407 results about "Nutrient loss" patented technology

The invention discloses a compound fertilizer production nutrient optimization method based on industrial data, relates to the technical field of compound fertilizer production, and firstly solves the problem of unbalanced nutrient release; through the steps S1 and S2, a compound fertilizer production process is decomposed, soil and crop growth related data are collected, an image data processing technology is combined, a plant growth rate Gs and a nutrient supply and demand difference Ns are calculated, and through evaluation of a first supply and demand difference threshold Q1 and a second supply and demand difference threshold Q2, a nutrient release rate is adjusted in time, matching of nutrients and a crop growth cycle is ensured, and the quality of the compound fertilizer is improved. Excessive or insufficient nutrients are avoided; secondly, the trace demand Mn is calculated and evaluated through the step S3, the problem of lack of trace elements is solved, trace element supply is adjusted in time, and it is ensured that crops obtain needed support; and finally, calculating a nutrient loss compensation index Li through the step S4, estimating nutrient loss and adjusting fertilization, so that the applicability of the compound fertilizer under complex climate conditions is improved.

The invention relates to the technical field of organic fertilizers, and discloses an agricultural waste two-stage fermentation bio-organic fertilizer and a preparation method thereof.The bio-organic fertilizer comprises 70%-80% of a mixture of livestock and poultry manure and straw subjected to anaerobic fermentation and aerobic fermentation two-stage treatment, 5%-10% of auxiliary organic matter, 3%-5% of a soil improvement material, 2%-4% of a functional additive and 1%-3% of a microbial preparation. The preparation method comprises the following steps: mixing the livestock and poultry manure and the straw according to a carbon-nitrogen ratio of 30: 1, and performing pretreatment; carrying out anaerobic fermentation for 7 days, and collecting biogas; performing solid-liquid separation to obtain a solid material and biogas slurry; concentrating the biogas slurry to prepare a leaf fertilizer; adding a microbial preparation into the solid material, and carrying out aerobic fermentation for 10-15 days; after fermentation is completed, drying, functional component adding, granulating, screening and packaging are conducted, a finished product is obtained, collaborative integration of anaerobic-aerobic fermentation and full-quantitative utilization of agricultural waste are achieved, and the method has the remarkable advantages of being short in fermentation period, small in nutrient loss, high in functionality and the like.

The invention belongs to the technical field of soil improvement, and discloses a preparation method of a manganese slag-coconut shell charcoal-desulfurized gypsum composite soil improvement agent, the soil improvement agent and application. The preparation method of the soil conditioner comprises the working procedures of manganese residue pretreatment, coconut shell pretreatment, precursor preparation, precursor calcination and conditioner compounding, the pretreated coconut shell and the pretreated manganese residue are mixed and then subjected to ball milling, and a manganese residue-coconut shell precursor is obtained; calcining the prepared manganese residue-coconut shell precursor for 1-4 hours at the temperature of 450-650 DEG C in a protective gas atmosphere to obtain manganese residue-coconut shell biochar; and doping desulfurized gypsum powder into the prepared manganese slag-coconut shell charcoal, and uniformly dispersing to obtain the manganese slag-coconut shell charcoal-desulfurized gypsum composite soil conditioner. The method disclosed by the invention has the advantages of low energy consumption, low cost and capability of treating waste with waste, and the prepared soil conditioner has the advantages of improving soil nutrient balance, reducing nutrient loss and stabilizing pH, and is suitable for modifying the acid soil of the rubber plantation in the tropical region.

