262 results about "Chelating iron" patented technology

The invention relates to an all-nutritional compound type liquid fertilizer for being sprayed to plant leaf surfaces and a preparation method thereof. The fertilizer contains major elements, secondary elements, trace elements such as chelate iron, zinc, manganese, copper, molybdenum, boron and chlorine which are necessary to the growth of plants, biological hydrolytic amino acid and a plant growth regulator, wherein the total amount of nitrogen, phosphorus and potassium elements contained in 16 elements which are necessary to the growth of the plants is more than 110 grams / liter; the total amount of calcium, magnesium and sulphur elements contained in 16 elements is more than 30 grams / liter; the total amount of the zinc, the manganese, the iron, the copper, the boron, the molybdenum and the chlorine contained in 16 elements is more than 50 grams / liter; the amount of the amino acid in the fertilizer is more than 100 grams / liter; and the amount of the plant growth regulator in the fertilizer is more than 20 grams / liter. The fertilizer is a non-toxic, pollution-free and environment-friendly fertilizer; by spraying the fertilizer to the leaf surfaces, the nutrition of crops can be replenished comprehensively, physiological diseases are prevented and controlled, the expansion and elongation of plant cells can be promoted, the formation of chlorophyll is induced, flower and fruit retention are realized, and the yield of crops is improved.

The invention discloses functional granular major-element water soluble fertilizer. The fertilizer comprises, by weight, 345-350 parts of urea, 210-220 parts of potassium nitrate, 240-250 parts of monopotassium phosphate, 20-30 parts of potassium sulphate, 110-115 parts of monoammonium phosphate, 11-11.6 parts of boric acid, 6-6.6 parts of EDTA chelated zinc, 7-7.7 parts of EDTA chelated iron, 3-3.9 parts of EDTA chelated manganese, 0.1-0.2 part of ammonium heptamolybdate and 5-10 parts of polyglutamic acid. Compared with the prior art, the functional granular major-element water soluble fertilizer is scientific in formula, complete in nutrition, balanced and stabilized in nutrient, capable of moisture retention and drought resistance and high in utilization rate and has the functions such as improving and restoring soil.

The invention relates to a rich-selenium biological organic fertilizer and a preparation method thereof. The selenium fertilizer is prepared by mainly proportioning, processing and synthesizing 10-30 percent of chelate selenium solution, 10-30 percent of chelate zinc solution, 20-40 percent of chelate iron solution, 10-30 percent of boric acid solution, 1-10 percent of antagonist, 10-30 percent of water and 30-50 percent of chelate selenium. The selenium fertilizer has the activation function of enriching nutrient components and activating enzyme, improves the utilization ratio of a nitrogen element by 11-15 percent, improves the absorbing conversion ratio of selenium by 20 percent and can increase the yield of rice and lead the organic selenium content in the rice to reach 100-300 microgrammes / kg simultaneously; the produced rice has the characteristics of better quality, , rich selenium, environmental protection, and the like.

The invention provides a preparation method of a carbon sphere loaded nanoscale zero valent iron composite material. The method comprises: (1) preparing carbon spheres containing hydrophilic functional groups (-OH, -COOH) by a hydrothermal method; (2) chelating iron ions and the functional groups by soaking; (3) finally, dropping potassium borohydride or sodium borohydride solution into carbon sphere mixed solution with the iron ions, and forming the carbon sphere loaded nanoscale zero valent iron composite material by a strong reducing effect. The material prepared by the preparation method provided by the invention not only simultaneously has an adsorption effect of the carbon spheres and the strong reducing effect of nanoscale zero valent iron, but also can form a micro primary cell between the iron and carbon; not only are the problems of clustering and the like of nanoscale zero valent iron particles solved, but also electron transfer is reinforced and a degrading effect on polluted waste water is promoted; the method provided by the invention is low in cost and simple to operate, and the nano particles have high dispersity and stability.

