587 results about "ZINC SULFATE HEPTAHYDRATE" patented technology

The invention discloses a method for producing zinc sulfate heptahydrate, crude tin and crude lead by using tin smelting dust. The method comprises the following steps of: (1) pretreating the raw material; (2) leaching with a dilute sulphuric acid to separate out zinc; (3) purifying the crude zinc sulfate solution, preparing zinc sulfate heptahydrate; (4) performing electric furnace smelting on the tin-rich residue to prepare a tin-lead alloy; (5) adopting the conventional liquation process (the temperature is 500-600 DEG C) and the agglutination method (the temperature is 230-240 DEG C) to refine the tin-lead alloy and increase the Sn-Pb grade of the alloy to 94%-96%, and sending the refining residue back to the electric furnace to perform smelting and dosing treatment; and (6) performing high temperature vacuum distillation to produce crude tin and crude lead. By adopting the method, the tin smelting dust can be effectively utilized, the resource can be saved and metals such as tin,lead, zinc and copper can be recovered together.

An improved process calcining a gypsum / cellulosic fiber slurry to produce a composite gypsum / cellulosic fiber product resides in adding a selected crystal modifier to the gypsum / cellulosic fiber slurry prior to the heating step to reduce the time necessary to carry out the calcination process, to reduce the temperature at which the calcination process is run or to increase the aspect ratio of the acicular calcium sulfate alpha hemihydrate crystals formed during the calcination process. Useful crystal modifiers include aluminum sulfate, aluminum chloride, chlorine, zinc sulfate, iron (III) sulfate, aluminum sulfate hexadecahydrate, iron (II) sulfate heptahydrate, iron (III) sulfate pentahydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, copper chloride dehydrate, manganese sulfate monohydrate and trisodium phosphate.

The invention relates to the soiless culture field and in particular relates to a soiless culture nutrient solution; every liter of water comprises the following components by weight: major constituents consisting of 900mg-2200mg of much EM (Effective Microorganisms) probiotics liquid, 900mg-2200mg of brown sugar, 900mg-1000mg of calcium nitrate tetrahydrate, 700mg-900mg of potassium nitrate, 150mg-220mg of ammonium dihydrogen phosphate and 300mg-500mg of magnesium sulfate heptahydrate; micro constituents consisting of 20mg-25mg of EDTA (Ethylene Diamine Tetraacetic Acid) chelated iron, 2mg-3mg of boric acid, 2mg-3mg of manganese sulfate monohydrate, 0.1mg-0.5mg of zinc sulfate heptahydrate, 0.01mg-0.1mg of copper sulfate and 0.01mg-0.08mg of ammonium molybdate tetrahydrate. The soiless culture nutrient solution provided by the invention can be used for improvising the immunity of the soiless culture nutrient solution for resisting plant diseases and insect pests of the crops.

The invention discloses a water-soluble organic liquid fertilizer and a preparation method thereof. The fertilizer is prepared from the following raw materials in percentage by weight: 40 to 80 percent of molasses fermentation liquid, 10 to 50 percent of biochemical potassium fulvate, 3 to 10 percent of boric acid, 2 to 8 percent of ethylene diamine tetra-acetic acid, 1 to 5 percent of heptahydrate zinc sulphate, 2 to 6 percent of manganese sulfate monohydrate, 0 to 5 percent of ferrous sulphate heptahydrate and the balance of water, wherein the sum of the raw materials is 100 percent. The production method for the fertilizer comprises the following steps: putting the molasses fermentation liquid in an amount which is one third of the formulation amount and the water into a reaction kettle, heating the mixture to 60 DEG C, and adding the ethylene diamine tetra-acetic acid into the mixture; adding the heptahydrate zinc sulphate, the manganese sulfate monohydrate and the ferrous sulphate heptahydrate into the mixture, and stirring the mixture for 30 minutes; and adding the boric acid, the residual molasses fermentation liquid and the biochemical potassium fulvate into the mixture, stirring the mixture for 30 minutes and cooling the mixture. The fertilizer is brown liquid, has multiple fertilization modes, can prevent multiple plant diseases and insect pests, increase the yield of crops, improve the quality and increase the yield by 10 to 20 percent, and makes a contribution to the development of organic agriculture.