The invention relates to the technical field of agricultural machinery, and specifically to a wheat double-axis rotary tillage sowing and fertilizing integrated machine, comprising a storage box, wherein the storage box comprises a box body, and a partition is fixedly installed on the inner side wall of the box body, the partition divides the internal space of the box body into a fertilizer bin and a seed bin, and a bracket is fixedly installed on the bottom end of the box body; through the reciprocating trajectory movement of the bottom plate inside the U-shaped frame, in conjunction with a highly staggered feeding pipe, the fertilizer inside the fertilizer bin and the seed bin and the wheat seeds are fertilized and sown in a deep and shallow manner, thereby improving the fertilizer and reducing the nutrient loss caused by water evaporation or leaching, the deeply buried fertilizer can better maintain moisture in a deeper soil layer, reduce nutrient loss, and wheat seeds at different depths will have different growth rates in the early growth stage, which is helpful to form a more uniform crop group, reduce resource competition caused by excessive density, and thus improve soil utilization and crop yield.

The invention provides a fertilizer synergist for reducing nutrient loss and inhibiting nitrification and application of the fertilizer synergist. The fertilizer synergist is prepared from the following components in percentage by mass: 95 to 98 percent of carboxyl cross-linked modified montmorillonite, 0.05 to 0.1 percent of mannan oligosaccharide, 0.1 to 0.5 percent of mannan, 1 to 3 percent of polyaspartate and 0.5 to 2 percent of a nitrification inhibiting aid. According to the fertilizer synergist capable of reducing nutrient loss and inhibiting nitrification and the application of the fertilizer synergist, the fertilizer synergist serves as a plant nutrient loss control synergist and a nitrification inhibitor and can activate a crop stress resistance signal source, promote and induce synthesis of endogenous auxin in plants, root and growth, activate phosphorus and dissolve potassium, reduce nitrogen loss and improve the yield of the plants. The fertilizer utilization rate is improved.

The invention provides a whole-course green rapid improvement method for a severe soda saline-alkali paddy field, and belongs to the technical field of soil improvement. The method is suitable for paddy field improvement of severe soda saline-alkali soil with 0-20 cm surface soil layer alkalization degree of more than 20%, and is characterized in that the whole process is green and rapid. The rapid improvement method for the soda saline-alkali soil paddy field is different from a traditional pure solid improvement mode, a solid-liquid combined whole-growth-period comprehensive improvement technology is adopted, and the production technical problems that solid improvement is low in uniformity and poor in pertinence are solved. The pH value of soda saline-alkali paddy field soil and water is rapidly reduced, salt in the soil is rapidly dissolved, the effect of rapid salt and alkali removal is achieved through field steeping and salt leaching measures, and meanwhile nutrient loss in the salt and alkali removal process is reduced.

The invention discloses a composite conditioner for acid soil of slope cropland and application of the composite conditioner. The conditioner comprises the following components in percentage by mass: 12%-18% of calcium peroxide, 18%-32% of a buffer mineral compound, 1.5%-3.0% of an anti-scouring controlled-release material, 10%-25% of a nutrient carrier and fertilizer, 0.5%-3.0% of a binder and a granulation aid, and the balance of inert filler and water. The preparation process comprises the steps of dry mixing, granulation, drying and coating. The product provided by the invention can realize high residue of CaO and stable pH under the condition of heavy rainfall of slope cropland, effectively inhibit the pH fall of acid soil, reduce aluminum toxicity and reduce nutrient loss. By controlling the content and proportion of the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material, the calcium peroxide, the buffer mineral compound and the anti-scouring controlled-release material have a synergistic effect in a slope cropland environment, so that not only is the initial rapid acid inhibition capability ensured, but also the lasting pH stability and high residual rate are realized through buffer and controlled-release technologies.

The invention relates to the technical field of grain germination, in particular to a brown rice germination machine and a brown rice germination method, and solves the problems of nutrient substance loss and water resource waste caused by grain soaking germination in the prior art. The germination machine comprises a shell, a germination cavity is formed in the shell, and a spraying assembly and an atomizing assembly are arranged in the shell; the output end of the spraying assembly and the output end of the atomization assembly extend into the germination cavity, and the spraying assembly and the atomization assembly are connected with the water supply assembly. A temperature control assembly is arranged in the germination cavity; and a far infrared lamp strip and an ultraviolet lamp strip are arranged in the germination cavity. The brown rice germination device has the beneficial effects that the humidity in the germination cavity is adjusted by adopting a spraying and atomizing combined mode, brown rice germination is performed by adopting a non-soaking method, the loss of nutrient substances such as GABA during liquid filtration is effectively avoided, and the content of the nutrient substances in the germinated brown rice is ensured; and spraying and atomization are adopted, so that the use amount of water can be effectively reduced, the amount of filtered water after the brown rice sprouts is reduced, and the waste of water resources is reduced.

