10 results about "Potassium phosphite" patented technology

The invention discloses a microbial composition for preventing and treating vomitoxin as well as a preparation method and application of the microbial composition. The microbial composition for preventing and treating vomitoxin is mainly prepared by mixing a component I and a component II according to a mass ratio of (50.0-0.1): (50.0-99.9), the component I comprises trichoderma harzianum powder, trichoderma asperellum powder and penicillium bayi powder; and the component II comprises potassium phosphite, alkene potassium phosphate and potassium tripolyphosphate. The preparation method comprises the following steps: adding the component I and the component II into a stirrer, and stirring and mixing to obtain the coating. The invention also discloses an application of the microbial composition for preventing and treating vomitoxin. The microbial composition disclosed by the invention can generate metabolites with a biocontrol effect, has efficient inhibitory activity on fusarium, can reduce generation of vomitoxin, can effectively regulate diversity of soil microorganisms, realizes crop yield increase and soil improvement, and is green and environment-friendly. The method and application are simple, the cost is low, and the method is suitable for agricultural application.

The present application relates to the field of potassium hypophosphite production, and particularly relates to a method and system for co-producing potassium hypophosphite and potassium phosphite, which comprises: replacing all the reaction kettles and pipelines with nitrogen to maintain a slight positive pressure in the system; continuously feeding potassium hydroxide aqueous solution and molten yellow phosphorus into the first-stage reaction kettle to generate potassium hypophosphite and phosphine through disproportionation reaction; feeding the reaction liquid into the second-stage reaction kettle to gradually increase the alkali concentration, and convert part of the potassium hypophosphite into potassium phosphite; feeding the reaction liquid into the third-stage reaction kettle to maintain the alkali concentration at a certain level, and convert part of the potassium hypophosphite into potassium phosphite and release hydrogen; feeding the reaction liquid into the fourth-stage reaction kettle to maintain the alkali concentration at a certain level, and continuously discharge the product containing the mixture of potassium phosphite and potassium hypophosphite from the fourth-stage reaction kettle after the reaction approaches equilibrium, thereby improving the production efficiency, reducing the raw material cost, improving the process safety, thermal energy utilization efficiency and product quality, and realizing the comprehensive utilization of the gas byproducts.

The invention belongs to the field of durian cultivation, and particularly relates to a durian flower forcing agent, a preparation method and application. According to the durian flower forcing agent, prohexadione calcium, potassium phosphite, benzyl benzyl aminopurine, thidiazuron and ethephon are reasonably combined, durian can be promoted to bloom in advance, the durian flower forcing agent is diluted and then sprayed to durian trees, budding of the durian trees can be achieved 9 days after spraying, and the budding time and the blooming time are shortened; meanwhile, the cluster number of durian flower buds can be remarkably increased, important guarantee is provided for increasing the yield of durian, and economic benefits of durian cultivation can be greatly increased.

The invention provides a kasugamycin solution, and a preparation method and application thereof, and the solution is mainly prepared from the following raw materials by mass: 2-10% of kasugamycin; 0.01% to 0.05% of chitosan oligosaccharide; 0.05% to 0.3% of glucan; 0.05% to 0.2% of a bacillus licheniformis metabolite; 0.1%-0.3% of potassium phosphite; 0.05%-0.15% of polyglutamic acid; the total percentage is 100%. According to the kasugamycin solution, through a multi-channel synergistic effect, effective components are efficiently utilized, the lasting period can be remarkably prolonged, and the kasugamycin solution has urgent and important significance in promoting development of an agricultural green prevention and control technology.

The present application relates to the technical field of traditional Chinese medicine cultivation, and discloses a salvia miltiorrhiza ecological cultivation method with high water and fertilizer utilization rate, which comprises the following steps: applying a compound formula base fertilizer to the land to be planted, applying calcium magnesium phosphate fertilizer, amino acid water-soluble fertilizer, potassium humate, compound bacteria and farm organic fertilizer to the land to be planted, and then carrying out harrowing operation to obtain the land in a state ready for sowing; performing ridging and film mulching sowing on the land in the state ready for sowing, planting salvia miltiorrhiza seedlings or root segments on the ridges in a double-row planting mode, and laying drip irrigation belts in the middle of the rows; performing drip irrigation at least three times during the growth of salvia miltiorrhiza; and simultaneously, applying potassium phosphite and organic water-soluble fertilizer to salvia miltiorrhiza in a leaf surface spraying mode during the growth of salvia miltiorrhiza. The salvia miltiorrhiza ecological cultivation method with high water and fertilizer utilization rate effectively improves the yield and quality of salvia miltiorrhiza, plays a positive role in protecting the agricultural ecological environment, and exhibits unique environmental protection value.

