272 results about "Nitrogen fertilizer" patented technology

The invention relates to the technical field of precision agriculture and grape cultivation, and discloses a vineyard fertilization method based on unmanned aerial vehicle multi-source remote sensing data, and the method comprises the steps: obtaining a canopy multi-spectral image and three-dimensional structure data through an unmanned aerial vehicle; carrying out image preprocessing and finely extracting a grape canopy region; fusing the extracted spectral vegetation index, texture features and three-dimensional structure features, and constructing a multi-source feature vector; constructing and optimizing a nitrogen nutrition inversion model through a machine learning algorithm by utilizing actually measured nitrogen nutrition parameters; generating a nitrogen content distribution diagram based on a model inversion result, calculating the nitrogen deficiency amount and the recommended dressing pure nitrogen amount of each space unit in combination with critical nitrogen concentration diagnosis and target yield, and converting the nitrogen deficiency amount and the recommended dressing pure nitrogen amount into the use amount of a foliage spraying working solution; and generating a variable fertilization prescription map, and converting the variable fertilization prescription map into a nozzle flow control instruction executable by the unmanned aerial vehicle to realize on-demand accurate variable fertilization. According to the invention, closed-loop management from nitrogen nutrition monitoring to variable rate fertilization is realized, and the nitrogen fertilizer utilization efficiency and the fertilization accuracy are improved.

The invention provides a rice variable rate fertilization method and device, electronic equipment and a storage medium, and relates to the technical field of agricultural intelligent information process.The method comprises the steps that non-rice plant interferents in a multispectral remote sensing image are removed, and a rice plant canopy mask is generated; based on the rice plant canopy mask, multi-dimensional features of the rice plant canopy are extracted and fused, and a fused growth feature vector is obtained; grading the rice growth vigor according to the fused growth vigor feature vector through a growth vigor grade prediction model to obtain a predicted growth vigor grade; performing standardization processing on the predicted growth vigor level to obtain a standardized growth vigor level; determining a nitrogen fertilizer adjustment factor based on the standardized growth vigor grade; and according to the nitrogen fertilizer adjustment factor, adjusting a standard nitrogen application amount to obtain a recommended nitrogen application amount. According to the invention, accurate recommendation of the nitrogen application amount in the rice planting process can be realized, so that accurate fertilization is realized.

The invention discloses a preparation method of an ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer, and relates to a preparation method of a urea slow-release fertilizer. The invention aims to solve the problems that the existing nitrogen fertilizer is low in utilization rate and easy to absorb moisture and cake, a polyurethane coating material is non-degradable, and pure ethyl cellulose is insufficient in mechanical strength and limited in water resistance and is not beneficial to being used as a coating matrix of the fertilizer. The method comprises the following steps: 1, preparing an ethyl cellulose cross-linked isocyanate enveloping solution; and 2, preparing the ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer. According to the preparation method, etherified derivative ethyl cellulose of cellulose is taken as a raw material, and the defects that a pure ethyl cellulose membrane is insufficient in mechanical strength, limited in water resistance and low in nutrient separation control precision are overcome by utilizing isocyanate crosslinking modification. The prepared slow-release fertilizer has the advantages of being simple in process, low in cost, environmentally friendly, degradable in matrix, capable of effectively preventing urea from absorbing moisture and caking and the like, and is suitable for large-scale preparation and used in agricultural production.

The present disclosure provides non-intergeneric remodeled microbes that are able to fix atmostpheric nitrogen and deliver such to plants in a targeted, efficient, and environmentally sustainable manner. The utilization of the taught microbial products will enable farmers to realize more productive and predictable crop yields without the nutrient degradation, leaching, or toxic runoff associated with traditional synthetically derived nitrogen fertilizer. The remodeled microbes taught herein are able to be combined with leading agricultural chemistry and elite germplasm. Furthermore, the disclosure provides seed treatments comprising remodeled microbes.

The invention relates to the field of data analysis, in particular to a controlled-release nitrogen fertilizer application decision optimization method in combination with soil water content change characteristics, and the method comprises the following steps: obtaining an effective infiltration potential energy optimization factor through field water capacity threshold truncation of a soil volume water content sequence and effective infiltration potential energy time window accumulation difference evaluation; obtaining a water potential lag direction optimization factor through first-order difference gradient direction consistency and trend amplitude gating coupling evaluation of the soil volume moisture content sequence; the DTW local distance is corrected through the effective infiltration potential energy optimization factor and the water potential lag direction optimization factor; and performing release curve weighted prediction on the optimal matching historical sequence corresponding to the optimized DTW distance to obtain an accurate controlled-release nitrogen fertilizer application decision suggestion so as to solve the problems of historical scene matching distortion and controlled-release nitrogen fertilizer application decision deviation caused by neglecting of an effective cumulative effect and a water potential hysteresis effect in the existing Euclidean distance measurement.

