403 results about "Soil acidification" patented technology

The invention relates to a biochar soil conditioner and a preparation method thereof. The soil conditioner is prepared from, by weight, 2-10 parts of biochar, 1-5 parts of pyroligneous liquor, 5-10 parts of composite microorganisms, 3-5 parts of binder and 4-10 parts of organic matter. The soil conditioner can maintain soil fertility by means of the adsorption effect of biochar, adsorb nitrogen, phosphorus and potassium in soil, promote the activity of microorganisms in the soil and microorganism decomposition, improve the soil porosity, reduce the soil bulk density, increase the soil permeability, solve such problems as soil fertility loss and poor physical and chemical properties, effectively solve such a phenomenon as soil acidification, improve the quality of agricultural products, promote early ripening of crops, and increase the yield of the crops.

The invention relates to a maize soil testing fertilization method which is realized by three steps of soil nutrient detection, fertilizing amount calculation and fertilization. The proportion of N, P and K is scientifically and reasonably adjusted, and the soil nutrient proportion is coordinated, therefore, the invention improves the utilization ratio of fertilizer by more than 3 percent on average, does not cause soil nutrient loss and unbalance, diffused pollution and soil acidification, improves the maize yield and is particularly suitable for the fertilization of a maize field.

The invention relates to a soil conditioner capable of being used for soil acidification conditioning and cadmium pollution repair. The soil conditioner comprises the following main components in percentage by mass: 40-60% of quicklime, 10-20% of a silicon calcium fertilizer, 10-30% of biological black carbon and 10-30% of a silicon mineral material and further comprises 1-3% of zinc sulfate and less than 10% of water, wherein the pH value is controlled at 10-12. The preparation method comprises the following steps: firstly, pre-mixing zinc sulfate with biological black carbon to obtain a premix; then, mixing quicklime, silicon calcium fertilizer, and silicon mineral material and activating the silicon mineral; and finally, mixing, granulating and drying the mixed material with activated silicon and the premixed together to obtain a finished product. The soil conditioner provided by the invention is low in cost and simple in formula, can be used for improving the pH value of soil and can be further used for soil acidification conditioning and cadmium pollution repair.

The invention discloses a method for radish soil testing and formulated fertilization. Currently, farmers mainly use fertilizer in farming and fertilization, however, soil is hardened, the yield and the quality of crops are reduced, and environment problems of lost and unbalanced soil nutrient, non-point source pollution and soil acidification are caused. A soil test and a fertilizer field test serve as a basis, and according to radish fertilizer requirement laws, nutrient preserving capability and fertilizer response, the application amount, the application period and the application method of fertilizer such as nitrogen, phosphorus, potassium, microelements and secondary elements are provided on the basis of reasonable organic fertilizer application. The scientific fertilizer application is applied in accordance with radish growth rules, the fertilizer utilization rate is improved, the soil fertility is improved, the soil pollution caused by improper fertilizer application is reduced, the biological environment is improved, and the radish yield and economic benefits are improved effectively.

The invention relates to a soil testing and fertilization method for peanuts. The method scientifically and reasonably adjusts the compounding ratio of nitrogen, phosphorus and potassium and coordinates the proportion of nitrogen, phosphorus and potassium in soil nutrient through soil nutrient test, fertilizer application rate calculation and fertilization steps. The method provided by the invention increases the average utilization rate of fertilizer by more than 3%, does not cause loss and imbalance of soil nutrients, non-point pollution and soil acidification and increases peanut yield, and is especially suitable for fertilization in the peanut field.

The invention relates to a soil-acidification-resistant organic fertilizer additive and a preparation method thereof. The additive is prepared through the steps of mainly using zeolite powder, low-grade calcium magnesium phosphate fertilizer, waste resource shells, calcium silicon powder and humic acid powder as raw materials, mixing, fermenting, curing, drying, crushing and scientifically combining and mixing with spray-dried embedded functional composite microbial agent microcapsules. After organic fertilizers added with the additive are applied into acid/acidified soil, the physical fertility, the biological fertility and the chemical fertility of the soil can be improved and the acid resistance of the soil is improved. The additive and the fertilizer with the additive are safe, effective and highly functional. The application of the additive removes the threat of acid/acidified soil to the agricultural production, the ecological environment and the human health from the angle of nutritionists of a food chain.

