50results about How to "Reduce ammonia volatilization" patented technology

The present invention relates to a coating composite for making coated granular fertilizer and its production method, and the fertilizer made up by using said coating composite. The coating composite is formed from coating agent, solidfying agent, nitrogen synergist, inorganic acid or organic acid, surfactant and adjuvant. As compared with non-coated fertilizer the nitrogen utilization rate of fertilizer produced by adopting said invention can be raised by 6%-10%, the fertilizer can be saved by 15-45%, and its fertilizer efficiency time can be obviously prolonged, and can be reached to 60-120 days.

The invention discloses a method for preparing organic fertilizer from paper-making sludge. The materials such as paper-making sludge, amendment are mixed, subjected to high-temperature aerobic fermentation, post maturation and crushing, screened, and mixed with fertilizer of nitrogen, phosphorus, potassium and the like and medium and micro elements to prepare the organic fertilizer. The method has the advantages of simple process, easy operation, obvious innocuous effect, no environmental pollution and little nutrient loss; and the organic fertilizer prepared by the method is widely applied to industrial crops such as vegetables, fruit trees, Chinese herbal medicines, flowers and field crops such as wheat, corn, paddy rice.

The invention relates to a formula and a film-coating preparation method for biological carbon coated urea. The biological carbon coated urea is characterized in that the outside of a fertilizer core is coated with solid-powder-shaped biological carbon, sulfur, dicyandiamide and bentonite by using granular urea with a size of 3 to 4 mm as the fertilizer core and oxidized corn starch as bonding liquid, wherein the above-mentioned components have weight proportions as follows: 50 to 80 parts of the urea, 10 to 30 parts of the biological carbon, 2 to 10 parts of the sulfur, 2 to 3 parts of the dicyandiamide, 2 to 3 parts of the bentonite and 3 to 5 parts of the corn starch. The film-coating preparation method for the biological carbon coated urea comprises the following steps: placing the urea into a disc granulator, carrying out preheating with hot air for 5 min, spraying the bonding liquid on the surface of the urea with a high-pressure spray gun, blowing the hot air for 3 to 5 min, adding a mixed film-coating material into the disc granulator in batches and carrying out rotating for 10 min, then spraying the bonding liquid again, and carrying out drying in the air so as to obtain the biological carbon coated urea. According to the invention, the biological carbon can improve physical and chemical properties of soil and adsorb ammonium-nitrogen and nitrate-nitrogen ions; the dicyandiamide reduces nitrification; and S4O62- generated by decomposition of the sulfur can delay decomposition of the dicyandiamide, and H+ and S2O32- generated by decomposition of the sulfur can inhibit nitrification. The biological carbon coated urea provided by the invention has the advantages of low ammonia volatilization, slow generation of nitrate nitrogen, low nitrogen loss and high nitrogen effectiveness.

The invention relates to the technical field of agricultural fertilizer, particularly to a multifunctional synergist of a compound fertilizer suitable for calcareous soil of dry land, and application of the multifunctional synergist. The synergist is composed of, in percentage by mass, 40-70% of super-absorbent resin, 15-25% of citric acid and the salts thereof, 10-20% of a nitrification inhibitor, 4-10% of polyborate and 1-5% of EDDHA (ethylenediamine di-o-phenyl acetate)-microelement chelate. The synergist prepared according to the invention can be used as an additive of a compound fertilizer or applied together with various common compound fertilizers or formula fertilizers to exert the function of preventing and controlling the loss ways of nitrogen, phosphorus and potassium simultaneously, and can realize one-time total-nutrient fertilizer application; and the synergist has multiple functions of stabilizing fertilizer by slow release, holding water and resisting drought, improving soil with nutrients, saving labour, increasing production, etc.

The invention provides a special slow control / release fertilizer for an eggplant. The fertilizer is characterized by comprising, in terms of mass percent, 0.05% to 0.08% of n-butyl triamine thiophosphate, 0.05 to 0.08% of hydroquinone and 0.24 to 0.28% of dicyandiamide. According to the invention, the special slow control / release fertilizer is prepared by combining macro-element, medium-element and trace-element fertilizers like nitrogen, phosphorus, potassium, calcium, magnesium, molybdenum, boron, zinc and iron with organic fertilizers like high-quality decomposed rapeseed dregs, chicken manure and grass carbon, adding a urease inhibitor and a nitrification inhibitor and carrying out mixing; the special slow control / release fertilizer has a slow release effect in soil, is rich in a variety of nutrient elements needed in growth of the eggplant, can meet demands of the eggplant for nutrients in different growth and development phases for a long time and effectively improves output of the eggplant.

