35results about How to "Increased available nitrogen content" patented technology

The invention discloses a method for preparing sludge carbon by virtue of microwave-assisted hydrothermal carbonization. The sludge carbon obtained by using the method is stable in quality and high in content of effective phosphorus and effective nitrogen, has a good soil fertilizing effect, and also can be used for effectively reducing or fixing the content of heavy metals in sludge. The method disclosed by the invention is wide in raw material source, low in production cost and simple and feasible in process step, is environment-friendly, and is easy in popularization and application.

The invention discloses a multifunctional sustained or controlled release fertilizer additive and belongs to the technical field of fertilizer additives. The multifunctional sustained or controlled release fertilizer additive is prepared by, by weight, 10-20% of lignin, 10-20% of ammoxidized lignin , 10-14% of humic acid, 10-14% of dicyandiamide, 4-8% of modified high-surface-activity mineral powder, 10-20% of compound micro-fertilizer, 10-16% of traditional Chinese medicine formula, 4-8% of potassium monopersulfate, 2-5% of starch and the rest water. Lignin and ammoxidized lignin are added, so that fertilizer effect can be released slowly, and the multifunctional sustained or controlled release fertilizer additive can serve as a synergist of nitrogen fertilizer; agricultural waste can be utilized, so that agricultural recycling is realized, and agricultural cost is reduced; the traditional Chinese medicine formula and potassium monopersulfate are added, so that the additive has insecticidal and bacterial effect, and crop pest and bacterial disease can be prevented without causing drug residue and secondary environment pollution.

The invention provides a high-efficiency saline alkali soil modifier and a preparation method thereof. The modifier comprises chitosan, sodium carbonate, rice bran hemicellulose, bronyl acetate, ammonium citrate, asiaticoside, polyacrylamide, sodium benzoate, sodium succinate, quick lime, manganese dioxide, kieselguhr, opal, potassium humate, nanometer aluminum oxide, lysine and sodium lignin sulfonate. The prepared soil modifier has a comprehensive modification effect on saline alkali soil, the saline content of the surface layer of the soil is remarkably reduced, the contents of organic matter and available nitrogen in the soil are remarkably improved, the texture and structure of the saline alkali soil are improved, the fertility of the soil is improved, the soil is better suitable for agricultural plantation, no secondary pollution can be generated in the modifying process, and application prospects are good.

The invention provides a microbial organic fertilizer for improving saline-alkali soil. The fertilizer comprises the following raw materials: fulvic acid, peat, salicylic acid, municipal sludge, sesame paste, mannitol, sulfated polysaccharide, cymene, rare earth isoprene rubber powder, alfalfa plant, pumice, psyllium husk powder, salt tolerant Rhodopseudomonas capsulata, and Halomonas halophiles. The invention also provides a preparation method of the fertilizer. The fertilizer prepared by the method provided by the invention has an effective living bacteria number of 0.74-0.77 billion cfu/g, a total nitrogen content of 3.8-4.1wt%, a total phosphorus content of 2.9-3.2wt%, a total potassium content of 3.2-3.6wt%, an organic matter content (on a dry basis) of 43.3-44.7wt%, a water content of 22.1-22.6wt%, and a pH of 5.52-5.58. The fertilizer provided by the invention has a saline-alkali soil improving effect, and can reduce the pH value of soil, the soil alkalization degree and soil salinity.

The invention discloses a conditioner for repairing heavy metal contaminated soil and a preparing method for the conditioner. The conditioner comprises, by weight part, 18-33 parts of oyster powder, 11-17 parts of biogas residue, 4-10 parts of cow dung, 3-11 parts of selenium nitrate, 4-9 parts of calcium molybdate, 2-8 parts of barium phosphonate, 5-11 parts of superphosphate, 50-85 parts of calcareous soil, 6-10 parts of calcium oxalate, 7-12 parts of sugarcane ash, 3-10 parts of palygorskite, 2-8 parts of bamboo powder, 1-3 parts of yeast powder and 4-8 parts of poly dimethyl diallyl ammonium chloride and further comprises 0.1-1.5 parts of cellulose decomposition bacterium agent and 0.3-1.8 parts of silicate bacterium. By means of the prepared conditioner, the content of organic matter in the soil, the content of salt in the soil and the content of available nitrogen in the soil are obviously increased, the texture and the structure of the soil are improved, and the conditioner is suitable for agricultural planting.