The invention discloses a forest planting fertilizer applicator device for repairing degenerated forests in the north, south and south, which belongs to the technical field of forest planting and comprises a rack, moving wheels rotatably mounted at the bottom of the rack and a handle positioned at the rear end of the rack. Through cooperation of the rack side edge fixing pipe and the inner vertical sliding insertion pipe, the insertion pipe top end rapid pulling and inserting mechanism is combined, efficient insertion and soil pulling out operation of the insertion pipe can be achieved, through cooperation of the side edge quantitative discharging mechanism, precise quantitative fertilization during insertion is ensured, automatic fertilizer release is completed through the insertion pipe bottom end release mechanism, and the labor intensity of workers is relieved. According to the drawing and inserting type fertilization mode, the fertilization depth and spacing can be accurately controlled, a forest root system concentration area uniformly absorbs nutrients, the fertilizer can be directly injected into the deep layer of soil, nutrient loss caused by surface evaporation and rain wash is reduced, meanwhile, tiny holes are only formed in the target position, and compared with a traditional ploughing and ditching mode, the fertilization efficiency is greatly improved. Surface vegetation and soil structures are reserved to the maximum extent, and the wind erosion desertification risk is reduced.

The invention provides a cooking control method, device and system and a storage medium. The cooking control method comprises the following steps: acquiring image information of a cooking utensil in which a target cooking food material is placed; determining initial nutritional ingredient information of the target cooking food material based on an image recognition result of the image information; in the cooking process, the current operation parameter information of the cooking utensil and the current state parameter information of the target cooking food material are monitored; performing nutrient loss prediction based on the initial nutrient information, the current operation parameter information and the current state parameter information to obtain estimated nutrient information; and adjusting a preset cooking strategy based on the target nutrition information and the estimated nutritional ingredient information to obtain a target cooking strategy. According to the invention, image recognition can be carried out on the target cooking food material, the target cooking food material is automatically monitored and the nutritional ingredients are tracked and predicted, the prediction accuracy is high, and the content of the residual nutritional ingredients after cooking can be increased.

According to the high-temperature-resistant nitrogen-fixing bacteria microcapsule fertilizer and the preparation method thereof, aiming at the problems of thallus inactivation and nutrient loss in a high-temperature environment, a sodium alginate-chitosan double-layer embedding technology is combined with magnetic nanoparticle modification, and a stable double-layer structure is formed by optimizing the ratio of an embedding material, so that the high-temperature-resistant nitrogen-fixing bacteria microcapsule fertilizer is prepared. The survival rate and activity of the nitrogen-fixing bacteria at high temperature are remarkably improved, and meanwhile, the functions of intelligent nutrient release and magnetic recovery are achieved. The fertilizer is prepared from composite microcapsules, amino acid, humic acid and other raw materials according to a specific ratio through magnetic field orientation treatment, multi-stage mixing, atomization granulation and magnetic field screening processes, the particle size is controlled to be 0.5-3.35 mm, and the shelf life is prolonged to 12 months. The method has the technical effects that trehalose-glycerol / sorbitol synergistically forms a glassy protective film to maintain the stability of thalli, gamma-aminobutyric acid activates nitrogenase gene expression, magnetic nanoparticles construct a photosynthetic symbiotic system to optimize rhizosphere oxygen supply, and silanized FeO nanoparticles fix heavy metal ions through electrostatic adsorption, so that the heavy metal ions in the thalli are effectively adsorbed, and the heavy metal ions in the thalli are effectively adsorbed. And the humic acid buffers the pH fluctuation of the soil, so that the nitrogen fixation efficiency is finally improved by 30-50%, and the crop yield is increased by 15-25%.

