195 results about "Calcium cyanamide" patented technology

The invention provides a soil conditioner. The soil conditioner is prepared from the following raw materials in parts by weight: 0.15 part of water-soluble nano-silicon dioxide, 0.2 part of anionic polyacrylamide, 0.02 part of grondverbeteraar, 0.2 part of 50 percent calcium cyanamide, 0.05 part of abamectin, 0.05 part of 30 percent calcium chloride, 0.02 part of borax, 0.01 part of EDTA-Fe (ethylene diamine tetraacetic acid-Fe), 0.15 part of carboxymethyl cellulose, and 0.2 part of high-activity silicon-calcium-magnesium-potassium fertilizer. The soil conditioner has the function of improving soil and, and realizes improvement and fertilization of soil in one step by adding trace elements, bacteriostatic agent and the like.

The invention discloses a manufacturing method of mono-cyandiamide solution and di-cyandiamide and joint carbon and calcium carbonate, which comprises the following steps: adding limestone nitrogen into 3%-30% mono-cogeneration solution; stirring until reacting completely under 60 deg.c; separating insoluble matter to obtain carbon; making the effective nitrogen molar rate of mono-cogeneration and limestone nitrogen in the mono-cogeneration solution more than 1; aerating carbon dioxide into filtrate; evolving calcium carbonate with pH value below 10 under 60 deg.c; proceeding binary polymerization for mono-cogeneration to make di-cogeneration with high dissolving efficiency.

The invention discloses a method for efficiently reducing the continuous cropping obstacles of greenhouse soil, relating to the technical field of high-efficiency facility agricultural cultivation and meaning a technology of applying calcium cyanamide, organic materials, water and the like in soil before crop sowing or transplanting, and performing a soil reaction in a waiting period in an airtight condition to rapidly and efficiently kill pests in the soil, decrease acidification degree, relieve secondary salinization and increase the utilization rate of nitrogen fertilizer, thereby being capable of efficiently reducing the continuous cropping obstacles of the soil. The method for efficiently reducing the continuous cropping obstacles of greenhouse soil comprises the following steps that: 1) a proper treatment time, wherein soil treatment is performed in the seasons having a daily minimum temperature of not less than 5 DEG C; 2) determination for the dosage of calcium cyanamide, wherein the dosage of calcium cyanamide is usually 20-80 kg in per 667 m<2> of soil; and 3) field operation: (1) broadcasting for organic materials; (2) broadcasting for calcium cyanamide; (3) rotary tillage; (4) furrowing; (5) film coating, water irrigation and sealing; (6) soil reaction; and (7) film opening and airing: after the soil treatment is finished, the film is opened, ventilated or aired, and then crop sowing or transplanting can be performed.

The invention relates to an organic fertilizer, in particular to a chicken manure deodorizing and nitrogen preserving organic fertilizer and a preparation method thereof. Calcium cyanamide, natural zeolite, organic materials are taken as additive materials added to fresh chicken manure for stacking and fermentation treatment so as to prepare the organic fertilizer. The preparation method is characterized by simple process and low cost, and solves the problems of loss of nitrogen nutrients in wastes and environmental pollution in raising chicken. The components of the organic fertilizer based on weight ratio are 10-20% of the organic materials, 2-3% of the calcium cyanamide, 3-5% of the natural zeolite, and 73-84% of the chicken manure on dry basis. The preparation method is as follows: the organic materials, the chicken manure, the calcium cyanamide and the natural zeolite are stacked in layers according to a certain proportion; the outer layer is sprinkled with the organic materials, after 7-10 days of fermentation sealed by plastic cloth, turnover is done mechanically or artificially, then the sealed fermentation is carried out for another 7-10 days by the plastic cloth, and the organic fertilizer is obtained after being dried in the sun. The organic fertilizer has the advantages of reasonable formula, good nitrogen preserving and deodorizing effects, and easy application, thus being suitable for being used as a fertilizer for producing pollution-free agricultural products.