The invention discloses a mountain economic forest rainwater gathering deep percolation device. A water and fertilizer pit is formed in the uphill face of a fruit tree, a waterproof layer is arranged at the bottom of the water and fertilizer pit, a drainage pipe is vertically installed in the middle of the water and fertilizer pit, and the periphery of the drainage pipe is filled with an organic filler layer. A rain gathering film is laid at the upper end of the water and fertilizer pit, the fruit tree (economic tree) is planted on the slope face of the downhill position on one side of the water and fertilizer pit, a fish scale pit is formed along a trunk of the fruit tree (economic tree) and the water and fertilizer pit, and a water measuring pipe is vertically installed between the trunk and the water and fertilizer pit. According to the device, water-saving irrigation, the water and fertilizer integration technology and water and soil conservation are organically combined, compared with surface irrigation, the effects of water saving, water holding, fertilizer holding, fertilizer promoting, reduction of ammonia volatilization, reduction of water evaporation loss and effective prevention of water and soil loss are achieved, the device is low in cost, simple in technology, easy to operate, good in effect and easy to grasp, and therefore the device has wide application prospects in arid and semi-arid fruit industry regions of China.

The present invention relates to a slow releasing fertilizer, and especially a kind of urease / nitrating inhibitor composite slow releasing urea and its preparation process. The urease / nitrating inhibitor composite slow releasing urea consists of urea 99.40-99.78 wt%, urease inhibitor N-methyl-2-pyrrolidone 0.02-0.08 wt%, and nitrating inhibitor dicyandiamine 0.14-0.58 wt%. The preparation process includes mixing common urea with N-methyl-2-pyrrolidone and dicyandiamine in certain weight proportion at 138-140 deg.c under oil bath condition, cooling, crushing and sieving. The present invention has simple preparation process and low apparatus cost, and the product is used as once base fertilizer needing no top dressing and is suitable for vegetable, field crop and fruit tree.

The invention belongs to the field of organic fertilizer production, and in particular relates to a process for producing an organic fertilizer by livestock and poultry manure composting. According to the principle of high-temperature composting, composting is a process that organic matters are mineralized, humified and decontaminated into compost fertilizer by high temperature fermentation under the effect of microorganisms; in the process of organic matter decomposition by microorganisms, a large amount of effective nitrogen, phosphorus and potassium compounds capable of being absorbed and utilized by crops are generated, and a new organic polymer humus is synthesized, which is an important active material forming soil fertility. According to invention, livestock and poultry manure is used as a main raw material, added with an appropriate amount of filling materials (such as a straw powder) and inoculated with a humus microbial inoculum, so as to complete high temperature fermentation of the compost in a short time, and realize harmlessness and recycling. The process can produce a biological organic fertilizer needed by agriculture and crop farming, as well as solve the problem of environment pollution caused by livestock and poultry manure.

The invention discloses a rainwater collecting and deep infiltrating method for an economic forest in a mountainous region. The method comprises the steps that water and fertilizer pits are dug under tree crowns; after the distribution positions of the water and fertilizer pits are determined, excavating construction of the water and fertilizer pits is carried out along the uphill flat ground of fruit trees firstly; after the water and fertilizer pits are excavated, waterproof layers are laid at the bottoms of the pits; drainage pipes are put in the middles of the water and fertilizer pits; the peripheries of the drainage pipes are filled with porous organic filler layers and compacted, and then are covered with soil, treaded and trimmed into a concave shape when the peripheries are filled to pit opening parts; square soil ridges with the height of 5 cm are built at the parts away from the walls of infiltrating pits by 10 cm; the square soil ridges are covered with plastic films cut into 120 cm*120 cm; the peripheries of the soil ridges are sealed with soil and properly compacted, and semicircular fish-scale pits are built along trunks with the water and fertilizer pits as centers. By means of the method, the water-saving irrigation technology, the water and fertilizer integrated technology and water and soil conservation are organically combined together, and the effects of saving water, retaining water and fertilizer, promoting fertility, reducing ammonia volatilization and effectively preventing water and soil loss are achieved.