The invention relates to the technical field of compound fertilizers, and discloses a compound fertilizer with long-acting slow release and accurate oxygen supply functions and a preparation method thereof, and the compound fertilizer comprises 35-40 parts of an organic waste base material, 20-30 parts of inorganic nutrients, 5-8 parts of a binder, 2-4 parts of medium trace elements, 4-6 parts of humic acid, 2-4 parts of sodium carboxymethyl cellulose, 3-5 parts of chitosan and 3-5 parts of sodium alginate. According to the invention, chitosan and sodium alginate are adopted to form a double-layer coating on the surfaces of fertilizer particles, the outer sodium alginate forms a film with certain permeability, firstly, the film has a barrier effect on fertilizer nutrients and delays the diffusion speed of the nutrients into soil, the inner chitosan further regulates and controls nutrient release, and the chitosan and the sodium alginate have a synergistic effect, so that the slow release of the nutrients is realized. The nutrient release period is greatly prolonged, so that fertilizer nutrients can be continuously and stably supplied to soil, the problem of rapid nutrient loss after one-time fertilization is reduced, and lasting nutrient support is provided for crop growth.

The invention relates to the technical field of agriculture, and discloses an organic-inorganic compound fertilizer containing humic acid, which comprises the following components in percentage by mass: 5-25% of nitrogen; 9%-26% of phosphorus; 8%-28% of potassium; 5%-10% of humic acid; 60%-80% of an organic material; 0.5%-2% of medium trace elements; 0.5%-1% of a microbial agent; the organic material comprises but is not limited to lignite, straw powder or a combination thereof; the medium trace elements comprise the following components in percentage by mass: 30%-40% of zinc; 20% to 30% of iron; 10% to 20% of calcium; 20% to 30% of magnesium; the microbial agent comprises one or more of nitrogen-fixing bacteria, phosphorus dissolving bacteria and potassium dissolving bacteria. Nitrogen, phosphorus, potassium, humic acid and medium trace elements are chelated, so that nutrients are in a stable release state in soil, and the problem of nutrient loss caused by too fast dissolution of a conventional fertilizer is effectively avoided.

The invention relates to the technical field of agriculture, in particular to a method for improving silage fermentation quality based on biochar regulation and control, which comprises the following steps: fermenting a silage raw material added with biochar and cane sugar in a closed environment, the addition amount of the biochar being not less than 2% of the fresh weight of the silage raw material; the addition amount of the sucrose is not less than 2% of the fresh weight of the silage raw material; the fermentation days are more than or equal to 30 days, the pH value of the silage is less than or equal to 4.35, and the total content of lactic acid, acetic acid, propionic acid and butyric acid in the silage is more than or equal to 7.99% of the dry weight of the silage. When the biochar and the cane sugar are used as additives to prepare the silage through fermentation, on one hand, the pH value can be balanced through the addition of the biochar, the situation that the pH value is rapidly reduced possibly due to independent use of the cane sugar is avoided, further production of lactic acid in the later period is inhibited, the acidification process is effectively buffered, and continuous and stable lactic acid generation is promoted; on the other hand, the problems of increase of nutrient substance loss, promotion of generation of byproducts such as acetic acid, reduction of generation of lactic acid and the like when the biochar is independently added are avoided.