The invention discloses a smelting method of non-quenched and tempered steel. The smelting method comprises the working procedures of converter smelting, LF refining, VD vacuum treatment and continuous casting, and comprises the specific technological steps that (1) nitrogen is blown at the bottom in the whole converter smelting process, and converter high-carbon drawing and tapping is carried out; (2) diffusion deoxidation is carried out in the LF refining process, good deoxidation and desulfurization effects are guaranteed, and the N content of molten steel after LF finishing is 75-90ppm; (3) VD vacuum treatment is carried out, wherein the content of N in the molten steel after hollow breaking is 50-60 ppm, after hollow breaking, soft blowing time is larger than or equal to 30 min, and argon flow is smaller than or equal to 25 L/min; and (4) continuous casting adopts crystallizer stirring and tail-end stirring, medium-high carbon tundish covering agent and medium-carbon crystallizercovering slag are used, and continuous casting billets are cooled slowly in an off-line mode. According to the smelting method of the non-quenched and tempered steel, the nitrogen content yield is stable, the performance of the non-quenched and tempered steel is good, calcium cyanamide (CaCN2) is not adopted, environmental pollution is small, the feeding amount of the manganese nitride wire is small, and the production cost is low.

The invention relates to a fertilizer, in particular to a granular calcium cyanamide compound fertilizer and a technique for processing the same. The granular calcium cyanamide compound fertilizer comprises the following components according to the total weight: 10 to 80 percent of calcium cyanamide, 10 to 80 percent of adding components, and 5 to 30 percent of caking agent, wherein the adding components comprise one or more than one of animal wastes, plant straws, decomposed coal, humic acid and humic acid magnesium; and the caking agent is one or more than one of urea, ammonium nitrate and calcium nitrate. The processing technique comprises the steps of crushing, stirring and granulating. The processing technique uses the characteristics of easy decomposition of the adding components in water and difficult decomposition of the caking agent in air, solves the problems that the prior calcium cyanamide is easy to decompose in the air and is not easy to dissolve in the water, effectively exerts the properties of long lasting manurial effect of the calcium cyanamide in soil and slow absorption by crops, has the characteristics of certain weeding and sterilizing effects, and can prevent causing harm to health of human body during use at the same time after the fertilizer is manufactured into granules.

The invention relates to a soil disinfector, in particular to a facility vegetable field eelworm killing agent and an application method thereof to solve the problem of preventing and controlling the root knot nematode. The eelworm killing agent comprises the components in weight percentage: 10 to 20 percent of calcium cyanamide and 80 to 90 percent of organic material. The calcium cyanamide and the organic material are mixed and stirred evenly and mechanically to prepare the eelworm killing agent. The organic material is nutshell powder, sawdust or crop straw. The application method comprises the following steps: the vegetable field is cleaned in summer with high temperature and good sunlight, the eelworm killing agent is broadcasted, the subsoiling and the ridge forming processes are performed, a film is covered, and the irrigation is performed; and after the vegetable field is sealed for 14 to 21 days, the film is disclosed, the soil is plowed, and the vegetable field is air-cured for 5 to 7 days. The facility vegetable field eelworm killing agent and the application method thereof can be applied to prevent and control vegetable root knot nematode for more than 30 vegetable crops such as facility vegetable field cucumber, tomato, kidney bean, melon and celery, have simple technique, sufficient raw materials and low price, and prevent and control the vegetable root knot nematode by more than 70 percent.

The invention discloses a calcium cyanamide oil suspension, the formula of which comprises the following substances by mass percent: 5-30% of calcium cyanamide, 1-5% of wetting dispersant, 1-2.5% of structure regulator, 0.5-2% of stabilizer and the balance of vegetable oil or mineral oil. The calcium cyanamide oil suspension can greatly improve the wetting and spreading performance on fruit branches and permeating performance on branches of calcium cyanamide, improves rainfall erosion resistance, overcomes the shortcomings of fertilizer damage caused by nonuniform coating, low use work efficiency and the like of the original method, prolongs the retention time of the effective ingredients on the branches, reduces the consumption of calcium cyanamide, reduces dust pollution, greatly improves use effect of calcium cyanamide and is convenient for transportation and application. The calcium cyanamide oil suspension can be applied to a dormancy breaking agent of grape, apple, pear, peach cherry and other fruit trees.

The invention relates to a method for preparing a chemical product, in particular to a method for preparing aminoguanidine bicarbonate. Under the double action of decalcification and pH value adjustment of a dilute sulphuric acid, hydrazine hydrate and calcium cyanamide are added with a cyanamide stabilizer for one-step hydrazinolysis reaction to obtain aminoguanidine water solution, and then ammonium hydrogen carbonate is added into the aminoguanidine water solution to precipitate to produce the aminoguanidine bicarbonate. The method has the advantages of simple process, easy control, steady quality, and high yield.