The invention relates to the technical field of soilless culture and in particular relates to a soilless culture nutrient solution and a preparation method thereof. According to the soilless culture nutrient solution, the following components are added into every 1L of water by weight: 6-10g of calcium nitrate, 3-5g of potassium nitrate, 3-5g of magnesium sulfate, 2-4g of ammonium phosphate, 0.8-2g of potassium sulfate, 0.8-2g of monopotassium phosphate, 0.08-0.15g of EDTA (Ethylene Diamine Tetraacetic Acid) chelating iron, 0.05-0.08g of ferrous sulfate, 0.02-0.04g of boric acid, 0.1-0.3g of manganese sulfate, 0.003-0.006g of zinc sulfate, 0.001-0.0015g of copper sulfate, 0.001-0.003g of ammonium molybdate, 1-2g of EM probiotic liquid, 6-8g of oligosaccharide and 8-10g of anticorrosive antiseptic substance. Due to adoption of the technical scheme of the invention, the soilless culture nutrient solution has the beneficial effects that the soilless culture nutrient solution is enriched in nutrient substances and wide in application range, and the optimal requirements of flowers on temperature, moisture, illumination, nutrient and air in the growth and development process can be effectively controlled. Moreover, according to the soilless culture nutrient solution, the disease and insect resistance of crops is improved, the yield is high, and the product quality is high.

The invention provides high concentration drip irrigation fertilizer exclusively used in the fruit enlargement period of grapes utilized in a drip irrigation system and a preparation method thereof. The main components of the drip irrigation fertilizer exclusively used in the fruit enlargement period of grapes are as follows (according to the parts by weight): 611-723 parts of potassium nitrate, 90-108 parts of monoammonium phosphate, 33-41 parts of urea, 124-256 parts of magnesium sulfate heptahydrate, 0.3-0.6 part of boric acid, 3.6-5.8 parts of EDTA chelated iron, 0.2-0.4 part of EDTA chelated copper, 0.6-1.0 part of chelated manganese, 0.002-0.004 part of sodium molybdate and 1.0-1.6 parts of EDTA chelated zinc. The drip irrigation exclusively used fertilizer has dramatic effects, canobviously improve the yield and quality of grapes, and can save fertilizer and improve efficiency. The drip irrigation exclusively used fertilizer combines the domestic all-pervading trend of the irrigation system and the main national principle of saving fertilizer and improving efficiency and has quite wide market prospect.

The invention provides a high concentration drip irrigation special fertilizer for the vegetative growth phase of grapes. The fertilizer comprises the following main components in part by weight: 244 to 267 parts of potassium nitrate, 181 to 198 parts of monoammonium phosphate, 357 to 390 parts of urea, 139 to 209 parts of magnesium sulfate heptahydrate, 0.3 to 0.6 part of boric acid, 3.6 to 5.8 parts of EDTA chelated iron, 0.2 to 0.4 part of EDTA chelated copper, 0.6 to 1.0 part of EDTA chelated manganese, 0.002 to 0.004 part of sodium molybdate, and 1.0 to 1.6 parts of EDTA chelated zinc. The special fertilizer is especially designed for a drip irrigation system, and is suitable for the requirement on each element at the vegetative growth phase of the grapes. The special fertilizer can obviously improve the photosynthesis of plants and the nutrient substance accumulation amount of leaves, establishes a firm substance foundation for quick inflation of fruits and fruit growth in later period, and has the effect better than that with only the application of a base fertilizer or only the application of a straight fertilizer so as to achieve the aims of reducing fertilizer and improving effect. Currently, the country widely popularizes drip irrigation technology and fertilizer reducing and effect improving technology, and the fertilizer plays a role in reducing fertilizer and improving effect in a grape drip irrigation system and has a wide market prospect.

