937 results about "Nutrient content" patented technology

The invention provides a remote sensing data analysis-combined fertilizer proportion management method and system, and relates to the technical field of remote sensing data, the method comprises the following steps: using an unmanned aerial vehicle to shoot an original data set of crops in a key growth period of a target field, and preprocessing the original data set to obtain a remote sensing image set; calculating a vegetation index according to the remote sensing image set, and generating a vegetation index map in combination with GIS software; obtaining a soil nutrient content data set and a crop nutrient content data set; performing correlation modeling on the crop nutrient content data set and the vegetation index map by using a random forest regression algorithm, and performing nutrient inversion calculation on the target field by using the model to obtain a nutrient spatial distribution map; generating a fertilizer ratio decision; spatial expression is carried out on the decision result through GIS software, and a digital fertilization prescription map is obtained. The technical problems of low efficiency, large error, incomplete coverage and slow response in the prior art are solved.

The invention discloses a winter wheat field soil fertility evaluation data processing method based on comprehensive weight calculation, and relates to the technical field of data processing, and the method comprises the steps: S1, collecting nutrient content and moisture retention data from field soil through a sensor network, performing grouping processing on the acquired nutrient content and moisture retention data by adopting decision node splitting and entropy calculation to obtain a soil fertility layering result; s2, according to a soil fertility layering result, acquiring root depth and leaf moisture content indexes of the winter wheat in different layers of soil from crop monitoring equipment, analyzing association strength of the root depth and leaf moisture content indexes and fertility layering by adopting leaf node classification and feature selection standards, and determining a fertility contribution coefficient; according to the winter wheat field soil fertility evaluation data processing method based on comprehensive weight calculation, efficient resource allocation and stable yield are realized, and the drought resistance and resource utilization efficiency of winter wheat in a drought environment are remarkably improved.

The application discloses a kind of traditional Chinese medicine rose flower fermentation method and fermentation composition, it is related to fermentation technical field.The traditional Chinese medicine rose flower fermentation method includes: traditional Chinese medicine rose flower is crushed, mixed with water, and after sterilization, fermentation base material is obtained, yeast peptone solution is added, as blank fermentation pre-liquid;Activated rhamnolipid lactose casein bacillus liquid is inoculated in blank fermentation pre-liquid, and fermentation is carried out.The traditional Chinese medicine rose flower fermentation method provided by the application uses traditional Chinese medicine rose flower as raw material, and utilizes activated rhamnolipid lactose casein bacillus liquid to ferment, without adding exogenous sugar in the fermentation process, but before fermentation, yeast peptone is added first, the addition of yeast peptone can supplement nitrogen source for the fermentation process of subsequent activated rhamnolipid lactose casein bacillus liquid, so that the nutrient content of fermented rose flower is more, and component conversion is more thorough.It is favorable to improve the DPPH free radical scavenging rate, total phenol content and antioxidant property of fermentation composition.

The invention belongs to the technical field of biology, and particularly relates to plant growth promoting performance of two alkali-producing strains, namely, Plutalophilous rhizobium and Pseudomonas moorsei, and application of the two alkali-producing strains to cadmium fixation and fertility increase of soil. The invention provides a multifunctional alcaligenes, which is any one of the following strains: Pentazobacterium mionense WW22, the preservation number of which is CGMCC (China General Microbiological Culture Collection Center) No. 27718, and the preservation number of which is CGMCC No. 27718. The invention discloses pseudomonas mohnii WW2, and the preservation number of the pseudomonas mohnii WW2 is CGMCC (China General Microbiological Culture Collection Center) No.27716. The invention also provides application of the strain for fixing cadmium and increasing fertility. The strain disclosed by the invention can promote the reduction of the effectiveness of cadmium in soil and increase the nutrient content in the soil, provides a technical basis for ensuring the safe production and utilization of crops in a cadmium-polluted farmland, and has a wide application prospect.