The invention relates to a composition for improving soil, in particular relates to a saline-alkali soil conditioner. The saline-alkali soil conditioner is prepared by mixing the following components by weight percent: 20%-35% of sulfur powder, 20%-30% of humic acid, 5%-10% of bentonite, 20%-25% of magnesium sulfate heptahydrate, 8%-12% of calcium superphosphate, 1%-2% of zinc sulfate heptahydrate and 2%-3% of boric acid. The saline-alkali soil conditioner can be used for regulating acid-base level of the soil, and effectively supplementing microelements in the soil, improving the nutritional deficiency symptom of crops, chelating harmful heavy metal elements in the soil, reducing saline and alkali degree, promoting the soil to form a granular structure, improving root growth environment of crops, enhancing saline and alkali resistance of crops, disease resistance and cultivation of resilience, reducing the harm of saline and alkali to plant roots, and releasing the effective phosphorous solidified by the soil, increasing soil fertility, holding water and saving fertilizer so as to finally and completely improve the soil, recover the soil fertility, increase both production and income and improve crop quality and utilization rate of the fertilizer.

The invention discloses a special basal fertilizer used in ecological tobacco leaf plantation. The invention belongs to the technical field of organic fertilizers. The special basal fertilizer used in ecological tobacco leaf plantation comprises components of, by weight: 19 to 23% of fermented cake fertilizer, 43 to 47% of biogas residue, 17 to 21% of common calcium superphosphate, 2.3 to 2.7% ofpotassium nitrate, 0.27 to 0.32% of borax, 0.8 to 0.9% of zinc sulfate heptahydrate, 9.5 to 9.9% of potassium sulfate, 0.05 to 0.15% of potassium humate, and 0.64 to 0.68% of mixed microbial manure. The basal fertilizer is prepared through steps that: (1) cake fertilizer and biogas residue are dried and crushed, such that a basic mixture is obtained; (2) the mixed microbial manure is added; and (3) common calcium superphosphate, potassium nitrate, borax, zinc sulfate heptahydrate, potassium sulfate, and potassium humate are added. With the basal fertilizer provided by the invention, soil micro ecological environment can be repaired or protected, tobacco plant disease resistance can be improved, quality of fire-cured tobacco can be improved, and ecological tobacco production can be continuously and healthily developed.

The invention provides a method for controling arsenic pollution in the copper metallurgy industry, is characterized in that arsenic acid filtering case is added as vulcanized agent in sulphuric acid extract of copper metallurgy smoke to precipitate copper, copper slag and the solution containing copper are obtain by separation; the solution containing copper is contracted to 60-100 g / l of arsenical concentration and then cooled to the room temperature, heptahydrate zinc sulphate and crystal mother liquor are obtained after separation; sulfur dioxide is added to crystal mother liquor, thereby arsenic is dissolved out in the form of arsenic trioxide, arsenic trioxide and the solution after precipitating arsenic are obtained after separation, the solution after precipitating arsenic is back to smoke extract. The separature of the main component such as copper, arsenic, zinc and cadmium is performed in sulphuric acid extract of copper metallurgy smoke and arsenic acid filtering case with an objective for controling arsenic pollution economically and effectively, while provided with an advantage for further recycling valent metal synthetically.

The invention discloses a leaf vegetable nutrient solution formula. The leaf vegetable nutrient solution formula is characterized in that leaf vegetable nutrient solution comprises fertilizers and citric acid; the leaf vegetable nutrient solution comprises the following components: major elements of calcium nitrate tetrahydrate 450-500 mg / L, potassium nitrate 180-250 mg / L, monopotassium phosphate 50-80 mg / L, magnesium sulfate heptahydrate 400-620 mg / L and ammonium nitrate 20-70 mg / L; trace elements of boracic acid 1-5 mg / L, manganous sulfate 1-4 mg / L, zinc sulphate 0.1-1 mg / L, ammonium molybdate 0.005-0.05 mg / L, copper sulphate heptahydrate 0.01-1 mg / L and ethylene diamine tetraacetic acid disodium ferric salt 5-40 mg / L; citric acid 3-20 mg / L; and the balance of water. The leaf vegetable nutrient solution formula disclosed by the invention is reasonable in components, good in stability and wide in range of application.

