314 results about "CALCIUM/MAGNESIUM/PHOSPHORUS" patented technology

The invention relates to a passivator for remediation of farmland soil subjected to combined pollution of heavy metals such as cadmium, chromium, copper and nickel, and a preparation method and a use method of the passivator. The passivator is prepared from a passivator A and a passivator B, wherein the passivator A is prepared from montmorillonite, kieselguhr, sepiolite, illite and ferrous sulfate; the passivator B is prepared from periclase, calcite, calcium magnesium phosphate fertilizer, plant ash and calcium hydroxide; the passivator is suitable for the farmland soil subjected to the combined pollution of the cadmium, the chromium, the copper and the nickel, and is prepared from the multiple different porous absorption materials with specific contents and a passivation material; the components of the passivator have complementary advantages, and the principles such as absorption and stabilization are combined; the combination forms of the heavy metals are effectively enhanced by ion exchange, complexing, chelating and adsorption methods, and the combination forms are converted into more stable strong organic binding states and residue states, so that the effective state contents of the heavy metals in the farmland soil are effectively reduced, and the passivation effect is long-acting and stable; therefore, the passivator has a great repair effect for the farmland soil subjected to combined pollution of the cadmium, the chromium, the copper and the nickel.

The invention discloses a passivator for repairing a compound heavy metal polluted farmland. The passivator comprises the following components in parts by weight: 15-25 parts of rock-type mineral particles, 8-15 parts of nano-iron, 5-15 parts of a calcium magnesium phosphate fertilizer, 25-40 parts of coal ash, 15-25 parts of biochar and 10-15 parts of red mud. The passivator for repairing the compound heavy metal polluted farmland disclosed by the invention can effectively reduce the plant effectiveness of heavy metals lead, arsenic, cadmium and chromium in soil, and meanwhile, the soil nutrients are improved and the physical and chemical properties of the soil are maintained.

The invention relates to an acid soil conditioner. The acid soil conditioner is prepared from, by weight, 20-40 parts of quick lime, 25-45 parts of straw charcoal powder, 5-15 parts of attapulgite, 5-15 parts of calcium magnesium phosphate fertilizer, 5-15 parts of silicon fertilizer, 5-15 parts of pig manure organic fertilizer, 5-15 parts of turf and 1-10 parts of K2HOP4. The invention further relates to a preparation method and application of the acid soil conditioner. The low-cost raw materials are combined according to a specific ratio, a use method is easy and convenient, the soil pH can be adjusted, nutritional elements needed by plants are added while the pH adjusting and heavy metal adsorption capacity is guaranteed, soil organic matter can be increased, formation of the soil granular structure can be promoted, the permeability of soil can be enhanced, plant growth can be promoted, and the risk of soil caking caused by application of a soil conditioner can be reduced.

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 composite passivator for restoring heavy metal cadmium contaminated soil, which comprises the following components in percentage by weight: 25.0-75.0% of a calcium magnesium phosphate fertilizer and 25.0-75.0% of turf. The composite passivator for restoring heavy metal cadmium contaminated soil disclosed by the invention can significantly reduce the effective state cadmium content of soil and the cadmium content of vegetables, and also can increase the pH value of soil; the composite passivator is used for controlling wide heavy metal cadmium contaminated vegetable soil; and by using the passivator, the heavy metal cadmium content of vegetable products is lower than a national food safety standard value, therefore, the passivator is of great significance to the guarantee of food safety, and has a board application prospect.

The invention relates to the production of a compound fertilizer, in particular to the production of a microorganism organic-inorganic compound fertilizer, belonging to the organic fertilizer production field. The invention consists of pretreated chicken manure, maize straw power, dry coal slurry, microorganism zymogen inoculum, carbamide, lemery, fused calcium magnesium phosphorus potash fertilizer, humic acid and attapulgite soil. The invention has the advantage of having available for raising the content of organic matter in fertilizer through adding proper amount of coal slurry into the materials of the microorganism organic-inorganic compound fertilizer, which can be proved by actual production. Replacing such phosphate fertilizer as superphosphate with fused calcium magnesium phosphorus potash fertilizer in the materials of the microorganism organic-inorganic compound fertilizer does not influence the effect of phosphate fertilizer, can raise fertility and promote crops to grow owing to the added trace elements necessary for crop growth.