The invention relates to the field of vanadium slag wet process metallurgy and vanadium chemical industry, in particular to a method for vanadium extracting through low liquid-solid-ratio ammonification. According to the method, after raw materials containing vanadium is roasted, clinkers, water and ammonium salt are mixed according to a certain proportion; materials with a low liquid-solid ratio are formed and subjected to the low-temperature ammonification reaction, the vanadium in the clinkers reacts with the ammonium salt to form ammonium metavanadate, and the ammonium metavanadate formed at the low temperature exists in mixed slurry in a crystalline mode; after the mixed slurry is subjected to hydrotherm dissolution, a solution rich in the ammonium metavanadate is obtained; and after slurry filtering, filtrate cooling and crystallizing and separating and ammonium vanadate roasting, vanadium pentoxide products are obtained. Compared with a conventional vanadium extracting through ammonification, according to the method for vanadium extracting through low liquid-solid-ratio ammonification, the using quantity of the water and the ammonium salt are greatly reduced in the ammonification process, and volatilization of ammonia gas is obviously inhibited; and the slurry can be directly subjected to hydrotherm leaching to obtain the ammonium metavanadate solution after ammonification, the process of vanadium extracting through ammonification is greatly simplified, the process is easy to operate and control, efficient and clean extracting of the vanadium can be achieved, and the extracting rate of the vanadium reaches 90% or more.

The invention discloses a composting method for adding auxiliary materials to quickly remove tetracycline antibiotics in biogas residue. The composting method comprises the following steps: mixing biogas residue with fresh pig manure, wheat dry straws and wood vinegar which is diluted by 500 times according to parts by weight, evenly stirring to obtain mixture, adding charcoal into the mixture, and evenly mixing to obtain composting raw materials, wherein the dry substance ratio of the mixture to the charcoal is (80-100):1; putting the composting raw materials in an aerobic fermentation tank to be subjected to aerobic composting to obtain a composting product of which the antibiotics are removed. According to the composting method, the auxiliary materials can be added to shorten compost body warming time and prolong a high temperature phase, antibiotic degradation in a biogas residue composting process is accelerated, antibiotic residues in the composting product can be lowered, and the subsequent utilization risk of the biogas residues is lowered.

The invention provides a method for acidifying cow dung sewage by cucurbitaceous vegetable straws. The method specifically includes: firstly, carrying out anaerobic fermentation on liquid produced bymechanical squeezing of fresh cucurbitaceous vegetable straws to obtain an acidifying agent, then adding the acidifying agent into cow dung sewage for acidifying treatment, conducting stirring continuously until the pH value of the cow dung sewage is 5.0-6.5, then covering the cow dung sewage with the dried and cut cucurbitaceous vegetable straw solid residue uniformly, and then performing storagefor a period of time. According to the invention, after application of cucurbitaceous vegetable straws to acidifying treatment on cow dung sewage, the treated cow dung sewage has pH of less than or equal to 6.5 in the storage process, the ammonia volatilization is reduced by more than 95% or more, the nitrogen content is increased by 40% above, after direct return of the treated cow dung sewage to field for application, compared with unacidified cow dung sewage, the fertilizer efficiency is improved by 60% or above, the treated cow dung sewage replaces industrial sulfuric acid and phosphoricacid, not only reaches the purposes of acidifying cow dung sewage, increasing the nutrient content of dung sewage, but also solving the problem of difficult treatment of cucurbitaceous vegetable straws.

An additive for reducing greenhouse gas emissions of livestock manure compost and application thereof are disclosed. The additive is a mixture composed of zeolite, ferrous sulfate, Bacillus subtilis WJC11 and Bacillus cereus WJC2 in a mass ratio of 50:30:1:1. The additive is used under the conventional operation process of compost. Compost production can be ensured while compost quality is improved, and emission of greenhouse gas in the composting process is preferentially reduced. Thereby, the environmental pollution caused by the gas release during the composting process is effectively controlled.