The invention relates to a dicyandiamide production method, which comprises the process steps of pulverization, mixing, calcining, hydrolysis, polymerization and dicyandiamide obtaining. The dicyandiamide production method has the following characteristics that: because the urea used as chemical fertilizers in the prior art and lime with wide sources are used as raw materials, on one hand, the production cost is reduced, on the other hand, the safety in the production process is improved, the process condition in the whole production process is simple, very good use prospects are realized, the tail gas is recovered in the calcining process, the cyclic utilization is realized, the environment protection pressure is reduced, and economic benefits are improved. In the calcining process, the tail gas sequentially passes through an ammonia absorbing tower and a calcium cyanamide hydrolysis pool, and calcium carbonate can be produced. The rest nitrogen gas can be directly returned to a calcining furnace for being reused after the drying treatment, and the efficient nitrogen content of the calcium cyanamide produced by the process can reach 23 percent to 25 percent and is higher than the efficient nitrogen content of the calcium cyanamide produced by a calcium carbide process.

The present invention provides a planting method for interplanting young eucalyptuses and peanuts. The planting method comprises the steps of: selecting interplanting parcels; selecting eucalyptus and peanut varieties suitable for interplanting; when relative soil moisture content reaches over 70% and an average temperature is stabilized at 12 DEG C-18 DEG C, interplanting the eucalyptuses and peanuts, and interplanting the eucalyptuses and peanuts with a line space ratio of 1:(4-6), wherein the distance between the eucalyptus and peanut is at least 40 cm; carrying out fertilizing management; and carrying out field management and tending. By adopting the technical scheme of the invention, the nutrients of soil can be effectively increased, the soil fertility can be improved and the growth of eucalyptus seedlings can be accelerated; the major pest and disease harm indexes of peanuts are reduced, the occurrence of peanut pests and diseases and increases is reduced, and the peanut yield and interplanting income are increased; and the micro-ecological environment of the soil is improved, the application amount of pesticides and fertilizers is reduced and sustainable development of interplanting eucalyptuses and peanuts is accelerated.

The invention relates to a soybean-field acidic soil conditioner and a preparation method thereof, and the method comprises preparing a phosphate-containing solid from a glyphosate waste liquid, preparing the soil conditioner, granulating, drying and the like. Compared with CK (contrast check), the acidic soil conditioner helps to improve soil pH of soybean filed by 0.51 unit, also, improve the soil available nitrogen content by 31.60%, and improve the soybean mu output by 8.02% compared with a contrast group, and is substantial in yield increasing effect. Resourceful sustainable utilization of glyphosate production production wastewater is realized, valuable phosphate rock resource is saved, also acidic soil pH is raised, soybean rhizosphere rhizobium quantity is recovered, and soil fertility is raised.

The invention belongs to the technical field of agricultural intensive production and particularly relates to a microbial immobilization agent capable of improving available nitrogen of tea garden soil and a preparation method thereof. The microbial immobilization agent comprises nitrogen transformation bacteria, an adsorption material and an embedding agent, wherein the mass ratio of the nitrogentransformation bacteria to the adsorption material to the embedding agent is 8: 1: 400 in sequence, and the microbial immobilization agent contains 1.0*107-1.0*108 cfu/g of viable bacteria. The microbial immobilization agent can effectively convert nitrogen in soil and even air into effective nitrogen which can be absorbed by tea trees, so that the application amount of chemical fertilizers in tea gardens can be effectively reduced, and the quality of tea leaves can be ensured. The invention further aims to provide a preparation method of the microbial immobilization agent so as to conveniently and efficiently realize accurate preparation of the microbial immobilization agent. The preparation method comprises the steps of obtaining nitrogen transformation bacteria, culturing the nitrogentransformation bacteria, preparing an embedding agent and preparing a microbial immobilization agent.

The invention discloses a nitrogen element synergistic agent in straw-application soil and a preparation method thereof. The synergistic agent consists of the following raw materials in certain mixture ratio: cycloheximide or natamycin, tetracycline or oxytetracycline, streptomycin, silica, a wetting agent NNO and nekal BX. The preparation method comprises the following steps: A.. the cycloheximide or the natamycin, the tetracycline or the oxytetracycline, the streptomycin and the silica are premixed according to the proportion; B. the wetting agent NNO and the nekal BX is added to the obtained mixture, are subjected to secondary mixing; and C. the obtained mixture is dried, crushed, sifted and packaged under certain condition. The synergistic agent has the advantages of simple method, small energy consumption, no pollution to environment, long quality guarantee period, convenient use, safe operation, low cost, no toxicity and no side effect on human, animal and plant and safety to biological environment; and the effective nitrogen content of the straw-application soil is increased by 50 to 120 percent, thereby alleviating crop pest in straw application. The method is suitable for application to improve effective nitrogen in soils with difficult types when various crop straws are returned to the field or the soil.