The invention relates to a stress-resistance multielement quick-acting water-soluble fertilizer and belongs to the technical field of agricultural fertilizers. The stress-resistance multielement quick-acting water-soluble fertilizer is prepared from the following raw materials in percentage by weight: 15% of urea, 10% of monopotassium phosphate, 65% of nitrate of potash, 2% of calcium ammonium nitrate, 2% of magnesium sulfate, 1.8% of borax, 0.5% of ammonium molybdate, 0.5% of chelate nickel, 0.5% of chelate iron, 0.5% of chelate zinc, 0.5% of chelate copper, 0.5% of chelate manganese, 1% of chitosan and 0.2% of S-abscisic acid. The fertilizer contains 13 elements which are essential to plants, can be fully dissolved in water, and can be used for solving various nutrient deficiency symptoms of crops, so that the fertilizer utilization rate is increased, resources can be saved, and the condition that the soil is salinized and acidized, is lack of medium trace elements and the like due to over using of fertilizers can be avoided; field trial results prove that the fertilizer is obvious in fertilizer efficiency, can remarkably improve the yield of crops, can improve the quality of fruits, and reduces the occurrence of plant diseases and insect pests; the crops to which the fertilizer is applied can not be subjected to reduction of output under the atrocious weather.

The invention discloses a fulvic acid potassium-containing total-nutrient fertilizer for special purpose of potatoes and a production method thereof, and belongs to the technical field of crop formula special fertilizers. The fertilizer is prepared from the following raw materials: urea, monoammonium phosphate, monopotassium phosphate, potassium sulfate, boric acid, EDTA chelated zinc, EDTA chelated iron, EDTA chelated manganese, ammonium heptamolybdate, anhydrous magnesium sulfate, inhibitor NAM and fulvic acid potassium. The fertilizer has the advantages of balanced and comprehensive nutrition, smooth appearance, hardening prevention, long fertilizer efficiency, high utilization, labor output reduction, soil improvement and environmental pollution reduction.

The invention discloses a high-activity seaweed fertilizer specially used for peanuts and a preparation method thereof and belongs to the technical field of production of crop specially-used fertilizers. The high-activity seaweed fertilizer is prepared from following raw materials comprising: urea, monoammonium phosphate, a calcium magnesium phosphate fertilizer, potassium sulfate, borax, EDTA chelating iron, EDTA chelating manganese, EDTA chelating zinc, ammonium heptamolybdate, a seaweed extraction liquid and seaweed residues. Compared with a fertilizer in the prior art, the high-activity seaweed fertilizer specially used for the peanuts is reasonable in formula, is complete in nutrition, can achieve an effect of increasing yield of the peanuts and improving quality of the peanuts.

The invention discloses a fruit swelling type seaweed organic liquid water soluble fertilizer, and belongs to the technical field of formula fertilizers of crops. The fruit swelling type seaweed organic liquid water soluble fertilizer is prepared from the following raw materials: a seaweed extracting solution, urea, ammonium polyphosphate, potassium nitrate, magnesium sulfate monohydrate, EDTA chelated iron, EDTA chelated manganese, EDTA chelated zinc, EDTA chelated copper, boric acid, ammonium heptamolybdate and potassium fulvic. The fruit swelling type seaweed organic liquid water soluble fertilizer is comprehensive in nutrition, scientific and reasonable in formula, fully water-soluble and easy to apply, improves soil, integrates fast acting and long acting, and effectively promotes the crop growth.

The invention discloses special cotton fertilizer produced by using biochemical fulvic acid through melt granulation, relating to the technical field of special fertilizer of crop formula. The special fertilizer is obtained by taking 450-650 parts of nitramine phosphorus, 50-160 parts of potassium chloride, 80-300 parts of potassium sulfate, 50-150 parts of monoammonium phosphate, 1-100 parts of biochemical fulvic acid, 1-15 parts of EDTA (Ethylene Diamine Tetraacetic Acid) chelating zinc, 1-15 parts of EDTA chelating manganese, 1-20 parts of EDTA chelating iron, 1-20 parts of borax and 0.1-0.5 part of ammonium heptamolybdate as raw materials, mixing, stirring, heating, granulating, cooling and screening. The special fertilizer disclosed by the invention has the advantages of comprehensive nutrients, favorable water solubility, greenness, no pollution, high utilization rate, improvement on soil, increase of crop yield and improvement on quality.

