergistic seedling transplanting disc integrates seedling raising and fertilization and can be used for seedling transplanting of grafted seed melons, seedling cups are directly transplanted into soil during transplanting, seedlings and the disc do not need to be manually separated, the seedling transplanting disc does not need to be recycled and transported after transplanting, the seedling cups in the soil isolate damage of salt, alkali and diseases and insect pests to seedling roots, and the seedling transplanting disc is convenient to use. Meanwhile, nutrient substances are slowly released, nutrients needed by melon seedlings are accurately met, the problem that an original seedling raising plate pollutes the environment is solved, and the problems that roots are damaged during transplanting, fertilization is balanced, the growth environment of the roots is poor and germs are harmed are solved.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention discloses a special compound microbial fertilizer for corn and a preparation method, and relates to the technical field of special fertilizers for crops. The organic fertilizer is prepared from the following components in parts by weight: 15-20 parts of a microbial agent, 8-10 parts of charcoal, 20-25 parts of decomposed sheep manure, 8-10 parts of biogas residues, 5-8 parts of humic acid, 5-10 parts of monoammonium phosphate, 10-15 parts of urea, 8-12 parts of potassium chloride, 1-1.5 parts of boric acid, 1-2 parts of zinc amino acid chelate, 0.5-1 part of lipopeptide surfactin and 3-5 parts of diatomite. The four strains of bacillus amyloliquefaciens, azospirillum, bacillus subtilis and streptomycete are inoculated according to a proportion and are subjected to shake culture for 36 hours under the conditions that the temperature is 30 DEG C and the rotating speed is 180 rpm, the viable count reaches 2 * 10 CFU / mL, the four strains are co-cultured to reduce process steps, the nitrogen-fixing bacteria reduce the use amount of urea by 15%, the streptomycete improves the nematode inhibition rate by 40%, and meanwhile the culture cost is saved.

According to the long-acting water-soluble alkali-adjusting fertilizer and the preparation method thereof, raw materials of the long-acting water-soluble alkali-adjusting fertilizer are preferably selected from fully water-soluble materials, the product is fully water-soluble, the content of water-insoluble substances is smaller than 0.2% (G4 water-insoluble substance standard), and the long-acting water-soluble alkali-adjusting fertilizer is suitable for irrigation facilities such as drip irrigation facilities and sprinkling irrigation facilities; urea phosphate is used as a main acidic substance, so that the pH value of the product can be lower than 3.5 after the product is dissolved in water, and the effect of adjusting hard water is achieved; the raw material proportion is optimized, a certain amount of ammonium sulfate and powdery industrial monoammonium phosphate are used, meanwhile, the urea proportion is controlled, the use mode of ammonium bicarbonate after drying is matched, the system moisture is reduced, system dry-wet control is stabilized, the problem of screening deliquescence caused by system material acidity in the product production process is solved, and large-scale productivity is formed.

The invention relates to a plant nutrient solution capable of efficiently promoting growth. The plant nutrient solution capable of efficiently promoting growth is prepared from the following components in parts by mass: 10 to 20 parts of modified diatomite, 5 to 10 parts of nutrient substances, 0.5 to 3 parts of auxin, 1 to 3 parts of organic acid, 1 to 5 parts of auxiliaries and 50 to 100 parts of water, wherein the modified diatomite is sodium alginate and humic acid modified diatomite. The nutrient solution is obtained by compounding the modified diatomite, the nutrient substances, the auxin, the organic acid and the like, can improve the soil structure, regulate the plant growth and promote the yield and income increase of crops, is higher in stability, solves the problems in the prior art, and has a good application prospect.

The present invention relates to increasing and / or maintaining nitrogen content in soil by administration of nitrogen sources particles coated with urease inhibitors. In one embodiment, urease inhibitors are dispersed in an improved organo liquid delivery system at concentration levels of 60-95%. In another embodiment, urease inhibitors were applied in a non-aqueous, organo liquid delivery system coating nitrogen sources particles utilizing simple blending equipment at temperatures of 20°-70° C. Another embodiment discloses dry, flowable nitrogen sources coated with a urease inhibitor which can be administered directly to the soil, to a dry natural and / or a manmade fertilizer or to a liquid fertilizer which provides for the reduction of nitrogen loss from the soil. In another embodiment, a composition of urea and <0.2% dimethyl sulfoxide improves the crush resistance of the urea particles.