The invention relates to an organic liquid fertilizer containing chitosan. The organic liquid fertilizer comprises the chitosan, humic acid, fulvic acid, phosphorus pentoxide, potassium hydroxide, boric acid, edetic acid, zinc sulphate, manganese sulfate monohydrate, glycine, glutamic acid, serine and lysine. Aqueous extract of traditional Chinese medicines is added into the organic liquid fertilizer. As various marine bioactive ingredients such as the chitosan are added into the organic liquid fertilizer, the organic liquid fertilizer can be used for culturing a great quantity of effective microbial communities of actinomycetes and the like within short time after being applied to soil. Antibiotics and other substances secreted from the effective microbial communities can inhibit harmful microbial communities of pythium aphanidermatum, rhizoctonia and the like, and thus a microbial environment of the soil can be improved rapidly. The chitosan also can be used for accelerating the growth of root systems and the combination of the root systems and the soil. In addition, as the aqueous extract with insecticidal efficacy of the traditional Chinese medicines is added into the organic liquid fertilizer, plant diseases and insect pests of leaf surfaces can be effectively reduced when the fertilizer is applied to the leaf surfaces.

The invention discloses a paddy rice seedling breeding matrix, and belongs to the technical field of soilless culture. The full-nutrient paddy rice seedling breeding matrix is prepared from the following raw materials: decomposed organic manure, turf, clay, zeolite powder or bentonite, vermiculite, fine river sand, rice hull powder or corn straw powder or mushroom residue powder, soybean meal, ammonium sulfate, calcium superphosphate, potassium chloride, magnesium sulfate heptahydrate, zinc sulfate heptahydrate, ferrous sulfate heptahydrate, boric acid, copper sulfate pentahydrate, manganese sulfate monohydrate and sodium metasilicate nonahydrate. The full-nutrient paddy rice seedling breeding matrix disclosed by the invention has the advantages of high fertilizer-retaining property and water-retaining property, good air permeability, high buffering, full nutrient and more persistence in fertility, achieves the pH of 5.0-5.5, and is lower in cost by utilizing agricultural wastes, namely rice hulls, corn straws, mushroom residues and the like, suitable for batch production, good in seedling breeding effect and convenient for a farmer to use.

The invention discloses a specialized biological compound fertilizer for grape. A first formula is that a total amount of nitrogen phosphor and potassium is 30% with a ratio of 1: 0.8 : 1.2; and the proportion (by weight) of each raw material is as follows: 62.8 parts of fresh semi-dried chicken manure, 0.2 part of a calcium magnesium phosphate fertilizer, 23.8 parts of potassium fulvic acid, 2 parts of borax, 1 part of copper sulfate pentahydrate, 1 part of zinc sulfate heptahydrate, 1 part of ferrous sulfate heptahydrate, 3.2 parts of amino acids, 2 parts of microbial agents, 1 part of a synergist and 2 parts of a conditioner. A second formula is that a total amount of nitrogen phosphor and potassium is 25% with a ratio of 1: 0.8 : 1.38; and the proportion (by weight) of each raw material is as follows: 76 parts of fresh semi-dried chicken manure, 4 parts of potassium sulphate, 2 parts of amino acid chelated (complexed) zinc, boron, copper and ferrum, 8.5 parts of nitrohumate,3.5 parts of amino acids, 3 parts of a microbial preparation, 1 part of a synergist and 2 parts of a conditioner. A product is obtained by stirring the above materials uniformly, spray granulating, and drying at a low temperature or air drying.