The invention provides linseed oil rich in vitamin E and capable of enhancing linolenic acid activity and a preparation method of the linseed oil, and belongs to the technical field of edible oil processing. The preparation method of the flaxseed oil comprises the following steps: mechanically polishing and degumming flaxseeds, and then carrying out microwave thermal refining and low-temperature squeezing to obtain virgin flaxseed oil and a squeezed cake; adsorbing and deacidifying the primary oil through modified diatomite to obtain refined oil; carrying out ethanol solution ultrasonic extraction and supercritical CO2 extraction on the pressed cake to obtain a high-purity vitamin E extract; and finally, mixing the extract with the refined linseed oil to obtain the linseed oil. Through the whole-process low-temperature, physical adsorption and efficient extraction and purification process, the retention rate and enrichment degree of vitamin E are remarkably improved, meanwhile, nutritional ingredients such as alpha-linolenic acid are effectively protected, use of synthetic antioxidants is avoided, and the product has the advantages of being high in oxidation stability, good in safety, excellent in sensory quality and the like and is suitable for industrial production. The edible oil is suitable for being used as a nutritional supplement, edible oil or food additive.

The invention relates to the technical field of agricultural fertilizers, and particularly discloses a polypeptide fish protein flushing water-soluble fertilizer and a preparation method thereof, the water-soluble fertilizer is prepared from the following raw materials: unrotten small fish or fish sewer, edible cane sugar or brown granulated sugar, a self-prepared fish protein enzymolysis agent, a self-prepared fish protein anaerobic fermentation inoculant and water; the preparation method comprises an enzymolysis stage and a fermentation stage. The compound fertilizer can be used as a nitrogen fertilizer to replace a traditional chemical nitrogen fertilizer, or is matched with a trace element fertilizer in a compound fertilizer to be used in crop planting; the water-soluble fertilizer has the beneficial effects that the water-soluble fertilizer can supplement soil protein amino acid fertilizer nutrition and increase the content of nutritional ingredients in crops, fermented polypeptide micromolecule sugar can be directly absorbed by the crops to improve the taste, ecological organic planting is realized, meanwhile, the planting cost is reduced, and the water-soluble fertilizer is suitable for fruit and vegetable planting families, farms, picking gardens, greenhouse farmers and the like, is simple and easy to operate, and is suitable for popularization and application. Raw materials are easy to collect, low in cost and obvious in effect.

The invention is suitable for the technical field of laying hen feed preparation, and particularly relates to a laying hen feed preparation method which comprises the following steps: acquiring nutritional ingredient data of various feed raw materials; dividing the nutritional ingredient data to obtain a first type of nutritional ingredient data of each raw material and a second type of nutritional ingredient data of each raw material; combining the first type of nutrition component data of each raw material according to the nutrition complementarity of each raw material to obtain combined nutrition data corresponding to the first type of nutrition component data; performing quantitative proportioning on the combined nutrition data to obtain a main ingredient group, and performing quantitative proportioning on the second type of nutrition component data of each raw material to obtain an auxiliary ingredient group; and preparing based on the main ingredient group and the auxiliary ingredient group to obtain the final formula. The preparation method of the laying hen feed provided by the invention can solve the technical problem that the calculated formula is optimal in theoretical cost, but the actual feeding effect is not optimal, so that the egg laying quality is low.

The invention provides a microbial agent type bio-organic fertilizer capable of improving continuous cropping tobacco planting soil hardening and a preparation method of the microbial agent type bio-organic fertilizer, and belongs to the technical field of organic fertilizers. The microbial agent type bio-organic fertilizer capable of improving continuous cropping tobacco planting soil hardening comprises the following raw materials: an organic material, a microbial agent, an inorganic nutritional ingredient, vinasse and an additive, wherein the organic material is composed of livestock and poultry manure, crop straw, tobacco waste and a fermentation inoculant; the additive is prepared from humic acid, seaweed extract and amino acid. The organic fertilizer contains rich organic materials and humic acid, the content of organic matters in soil can be increased, the granular structure of the soil can be improved, the growth of soil-borne pathogenic bacteria can be inhibited by the added multiple beneficial microorganisms, the micro-ecological environment of the soil can be improved by the photosynthetic bacteria, and the incidence rate of diseases such as tobacco black shank and bacterial wilt can be reduced.