The invention discloses feed additive for improving cad pig growth performance and mixed batch. The feed additive comprises following ingredients by parts of weight: 23 to 25 of pericarpium citri reticulatae, 23 to 26 of hawthorn, 27 to 35 malt, 4 to 8 Chinese rhubarb, 15 to 23 Chinese yam, 0.001 to 0,002 Vb12, 9 to 11 chelate iron and 80 to 120 sodium butyrate. The additive is scientific and reasonable in proportion, can improve cad pig growth performance, improves feed conversion and increases hemoglobin content in blood. Fermented soybean meal containing active small peptide can be absorbed and utilized by intestinal tracts easily. The Chinese herb medicine mainly has the function of regulating qi, tonifying spleen and nourishing the stomach. The sodium butyrate can repair small intestine choria of pigs, increases recess depth, reduces potential of hydrogen (pH) in intestinal tracts and prevents harmful bacteria from breeding.

The invention provides a premix containing organic microelements and a feed prepared from the premix, wherein the premix is formed by small peptide chelate type organic microelements and high-efficiency protein selenium. The piglet complete feed is characterized in that in each ton of piglet complete feed, 200-2000g of the premix is added, each 500g of premix contains 50-200g of small peptide chelate iron, 50-250g of small peptide chelate zinc, 20-50g of small peptide chelate copper, 25-100g of small peptide chelate manganese, and 5-15g of protein selenium. The small peptide chelate type organic microelements include Optimin zinc, Optimin manganese, Optimin copper and Optimin iron, all of which contains 2-3 amino acids. According to the premix and the piglet complete feed provided by the invention, dosage of inorganic microelements is reduced, pollution of inorganic microelements and heavy metals to the environment is obviously reduced, further, the feed utilization ratio and productivity of piglets are improved, the oxidative deterioration of the feed is reduced, the palatability of the feed is improved, and the growth healthy state of the piglets is promoted.

The invention discloses a bleaching process for the pure cotton fabric, which is characterized in including the flow of scouring and bleaching, hot water rinsing, peracid, oxygenating, and washing. The invention specifically includes: (1) choosing a metallic ion chelating agent SS-201 with strong ability in chelating iron ion; (2) in the peracid stage, using neutralization acid with strictly controlled time and temperature for the neutralization acid; (3) ensuring full time for oxygenating, and choosing the deoxygenase dosage according to the practical situation of a fabric; (4) when carrying out softening treatment on the fabric, choosing an anionic softener instead of cation, weak cation or common silicone oil to carry out softening treatment on the fabric, and adding moderate fixed acid to control the pH value of the fabric surface within the range of 5.0-5.5. The bleaching process efficiently solves the yellowing of the pure cotton fabric, the product has stable quality, and the processing cost is reasonable.

The invention relates to a method for preparing a food nutrition reinforcer glycine chelated iron(ó�), which belongs to the field of preparation of amino acid chelated iron(II). In the invention, glycine and ferrous chloride or ferrous carbonate are used as raw materials, antioxidant is added and nitrogen gas is passed for protection in process of chelation reaction, different organic solvents are employed for precipitating and eluting in separation and purification of products to separate chelated iron(II) and inorganic iron efficiently and remove impurity anion for producing products with excellent oxidation stability and water solubility. The content of glycine chelated iron(ó�) is over 80% in the synthetic products rehydration rate of glycine chelated iron(ó�) is above 95%, and the stability of glycine chelated iron(ó�) and aqueous solution are better than ferrous sulfate.