The invention relates to a method for remedying acidified arsenic contaminated soil by biochar-loaded nano-scale zero-valent iron cooperated with bacteria. The method includes selecting Pseudomonas putida strain MnB1 (ATCC23483); carrying out enrichment culture on the Pseudomonas putida strain in enrichment culture media; inoculating strains in culture media with divalent manganese and carrying out culture on the strains to obtain active metabolites; adding the active metabolites and the green synthetic biochar-loaded nano-scale zero-valent iron into the acidified arsenic contaminated soil anduniformly stirring the active metabolites, the biochar-loaded nano-scale zero-valent iron and the acidified arsenic contaminated soil; carrying out a series of physical-chemical reaction on active manganese oxide, zero-valent iron, biochar and trivalent arsenic or pentavalent arsenic in the soil; converting the arsenic in exchangeable forms into arsenic in residual forms. The method has the advantages that the arsenic in the soil can be effectively immobilized, the pH (potential of hydrogen) of the soil can be increased, and the double purposes of remedying soil acidification and arsenic contamination can be simultaneously achieved; the method is short in remediation time, high in efficiency, wide in treatment range and free of secondary pollution, and stable effects can be realized.

The invention relates to a tobacco plantation soil acidification improver and an application method thereof. The improver is prepared from the raw materials of: 20-30wt% of quick lime, 50-60wt% of dolomite powder, 5-10% of lime nitrogen, and 10-15wt% of peat. The application method comprises the steps that: (1) the soil is sampled, and pH value is measured; and (2) according to different pH values, the improver with different dose is applied. With the soil improvement structure, soil caking is prevented, soil organics are supplemented, and soil-borne diseases of tobaccos can be comprehensively controlled. The improver has the advantages of simple preparation method, easy-to-obtain raw materials, and low cost.

The invention relates to a biochar-based soil modifier, and aims at providing a Baijiang soil modifier which is low in cost, good in modification effect, economical and environment-friendly, has the functions of improving the water retention capability and the air permeability of soil, controlling slow release of fertilizers, relieving soil acidification and the like, and simultaneously, can be blended with organic and inorganic fertilizers. The soil modifier comprises biomass charcoal which is obtained by performing thermal cracking and charring on a biomass charcoal raw material under a limited-oxygen condition; and the biomass charcoal is applied through deep tillage to modify the quality of poor Baijiang soil.

The invention belongs to the field of soil conditioning methods, in particular to a prescription and preparation method of an acidified soil conditioner. The method comprises the following steps of: proportionally stirring and mixing vegetable oil waste, such as waste activated clay, soybean meal and the like, with a potassium hydroxide solution, and regulating the pH value of the materials to be 8-12; then, indirectly heating and stirring the obtained materials to obtain an organic and inorganic alkaline mixture; and finally, dewatering and drying the obtained mixture to obtain organic and inorganic mixed soil conditioner powder. By means of the acidified soil conditioner provided by the invention, the soil acidification problem and other types of acidification problems caused by using chemical fertilizers in old orchards and old vegetable gardens for years are effectively solved, and the situations of resource waste and environment pollution due to the landfill of the waste activated clay are avoided.

The invention discloses a composition for regulating soil acidity and application thereof and belongs to the technical field of soil improvement and regulation. The composition is prepared from straw biomass charcoal, alkali residues and an organic fertilizer, wherein the ratio of the straw biomass charcoal to the alkali residues to the organic fertilizer is (80-100) to (6-15) to 50. The three materials can remarkably improve the soil acidity and soil fertility and thus increase crop yield through matched application, meanwhile the soil acidification resisting capability is improved, the improvement effect time is prolonged, and the re-acidification process is retarded. A regulating method is a cheap and long-acting comprehensive soil acidity regulating method. A comprehensive red soil acidity regulating method mainly uses industrial and agricultural wastes as raw materials to prepare a regulating agent and opens a new way for resourceful waste utilization.