The invention discloses a fertilizer special for wheat and an application thereof. In the fertilizer, the mass ratio of nitrogen, phosphorin, potassium, sulphur and zinc is 12-15:17-20:10-15:7-8:0.5-1; the nitrogen is selected from at least one of urea, ammonium sulphate and monoammonium phosphate; the phosphorin is monoammonium phosphate; the potassium is potassium sulphate; the sulphur is selected from at least one of the ammonium sulphate and potassium sulphate and the zinc is zinc sulphate. The fertilizing method of wheat of the invention is divided into two stages; basic fertilizers use the fertilizer special for wheat of the invention and the additional nitrogen fertilizer is dressed on two stages, namely setting stage and booting stage of the wheat. The application of the fertilizer special for wheat of the invention and the matching fertilizing method realize nutrient balance of nitrogen and sulphur and have significant influences on the growth, yield and processing quality of wheat.

A method for preparing particle ammonium sulfate product by organic-inorganic binder, comprises the following steps: (1) polyacrylamide, polyethylene glycol and polyvinyl alcohol are selected to be organic binder; monoammonium phosphate, diammonium phosphate, ammonium bicarbonate, magnesium sulfate monohydrate, magnesium sulfate hetahydrate and heptahydrate zinc sulphate are selected to be inorganic binder; (2) crystal ammonium sulfate is crashed; (3) the one or more organic binder is dissolved, mixed evenly with the one or more inorganic binder in a solution pump and a pelletizer, and is sprayed with steam or water on the surface of ammonium sulfate to carry out pelleting to obtain semi-finished product; (4) the semi-finished product is dried; (5) dried finished product is screened after inspected particles with suitable particle sizes are selected to be the product. The invention has the following advantages: (1) the process is simple, thus facilitates operation; (2) the binder is accessible, and the product has uniform particle sizes with strength being suitable for large scale mechanized operation; (3) the mixture ratio of the binder is free, thus being capable of satisfying large scale mechanized operation. The invention is suitable for popularization in compound fertilizer production.

The invention provides a special slow-release organic fertilizer for grapes and a preparation method of the fertilizer. The special slow-release organic fertilizer for the grapes consists of lignin, diatomite, attapulgite, humic acid, calcium bentonite, castor bean meal, a nitrogenous fertilizer, a calcium magnesium phosphate fertilizer, a potash fertilizer, microelements and water. The microelements consist of agricultural rare earth, borax, copper sulfate, manganese sulfate and zinc sulfate heptahydrate. The preparation method comprises steps of dissolving, stirring and mixing components and performing granulation. The special slow-release organic fertilizer for the grapes is reasonable in component, the utilization rate of the fertilizer and the grape yield are increased greatly through the synergy of all the components, meanwhile, the problems of eutrophy and nutrient deficiency symptoms of crops are solved effectively, the taste of the grapes is greatly improved, the problem of water pollution caused by fertilizer loss is solved effectively, the soil is improved, resources are saved, and the cost is reduced; and the preparation method is simple and meets the requirement of large-scale industrial production.

The invention provides a comprehensive recycling technique of valuable elements in smelting soot, which comprises the steps of: adding sulfuric acid in the smelting soot to pulpify the same, leaching for twice, and filter pressing the smelting soot to form lead-silver-bismuth slag; smelting, casting, electrolyzing, refining and reducing and smelting the lead-silver-bismuth slag in a converter to obtain rough lead, copper matte, pure bismuth and silver-zinc slag; adding cupric hydroxide in the supernatant to deposit arsenic, depositing the copper in the copper arsenate slag with deposited arsenic to form copper-arsenic solution, concentrating, crystallizing, dissolving and separating the solution to obtain white arsenic and cupric sulfate solution; performing twice electrodeposition treatments on the copper-zinc-cadmium solution with deposited arsenic to respectively obtain electrolytic copper and black copper, sequentially adding zinc oxide and zinc powder to perform deacidification, high-temperature copper removal and low-temperature cadmium removal treatments to obtain sponge cadmium, smelting the sponge cadmium to obtain rough cadmium, concentrating and crystallizing the zinc sulfate solution to obtain heptahydrate zinc sulfate. The comprehensive recycling technique provided by the invention has the advantages of improving the recovery of multiple metals, having extensive treatment raw materials, low production cost and high economic benefit, and avoiding the secondary pollution of decentralized processing and secondary loss of valuable metals.