The invention discloses a special environment-friendly fertilizer for high yield of lotus roots. The fertilizer comprises raw materials in parts by weight as follows: 30-60 parts of composite urea, 20-40 parts of ammonium nitrate, 15-30 parts of a calcium, magnesium and phosphate fertilizer, 20-40 parts of monopotassium phosphate, 10-18 parts of potassium chloride, 10-30 parts of potassium citrate, 10-40 parts of composted chicken manure, 10-30 parts of bagasse, 20-60 parts of tapioca flour, 1-2 parts of calcium hydrophosphate, 0.2-0.6 parts of sodium silicate, 0.01-0.09 parts of EDTA (ethylene diamine tetraacetic acid) chelating manganese, 0.1-0.22 parts of EDTA chelating iron, 0.1-0.8 parts of borax, 0.1-0.45 parts of fermented composite bacteria and 5-10 parts of a biological pesticide. The fertilizer has a good slow-release effect and remarkable fertilizer efficiency, can improve the structure of soil and causes no pollution to the environment, and the yield of the lotus roots is high.

A composite medicine for treating the hemorrhagic anemia, iron-deficiency anemia and nutritional anemia is prepared from the arnono acid chelated iron, one or more Chinese-medicinal materials for nourishing blood, and pharmacologically, acceptable salt. Its advantages are high curative rate and biologic utilization rate, and low irritation to enterogastric tract.

A method for treating onychomycosis of a nail of an animal, which comprises a topical application of a solution to said nail, wherein said solution is comprised of at least one chemical agent capable of chelating iron metal ions

The invention discloses a nutrient solution for a hydroponic plant, which comprises Nitrogen, phosphate and potassium needed by routine plants, and also comprises one or the combination of the following components in weight portion: chelated iron, ferrous sulfate, ferric chloride, boric acid, borax, manganese chloride, manganese sulfate, zinc sulfate and copper sulfate; the invention also discloses the production technique of the nutrient solution. The nutrient solution is rich in major elements and microelements needed by crop plants, the proportional assortment of various components is reasonable, which is suitable for equilibrium absorption of crops, and can improve the growth of the crops effectively; during the preparation of the nutrient solution, the components are dissolved in an slightly acidic environment so as to avoid the reaction among the components and prevent the nutrition from being lost due to turbidness of the nutrient solution.

The invention relates to a method for absorbing and purifying hydrogen sulfide with an EDTA (ethylene diamine tetraacetic acid) chelated iron copper compound system, which comprises the following steps: dissolving 1-10wt% of soluble iron salt in deionized water to prepare an iron salt solution; adding soluble copper salt and EDTA disodium salt into the iron salt solution in an iron salt / copper salt / EDTA disodium salt mass ratio of (1-5):1:1, thereby obtaining an EDTA chelated iron copper compound absorption solution; and introducing hydrogen sulfide gas with the concentration of 800-4000ppm to carry out absorption reaction. The method provided by the invention has the advantages of high removal efficiency, mild reaction conditions, low absorption solution cost, low raw material consumption, wide application range and the like, and is simple to operate.

The invention provides a disease prevention selenium-rich compound fertilizer capable of improving apple tree planting soil and a preparation method of the disease prevention selenium-rich compound fertilizer.The compound fertilizer comprises, by weight, urea, organic fertilizer, ammonium dihydrogen phosphate, monoammonium phosphate, potassium chloride, zinc sulfate, humic acid, attapulgite, sodium selenite, an EM microbial agent, EDTA chelate iron, EDTA chelate zinc, EDTA chelate copper, humic acid urea iron, humic acid magnesium, a urease inhibitor, a nitrification inhibitor and multi-effect triazole.The compound fertilizer is an organic-inorganic compound fertilizer, the effective period is long, the fertilizer is rich in microelement, the varieties and content of nutrient elements in the soil can be increased, and the nutritional value of apples is improved; a microbial strain and fungicide are contained and combined, so that the disease prevention capacity in the apple tree planting process is improved, the fertilizer components are friendly to the soil, soil quality can be improved, the content of organic matter in the soil is increased, the quality of the apples is improved, the yield of the apples is increased, the production cost is low, market promotion is promoted, and economic benefits are good.