The invention relates to the technical field of mountain peach kernels, in particular to a debitterizing process of mountain peach kernels. The method comprises the steps of raw material pretreatment and crushing, gradient heating extraction debitterizing, double-fluid dynamic separation and purification, countercurrent cleaning, automatic solid-liquid separation and the like. In the debitterizing process of the mountain peach kernels, a double-channel ultrasonic composite extraction unit is used for performing low-temperature three-dimensional crushing, cell walls are broken through a matrix and discrete type ultrasonic-assisted extraction technology, bitter substances are fully exposed, the wall breaking rate of raw materials is increased, and the problem of low debitterizing efficiency caused by insufficient crushing in a traditional process is solved; a gradient heating extraction mode of a functional protein continuous extraction unit is adopted, through sectional temperature control, fatty acid oxidation and bad flavor generation caused by high temperature are prevented, loss of nutritional ingredients is reduced, the edible taste and flavor stability of the wild peach kernels are improved, and the nutrient retention rate and functional activity of the raw materials are also improved; the problem that nutritional ingredients are seriously damaged in a traditional process is solved.

The invention belongs to the technical field of microorganisms, and discloses a preparation method of a microbial agent and an organic fertilizer. The microbial agent comprises the following raw materials in parts by weight: 10-20 parts of a complex microbial agent, 5-10 parts of an accelerant and 5-10 parts of nutrient substances, the complex microbial inoculants comprise bacillus velezensis, pseudomonas monteilii and lactobacillus pentosus; the accelerant comprises modified saponin. The synergistic prevention and control effect on disease prevention and control when the bacillus velezensis, the pseudomonas monteilii and the lactobacillus pentosus are used in a composite mode is utilized, diseases are greatly reduced, and yield and income are increased. Meanwhile, the surface activity of the modified saponin can promote attachment of microorganisms on the surfaces of soil particles and plant roots, and the activity and utilization efficiency of the microorganisms are improved; the fertilizer can also form a stable compound with nutritional ingredients in the organic fertilizer, so that the loss of nutrients is reduced; trehalose is added to serve as a nutritional ingredient for rapid proliferation of microbial flora.

The invention discloses a water-soluble fertilizer containing modified nano double-chelated medium trace elements, and belongs to the technical field of biological agriculture. The fertilizer is composed of sorbitol, glycerin, EDTA iron, EDTA zinc, potassium citrate, calcium citrate, magnesium sulfate heptahydrate, disodium ethylene diamine tetraacetate, an auxiliary agent and the like. The auxiliary agent is prepared from carboxymethyl chitosan, a modified nano auxiliary agent and polyethylene glycol, and the modified nano auxiliary agent is prepared from amylopectin, 8-hydroxyquinolone and isopropyl tri (dioctyl pyrophosphate acyloxy) titanate through a reaction. By adopting a double-chelation technology and a nanotechnology, the stability of trace elements in the fertilizer is remarkably improved, and nutrients are prevented from being lost and fixed in soil. And the absorption efficiency of the plants on elements such as iron, zinc and magnesium is improved by the nano-scale particles and the chelated nutrients. Field tests show that the fertilizer can significantly promote the growth of mung bean sprouts and improve the biomass and the content of medium trace elements in plants.

The invention relates to the technical field of agriculture, and discloses a preparation process of a soil conditioner. The soil conditioner is prepared from the following raw materials in parts by weight: 30 to 50 parts of plant ash, 30 to 50 parts of peanut shell, 15 to 25 parts of coconut shell, 15 to 25 parts of composite enhancer, 3 to 6 parts of ammonium sulfate, 10 to 20 parts of calcium alginate, 8 to 15 parts of urea, 12 to 18 parts of modified cellulose, 5 to 8 parts of polyethyleneimine and 30 to 50 parts of deionized water. Specifically, plant ash, peanut shells, coconut shells and other biomass are used as main materials, various auxiliaries are added, and the capacities of water retention, breathability, fertility increasing and the like of the soil are comprehensively improved; the composite reinforcing agent improves the water-retaining property and the air permeability of the soil and has the effect of balancing the pH value of the soil; the modified cellulose can improve the water-retaining property of the soil by utilizing the strong water absorption effect and reduce nutrient loss, so that the soil fertility is improved.