A process for all-wet recovery of valuable elements in a complex low-grade sulphide ore comprises the following steps: crushing and grinding a raw material, sieving the crushed and ground raw material, performing size mixing by use of a sodium hydroxide solution, and after that, performing pressurized oxidizing leaching to obtain an alkaline-leached solution and alkaline-leached residues; acidizing the alkaline-leached solution to obtain a lead sulfate product and a heavy lead solution, and performing potential reduction control step by step on the heavy lead solution to obtain crude selenium powder, crude tellurium powder and a post-reduction solution; performing copper-soaking on the alkaline-leached residues by use of a sulfuric acid solution to obtain copper-leached residues and a copper-leached solution; performing antimony and bismuth soaking on the copper-leached residues by use of an acid liquor containing chloride ions to obtain an antimony-leached solution and antimony-leached residues, feeding the antimony-leached slags to noble metals for recovery, and adjusting the pH of the antimony-leached solution step by step to obtain antimony residues and bismuth residues; adjusting the pH of the copper-leached solution to obtain iron residues and an iron-removed solution, wherein the iron residues serve as a waste water treatment additive, and the iron-removed solution is subjected to zinc dust replacement to obtain copper powder and a post-replacement solution; and merging the post-reduction solution and the post-replacement solution, and performing concentration and crystallization to obtain heptahydrate. The process is good in comprehensive recovery effect, strong in adaptation to the raw material, clean and environment-friendly in process, low in demand on equipment, adjustable in implementation scale and high in practicability.

The invention discloses a special organic fertilizer for grapes. Organic fertilizer extract liquid is used as base liquid, and potassium sulphate, potassium dihydrogen phosphate, urea, superphosphate, magnesium sulfate heptahydrate, zinc sulfate heptahydrate, sodium borate and the like are added in the organic fertilizer extract liquid. The special organic fertilizer for grapes consists of elements including, by weight percentage, from 22.0 to 24.0% of nitrogen, from 11.0 to 12.0% of phosphorus, from 11.0 to 12.0% of potassium, from 0.6 to 1.2% of calcium, from 0.7 to 1.4% of magnesium, from 1.8 to 2.8% of sulphur, from 0.08 to 0.1% of zinc and from 0.18 to 0.2% of boron. The utilization rate of the fertilizer can be increased, the zinc in the fertilizer can increase the number of grapes in each grape bunch, the boron can improve shriveling of the grapes, the number of shriveled grapes is reduced, similar maturity of the grapes can be prompted, growth of the grapes is promoted, yield of the grapes is increased, and quality of the grapes is improved.

The invention discloses a formula of a flower maintenance nutrient solution. The flower maintenance nutrient solution comprises a fertilizer and citric acid, and comprises the following components: major elements, trace elements, 30-70 mg / L of citric acid and the balance of water, wherein the major elements comprise 40-70 mg / L of calcium nitrate, 180-950 mg / L of potassium nitrate, 80-110 mg / L of monopotassium phosphate and 10-30 mg / L of magnesium sulfate; and the trace elements comprise 1-5 mg / L of boric acid, 1-4 mg / L of manganese sulfate, 0.1-0.5 mg / L of zinc sulfate heptahydrate, 0.005-0.05 mg / L of ammonium molybdate, 0.03-1 mg / L of copper sulfate heptahydrate and 5-40 mg / L of ethylenediamine tetraacetic acid disodium ferrum. The formula of the flower maintenance nutrient solution has the advantages of reasonable components, good stability, wide application range and convenience in use.