The invention relates to a reactive type sustained-release fertilizer compounded by nitrification inhibitor/urea formaldehyde and a preparation method thereof. The reactive type sustained-release fertilizer mainly comprises the following main raw materials of: the nitrification inhibitor, urea and formaldehyde, wherein the nitrification inhibitor is dicyandiamide or calcium cyanamide. The preparation method comprises the following steps of: according to a raw material proportion, adding the formaldehyde into urea melt or urea solution in proportion to obtain a mixture; simultaneously adding the nitrification inhibitor and a catalyst into the mixture and fully mixing the mixture to prepare slurry which contains sustained-release nitrogen; and then mixing the prepared slurry and components which contain phosphate fertilizer, potassic fertilizer, returned materials and the like to prepare the sustained-release compound fertilizer.

The invention discloses a compound preparation for killing nematodes. The compound preparation comprises effective components and an additive, wherein the effective components comprise iprodione and an active component, the active component is avermectin B2, carbosulfan, calcium cyanamide, fluopyram, amino-oligosaccharin, chlorpyrifos, imidacloprid, emamectin benzoate, phoxim, lentinan, an oligosaccharide, bacillus cereus, verticillium chlamydosporium or paecilomyces lilacinus, and the effective components account for 1-90% of the total mass of the compound preparation. The active component with good activity and matching rate is selected by carefully and repeatedly selecting and comparing various active components, and the compound preparation containing the carefully selected active component has significant nematode killing and synergistic effects. The nematodes which can be resistant to the single iprodione can not become resistant to the compound preparation.

The invention relates to a soil conditioner containing calcium cyanamide and a preparation method thereof. The soil conditioner comprises, by weight percentage, 20-60% of carbonaceous organic material, 30-80% of calcium cyanamide, and 5-15% of grease. The preparation method includes: drying the carbonaceous organic material, crushing, well mixing the carbonaceous organic material, the calcium cyanamide and the grease according to the weight percentage, and extruding and granulating. By the preparation method, the problems that the calcium cyanamide particles is easy to resolve in water to generate cyanide ammonia gas causing effective components loss of the calcium cyanamide, and harm to human bodies can be caused by the cyanide ammonia gas can be well solved. When the soil conditioner containing calcium cyanamide is used in soil fumigation, the calcium cyanamide can be reacted with water to generate the cyanide ammonia gas which has evident killing effect to various soil-borne diseases. In the meantime, heat and ammonia generated during fermentation and decomposition process of the carbonaceous organic material can enhance the killing effect of the calcium cyanamide.

The invention discloses a pseudo-ginseng continuous cropping soil comprehensive treatment method which comprises the following steps of 1, performing soil fumigation; 2, applying base fertilizer; 3, disinfecting secondarily; 4, top dressing biocontrol bacterium and humate fertilizer. The pseudo-ginseng continuous cropping soil comprehensive treatment method has the beneficial effects that nitrochloroform is utilized as a pseudo-ginseng continuous cropping soil fumigation agent to effectively kill creatures such as fungi, bacteria and insects; calcium cyanamide can slowly release nitrogen fertilizer, reduce soil-borne disease, reduce soil insects, supplement calcium and improve soil; the nitrochloroform and the calcium cyanamide both can be resolved in soil and are free of residue; the biocontrol microorganism can be colonized in the soil and at the roots of the pseudo-ginseng, and root rot pathogenic bacteria of the pseudo-ginseng are prevented from invading by occupying effective ecological niches, generating antibacterial substances and the like; humic acid water-soluble fertilizer can achieve fertilizer synergia, improve the soil and stimulate crop growth. The pseudo-ginseng continuous cropping comprehensive treatment method can enable the emergence rate of pseudo-ginseng seed branches in continuous cropping soil to be 95% or more, and the seedling survival rate to be 80% or more.