The invention relates to an organic state potassium phosphite liquid fertilizer and a preparation method thereof. The effective component of the liquid fertilizer is at least one potassium phosphite compound with the structure shown in the formula (I) to the formula (V), and phosphorous acid and specific polyhydric alcohol are subjected to esterification reaction and then neutralized with potassium carbonate or potassium hydroxide to prepare the liquid fertilizer. The liquid fertilizer has nutrition and sterilization functions, and can effectively prevent fungal and bacterial diseases; an esterification reaction product is stable in property and not prone to being oxidized into orthophosphate with oxygen to lose the sterilization effect, meanwhile, precipitation with medium trace elements is reduced, and compatibility with pesticides is good; organic ester leaves have good affinity, the structure is beneficial to direct absorption of plants, bidirectional transportation can be carried out in xylem and phloem, and the utilization efficiency is high; the foliage affinity is strong, leaves are not easy to burn after high-concentration spraying, and the foliage fertilizer is suitable for various modes such as foliage spraying and drip irrigation. The method is mild in reaction, is operated at normal temperature, does not need heating, is simple and convenient in process, and is suitable for large-scale production and popularization.

The application discloses a reusable compound leaching agent for treating arsenic contaminated soil and a use method. The method comprises the following steps: mixing and dissolving potassium pyrophosphate and potassium hypophosphite to obtain a compound leaching agent, and leaching the soil to be treated under the condition; performing solid-liquid separation on the soil after oscillation leaching, so as to obtain the repaired soil and residual leaching liquid; adding iron hydroxide and aluminum hydroxide into the residual leaching liquid, and performing solid-liquid separation after fully stirring, so that the obtained leaching liquid can be reused for leaching the arsenic contaminated soil. The compound leaching agent is formed by combining potassium pyrophosphate and potassium hypophosphite, so that the content of arsenic in the contaminated soil can be effectively reduced, the leaching liquid can be reused, the removal rate of the reused leaching agent for arsenic is high, the compound leaching agent has simple components, the leaching effect on arsenic is remarkable, the leaching agent can be reused for multiple times, the cost is low, and the compound leaching agent has a good application prospect.

The invention discloses a phosphorus source substitution-based potato green pesticide fertilizer and a preparation method thereof. The pesticide-fertilizer composition is a topdressing aqueous solution and comprises nitrogen (15-20 g / L), phosphorus (P2O5 accounts for 7-8 g / L, and phosphite accounts for 40%-50%) and potassium (K2O accounts for 10-15 g / L); the preparation method comprises the following steps: fully and uniformly mixing monopotassium phosphate, potassium nitrate, potassium phosphite, urea, potassium sulfate, magnesium sulfate, trace elements, an anti-blocking agent and the like with similar particle sizes to form three major element powder water-soluble fertilizers of 25-14-14, 19-19-19 and 14-8-30; the fertilizing method comprises the following steps: applying base fertilizer (15-15-15 compound fertilizer, 400-500 kg / ha) during planting, and carrying out drip irrigation topdressing (1000 L / ha, 5-10 times) after the seedling stage. The method can improve the potato yield, enhance the late blight resistance, significantly reduce the disease index of potato late blight, reduce the use of chemical pesticides, and promote the development of green agriculture.

The present application relates to a kind of macroelement water-soluble fertilizer and its preparation method, belong to water-soluble fertilizer field, according to percentage by weight, including urea 25~30%, potassium nitrate 30.0~35.0%, polyphosphate 15~20%, compound chelated state trace metal element 18~20%, potassium phosphite 1.0~2.0%, sodium octaborate 0.1~0.3%;The compound chelated state trace metal element includes calcium nitrate tetrahydrate, magnesium sulfate heptahydrate, ferrous sulfate heptahydrate, zinc sulfate heptahydrate, citric acid monohydrate, tartaric acid, poly-p-glutamic acid, glycine, potassium fulvic acid, mulberry bark extract and radix scrophulariae extract.The trace metal element of the present application is treated by step chelation, and the content of initial chelated state trace element is significantly higher than all the comparative examples, and the macroelement water-soluble fertilizer of the present application can effectively improve crop yield, and reduce the stress resistance of crop.

The invention relates to the technical field of biology, and particularly discloses a composition containing PHA (polyhydroxyalkanoate) and potassium phosphite as well as a preparation method and application of the composition. Research finds that after PHA which is commonly used as a mulching film material and potassium phosphite are compounded according to a specific proportion, the antibacterial, disease-preventing and growth-promoting effects of the potassium phosphite can be remarkably improved, the soil environment can be better improved, the soil EC value can be better reduced, and the soil organic matter content and phosphorus content can be better improved, so that the composition is provided. The fertilizer comprises PHA (polyhydroxyalkanoate) and potassium phosphite, the mass ratio of the PHA to the potassium phosphite is 1: (0.2-1.25). The composition provided by the invention provides a new effective promotion mode for crop cultivation, and is beneficial to yield increase.