The invention discloses plant infusion nutrient solution and a preparation method thereof and aims to provide nutrient solution which can be directly infused into the plants, stimulate the tree activity, promote the plants to rapidly take root and sprout, quickly supply nutrition to the trees, and enhance the tree stress resistance, and a preparation method of the nutrient solution. The proportion of the nutrient solution is that: every 1,000ml of deionized water contains 0.05 to 0.1g of monopotassium phosphate, 0.02 to 0.045g of potassium nitrate, 0.15 to 0.3g of calcium nitrate tetrahydrate, 0.11 to 0.2g of magnesium sulfate heptahydrate, 0.03 to 0.06g of ferrous sulphate heptahydrate, 0.07 to 0.15g of disodium ethylene diamine tetraacetate, 0.015 to 0.025g of manganese sulfate tetrahydrate, 0.012 to 0.018g of zinc sulfate heptahydrate, 0.04 to 0.06g of copper sulfate pentahydrate, 0.015 to 0.022g of ammonium molybdate, 0.015 to 0.02g of indolebutyric acid, and 0.008 to 0.015g of 6-benzylaminopurine. The plant infusion nutrient solution satisfies the needed nutrient in the process of transplanting big trees, has high absorption utilization ratio, quick response, stable form, high activity, and is easily absorbed by the plants.

The invention discloses a compound corrosion inhibitor suitable for a seawater corrosion medium and a preparation method of the compound corrosion inhibitor. The compound corrosion inhibitor is composed of the following components in percentage by mass: 40-60% of linseed oil Mannich base quaternary ammonium salt, 1-5% of sodium gluconate, 2-10% of zinc sulfate heptahydrate, 5-10% of sodium molybdate and 20-40% of isopropanol, wherein the percentage sum of all the components is equal to 100%. The compound corrosion inhibitor has the beneficial effects of low cost, environment friendliness and good corrosion inhibiting effect.

The invention provides a slow-release organic fertilizer for ginseng Chinese herbal medicines and a preparation method thereof. The slow-release organic fertilizer for ginseng Chinese herbal medicines is composed of lignin, kieselguhr, humic acid, calcium base silicic acid salt mine, nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, microelements and water, wherein the microelements comprise boron sulfate, magnesium sulfate heptahydrate, molybdenum sulfate, ferrous sulfate, heptahydrate and single superphosphate. The preparation method comprises dissolving and stirring the components, mixing and granulating to obtain the slow-release organic fertilizer. The slow-release organic fertilizer for ginseng Chinese herbal medicines is reasonable in components; the utilization ratio of the organic fertilizer and the productivity of the ginseng Chinese herbal medicines are greatly increased through the synergistic effects of each component; at the same time, problems of eutrophication symptoms and nutrient deficiency symptoms of crops are effectively solved; the quality of the ginseng Chinese herbal medicines is greatly improved; at the same time, water pollution problems caused by fertilizer loss are effectively prevented; soil is improved, resources are saved, and costs are reduced. The preparation method is simple and suitable for the requirements of large-scale industrial production.

The invention relates to a process for recovering silver, lead and bismuth from silver-bearing soot comprehensively, and belongs to the technical field of comprehensive recovery of noble metals. The process comprises the following steps of: removing chlorine from silver soot by using clear water, and performing acid leaching on the silver in the silver soot by using sulfuric acid and an oxidizing agent; adding sodium chloride into silver-bearing solution to obtain pure silver chloride, and performing the conversion of hydrochloric acid, iron powder metathesis and the washing of acidized purified water on the silver chloride to obtain high-purity sponge silver; after the silver is precipitated, purifying solution, removing impurities and crystallizing to obtain zinc sulfate heptahydrate; and smelting the lead and bismuth which are left in lead bismuth dregs to form a lead bismuth alloy by reverberatory furnace, electrolyzing to obtain precipitated lead and bismuth-bearing anode mud, and refining the bismuth-bearing anode mud and removing impurities to obtain refined bismuth. The process is suitable for processing the silver-bearing soot of which the silver content is over 0.8 percent; and compared with the prior art, the process has the advantages of environment friendliness, silver direct yield of more than or equal to 99.2 percent, high recovery rate, low machining cost and quick capital turnover.