The invention provides an edible fungus cultivation material with pilose antler mushroom residues as a raw material and application of the edible fungus cultivation material, and belongs to the technical field of edible fungus cultivation. The invention provides an edible fungus cultivation material taking pilose antler mushroom dregs as a raw material, which is characterized by comprising the following components in percentage by mass: 70-90% of pilose antler mushroom dregs and 10-30% of chaff. The edible mushroom cultivation material prepared from the pilose antler mushroom residues is applied to artificial cultivation of straw mushrooms, tricholoma matsutake and bamboo fungi, can effectively reduce the production cost of the straw mushrooms, the tricholoma matsutake and the bamboo fungi, can improve the yield of the mushrooms and the utilization value of the pilose antler mushroom residues, can also improve the nutritional ingredients and microbial structures of soil, and plays a role in partially replacing chemical fertilizers.

The invention relates to the technical field of nutritious food configuration, and discloses a system and a method for configuring personalized nutritious food, and the method for configuring personalized nutritious food comprises the following steps: collecting spectral characteristic data and chemical component data of a food material sample by adopting a hyperspectral imaging and mass spectrum combined technology, and obtaining holographic chemical fingerprint information; processing the collected spectral data by using a multi-scale feature extraction algorithm, extracting multi-level feature information of the food materials, and carrying out standardization and dimension reduction processing on the feature data; according to the method, high-precision prediction of the nutrient content of the food material is realized through combination of hyperspectral imaging and mass spectrometry technologies and a deep learning model, so that the nutrient content prediction accuracy and the configuration scheme accuracy are improved, the nutrient balance achievement rate is also improved, and meanwhile, the limitation of a static database is broken through; real-time nutritional ingredient analysis of any food material is achieved, the method can adapt to individual differences and freshness changes of the food materials, and accurate configuration based on actual food material characteristics is provided.

The invention provides a soil comprehensive nutrient evaluation method and device based on a satellite remote sensing image, equipment and a medium. The method comprises the following steps: acquiring a Sentinel-2 multispectral image, cultivated land vector boundary data and actually measured soil nutrient data of a target area; establishing a multiple linear regression model by utilizing the wave band reflectivity of the Sentinel-2 multispectral image and actually measured soil nutrient data, generating a region-level nutrient content grid map, and extracting a nutrient content grid map of soil in a cultivated land range of a research region; classifying the grid map by adopting a spatial constraint natural breakpoint method clustering target function; a three-digit decimal code is adopted to represent a grading result, a soil comprehensive nutrient spatial distribution diagram is generated, coordinated color matching is set, various areas and proportions of soil comprehensive nutrients are counted, and fertilization suggestions are given, so that the defects of single sensing dimension and disjunction of decision support during remote sensing monitoring of the soil nutrients are overcome; and a closed loop serving precision agricultural practice is difficult to form.

The present application belongs to the technical field of medical care, and particularly relates to a nutrient solution delivery device for assisting in nursing of esophageal cancer patients, which comprises a mounting seat, the inside of the mounting seat is provided with a fixing part, the fixing part can extrude and fix the nutrient bag placed inside to avoid the nutrient bag from deviating during the operation of the equipment; the inside of the fixing part is provided with a driving part, the driving part moves back and forth inside the mounting seat, the driving part can extrude the nutrient solution inside the nutrient bag to flow during the back and forth movement; the inside of the driving part is further provided with a stirring part which rotates, the stirring part can rotate by using the power of the back and forth movement of the driving part, and the rotation of the stirring part further promotes the flow of the nutrient solution inside the nutrient bag; the inside of the mounting seat is provided with a delivery part. The present application uniformly heats the nutrient solution and delivers it into the gastrointestinal tract of the patient, the warm nutrient solution can promote blood circulation and increase the peristalsis of the intestinal tract, which is helpful to improve the digestion and absorption rate of the nutrient components.