The invention discloses a fertilizing method for cold resistance and yield increase of heading lettuce, and belongs to the technical field of functional water-soluble fertilizers. The method comprises the following steps: applying a bio-organic fertilizer and a ternary compound fertilizer as a base fertilizer in a planting period; topdressing a water-soluble fertilizer A composed of a liquid nitrogen fertilizer and a cold-resistant functional peptide bacterial fertilizer through drip irrigation in the early rosette stage; topdressing a water-soluble fertilizer B consisting of a high-potassium drip irrigation water flush fertilizer and a cold-resistant functional peptide bacterial fertilizer in the later stage of the rosette stage; topdressing high-potassium drip irrigation and water flush fertilizer at the initial stage of the heading stage. On the basis of a water and fertilizer integrated system, the cold-resistant functional peptide bacterial fertilizer is precisely applied in stages, the liquid nitrogen fertilizer and the high-potassium water-soluble fertilizer are optimized, the synergistic effect of peptide substances, functional microorganisms and nutrient elements is fully played, the cold resistance of the heading lettuce is remarkably enhanced, nitrogen is reduced by 15%-20%, the yield is increased by 40%-50%, the income is increased by 1200-1300 yuan per mu, and the yield is increased by 100-200 yuan per mu. And the method has important popularization and application values.

The application discloses a kind of compound fertilizer with nitrogen fertilizer slow-release and biocontrol function and preparation method, it is related to microbial compound fertilizer field, including the following components: nitrogen source carrier, physical net trapping material, 3,4-dimethyl pyrazole phosphate, biocontrol component, binder.A kind of preparation method, including the following steps: after silanization modification treatment is carried out to attapulgite, with polyglutamic acid aqueous solution mixed reaction, obtain self-assembly gel;Bacillus subtilis is embedded and handled, rhamnolipid is pre-emulsified, chitosan oligosaccharide is crosslinked with boric acid treatment, and is blended;Nitrogen source carrier is heated to melt, add self-assembly gel, mix evenly;Temperature control, add 3,4-dimethyl pyrazole phosphate, and keep warm reaction;Cooling, add the blend obtained in step S200, binder, mix evenly;Extrusion granulation, after fluidized bed drying, slow-release coating is carried out, and the target compound fertilizer is obtained.The application makes disease control efficiency to improve to 89.2%, and blocks nitrosomonas AMO enzyme activity for 120 days.

The invention provides an application of a nitrification inhibitor and biochar as a soil conditioner in enhancing drought resistance of plants, a preparation method of the biochar is as follows: moso bamboo stalks are taken as raw materials, pyrolysis is performed for 4-8 hours under an anoxic state of 250-400 DEG C, soil is red soil, and the plant is polygonatum cyrtonema, and an application method comprises the following steps: adding a nitrogen fertilizer into the soil, the addition amount of the nitrification inhibitor is 1% of the content of nitrogen added to the soil, and the addition amount of the biochar is 3% of the mass of the soil. Through combined application of the biochar and the dicyandiamide, the drought resistance of the polygonatum cyrtonema and the benefits of soil microbial communities are remarkably improved.

This invention discloses a simplified method for orchard ground cover, mulching, and mechanized precision sowing and fertilization, comprising: dividing the orchard ground into inter-row work zones and tree basin protection zones; using a seed-fertilizer co-sowing device to create strip-shaped furrows in the inter-row work zones, forming deep trenches and shallow sowing zones; applying controlled-release fertilizer to the deep trenches and sowing complementary mixed grass seeds in the shallow sowing zones; when the height of the composite surface vegetation community reaches the preset mowing height, performing mowing operations and transferring the mowed herbaceous biomass to the tree basin protection zone to form a mulch layer; measuring the mass of the herbaceous biomass transferred to the tree basin protection zone, calculating the nitrogen supplementation amount according to a preset nutrient compensation coefficient, and applying liquid nitrogen fertilizer to the inter-row work zones and tree basin protection zones. This invention enables integrated and coordinated management of orchard ground cover, sowing, fertilization, mulching, and nitrogen supplementation, improving the orchard's year-round ground cover capacity and mechanized operation efficiency.

The application discloses an agricultural water quality and water quantity dual risk and cascade transmission evaluation method, belongs to the technical field of water resource management, and aims at solving the problem that traditional methods only stay in water quantity depletion caused water resource pressure accounting and ignore the risk caused by substandard water quality; the application comprises the following steps: based on a farmland soil nitrogen budget and hydrodynamics coupling model, quantifying the pollution emission list of subdivided sources in the growth process of specific crops, simulating agricultural pollution dilution water consumption; using a crop water requirement model to calculate the irrigation water consumption of specific crops in the whole growth period; using a source and sink corrected physical flow trade model to analyze the virtual water transfer path hidden in each agricultural product trade link; integrating the production end and the consumption end results to realize high-precision grid agricultural water resource supply and demand imbalance risk evaluation and cascade effect analysis; and the cascade transmission effect of the application in evaluating the water resource risk provides strong support for reasonable allocation of agricultural water resources and improvement of nitrogen fertilizer utilization efficiency.