The invention discloses a special organic/inorganic compound fertilizer for sugarcane produced by use of the filter mud from a sugar factory. The special organic/inorganic compound fertilizer is prepared from the following raw materials in percentage by weight: 4.17-42.87% of urea, 11.52-60.87% of calcium superphosphate or calcium magnesium phosphate, 3.33-16.66% of potassium chloride and 25.0-37.5% of dry filter mud. The special organic/inorganic compound fertilizer is prepared by the following steps of: (1) stacking the filter mud for natural fermentation; rotting the stacked filter mud for ripening from top to bottom; spreading the rotten filter mud; drying in the sunlight until the water content is 15-25%, and grinding the filter mud by a grinder; adding nitrogen, phosphorus and potash fertilizer into the filter mud after fermentation and grinding according to the proportion of the raw materials; mixing and then grinding, granulating, drying, cooling and screening; and packaging to obtain a finished product. The special organic/inorganic compound fertilizer disclosed by the invention has the advantages of long fertilizer efficiency, soil improvement, soil fertility improvement, avoidance of soil hardening and the like, can effectively improve the yield per unit by 0.5-1.0 ton of sugarcane and the sugar content of the sugarcane by 0.5-1.0%, and also can improve the utilization rate of the chemical fertilizer by 3-5%.

The invention relates to a straw biology organic fertilizer and the manufacture method that could effectively solves the fully use of straw, fertilizing, and good harvest problem. The method is mixing straw powder, dejection, shale powder, fused calcium magnesium phosphate, mixed cake, bran powder, urea, and other assistant material and compounding enzyme nutrient solution. The method is that adding dejection, shale powder, fused calcium magnesium phosphate, mixed cake, bran powder, urea, and assistant material to the smashed straw, mixing with enzyme nutrient solution taking fermenting, deodorizing, detoxicating, graining, drying, filtering, and packaging. The invention has good effect, easy method, plenty resource, wide application, and has great prospect.

The present invention relates to a soil repairing agent and a preparation method thereof, and belongs to the field of agriculture. The technical problem solved by the present invention is to provide a soil repairing agent and a preparation method thereof. The soil repairing agent of the present invention comprises, by weight, 5-20 parts of trithiocyanuric acid, 10-30 parts of a phosphate, 15-30 parts of a carbonate, 45-60 parts of sepiolite, and 2-5 parts of an adhesive, wherein the phosphate is preferably a calcium-magnesium-phosphorus fertilizer and/or phosphorus ore powder, the carbonate is preferably calcium carbonate and/or magnesium carbonate, and the adhesive is preferably carboxymethyl starch, dextrin or diatomite. Further the invention discloses the preparation method of the repairing agent. According to the present invention, the soil repairing agent provides good repairing effects on the heavy metal cadmium-polluted soil, particularly the contents of heavy metals such as lead, cadmium and the like in the soil can be substantially reduced, various components are harmless to human body and environments, and the soil repairing agent has the characteristic of green environmental protection.

The invention belongs to the technical field of ore dressing chemical industry, particularly a method for preparing a phosphate fertilizer soil conditioner by utilizing phosphate tailings and acid wastewater. The method comprises the following steps of: using ore pulp of the phosphate tailings as the raw material, adding the acid wastewater drained from enterprises such as sulfuric acid plants, phosphate fertilizer plants, metallurgical plants and the like, and mixing the acid wastewater and the phosphate tailings in a tailing buffer pool; conveying mixed slurry to a tailing pond from the tailing buffer pool; by stockpiling for 6 months to 12 months, performing reaction on phosphorite in the phosphate tailings and sulfuric acid in the acid wastewater so as to obtain the soil conditioner with effects of a calcium-magnesia phosphate fertilizer, i.e. tailings with water content of less than 10 percent in dry basis in the tailing pond. The method is simple to operate, enables the waste tailings to be changed into the soil conditioner with utilization value without investing equipment or using drug and simultaneously treats the acid wastewater which pollutes the environment, and has important significance for comprehensive utilization of resources and environment protection.