The invention discloses a seed coating containing an arbuscular mycorrhizal inoculant. The seed coating is prepared from the following components in parts by weight: 25 to 35 parts of the arbuscular mycorrhizal inoculant, 35 to 45 parts of a soil conditioner, 15 to 20 parts of talcum powder and 15 to 20 parts of polyvinyl acetate. The invention further provides a preparation method of the seed coating containing the arbuscular mycorrhizal inoculant and application of the seed coating to reduction of soil heavy metal pollution, increase of disease resistance and stress resistance of crops and promotion of crop growth. The seed coating containing the arbuscular mycorrhizal inoculant wraps the surfaces of plant seeds, provides good nutritional ingredients for growth and development of the seeds, and is beneficial to improving the germination rate of the seeds under heavy metal cadmium stress, reducing soil heavy metal cadmium pollution, improving soil quality, increasing soil fertility and improving disease resistance and stress resistance of crops; growth of seedlings is promoted, and crop quality and yield are improved.

The utility model discloses a rapeseed stir-frying machine, which relates to the technical field of oil product processing and comprises a base, seed stir-frying components are fixedly mounted at the left and right parts of the upper end of the base, and a feed filtering component is fixedly mounted at the right part of the top of each seed stir-frying component. According to the rapeseed frying machine disclosed by the utility model, rapeseeds in the heating furnace can be turned and fried through the seed frying assembly, and can be conveyed to the left part of the inner cavity of the heating furnace during frying. Rapeseeds entering the heating furnace can be filtered and screened in advance through the feeding filtering assembly, and impurities in the rapeseeds are separated and collected. Rapeseeds discharged by the heating furnace can be guided onto the electric conveying belt through the guide plate by the conveying air-cooling assembly, so that the rapeseeds can be subjected to air cooling in the tiled conveying process, and the temperature of the fried rapeseeds is rapidly reduced by a plurality of air spraying heads, so that the oxidation reaction can be inhibited, and the damage of high temperature to nutritional ingredients can be reduced.

Disclosed herein is a method for producing a lipid or oil in a plant, the method comprising genetically modifying the plant to express a plurality of heterologous proteins selected from PaWRI1, PaWRI2, PaDGAT1, or PaPDAT1, or variants thereof. The expression of the plurality of heterologous proteins in the genetically modified plant may result in a change in the nutrient profile of the plant relative to non-genetically modified plants of the same species. Also disclosed herein is a method for producing fatty acid and triacylglycerol content in plant non-seed tissue. Further disclosed herein is a method for producing a genetically modified plant.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention discloses a black land plough layer soil construction method based on a bio-organic fertilizer, and aims to solve the problems of black land soil degradation and fertility decline. The functional bio-organic fertilizer containing nitrogen-fixing bacteria, phosphate solubilizing bacteria and potassium solubilizing bacteria is prepared, and scientific and accurate fertilization is realized by combining soil physicochemical property determination and mathematical model optimization. The method specifically comprises the following steps: measuring the nutrient content and pH value of soil and fertilizer, constructing a mathematical model to obtain optimized application parameters, and continuously improving the soil fertility and productivity by dynamically adjusting the fertilizer application amount and evaluating the soil fertility, thereby reducing the dependence on chemical fertilizer, improving the soil structure and improving the crop yield. The method has the characteristics of environmental friendliness, accuracy, high efficiency and high sustainability.