The invention discloses a formula and a preparation process of a synthetic biotechnology-based endowed netting loss-control pesticide fertilizer, and relates to the technical field of fertilizers, the loss-control pesticide fertilizer is prepared from the following components by weight: 60-80 parts of a compound fertilizer, 10-20 parts of diammonium phosphate, 2-10 parts of trace elements, 2-8 parts of modified attapulgite, 1-4 parts of an insecticide, 0.5-3 parts of polyglutamic acid, and 1-5 parts of polyvinyl alcohol; according to the invention, a high-efficiency netting loss control system is formed through the energization of polyglutamic acid and the synergistic effect of multiple components, so that not only are the problems of easy nutrient loss and poor pesticide stability in the traditional pesticide fertilizer solved, but also the synergistic slow release of nutrients and pesticide is realized, the utilization rate of the fertilizer is remarkably increased, the control period of the pesticide is remarkably prolonged, and the application value is good.

The invention discloses a composting method for promoting livestock and poultry manure aerobic compost decomposition. The composting method is specifically implemented according to the following steps: step 1, preparing a compost additive; step 2, preparing a conditioner; step 3, adding the conditioner prepared in the step 2 into livestock and poultry manure, and uniformly mixing to prepare a compost raw material mixture; and 4, adding the compost additive prepared in the step 1 into the compost raw material mixture treated in the step 3, and fermenting in a compost reactor until the compost is thoroughly decomposed. The problems that in the prior art, nutrient loss is too fast, and the decomposition degree is low are solved.

The invention relates to the technical field of agricultural fertilizers, and discloses an environment-friendly organic slow-release fertilizer and a preparation method thereof, the environment-friendly organic slow-release fertilizer comprises the following raw materials by mass: 55-65% of a decomposed straw carrier; 20%-30% of a slow release carrier; 8%-12% of a microencapsulated bacterial agent; 3%-5% of a cross-linking agent; and 2%-4% of an auxiliary additive. The porosity of the decomposed straw carrier is larger than or equal to 65%, the carbon nitrogen ratio is (25-28): 1, the particle size is 0.5-1.5 mm, and the water holding capacity is larger than or equal to 2.5 g / g. The environment-responsive supramolecular slow-release system is constructed, supramolecular host-guest interaction and temperature-responsive polymer synergism are utilized, the fertilizer release rate can be dynamically regulated and controlled along with the crop rhizosphere temperature, nitrogen can be accurately released in the crop fertilizer demand peak period, the matching degree of a nitrogen release curve and crop demand is increased to 90% or above, and the nitrogen release rate is increased to 90% or above. Compared with the traditional organic fertilizer with the problems of uncontrolled nutrient release, excessive nutrient loss in the early stage and insufficient supply in the later stage, the fertilizer realizes the high conformity of nutrient release and crop requirements.

The invention discloses a bagasse filter mud composting method based on synergistic interaction of sargassum fusiforme and a complex microbial inoculant. The method comprises the following steps: mixing a sugar manufacturing byproduct bagasse and filter mud according to a certain dry weight ratio, and adjusting the moisture and carbon nitrogen ratio; synchronously adding sargassum fusiforme powder and a compound microbial agent, wherein the microbial agent is prepared by compounding bacillus licheniformis and phanerochaete chrysosporium; the high-temperature period is maintained for not less than 7 days, the total fermentation period is about 45 days, and the matured compost and the fertilizer thereof are prepared. The sargassum fusiforme is used as a natural conditioner, so that the composition of nutrient substances can be optimized, nitrogen and water are preserved, and heavy metals are passivated; and the lignocellulose is specifically degraded by the complex microbial inoculants. Through the synergistic effect of the bagasse and the filter mud, the high-temperature period of the compost is remarkably prolonged, the nutrient loss is reduced, the decomposition degree and the environmental safety of a compost product are improved, and an efficient and environment-friendly new way is provided for high-value resource utilization of the bagasse and the filter mud.