The invention relates to a high-efficiency fruit-nutritive physiological hyperchromic fertilizer and a preparation method thereof. Currently, the hyperchromic products in the market such as phytohormone, including products of ethane, abscisic acid, daminozide, most of such products adopt or contain hormone, have instable effect and easily cause adverse side effects, thus leading fruits to be soft and lowered in bin stability. The invention is a high-efficiency fruit-nutritive physiological hyperchromic fertilizer, the active ingredients of which comprise aminofusin, potassium sulfate, potassium chloride, borax, zinc vitriol, iron vitriol (FeSO4 question mark 7H2O), compound sodium nitrophenolate, chlormequat chloride with 50 percent of aqua and white sugar; the ingredients do not contain hormone, are non-poisonous and pollution-free, and have no adverse side effects. The high-efficiency fruit-nutritive physiological hyperchromic fertilizer contains various aminophenols, active substances for plant growth, a plurality of major elements and chelate trace elements, which are necessary for the growth and development of the fruit trees and vegetables, and is a novel organic and inorganic hyperchromic product integrating the advantages of various foliar fertilizers of inorganic nutrition type, organic type and growth conditioner type, etc. into a whole.

The invention provides a special slow-release organic fertilizer for pear trees and a preparation method thereof. The special slow-release organic fertilizer comprises lignin, diatomite, attapulgite, humic acid, calcium bentonite, a nitrogen fertilizer, a phosphatic fertilizer, a potassium fertilizer, microelements and water, wherein the microelements comprise agricultural rare earth, borax, ferrous sulfate, copper sulfate, manganese sulfate and zinc sulphate heptahydrate. The preparation method comprises the following steps: dissolving, stirring, mixing and granulating the components. A formula of the special slow-release organic fertilizer is reasonable, the utilization rate of the organic fertilizer and the yield of the pear trees are greatly increased through the synergistic effect of the components, the problem of over-nutrition or nutrient deficiency symptom of crops is effectively solved, the mouth feel of pears is greatly improved, the problem of water body pollution caused by fertilizer loss is effectively prevented, the soil is improved, the resources are saved, and the cost is reduced; the preparation method is simple and meets the needs of large-scale industrial production.

The invention discloses a compound corrosion inhibitor prepared from the following raw materials by mass fraction: 30-50% of flax seed oil amide, 20-40% of phosphonic glycollic acid, 5-10% of heptahydrate, 10-20% of polyaspartic acid and 10-30% of isopropyl alcohol, wherein the sum of the components by percent is 100%. The compound corrosion inhibitor has the beneficial effects of low cost, environmental friendliness and good corrosion inhibition effect.

The invention relates to the field of agriculture, in particular to a water flush fertilizer containing chitosan oligosaccharide. The water flush fertilizer consists of the following components in percentage by weight: 20-35% of amino acid raw powder, 10-20% of calcium nitrate dehydrate, 5-15% of monopotassium phosphate, 0.1-0.5% of chitosan oligosaccharide, 3-8% of iron vitriol, 1-5% of zinc sulfate heptahydrate, 1-5% of boric acid, 15-30% of potassium nitrate, 3-8% of urea and 0.01-0.05% of brassinolide. According to the water flush fertilizer provided by the invention, chitosan oligosaccharide is innovatively added into the water flush fertilizer, so that nutrition can be provided to plants continuously, the action time is long, different essential growth periods of the plants can be promoted, the environment is not affected, effective protecting films can be formed on the surfaces of the plants, and the anti-disease property and the resistance of the plants are improved.

The invention discloses a wheat grass soilless culture nutrient solution. The wheat grass germination agent adopts the technical scheme as follows: the following components of calcium nitrate terahydrate, nitrate of potash, monoammonium phosphate, epsom salt, ammonium nitrate, boric acid, manganese sulfate, heptahydrate, ammonium molybdate, heptahydrated copper sulfate, ethylenediamine tetraacetic acid disodium iron, yeast hydrolysate, chitosan, humic acid and sodium selenite are mixed and dissolved into distilled water to prepare the soilless culture nutrient solution according to parts by weight. The wheat grass germination agent and the soilless culture nutrient solution are simple in preparation method, and ideal in product modality; the soilless culture nutrient solution of wheat grasses not only contains nutrient substances required for plant growth, but also contains active ingredients such as an amount of amino acid, glutathione, glucosan, nucleic acid, the chitosan, the humic acid, selenium and the like; the current situation that practical techniques and methods for high production of the wheat grasses are in shortage in the present market is changed; the wheat grass germination agent has a wide economic development prospect.