The invention relates to the technical field of microorganisms, in particular to a strain of Senotrophomonas sepilia DB3 with disease-resistant, iron-dissolving and growth-promoting functions and application thereof, and the strain is separated from calcareous soil pear tree rhizosphere and has good capabilities of producing IAA (Indoleacetic Acid), quickly growing, dissolving insoluble iron, producing iron carriers and effectively antagonizing various pathogenic bacteria. Pot experiments show that the DB3 microbial inoculum can significantly promote growth of peanut and pyrus betulaefolia seedlings, improve root development and iron nutrient content, enhance leaf SPAD value and iron absorption and relieve iron-deficiency yellows, can be used for preparing biological bacterial fertilizers and reducing chemical iron fertilizer investment, and has good development and application prospects.

The invention provides bacillus velezensis as well as a liquid microbial agent, a solid microbial agent and application thereof, and belongs to the technical field of microbial agents. The bacillus velezensis is bacillus velezensis TP-06-01, and the preservation number of the bacillus velezensis is CCTCC (China Center For Type Culture Collection) NO: M2025693. The liquid fungicide or the solid fungicide obtained by utilizing the bacillus velezensis can promote plants to resist the harm of heavy metals and / or salinization, and can also improve the nutrient elements and / or nutritional ingredients of the plants. In addition, under the heavy metal pollution condition or the salinization condition, the liquid fungicide or the solid fungicide can promote plant growth.

The invention discloses application of EGCG (epigallocatechin gallate) in preparation of feed for reducing mutton smell of Hu sheep, and belongs to the technical field of livestock and poultry feed. By adding epigallocatechin gallate into the Hu sheep feed, the proportion of muscle fatty acid of the Hu sheep can be reduced, specifically, the proportion of heptadecanoic acid and stearic acid is reduced so as to reduce the mutton smell of the Hu sheep, and the growth performance is not affected. Meanwhile, the raw materials of the prepared feed have universality, the peanut vines, the hybrid pennisetum alopecuroides, the garlic skin and the like are regional high-yield coarse feed, and the source of nutritional ingredients of daily ration is not limited; eGCG powder can be directly added into an existing feed production line, equipment does not need to be transformed, and good application prospects are achieved.

The invention discloses a production process of a high-potassium-based compound fertilizer, which comprises the following steps: S1, raw material pretreatment: crushing potassium feldspar to 200 meshes, mixing with 5% sulfuric acid according to a mass ratio of 1: 3, calcining at 120-130 DEG C for 2-3 hours, washing with water until the pH is 6.5-7.0, and drying to obtain potassium feldspar activated powder; s2, putting a potassium citrate solution, a calcium citrate solution, potassium feldspar activated powder, a trace element organic acid salt solution, urea, modified zeolite and a binder into a high-speed mixer in proportion, uniformly stirring, and granulating by adopting a high tower to obtain base material particles; s3, the base material particles are dried, broken particles with the diameter smaller than 2.5 mm are removed, multiple layers of composite films are sprayed to the surfaces of the base material particles for coating, and coated base material particles are obtained after drying; and S4, spraying a bacillus subtilis microbial agent on the surfaces of the coated base material particles, and drying at low temperature to obtain the high-potassium-based compound fertilizer. The high-potassium-based compound fertilizer produced by the invention has the advantages of high nutrient content, long fertilizer efficiency and small environmental pollution, and can improve the soil environment and increase the crop yield.

The invention provides a nutrient balance calculation method, device and equipment and a storage medium, and the method comprises the steps: obtaining crop related data of crops in a target region, the nutrient content of an organic fertilizer, the heavy metal content of manure, and soil related data of the target region, determining the maximum application amount and the safety upper limit of the manure based on the related data, the manure heavy metal content, the organic fertilizer nutrient content and the soil related data, and determining the safety upper limit of the manure based on the safety upper limit and the maximum application amount of the manure; determining total nutrient data of the crop in the whole growth period based on the related data, and determining restrictive elements based on the total nutrient data; determining the maximum application amount of the organic fertilizer based on the restrictive elements, the manure safety upper limit and the total nutrient data; and based on the maximum application amount of the organic fertilizer, the total nutrient data and the manure nutrient content, determining the chemical fertilizer supplement amount of the target area.