The invention relates to the technical field of food processing, in particular to marinating soup for sauce-marinated chub, the sauce-marinated chub prepared from the marinating soup and a preparation method of the sauce-marinated chub. According to the preparation method of the novel marinating soup for the sauce-stewed chub, the fishy smell of the chub can be better removed by the marinating soup prepared by the method, and the quality of the sauce-stewed chub can be improved. Based on the marinated soup prepared by the method, the invention provides the preparation method of the sauce-marinated chub, and the sauce-marinated chub prepared by the method has the advantages of obviously reduced fishy smell, better delicate flavor, rich marinated taste, better overall smell, moderate hardness, chewiness, good chewiness, compact fish block structure and better appearance and color. Moreover, the method can reduce nutrient loss of fish meat and formation of potential harmful substances, the content of volatile basic nitrogen is obviously lower than that of a conventional marinating method, and the eating quality of the sauce-marinated chub can be effectively improved.

The invention discloses a quaternary synergistic water-soluble fertilizer synergist as well as a preparation method and application thereof, and realizes deep coupling of chemical growth promotion, biological activation and physical slow release, multi-component synergistic interaction and efficient nutrient utilization based on a four-dimensional synergistic mechanism of chitosan oligosaccharide-oligopeptide-bioactive alkali-functional microbial agent. Wherein the modified chitosan oligosaccharide enhances the chelating ability through molecular structure optimization, and forms a nano-scale composite system with the oligopeptide, so that the absorption and transfer efficiency of nutrients on leaf surfaces and root systems is remarkably improved. The functional microbial agent and chitosan oligosaccharide cooperate to activate soil enzyme activity and promote release of insoluble phosphorus and potassium, so that the utilization rate of nitrogen, phosphorus and potassium is remarkably increased compared with that of a traditional fertilizer, and nutrient loss is effectively reduced. The quaternary synergistic water-soluble fertilizer synergist provided by the invention is high in compatibility, can be directly compounded with a commercially available water-soluble fertilizer for use, is suitable for diversified planting scenes of facility agriculture, field crops and commercial crops, and has large-scale popularization potential.

The invention relates to the technical field of fertilizers, in particular to a preparation method of a chelated medium element preparation for a synergistic liquid fertilizer. The technical problems that a chelating agent is high in cost, poor in stability and low in bioavailability are solved. The efficient chelating agent is prepared by efficiently extracting or converting a polysaccharide-polyphenol compound and a small peptide mixture with unique chelating performance from specific agricultural or industrial wastes and mixing the polysaccharide-polyphenol compound and the small peptide mixture. Then, a chelating-wrapping dual-stabilization technology is adopted, specifically, a high-efficiency chelating agent and medium element ions are subjected to a chelating effect, and then modified chitosan is added to wrap the chelate, so that nutrient loss is reduced, and nutrient elements are released more evenly. The chelated medium element preparation remarkably improves the stability and effectiveness of nutrient elements through the synergistic effect of double stabilization mechanisms.

The invention belongs to the technical field of fruit freeze-drying processing, and particularly relates to a comprehensive fruit freeze-drying processing method capable of reducing nutrient loss of fruits, which comprises the following steps: S1, immersing sliced fruit slices into a composite color fixative, and simultaneously applying ultrasonic and pulsed electric field treatment on the composite color fixative system containing the fruit slices under the conditions that the ultrasonic power is 200-300W, the pulsed electric field intensity is 15-25kV / cm, and the ultrasonic power is 200-300W and the pulsed electric field intensity is 15-25kV / cm; the co-processing time is 2-4 minutes, so as to obtain the color-protected and strengthened fruit slices; s2, sequentially carrying out three-stage magnetic field freezing treatment on the color-protected and strengthened fruit slices to obtain frozen fruit slices; s3, dynamically adjusting parameters of the frozen fruit slices by adopting an AI algorithm, and performing vacuum freeze-drying in stages to obtain primary freeze-dried fruit slices; s4, placing the primary freeze-dried fruit slices in a vacuum environment to obtain deeply dried fruit slices; and S5, soaking the deeply dried fruit slices in an aqueous solution containing 0.5-1% of amyloid-like protein, 0.2-0.4% of sodium alginate and 0.1-0.3% of cellulose nanocrystals for 1-2 minutes to form a composite protective film with the thickness of 1-3 microns, so as to obtain the coated fruit slices.