The invention provides a dibble-seeding planting method for bocconia cordata. The method comprises the steps: (1) seed dressing treatment: preparing 25kg-50kg of fire clay ash and 10kg-25kg of calcium-magnesium phosphate for 300g-500g of seeds per mu, and carrying out dressing in five times, so as to obtain a mixture of the seeds and dressing materials; (2) ridging and pitting: selecting loose fertile well-drained sandy soil, carrying out soil preparation prior to ridging, and then, carrying out pitting on flat ridge faces while controlling the rate of 800 to 1,000 pits per mu; and (3) dibbleseeding: in the middle and last 10 days of February to the first ten days of March every year, subjecting the mixture of the seeds and the dressing materials, uniformly mixed in the step (1), to uniform dibble seeding in the pits obtained in the step (2) without soil covering. According to the dibble-seeding planting method for the bocconia cordata, provided by the invention, the germination rateof the bocconia cordata seeds can be increased, and the time interval of germination among the seeds can be shortened, so that the growth vigor of the bocconia cordata can be kept basically consistent, the workload of planting is alleviated, and the yield can be stabilized.

The invention provides a saline-alkali-resisting composition containing oldenlandia diffusa. The saline-alkali-resisting composition is characterized by comprising the oldenlandia diffusa. A preparation method of the saline-alkali-resisting composition is characterized by including preparing spraying slurry, to be more specific, mixing Sarcodia montagneana powder, highland barley flour, decocted sticky rice and glucose liquid according to the proportion, decocting with small fire for 60-66 minutes after boiling, storing the mixed liquid at 30-32 DEG C for 20-25 days in a sealed manner after cooling, ventilating, adding fruit peel during the ventilation, and preserving the temperature of 30-32 DEG C for 6-7 days to obtain the spraying slurry. The cation exchange capacity/water-soluble organic carbon ratio of the prepared saline-alkali-resisting composition is 1.9-2.5, the C/N ratio of the saline-alkali-resisting composition is 0.26-0.44, and the salmonella content of the saline-alkali-resisting composition is 0.2-0.5/g.

The invention discloses a culture medium special for Fritillaria thunbergii and a preparation process and system of the culture medium. The culture medium and the preparation process and system have the advantages that bamboo carbon and refined bamboo vinegar serving as the main raw materials are compounded to obtain the culture medium special for the Fritillaria thunbergii, and the culture mediumcan be directly applied to the seedling culture of the Fritillaria thunbergii and can also be directly applied in the field to serve as the medium accompanying fertilizer; by the culture medium, maximized compounding of nutrition needed by the propagation of Fritillaria thunbergii bulbs is achieved, maximized utilization of key nutrition is guaranteed, and Fritillaria thunbergii vegetative propagation emergence rate can be increased.

The invention discloses the technical field of saline-alkali soil improvement, and particularly discloses the field of a saline-alkali soil chicken manure fermented fertilizer. The saline-alkali soilchicken manure fermented fertilizer comprises the raw materials with corresponding weight parts: 42-55 parts of fresh chicken manure, 15-18 parts of rice straw, 10-16 parts of sulfur, 6-10 parts of peanut shells, 3-6 parts of kaoline, and 0.021-0.028 part of a microbial agent. Sulfur after heating can be combined with oxygen to generate sulfur dioxide; the sulfur dioxide is dissolved in water to generate sulfurous acid or is oxidized to generate sulfuric acid under the action of bacteria; sulfurous acid or sulfuric acid can react with ammonia in a mixed fermentation substance to generate ammonium sulfate, so the content of effective nitrogen in the chicken manure fermented fertilizer is increased, and at the same time, the emission of ammonia gas is reduced; the kaoline has a dispersing effect, the content of colloids in chicken manure is high, the kaoline can improve the dispersion uniformity of the chicken manure fermented fertilizer, and the occurrence of partial condensation or caking phenomenon of the chicken manure fermented fertilizer is prevented.

The invention relates to a mixed amine extraction agent for separation of molybdenum and vanadium and a method for separating and recovering the molybdenum and the vanadium from a waste catalyst. Themixed amine extraction agent comprises imidazole compounds and quaternary ammonium compounds. The method for separating and recovering the molybdenum and the vanadium from the waste catalyst includesthe steps that the waste catalyst containing the molybdenum and the vanadium is subjected to alkaline leaching to obtain extraction liquid containing the molybdenum and the vanadium, the extraction liquid containing the molybdenum and the vanadium is extracted and separated by using an organic phase containing the mixed amine extraction agent, raffinate is a solution containing the molybdenum, anda solution containing the vanadium is obtained by washing and stripping a loaded organic phase. The mixed amine extraction agent has the characteristics of high saturation capacity, short phase separation time, excellent extraction and reverse extraction performances, high molybdenum-vanadium separation coefficient and the like, can achieve high efficiency separation of the vanadium and the molybdenum in an alkaline solution system, and has a good industrial application prospect.