The invention relates to the field of technologies for producing biological organic fertilizers, in particular to a special microbial fertilizer for radix angelicae sinensis and a method for preparing the special microbial fertilizer. The special microbial fertilizer comprises an organic fertilizer, weathered coal and organic carriers. The organic fertilizer is livestock excrement, and the organic carriers contain rape pseudomonas fermentation liquor and bacillus muralis fermentation liquor. The special microbial fertilizer particularly comprises, by weight, 50-80 parts of the livestock excrement, 20-60 parts of the weathered coal, 5-15 parts of the rape pseudomonas fermentation liquor and 5-15 parts of the bacillus muralis fermentation liquor. According to the technical scheme, the special microbial fertilizer and the method have the advantages that as shown by results of fertilizer efficiency comparative tests in places such as Weiyuan, Minxian and Longxi in the Gansu province over 3 years, obvious soil-borne disease resistance and yield increase effects are realized by the special microbial fertilizer which is applied to the radix angelicae sinensis, radix angelicae sinensis root rot prevention and treatment effects of the special microbial fertilizer are 45%-48%, and the yield increase is 12%-16%.

The invention discloses a conditioner for reducing ammonia volatilization during chicken manure composting and a preparation method of the conditioner. The conditioner is prepared from mushroom dreg, turf, vermiculite, strawcarbon powder, phosphorite powder, modified zeolite powder, calcium bentonite, wood vinegar, monocalcium phosphate and a microbial agent. The conditioner is reasonable in compatibility of all components and good in ammonia volatilization prevention effect, improves the composting quality, and has advantages of physical, chemical and biological conditioners at the same time; the preparation method is simple, and the process is easy to control. The conditioner is applicable to promotion and application in organic fertilizer plants and livestock farms, takes chicken manure as a raw material, and reduces ammonia volatilization produced during composting.

The invention discloses a method for treating cupric oxide or zinc oxide ores by adopting agitation ammonia leaching and infiltration basin ammonia leaching in combination. The method is realized through the following steps: firstly fine crushing raw ores, and then dividing the materials into stream ores and fine ore pulp by adopting the combination screening method, wherein the stream ores undertake infiltration basin ammonia leaching by a thick ammonia leaching solution under the conditions of normal temperature, normal pressure and airtightness, and the fine ore pulp undertakes the first stage of agitation ammonia leaching by a mediate ammonia leaching solution under the conditions of normal temperature, normal pressure and airtightness; the fine ores and the stream ores after preliminary leaching undertake wet-type grinding and grading by a mediate ammonia leaching solution; and finally, the fine ore pulp undertakes the second stage of agitation ammonia leaching under the conditions of normal temperature, normal pressure and airtightness. The method has the advantages of improving the leaching efficiency of copper or zinc, reducing the solid-liquid separation ore amount of the fine ores, reducing the volatilization loss during repeated use of ammonia and improving the industrial health conditions; and further, the process has certain flexibility, so that the energy consumption for ore grinding is saved.

The invention discloses a water-retention fertilizer-maintenance slow release fertilizer and a preparation method thereof, and belongs to the technology of water-retention fertilizer-maintenance slow release fertilizer. The water-retention fertilizer-maintenance slow release fertilizer comprises phospholipid hydroxyethyl cellulose, stem-grafting polyving akohol butenedioic acid monoester ammonium salt and base fertilizer, wherein the weight of the phospholipid hydroxyethyl cellulose accounts for 5-10% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer, the weight of the stem-grafting polyving akohol butenedioic acid monoester ammonium salt accounts for 5-10% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer, and the weight of the base fertilizer accounts for 80-90% of the total weight of the water-retention fertilizer-maintenance slow release fertilizer. The invention further provides the preparation method of the water-retention fertilizer-maintenance slow release fertilizer, and the method comprises the steps of enabling hydroxyethyl cellulose and phosphoric acid to be phospholipid, carrying out maleic anhydride monoester stem grafting after polymerization alcoholysis of vinyl acetate, and carrying out mixing or wrapping on the phospholipid hydroxyethyl cellulose, the stem-grafting polyving akohol butenedioic acid monoester ammonium salt and the base fertilizer. The water-retention fertilizer-maintenance slow release fertilizer is reasonable in design and safe and convenient to use.