The invention discloses a sandy soil conditioner and application thereof. The sandy soil conditioner is prepared from the following raw materials in parts by mass: 1 to 5 parts of sodium carboxymethyl cellulose, 100 to 126 parts of biochar, 15 to 30 parts of humic acid and 0.5 to 1.5 parts of microbial agent. The microbial agent is prepared from bacillus subtilis and penicillium baylii according to the mass ratio of (1 to 3): (0.5 to 1.5). According to the invention, sodium carboxymethyl cellulose, biochar, humic acid and a specific microbial agent are scientifically proportioned, the addition of biochar significantly enhances the water and fertilizer retention ability of soil, the porous structure effectively adsorbs and retains a large amount of water and nutrients, the nutrient loss is reduced, and the soil fertility is improved; the humic acid is rich in organic matters and various nutrient elements, so that the organic matter content of the soil is effectively increased, the soil structure is improved, a stable granular structure is formed, and the air permeability and the water-retaining property of the soil are enhanced; sodium carboxymethyl cellulose is used as a soil conditioner, so that the agglomeration and the stability of the soil are further enhanced.

The invention discloses selenium-loaded composite biochar (SeBC) with high efficiency, nutrient increasing and emission reduction and application of the selenium-loaded composite biochar (SeBC) in invasive biological compost. The preparation method comprises the following steps: by taking invasive animal ampullaria gigas shells as raw materials, preparing pyrolytic biochar (BC) by adopting a pyrolysis method, then carrying out iron modification on the BC to obtain MBC, then proportioning the ampullaria gigas shells BC and MBC to form composite biochar, and loading a selenium element to obtain the selenium-loaded composite biochar. When the SeBC is used for invasive biological composting, on one hand, the defects of long composting period, low maturing efficiency, high nutrient loss and the like in the traditional composting process are overcome; and on the other hand, the invading organisms are subjected to resource utilization, so that the composting process can be improved, the composting quality can be improved, the environmental pollution can be reduced, the pressure of the invading organisms on the ecological environment is relieved, and a new way is provided for resource utilization of the invading organisms and improvement of low-carbon compost.

The invention belongs to the technical field of soil improvement, and particularly relates to a desert soil conditioner and a preparation method thereof.The desert soil conditioner is prepared from, by weight, 70-80% of a core material and 20-30% of a functional additive, the core material comprises 50-60% of biochar and 20-30% of modified bentonite, and the functional additive comprises 20-30% of modified bentonite; the functional auxiliary agent comprises 10-15% of a slow-release fertilizer, 5-10% of a microbial agent, 3-5% of a water-retaining agent and 2-3% of a soil conditioner. According to the desert soil conditioner and the preparation method thereof, the slow-release fertilizer is arranged, and nitrogen, phosphorus and potassium nutrients are wrapped by a composite material film prepared from 50% of cellulose and 50% of polylactic acid by adopting a coating technology, so that the slow-release fertilizer is not easy to damage in the mixing process, and the film can be degraded by microorganisms in the natural environment; therefore, the effect of slowly releasing nutrients is achieved, the fertilizer utilization rate is improved, and nutrient loss is avoided.

This invention discloses a reconstituted rice made from leafy greens and its preparation method. The method involves mixing brown rice flour pretreated with leafy green filtrate with leafy green residue obtained by treatment with sodium hydroxide and alkaline protease. The mixture is then extruded, molded, and air-dried to obtain high-quality, high-nutrient reconstituted rice made from leafy greens. This method solves the problem of nutrient loss in grain raw materials without adding other additives, while synergistically promoting nutrient absorption, improving raw material utilization and nutrient absorption efficiency, and enhancing the nutritional value of the reconstituted rice.