The invention relates to a multifunctional soil improved sustained-release environment-friendly fertilizer and a preparation method thereof. The sustained-release environment-friendly fertilizer is prepared from the following raw materials in part by weight through adopting the dry extruding and pelleting technology: 16 to 25 parts of urea, 17 to 19 parts of monoammonium phosphate, 25 to 35 parts of potassium sulfate or potassium chloride, 8 to 12 parts of calcium cyanamide and 18 to 30 parts of filler. According to crop production in China and the current situation of soil, scientific proportion is realized, adaptability of the raw materials is high, the adding amount of urea is less than 20 percent, and drying and cooling procedures are not required during preparation. The multifunctional soil improved sustained-release environment-friendly fertilizer has a stable effect and high utilization ratio of nutrients, and can improve soil, promote growth of crops and improve yield and quality of the crops.

The invention discloses a soil repair agent and a preparation method thereof. The soil repair agent comprises the following components in parts by weight: 10-80 parts of calcium cyanamide, 10-70 parts of a medium trace element fertilizer and 1-20 parts of beneficial bacteria, wherein the beneficial bacteria are sealed into capsules; corresponding parts of components are evenly mixed to obtain the soil repair agent. By adopting the soil repair agent disclosed by the invention, the soil pH value is adjusted, malignant bacteria and nematodes in the soil are killed, the soil-borne disease is reduced, the soil environment is repaired, the functions of the soil environment are restored, and especially, a series of vicious circles caused by soil environment degradation can be effectively contained. The soil repair agent is convenient to use, all components can be received by the soil, the soil repair agent is an ideal multifunctional soil environment repair agent with the functions of fertilization and fertility increase, slow release and nitrogen fixation, soil and water conservation, acid-base adjustment, bacterial inhibition and disease control and low price. The soil repair agent is less in equipment investment, simple in preparation process and low in manufacturing cost.

The invention discloses a preparation method for organic fertilizer for preventing and treating secondary salinization of a solar greenhouse vegetable field. The preparation method comprises the following steps: (1), mixing cow dung or a mixture of the cow dung with one or more of goat manure, chicken manure, pig manure, straws and waste tobacco shreds according to the volume ratio of 1:1 and fermenting, thereby obtaining a material A; (2), preparing earthworm cast after cow dung is fermented; (3), crushing crop straws, adding the crushed straws to chicken manure or pig manure, and enzyme microorganism, mixing uniformly, building stacks and fermenting, thereby obtaining a material D; (4), mixing the materials A, C and D to obtain a material E; (5), mixing the material E, calcium cyanamide, diammonium phosphate, zinc sulfate and sodium borate, thereby obtaining finished products organic fertilizer. According to the preparation method for the organic fertilizer for preventing and treating the secondary salinization of the solar greenhouse vegetable field, wastes of agriculture and animal husbandry industries are utilized as main materials and match natural antibacterial materials, such as lime nitrogen, in accompany with secondary and trace elements, such as calcium, boron and zinc, so as to solve problems of vegetable wilting and soil harmful bacteria caused by the salinization of the solar greenhouse vegetable field. Compared with application of common fertilizer, application of the prepared organic fertilizer has the advantages that the fertilization costs are reduced and the yield and quality of vegetables are improved.

The invention relates to a production method and device of calcium cyanamide. The method comprises the steps that smashed calcium carbide, catalysts and melted calcium cyanamide are added into corresponding feed bins; the smashed calcium carbide and catalysts are ball-milled to be with required granularity according to the weight proportion and sent into the calcium carbide bin; after the melted calcium cyanamide is ball-milled to be with the granularity ranging from 0.01 mm to 30 mm, the calcium cyanamide is sent to the melted calcium cyanamide bin; the materials in the calcium carbide bin and melted calcium cyanamide bin are sent to a rotary nitriding furnace according to proportions. The device comprises the rotary nitriding furnace, a feeding device installed on the furnace end, a nitrogen input device of a furnace body reaction zone and a cooling device of a furnace body cooling zone, a feed screw conveyor is installed on the furnace end, a heating device is installed on the nitrogen input device of the furnace body reaction zone, and a cooling device is arranged on the furnace body cooling zone. The production method and device of the calcium cyanamide have the advantages that the reaction temperature in the furnace can be adjusted in time, the temperature in the furnace is small in fluctuation, and the discharging and cooling effects are good.