A selenium-rich slow-release organic fertilizer used for paddy rice planting is provided. The selenium-rich slow-release organic fertilizer comprises urea, poultry manure, corn straw, bagasse, rapeseed cakes, EM bacterial strains, ribavirin, triazolone, sodium selenite, a slow release agent, EDTA chelated iron, EDTA chelated zinc, EDTA chelated copper, amino acid chelated manganese, amino acid chelated iron, amino acid chelated molybdenum, a urease inhibitor and a nitrification inhibitor. The selenium-rich slow-release organic fertilizer organically combines the urea and an organic fertilizer, and comprises a plurality of trace elements and a sterilization and disease preventing additive. Inorganic and organic fertilizers are combined. Soil of a paddy rice field is protected, and the content of nutrients in the soil is increased. Microorganism strains and a sterilizing agent are combined in the selenium-rich slow-release organic fertilizer, thus boosting disease resistance of the paddy rice field. The production cost is low so that market popularization is facilitated and economic benefit is good.

The invention relates to a novel long-acting alkaline compound fertilizer and a preparation method thereof, which are applied to the field of agriculture and forestry production. The novel long-acting alkaline compound fertilizer comprises long-acting stabilizer, soil conditioner and medium or trace elements. When the long-acting alkaline compound fertilizer is prepared, urea or ammonium chloride, monoammonium phosphate or diammonium phosphate, monopotassium phosphate, potassium nitrate, chelate iron, chelate manganese, chelate copper, chelate zinc, disodium octoborate tetrahydrate, calcium magnesium powder and the like are mixed according to a certain scientific proportioning, then are added with a certain quantity of plant nutrient conditioner and the long-acting stabilizer, are sufficiently mixed with the plant nutrient conditioner and the long-acting stabilizer, and then are granulated to form the novel long-acting alkaline compound fertilizer. A production process is simple, raw materials are easy to obtain, nutrient is comprehensive, nitrogen, phosphorus, potassium and the medium or trace elements are provided for soil and plants, the utilization rate of the fertilizer is improved effective, the pH (potential of hydrogen) of the fertilizer is larger than or equal to 7, and accordingly the fertilizer is suitable for acid soil, and has the advantages of improving the soil and preserving an ecological environment.

The invention discloses a chelated compound trace element fertilizer and a preparation method thereof. The chelated compound trace element fertilizer comprises the following components: EDTA (ethylene diamine tetraacetic acid) chelated copper, EDTA chelated zinc, EDTA chelated iron, EDTA chelated manganese, borax decahydrate and ammonium molybdate. The preparation method comprises the steps of preparing EDTA chelated copper, EDTA chelated zinc, EDTA chelated iron and EDTA chelated manganese; purchasing borax decahydrate and ammonium molybdate; mixing the raw materials, drying, grinding and packaging to obtain a finished product. The prepared trace element fertilizer can be sprayed or flushed, and has a good effect on improving the symptoms such as small leaves, yellow leaves, undergrowth and the like of vegetables caused by deficiency of trace elements.

The invention discloses a selenium-containing trace element corn leaf fertilizer and a cultivation technique thereof for selenium-rich corn. The selenium-containing trace element corn leaf fertilizer comprises the following raw materials in percentage by mass: 24-26% of chelate zinc, 3.5-4% of ammonium molybdate tetrahydrate, 24-26% of chelate iron, 12-13% of borax, 8.5-9% of sodium selenite and 24-26% of monopotassium phosphate. The cultivation technique comprises the following steps: preparing before seeding, selecting good seeds, seeding, densely planting reasonably, preventing diseases and removing insects, weeding, dressing the fertilizer, performing water-saving irrigation, and harvesting and storing. By adopting the selenium-containing trace element corn leaf fertilizer, the yield of corn is greatly increased, the content of the selenium element in corn is increased, the nutrition of corn self is maintained, and the content of the selenium element needed by human bodies can be met, therefore, the immunity is improved, and cancer can be prevented. As the fertilizer is completely absorbed by the crop, the cultivation technique is relatively safe and reliable.