The invention relates to carbon-based synergistic compost manure as well as a production method and an application thereof. The production method of the carbon-based synergistic compost manure comprises the following steps: crushing waste branches of fruit trees into wood dust; doping and mixing the wood dust, a nitrogen fertilizer, excrement and biomass charcoal to obtain composting materials; composting the composting materials; and after completely composting, obtaining the carbon-based synergistic compost manure, wherein the use amount of the nitrogen fertilizer is based on pure nitrogen:the mass ratio of the wood dust to the nitrogen fertilizer to the excrement to the biomass charcoal is (40 to 45) to (3 to 8) to (30 to 35) to (15 to 20). According to the carbon-based synergistic compost manure, conventional composting materials and the biomass charcoal are commonly composted and are complementary to each other; and the biomass charcoal can be used for reducing the ammonia volatilization of conventional compost manure and keeping nutrients in the compost manure, so that a habitat and activity place for composting microorganisms is provided, the humification of the compostingmaterials is promoted, the content of humic substances in the compost manure is improved and the degradation of harmful substances in the compost manure is promoted. The conventional composting materials can be used for supplementing nutrients of the biomass charcoal and eliminating defects of high carbon and low mineral nutrients of the biomass charcoal.

The invention provides a cow barn dung-urine separating device, and relates to the technical field of cow living environment facilities. The c cow barn dung-urine separating device comprises a driving device, a dung scraping device and a cow barn floor. A dung channel for installing the dung scraping device is arranged on the cow barn floor. The driving device drives the dung scraping device to move on the dung channel. At least one end of the cow barn floor is provided with a dung collecting channel for collecting dung and a urine guide groove and a collecting pipe specially for collecting urine. According to the cow barn dung-urine separating device, the dung scraping device is driven by the driving device to reciprocate in the dung channel, all-weather uninterrupted dung clearing is realized, urine on the dung channel can flow into the collecting pipe through the urine guide groove, and dung is scraped in the dung collecting channel; dung and urine are separated, ammonia volatilization is reduced, the air quality of a cow barn is improved, the wet and slippery situation of the dung channel is changed, cows are prevented from falling down, and health of the cows is guaranteed.

The invention relates to the technical field of water-based ink, in particular to preparation method of neutral emulsion. The preparation method of the neutral emulsion comprises the steps that a protective colloid is prepared by using water in specific parts by weight, an emulgator A, cationic starch, a cationic initiator-water solution, a molecular weight regulator, a mixed monomer A and ammoniawater by adopting a specific method; and then, the neutral emulsion is prepared by using the water in specific parts by weight, the protective colloid prepared in the step (a1), the cationic initiator-water solution, a mixed monomer B, a mixed monomer C and an emulgator B by adopting the specific method, and the stability of the emulsion can be further kept without adding the ammonia water to adjust to alkalinity. A pH value of the neutral emulsion is between 6.8 and 7.3, the stability is high, compared with existing alkaline emulsion, the volatilization amount of ammonia gas of the neutral emulsion is lower, the odour is lower, the damage to bodies of operating personnel is lower, the potential safety hazards are reduced, the corrosivity to equipment and a printer to prepare water-basedoil paint is less, and the printing process is more stable after the neutral emulsion is applied to prepare the water-based oil paint.

The invention discloses a livestock and poultry manure composting additive and an application thereof. The livestock and poultry manure composting additive is a mixture formed by a mixture A formed byferrous sulfate and zeolite, calcium superphosphate, bacillus subtilis WJC11 and bacillus cereus WJC2 according to a mass ratio of (1-50):(30-50):1:1. The livestock and poultry manure composting additive is used under a conventional operation technology of composting, a composting yield can be guaranteed and composting quality is improved, and a greenhouse gas released in a composting process ispreferentially reduced, thereby pollution to the environment caused by gas release in the composting process is effectively controlled.