The invention provides a saline-alkali soil conditioner as well as a preparation method and application thereof, and belongs to the technical field of soil improvement. The saline-alkali soil conditioner is prepared from the following raw material components in parts by mass: 80 to 90 parts of edible fungus residues, 10 to 20 parts of humic acid and 0.1 to 0.3 part of a microbial agent. The saline-alkali soil conditioner provided by the invention can obviously reduce the pH and total salt content of the surface layer of soil, obviously improve the content of nitrogen nutrients in the soil, optimize the distribution structure of the nitrogen nutrients and reduce the risk of nitrogen leaching loss. Meanwhile, the water and fertilizer retention capacity of soil can be improved, soil nutrients can be supplemented, the soil fertility can be improved, the harm of soil salinity to crops can be reduced, and the stress resistance and the yield of the crops can be improved. The soil conditioner for the saline-alkali land can solve the problems that at present, soil of salinized farmland in Hetao irrigation districts is prone to hardening, the soil fertility is low, the soil water and fertilizer utilization rate is low, and the crop biomass is low.

The invention relates to the technical field of freeze-drying preparation, and discloses fast food cooking bag freeze-drying block preparation equipment which comprises a heating barrel and a shell, the heating barrel comprises a barrel body and a barrel cover installed at the top of the barrel body through a flange, and the top of the barrel cover of the heating barrel is fixedly connected with a feeding pipe and a liquid inlet pipe; the invention further provides a preparation method of the fast food cooking bag freeze-dried block, and the preparation method comprises the following steps: S1, boiling: adding cold water into the heating barrel through the liquid inlet pipe, boiling the water in the heating barrel through the heating wire, and the like. According to the invention, the nutritional ingredients and trace elements of the freeze-dried block are almost the same as those of fresh materials, the color, aroma and taste are not changed, and the mouth feel is ensured, so that the original color, aroma, taste and nutritional ingredients are maintained, the added value of the product is improved, the market demand is met, and the seasoning freeze-dried block has richer flavor and nutritional value and is suitable for industrial production. The requirements of consumers on diversified foods are met.

The invention discloses an under-forest ecological efficient cultivation method for abrus cantoniensis hance, and belongs to the technical field of abrus cantoniensis hance planting. By interplanting the abrus cantoniensis hance under the arbor forest, the optimal interplanting mode of interplanting the abrus cantoniensis hance under the Chinese fir forest is found, and the mode can improve the utilization efficiency of the forest land, reduce the planting cost and increase the economic benefit; the harm of weeds and diseases and pests is reduced, the use of weeding labor and pesticides is reduced, water and soil loss is reduced, water and soil are kept, and good ecological benefits are achieved. According to the method, a scientific basis is provided for selection of a cultivation mode for interplanting the abrus cantoniensis hance under the forest. In ecological management, if the yield and the nutrient content of the abrus cantoniensis hance are improved as a target, a cedarwood forest stand is preferentially selected for interplanting.

The invention provides a preservation method of fresh-cut purple sweet potatoes, which comprises the following steps: peeling and slicing the purple sweet potatoes, carrying out heat treatment at 50 DEG C for 5 minutes, soaking in a fermentation extracting solution containing 50% of bacillus subtilis, 50% of garlic extracting solution, 0.4% of calcium chloride, 0.04% of melatonin and 0.3% of citric acid, treating for 15 minutes, airing, carrying out vacuum packaging, and finally refrigerating and storing at 4 DEG C. The method effectively inhibits browning of the fresh-cut purple sweet potatoes, maintains the color, hardness and nutritional ingredients of the fresh-cut purple sweet potatoes, and prolongs the shelf life. The method has the advantages of greenness, harmlessness, simplicity in operation, remarkable preservation effect and the like, and a new technical scheme can be provided for preservation of the fresh-cut purple sweet potatoes.