The invention discloses a special compound fertilizer for tobacco and an application method thereof. A granular compound fertilizer is prepared by mixing, stirring and crushing 2 to 10 mass percent of urea, 5 to 20 mass percent of ammonium phosphate fertilizer, 5 to 15 mass percent of potassium nitrate, 10 to 30 mass percent of potassium sulfide, 0 to 15 mass percent of lignosulfonate, 0 to 20 mass percent of coal, 5 to 20 mass percent of attapulgite and 0 to 2 mass percent of borax and performing granulation, drying, cooling and screening, and is doped and uniformly mixed with 0 to 5 mass percent of granular lime nitrogen to prepare a special compound fertilizer finished product for tobacco, and the compound fertilizer finished product is matched with other fertilizers for application 5 to 15 days before the transplantation of tobacco seedlings. The formula of the special compound fertilizer for tobacco has high practicability for southern tobacco areas, and the serious problems of soil acidification and the like caused by conventional fertilizer application formula can be solved; in addition, certain amounts of medium trace elements and synergist are added in the formula, so that requirements on mineral nutrition in a tobacco plant development process can be met, the utilization rate of nutrition is increased, the number of fertilizer application times is reduced, and the yield of tobacco plants and the quality of tobacco leaves are remarkably improved.

The invention discloses a process for producing a biological organic fertilizer by using garbage. The process comprises the following steps of: 1, separately collecting, decomposing and crushing dining table garbage, plant residue and animal excrement; 2, breeding composite biological colonies for deodorizing and decomposing phosphorus and potassium; 3, mixing the crushed dining table garbage, the crushed animal excrement and the composite biological colonies, and fermenting the mixture with standing to perform decomposition and deodorization; 4, adding the crushed plant residue into the dining table garbage and the animal excrement after the decomposition and the deodorization, fully blending the mixture, and then fermenting the mixture with standing; and 5, adding nitrogen, phosphorus, potassium and trace elements into the fermented mixture, and naturally airing, crushing and screening the mixture to obtain a finished product. The method effectively suppresses soil diseases and insect, reduces pesticide residue, prevents soil acidification and prepares the green garbage into the sterile deodorized green efficient biological environment-friendly organic fertilizer with high fertile alcohol by using the characteristics of quick temperature rise, good deodorizing effect and thorough decomposition of the composite biological colonies and performing innocent treatment such as quick temperature rise, deodorization, sterilization and decomposition on the green garbage.

The invention discloses a restoring method for acidified soil. 25 kg of soil acidification conditioning agents are applied to soil in per mu of a field; a mixture which is 30-100 cm high is stacked in a vacant field in site one week after the soil acidification conditioning agents are applied, the top of the stack is covered with a layer of straw for light shielding, and the mixture is stacked for 5-10 days, then turned over once and stacked for 15-25 days; 100 kg of an organic water-soluble fertilizer for acidified soil is applied to the soil in per mu of the field; earthworms are inoculated 30 days after the organic water-soluble fertilizer for the acidified soil is applied, the soil is watered regularly to keep wet, the humidity is maintained to range from 70% to 90%, and the temperature is controlled within 30 DEG C; the stacked product is turned and uniformly mixed, ditches are dug, the mixture is applied to the field as a fertilizer, and plowing is performed once; 50 kg of soil acidification improvers are applied to the soil in per mu of the field. The soil acidification conditioning agents, the organic water-soluble fertilizer for the acidified soil and the soil acidification improvers are applied, the earthworms are inoculated, accordingly, the soil acidification degree is remarkably reduced, and the soil fertility is improved.

The invention relates to a production method for ammoniated sulfur-based compound fertilizer by chemical synthesis, comprising the following steps: generating potassium bisulfate by the reaction of sulfuric acid and potassium chloride; mixing phosphoric acid and potassium bisulfate to generate a mixed acid; adding ammonia into the mixed acid to be pre-neutralized; neutralizing the pre-neutralizedslurry with the ammonia; atomizing to spray the slurry by heat released by neutralization; and spraying slurry, introducing in ammonia and pelleting by adding urea. According to the product produced by the technology, the nitrogen content of the compound fertilizer can be improved by above 4%, and the compound fertilizer has small possibility of blocking; in addition, the amount of potassium can be kept to be above 14.5%; the compound fertilizer which contains 48% total nutrition and over 14.5% of each single nutrition, can satisfy nitrogen16-phosphorus 16-potassium 16 marking requirements and conforms to the national standard is obtained; and in addition, the mixed acid is neutralized for several times, the soil is not acidized or hardened after the produced compound fertilizer is applied.