The invention discloses a gypsum coated slow-release fertilizer and a preparation method and application thereof. The fertilizer consists of an inner core and a coating layer. The inner core componentis prepared from the following components in parts by mass: 35 to 55 parts of urea, 0.2 to 0.5 part of urease inhibitor NBPT, 1 to 3 parts of nitrification inhibitor DMPP, 0.3 to 0.5 part of nitrification inhibitor CP, 0.1 to 0.2 part of stigmasterol, 0.5 to 1 part of polyglutamic acid, 5 to 10 parts of monosilicic acid, 15 to 30 parts of fulvic acid and 1.5 to 3 parts of chitosan; and the coating layer comprises the following components in parts by weight: 15-25 parts of gypsum and 4-6 parts of an adhesive. The slow-release fertilizer has the comprehensive effects of reducing salt, improvingalkali, controlling nutrient leaching loss, keeping soil storage, increasing soil retention, promoting crop absorption and the like; gypsum is used for reducing salt and improving alkali, the ureaseinhibitor, the nitrification inhibitor and the like are combined to reduce nitrogen loss, fulvic acid, polyglutamic acid, chitosan and the like are combined to improve the resistance and nutrient absorption capacity of crops, and a virtuous cycle system for reducing nitrogen nutrient loss, preserving storage and improving efficiency of the saline-alkali soil is formed.

The invention discloses a method for storing and utilizing biogas slurry of livestock and poultry by virtue of winter idle rice fields and a management system. According to the method, biogas slurry produced in biogas tanks are directly stored in or used to irrigate winter idle rice fields after rice harvesting, and after the rice fields is dried, repeated storage or irrigation is carried out until rice is planted in spring of next year. The method can completely solve the contradiction between continuous production of the biogas slurry and periodic fertilizer requirement of crops by storing the biogas slurry of livestock and poultry in the idle rice fields in winter, and at the same time, can reduce the difficulty of utilizing the biogas slurry in farmland and improve the enthusiasm of farmers to use the biogas slurry. The management system provided by the invention exerts the technical advantages of an agricultural technology promotion department, breaks information isolation among the farmers, livestock and poultry farms, biogas liquid transportation companies and crop growth information, and comprehensively uniformly synergistically manages utilization of the biogas slurry in farmlands, enables the advantages of utilization of the biogas slurry in farmlands to be optimally achieved, realizes development of a planting-breeding coupling eco-circulating agricultural model in aregion, and promotes market-oriented promotion and application of utilization of the biogas slurry in farmlands.

The invention relates to the technical field of crop planting, in particular to an eggplant planting method. In added base fertilizer and nutrient soil, urea, diammonium phosphate, potassium sulphateand potassium chloride cooperate with rapeseed dregs, chicken manure and humic acid to work together, hence, not only can the yield of eggplants be remarkably raised, but also the soil quality can beimproved, the soil fertility is improved, the soil microorganism environment is improved, and the growth of a plant root system is promoted. Besides, the rapeseed dregs, the chicken manure and the humic acid can be used for effectively increasing soil organic colloid, soil particles are cemented into granular structures, thus, the soil is good in water retention property, fertilizer maintenance property and air permeability, and the soil temperature can be effectively regulated. The materials work together, therefore, the contents of eggplant protein, fat, carbohydrate, vitamins, alpha-solanine and the like can be significantly increased, and the eggplants are large and good in color. According to the eggplant planting method, chemical fertilizer is combined with organic fertilizer, thus,needs of the eggplants for nutrients in diverse growth periods can be served, the usage amount of the fertilizer and the number of fertilization times are effectively reduced, the production cost is reduced, and environmental pollution is reduced.

The present invention relates to a coating composite for making coated granular fertilizer and its production method, and the fertilizer made up by using said coating composite. The coating composite is formed from coating agent, solidfying agent, nitrogen synergist, inorganic acid or organic acid, surfactant and adjuvant. As compared with non-coated fertilizer the nitrogen utilization rate of fertilizer produced by adopting said invention can be raised by 6%-10%, the fertilizer can be saved by 15-45%, and its fertilizer efficiency time can be obviously prolonged, and can be reached to 60-120 days.

The invention discloses a method for treating copper oxide or zinc oxide ore by combining agitation ammonia leaching and percolation tank ammonia leaching. The raw ore is first ultrafinely crushed, and then a combined screening method is used to divide the material into placer ore and fine-grained slurry. , the sand ore is leached with concentrated ammonia leaching liquid in the percolation tank under sealed conditions at normal temperature and pressure, and the fine-grained slurry is leached with concentrated ammonia leaching liquid in the first stage of stirring ammonia leaching under sealed conditions at normal temperature and pressure. , and then wet grinding and grading the fine-grained ore and placer after initial leaching with medium ammonia leaching liquid, and then the ground slurry is subjected to the second stage of stirring ammonia leaching under normal temperature and pressure closed conditions. The advantages of this invention are that it not only improves the leaching rate of copper or zinc, reduces the amount of solid-liquid separation of fine-grained ores, reduces the volatilization loss of circulating ammonia, improves industrial sanitary conditions, but also has certain flexibility in the process. It can save grinding energy consumption.