The invention discloses a yield-increasing water retention fertilizer special for hickory nuts. The fertilizer is prepared from, by weight, 50-150 parts of organic fertilizer, 5-15 parts of steel slag, 5-15 parts of urea, 15-25 parts of diammonium phosphate, 5-10 parts of ammonium bicarbonate, 3-15 parts of potassium sulfate, 2-10 parts of magnesium sulfate, 10-20 parts of calcium cyanamide, 3-10 parts of calcium sulfate, 1-10 parts of calcium oxide, 4-8 parts of microelements, 0.1-1 part of gamma-polyglutamic acid, 0.3-1.5 parts of vermiculite powder, 0.5-1.5 parts of bentonite, 5-15 parts of ardealite, 0.05-0.3 part of malic acid, 0.1-0.5 part of phosphate solubilizing bacteria, 0.5-3 parts of glucose, 2-5 parts of sodium potassium tartrate tetrahydrate, 2-5 parts of rare-earth salt and 1-5 parts of water-retaining agent. The yield-increasing water retention fertilizer special for the hickory nuts is reasonable in formula, comprehensive and balanced in nutrition, high in water retaining ability and capable of increasing the yield of the hickory nuts, improving quality and improving physical and chemical properties of soil.

The invention relates to a soil fertilizer synergist, in particular to a nitrogen synergist applied to protected horticultural vegetable fields and a preparation method thereof. The components by weight percentage are 10-30% of calcium cyanamide, 30-50% of zeolite powder and 30-50% of lignite. The preparation method comprises the following steps: the 10-30% of calcium cyanamide and the 30-50% of zeolite powder are mechanically and evenly mixed to obtain a mixture, and then the mixture is added with the 30-50% of lignite and mechanically mixed evenly, thus obtaining the nitrogen synergist. The preparation method is simple and pollution-free, and the nitrogen synergist is an organic and inorganic combined nitrogen synergist which has the effects of combining the slow release and quick release of nutrients, slowly releasing fertilizer nutrients, improving the utilization rate of the fertilizer, reducing the amount of chemical fertilizers used, improving the physical and chemical properties of soil and improving the productivity of the soil.

The present invention relates to a pesticide for controlling mustard disease. Said pesticide composition includes (by wt%) 15-70% of calcium cyanamide and 10-75% of calcium oxide, and the rest is impurity. Said invention also provides its application method and concrete steps.

The present invention relates to a pesticide, in particular, it relates to a pesticide for killing injurious germ and pest in soil, its preparation process and application method. Said pesticide contains (by wt%) 15-70% of calcium cyanamide, 10-75% of calcium oxide and the rest is impurity. Its preparation method includes the following steps: placing calcium carbide, calcium cyanamide and additive into a reaction furnace, introducing nitrogen gas at 1000-1100 deg.C to make azotizing reaction for 18-24 hr so as to obtain the invented finished product. Said pesticide can be used as fungicide, insecticide, weedicide, nematocide and plant growth regulator, etc.

The invention provides a preservation solution for a fresh amnion. The preservation solution per 1,000ml is prepared from the following ingredients: 30g to 50g of DMEM culture medium, 20g to 30g of chondroitin sulfate, 10g to 20g of low molecular dextran, 5ml to 10ml of sodium pyruvate, 10ml to 20ml of non-essential amino acids, 5ml to 10ml of gibberellin, 10ml to 20ml of HEPES, 10g to 20g of pentaerythritol, 2g to 3g of ammonium chloride, 3ml to 5ml of DMPU, 15g to 20g of nano-silica, 8ml to 10ml of carotene, 12ml to 15ml of indoleacetic acid, 5g to 6g of calcium cyanamide, 3g to 5g of hydrocortisone and the balance of water for injection. By using the preservation solution provided by the invention, the fresh amnion can be preserved for 1 to 2 weeks at normal temperature and can be preserved for 1 year or more at the temperature of 4 DEG C, and the use is convenient; the form of the amnion is not changed, and the survival rate of cell active factors contained in the amnion is relatively high.

Disclosed is a nitrogenous fertilizer inhibiting agent and the use, which comprises 1-50wt% of dicyandiamide and 50-99wt% of calcium cyanamide, the inhibiting agent can be bonded with N-containing inorganic fertilizer such as ammonium phosphate, ammonium nitrate, ammonia sulfate, urea, liquid ammonia for synergic effect to increase nitrogen utilization coefficient.