The invention discloses a water-soluble fertilizer containing humic acid. The water-soluble fertilizer comprises the following components in parts by weight: 5-8 parts of ammonium sulfate, 28-32 parts of calcium ammonium nitrate, 18-22 parts of monoammonium phosphate, 32-38 parts of potassium sulfate and 10-15 parts of modified potassium humate. The preparation method comprises the following steps: carrying out alkali extraction on modified humic acid obtained by modifying lignite to prepare modified potassium humate, adding the modified potassium humate into a fertilizer raw material, and granulating to prepare the humic acid-containing water-soluble fertilizer. The preparation process comprises the following steps: S1, crushing and sieving the ammonium sulfate, the calcium ammonium nitrate, the monoammonium phosphate and the potassium sulfate, adding the modified potassium humate into a granulator in proportion, and uniformly stirring to obtain a mixture; s2, urea and water are prepared into a solution according to the mass ratio of 1: 3; and S3, uniformly spraying the urea guniting solution prepared in S2 into the raw material layer, and stirring until liquid drops and powder are in full contact to form particles to prepare the fertilizer. The humic acid-containing water-soluble fertilizer produced by the invention has the advantages of high nutrient content, soil structure improvement, crop root growth promotion and yield increase.

The invention discloses modified biochar as well as a preparation method and application thereof, and belongs to the technical field of aerobic composting additives, the preparation method of the modified biochar comprises the following steps: adding corn straw biochar into a Na2HPO4 solution according to a solid-to-liquid ratio of 1g: (5-10) mL by adopting an impregnation method, adjusting the pH value of a mixed system to 10.8-11.2 by adopting an alkali liquor, and stirring to obtain a mixed solution; then carrying out magnetic stirring reaction, and after the reaction is finished, carrying out centrifugal separation, washing and drying to obtain the modified biochar. The prepared modified biochar is used as an aerobic composting additive, so that greenhouse gas emission can be remarkably reduced, nitrogen retention and compost nutrient content are improved, compost maturity is promoted, plant toxicity is reduced, and a microbial community structure is directionally regulated and controlled. According to the invention, the functionality of the biochar is enhanced through chemical modification, the synergism of pollution reduction, synergism, carbon sequestration and decay promotion is realized, and an effective technical path is provided for realizing low-carbon, efficient and sustainable organic waste resource utilization.

The invention provides a method for cultivating volvariella volvacea by taking bamboo reed as a substrate raw material. Evaluation from multiple dimensions such as the growth speed, commodity characters and nutritional ingredients of the straw mushrooms finds that the normal growth of the straw mushrooms is not influenced by adding a proper amount of the bamboo reed, and the content of the nutritional ingredients such as protein, essential amino acid and mineral substances can be increased. However, when the content of the bamboo reed in the culture medium is too high, the growth condition and commodity characters of the volvariella volvacea can be influenced to a certain extent, and the best alternative culture medium is obtained by matching 60% of the bamboo reed with 40% of the cottonseed hulls according to the comprehensive results.

The invention relates to an oil preparation method based on an oil material cell reactor principle, which comprises the following steps: S1, comprehensively grading rapeseeds into mature grains and immature grains according to appearance color and grain size; s2, performing after-ripening reaction on the sorted immature rapeseed grains under the conditions of natural illumination or artificial illumination or both of the natural illumination and the artificial illumination and certain temperature and humidity; s3, merging the ripe rapeseeds sorted in the step S1 and the rapeseeds subjected to light-promoted after-ripening treatment in the step S2, and putting the merged rapeseeds in a microwave field or an infrared field or a multi-physical field of the microwave field and the infrared field for collaborative pretreatment so as to continue cell reaction; s4, the rapeseeds subjected to multi-field collaborative pretreatment are subjected to tempering and then guided into a low-temperature oil press to be squeezed to prepare oil; and S5, cooling the squeezed crude oil, and then carrying out precision filtration at a relatively low temperature to obtain finished oil. According to the method, migration of natural nutritional ingredients into oil and generation of a large amount of pleasant aroma substances are promoted at a relatively low temperature, and high-quality edible oil is produced.