The invention relates to preparation of a modified sludge hydrothermal carbon material and the application of the modified sludge hydrothermal carbon material in non-point source pollution emission reduction. Wet sludge subjected to anaerobic digestion treatment is mixed with a reaction medium solution containing 0.8-1.2 M of magnesium citrate solution and 0.8-1.2% of H2SO4, wherein the ratio of the wet sludge to the reaction medium solution is 1: (1-4) w / v. The mixture of the wet sludge and the reaction medium solution is put into a high-pressure reaction kettle, and the hydrothermal carbonization is performed at 250-300 DEG C and 4-10 MPa for 1-2 hours to obtain the modified sludge hydrothermal carbon material. The modified sludge hydrothermal carbon material is collected and then is dried for later use. The modified sludge hydrothermal carbon material can be applied to rice field soil, the ammonia volatilization can be inhibited, the nitrogen loss in water on the surface of a rice field is reduced, the nitrogen utilization efficiency of rice is improved, the rice yield is increased, and the modified sludge hydrothermal carbon material has positive significance in sustainable rice production.

The invention belongs to the technical field of deplating and discloses a chemical-physical combined method of deplating a copper and copper-zinc alloy-based silver coating. The method comprises the following steps: S1, preparing a deplating solution; S2, putting the deplating solution in a reactor, immersing a plated part in the deplating solution, and stirring and deplating the plated part to obtain a silver-containing solution and the deplated plated part; S3, recovering silver in the silver-containing solution according to a conventional method; and S4, putting the deplated plated part indeionized water and carrying out ultrasonic action till residual coating is deplated to obtain solid high purity metal silver. The method is simple to operate, can be used for deplating silver coatings of copper and a copper-zinc alloy quickly and is small in matrix corrosion. The reaction process is easy to control, the treatment cost is low, the alkaline environment is safe, ammonia volatilization is very small, the environmental pollution is reduced, and the working conditions of workers are improved. In the deplating process, the liquid silver-containing solution and the high purity silverproduct in a solid form can be obtained at the same time, and the follow-up silver recovery treatment cost is lowered effectively.

The invention belongs to the field of crop cultivation, and relates to a special fertilizer for sugarcane and an application method thereof. The special fertilizer is prepared by uniformly mixing urease-inhibiting urea, zinc humic acid diammonium and potassium chloride, and two methods of base fertilizer application and topdressing application are used. The one-time application method can reduce the frequency of fertilization, reduce the labor of fertilization, and according to the nutrient absorption law of sugarcane, improve the nutrient distribution ratio, enhance the photosynthesis of sugarcane, reduce ammonia volatilization, and improve the utilization rate of fertilizer. It is safe, ecological, and low in cost. practical application value.

The invention provides a livestock shed liquid dung collection and transportation device and a collection and storage system, and relates to the technical field of breeding environment facilities andequipment. The livestock shed manure collection and transportation device comprises a dirt collecting trough, a conveying trough and a driving mechanism, wherein the conveying trough is arranged in the dirt collecting trough and penetrates the dirt collecting trough in the extending direction of the dirt collecting trough; the conveying trough is used for collecting liquid dung in the dirt collecting trough and connected with the driving mechanism; the driving mechanism is used for driving the conveying trough to move in the extending direction of the dirt collecting trough; included angles between two side walls and the extending direction of the bottom wall of the conveying trough are smaller than or equal to 90 degrees. According to the livestock shed liquid dung collection and transportation device, liquid dung in the dirt collection trough can be cleared out of a livestock shed more conveniently, timely and efficiently, subsequent clearing and treatment difficulty is reduced, theammonia volatilization amount is reduced, health of livestock is guaranteed, and corrosion of NH3 to metal products in the livestock shed is avoided. Besides, the air environment inside and outside the livestock shed can also be improved, too many ventilation devices are saved, and accordingly, the cost is reduced.