The invention discloses a red-soil-region peanut continuous-cropping obstacle reducing special fertilizer, a preparation method and a usage method. The special fertilizer is composed of, in percent by weight, 10-30% of decomposed dry bird excrement, 10-30% of humic acid, 10-20% of urea, 20-40% of calcium-magnesium-phosphorus fertilizer, 10-15% of potassium chloride, 0.5-2% of borax, 0.5-2% of zinc sulfate, 0.01-0.05% of ammonium molybdate, 0.005-0.02% of compound sodium nitrophenolate, 0.001-0.01% of sodium alpha-naphthyl acetate, 0.01-0.05% of hymexazol, and 0.01-0.05% of diazinon. The special fertilizer is applied red-soil-region field on which peanut is continuously cropped for three or more years with the usage amount of 2000-2500 Kg/hm<2>, the usage method comprises that the fertilizer is completely basally applied for one time, or the fertilizer is applied for two times according to the base-fertilizer topdressing-fertilizer weight ratio of 2:1, the base fertilizer is applied in furrows before peanut is sowed or is spread over the whole field when ploughing is performed, topdressing is combined with intertillage weeding, and fertilization and earthing up are performed. The special fertilizer is verified to be capable of increasing peanut output by 15-25% compared with a conventional fertilizer by applying the special fertilizer to a large field on which peanut is continuously cropped for 10 years or more at 2012 and 2013, and the application method is simple, reasonable, and high in operability, and exhibits technical progress.

The utility model discloses a method for applying a basic fertilizer to furrow surfaces for castanopsis fissa container seedling cultivation. The method is characterized in that the basic fertilizer of cultivating seedlings is applied to furrow surfaces of cultivating seedlings, a container of cultivating seedlings is placed on furrow surfaces of cultivating seedlings, furrow heights of cultivating seedlings are in a range between 5 cm and 15 cm, the furrow surface width is 100 cm, lengths are in a range between 10 m and 15 m, the footpath width is in a range between 0.3 m and 0.4 m, the basic fertilizer is more than one of a calcium magnesium phosphorus fertilizer, charring sawdust and fermented paulownia bran, and the individual usage amount is 90-100g/m2 of the calcium magnesium phosphorus fertilizer, 700-900g/m2 of the fermented paulownia bran and 500-700/m2 of the charring sawdust. Seedlings with heights ranging between 4cm and 6cm which are cultivated in a traditional method aretransplanted to container cups which are neatly placed on furrow surfaces of cultivating seedlings and have matrixes, and the basic fertilizer is applied to furrow surfaces of cultivating seedlings. The method is simple, easy to operate, uniform in fertilization, time-saving, labor-saving and high in working efficiency, prevents root systems of seedlings from directly contacting fertilizers and reduces fertilizer damage. Simultaneously, the fertilizer effect is not reduced, the fertilizer is released slowly, the cost of cultivating seedlings is low and economic and social benefits are good.

The invention discloses a passivator for repairing cadmium and arsenic polluted farmlands, a preparation method and a repair method, and the passivator comprises the following components in percentageby mass: 20-30% of charcoal, 10-20% of active bacteria; 10% -20% of reduced iron powder, 10% -20% of calcium magnesium phosphate fertilizer and 20% -30% of bentonite. The invention aims to provide the passivator which is low in cost, environment-friendly and free of secondary pollution.

The invention provides a special Tripterygium wilfordii composite fertilizer for peanuts and its preparation and application, belonging to the field of cultivation technology of peanuts. In the prior art, the methods of mixing of peanut seeds with reagents and spreading of toxic soil are used for controlling underground insects for peanuts; since drug effects last for a short time, the effect of controlling is not ideal. The fertilizer provided in the invention comprises, by weight, 4 parts of Tripterygium wilfordii powder with a fineness of 200 meshes, 20.9 parts of peanut hull powder with a fineness of 100 meshes, 15 parts of urea, 24 parts of potassium sulfate, 5 parts of diammonium phosphate, 30 parts of a calcium-magnesium-phosphorus fertilizer, 1 part of boric acid and 0.1 part of ammonium molybdate. The above-mentioned raw materials are uniformly mixed and granulated. During soil tillage before peanuts sowing, every 50 kilograms of the fertilizer is uniformly spread onto a field having an area of 667 m<2> and ploughed into soil. The advantages of the invention are as follows: a lasting drug effect and a good effect of killing underground insects for peanuts are achieved; peanut growth is promoted, and output of peanuts is increased; there is no pesticide residue in the soil; a preparation process is simple; application of the fertilizer is convenient, labor and time for individual application of pesticides are left out, and therefore, application of the fertilizer is labor- and time-saving.