The invention discloses an arsenic-contaminated soil repairing and retaining agent based on microbe catalytic synthesis, and a preparation and application method thereof. Currently, lots of fixing agents for repairing arsenic-contaminated soil can cause soil acidification and seriously destroy the soil property. Aiming at the problems, the fixing agent for repairing arsenic-contaminated soil is prepared from ferrous sulfate serving as raw material by steps of catalytically oxidizing thiobacillus ferrooxidans, collecting a precipitated product and performing aging modification to the precipitated product. The synthesized product is uniformly mixed with soil according to a certain proportion, the water-soluble arsenic in the contaminated soil is reduced by 99.8 percent, the effective-state arsenic is reduced by 75.4 percent, and the pH value of repaired soil is about 7. The fixing agent is simple in preparation process and low in cost, can be used for effectively reducing the mobility of arsenic and bio-availability in the soil, and hardly affects the pH value of soil. The repaired soil is good for crop growth.

Belonging to the technical field of acidified soil treatment and remediation, the invention provides a nutritional type tobacco field soil acidification modifier formula and a use method thereof. The nutritional type tobacco field soil acidification modifier formula is formed by mixing of dolomite powder, quicklime, biological black charcoal and silicon-calcium powder in proportion. The use method consists of: firstly before ridging of tobacco field farmland, employing 5-point mixing sampling, then analyzing the acid-base property of soil, if the acidification degree is high and improvement is needed, spreading the nutritional type soil acidification modifier on the tobacco field surface before farming and ridging of the tobacco field, and then ploughing the mixture evenly, with the specific dosage and continuous usage time being determined by the soil acidification severity. According to the nutritional type tobacco field soil acidification modifier formula and the use method provided by the invention, the design and formula are reasonable, the use method is appropriate, the tobacco field soil acidification status can be improved significantly, and the tobacco development and disease resistance can be promoted, and the yield and quality of cured tobacco are improved. In addition, the formula and the method also have good effects in improving the stress resistance and yield of afterculture paddy rice.

The invention relates to a production method of a bioorganic fertilizer capable of improving the soil environment. According to the production method, an organic molecular material, a microbial inoculant, a soil loosening and water retaining agent, and a chelating agent are metered and delivered to a material chamber through a belt, the raw materials are extruded and granulated in the material chamber, and after the granulation, the products are screened so as to obtain the bioorganic fertilizer capable of improving the soil environment. By adding the organic molecular material, microbial inoculant, soil loosening and water retaining agent, and chelating agent, the soil colloidal environment is improved, the water, soil, and fertilizer are retained, the soil acidification and soil salinization are prevented, and the heavy metals are fixed.

The invention provides an electric promoting eluting and removing device and an electric promoting eluting and removing method for soil heavy metal based on an electric geotextile. An eluting agent is applied to heavy metal polluted soil and the eluting agent and soil are uniformly mixed through a plowing machine, so that the heavy metal in the soil is desorbed into a soil solution through eluting; EKG electrodes are buried into the soil at intervals in parallel and are used as anode and cathode materials of electrodynamics; an interval electrifying manner is adopted under the potential gradient of 0.2V/cm-4V/cm, so that the heavy metal with positive charges in the farmland soil is desorbed into the soil solution through eluting, and is enriched to a cathode under the action of an electric field; then the heavy metal is transferred out of the soil under the action of circulating washing of electrode liquid; and the washed electrode liquid is treated and then is circularly used for washing an electrode. By adopting the electric promoting eluting and removing device and method, the effect of chemical eluting can be improved and the discharging of an eluent is promoted; and meanwhile, the problem of soil acidification and alkalization in an electric remediation process is effectively avoided, and the electrode can be conveniently and rapidly mounted and used in field.

The invention belongs to the technical field of agricultural environmental conservation and restoration, and specifically discloses a farmland soil conditioner and a preparation method thereof. The farmland soil conditioner is prepared by uniformly mixing treated raw materials comprising quicklime, bentonite, zeolite and sepiolite in proportion. According to the invention, the preparation method is easy and simple to operate; the farmland soil conditioner is reasonable in formulation, has functions of restoring heavy metal pollution in soil, regulating soil acidity and alkalinity and the like, enables the contents of available cadmium and lead in polluted farmland to be decreased by 24.1%-35.1% and 28.7%-44.8% respectively, also enables the contents of available cadmium and lead in rice to be decreased by 34.9%-44.7% and 32.3%-46.1% respectively, improves the soil pH by 0.20-0.31, and is applicable to a variety of farmland soils with heavy metal pollution and serious soil acidification.