The invention provides a selenium enrichment cultivating method for Pennisetum sinese Roxb. The selenium enrichment cultivating method for Pennisetum sinese Roxb includes the following steps that base fertilizer containing Huifengyuan biological fertilizer is applied to a field, Pennisetum sinese Roxb seedlings are transplanted into the field, then field water and fertilizer cultivation and management are conducted, and selenium fertilizer is sprayed to leaf surfaces; the selenium fertilizer is prepared from, by weight, 2-3.5 parts of sodium selenite, 1.5-2 parts of ammonium molybdate, 4-5.0 parts of chelating iron, 5.0-6 parts of borax sand and 4-5.0 parts of monopotassium phosphate. The purpose of Pennisetum sinese Roxb selenium enrichment is achieved through root selenium supplementing and leaf surface selenium supplementing, and high-yield and high-nutrition protein selenium-enriched forage grass is provided for development of selenium-enriched animal husbandry.

The invention discloses an agricultural non-point source pollution conditioning agent and a preparation method thereof, and belongs to the field of an agricultural fertilizer. The method is characterized in that the agricultural non-point source pollution conditioning agent is obtained by using rice stalk biomass charcoal, dry sheep manure and polyacrylamide as major materials and using calcium carbonate, zeolite powder and EDTA-chelate iron as regulating agents through mixed fermentation and drying. The adsorption effect of charcoal and the zeolite powder on soil nitrogen, phosphorus, heavy metal ions and the like is fully utilized; through the PAM bridging effect, the charcoal and sheep manure particle bonding and large-pore structure is manufactured; the specific surface area of the charcoal micropore structure is enhanced; through chelate iron and calcium carbonate, the surface functional group of the charcoal is enriched, so that the adsorption effect is further reinforced; meanwhile, the product contains higher nutrient substances; a slow release effect is achieved; the soil nutrient substance loss cannot be caused. The product can be used for preventing, controlling and conditioning the loss of farmland elements such as nitrogen and phosphorus, can be used for heavy metal polluted soil restoration and can also be used as a compound organic fertilizer.

The invention discloses a liquid fertilizer and a preparation method therefor. The liquid fertilizer is prepared from the following raw materials, by weight, 10-20 parts of microbial fermentation broth, 130-210 parts of urea, 145-205 parts of water-soluble ammonium polyphosphate, 150-200 parts of potassium phosphate, 45-70 parts of potassium nitrate, 20-50 parts of potassium chloride, 3-60 parts of ammonium dihydrogen phosphate, 3.5-6.5 parts of boric acid, 5-10 parts of chelating zinc, 4-8 parts of chelating iron, and 365-420 parts of water. The liquid fertilizer has a high nutrient content and can be absorbed by crops directly, absorption and utilization of the fertilizer is raised, capabilities of drought resistance, high temperature resistance, cold resistance, disease resistance, salt resistance, lodging resistance and the like of crops are raised, and the liquid fertilizer has obvious effects on stable yield and high yield of crops and keeping of excellent characteristics of varieties and is suitable for modern agricultural fertilizer application technology.

The invention discloses special fertilizer for rice seedling raising. The special fertilizer is prepared from the following raw materials in parts by weight: 60-70 parts of organic fermentation substances, 15-20 parts of fucoidin, 8-12 parts of amino acid chelate manganese, 4-6 parts of basic zinc sulfate, 12-18 parts of amino acid chelate iron, 12-16 parts of ammonium molybdate, 5-8 parts of selenomethionine, 0.5-1 part of humic acid, 3-6 parts of basic copper sulfate, 0.05-0.08 part of biochemical fulvic acid, 0.02-0.04 part of amino acid chelate calcium; 4-6 parts of lysine, 0.05-0.08 part of chitin, 4-6 parts of iodine yeast, 0.2-0.5 part of fungus polysaccharide, 0.5-1 part of S-abscisic acid, and 6-12 parts of a bacterium solution obtained by mixing azotobacter, cellulose decomposition bacteria and root nodule bacteria. The stress resistance of the special fertilizer adopting the formula to a plant is very high, so that the plant growth can be regulated, and the cold resistance, the disease resistance, the drought resistance and the water-logging resistance of the plant can be enhanced.