The invention discloses an automatic crop nitrogen fertilizer accurate management method based on a remote sensing image, and relates to the technical field of accurate fertilization, the method comprises the following steps: obtaining ground measured data containing overground biomass and plant nitrogen concentration in a key growth period, and establishing a nitrogen dilution curve model through nonlinear least square fitting; uAV multispectral images are collected synchronously, a vegetation index matrix is calculated, a machine learning regression model is trained in combination with ground data, and an inversion model of overground biomass and plant nitrogen accumulation is obtained; acquiring a current-season image before topdressing, and performing pixel-by-pixel inversion to generate a biomass and nitrogen accumulation spatial distribution diagram; and calculating a critical nitrogen accumulation amount according to the nitrogen dilution curve so as to obtain a nitrogen nutrition index, calculating a recommended topdressing amount in combination with a preset basic topdressing amount and a nitrogen fertilizer utilization rate, and outputting a prescription map which can be directly imported into a variable fertilization machine. The method belongs to localized modeling and machine prescription map generation, the technical threshold is lowered, the nitrogen fertilizer utilization rate is increased, and environmental pollution is reduced.

This invention belongs to the field of microbial technology, specifically relating to a compound microbial fertilizer that synergistically regulates rhizosphere flora and nitrogen metabolism genes and its application. The microbial agent includes: Bacillus belye (… Bacillus velezensis ), Bacillus subtilis subsp. subtilis ( Bacillus subtilis subsp. subtilis ) and Linyi Streptomyces ( Streptomyces linyiensis Two or three of the following. The microbial agent provided by this invention has significant growth-promoting and nitrogen-fixing effects when applied to crops. It can maintain or even improve soil fertility and crop yield under the condition of reducing nitrogen fertilizer application by 30%, providing a green and efficient new solution for the implementation of "nitrogen reduction and efficiency enhancement".

The invention belongs to the field of rice fertilization, and discloses a simple and efficient one-time rice fertilization method based on soil available potassium level, which comprises the following steps: measuring the available potassium content of plough layer soil of a target field; selecting a slow mixed fertilizer according to the content of available potassium in plough layer soil: when the content of available potassium is lower than 150mg / kg, selecting a high-potassium-ratio slow mixed fertilizer with the mass percent of K2O not lower than 10%; and when the content of available potassium is higher than or equal to 150mg / kg, selecting a low-potassium-ratio slow-mixing fertilizer with the mass percent of K2O being lower than 10%. Through precise matching of soil potassium with a slow-mixing fertilizer formula and combination of one-time basal application, fine soil preparation, precise ear fertilizer diagnosis and other technologies, synchronous supply of nutrients in the whole growth period of rice is realized, the fertilization frequency is remarkably reduced, the nitrogen fertilizer utilization rate and yield are improved, and the method has the advantages of labor saving, high efficiency and environmental protection.

The invention relates to a tea tree nitrogen nutrition diagnosis method based on unmanned aerial vehicle multi-source remote sensing. The method comprises the following steps: S1, setting a gradient nitrogen application experiment; s2, collecting tea tree shoot samples, and measuring biomass and nitrogen content data of overground parts; collecting and preprocessing tea tree canopy remote sensing data; s3, constructing a critical nitrogen dilution curve, and calculating to obtain a nitrogen nutrition index NNI; s4, constructing a multi-source fusion feature set; s5, performing feature optimization selection on the multi-source remote sensing fusion feature set; s6, taking the optimal subset in S5 as input, taking the NNI in S3 as output, training an NNI estimation model by utilizing a machine learning algorithm, and selecting and determining an optimal estimation model through model precision; s7, performing inversion and spatial mapping on the tea garden NNI, and performing nitrogen nutrition status diagnosis according to the NNI value; and S8, topdressing the nitrogen fertilizer in a flat cabinet for the diagnosed nitrogen-deficient area. The method can realize large-area, lossless and rapid diagnosis of the nitrogen condition of the tea garden, guide variable fertilization, save fertilizer and increase yield, and has remarkable environmental protection benefits.

This invention discloses a wheat-specific fertilizer suitable for rice-wheat rotation and its preparation method, comprising the following steps: mixing equal volumes of carboxymethyl chitosan solution, composite biochar dispersion, and agar solution, then adding sodium tripolyphosphate solution dropwise, stirring, allowing to stand, dialyzing, and freeze-drying to obtain hydrogel particles; swelling the hydrogel particles in a mixed aqueous solution of urea and superphosphate, filtering, and vacuum drying to obtain the wheat-specific fertilizer suitable for rice-wheat rotation; this invention uses a coating material to coat composite biochar powder, nitrogen fertilizer, and phosphate fertilizer, and improves the utilization rate of nitrogen and phosphate fertilizer through the slow-release effect of the coating material; by adsorbing fixed trace metal elements through the coating material, the slightly acidic state of the phosphate fertilizer during dissolution is used to convert the adsorbed fixed trace metal elements into a free state, and then titanium aluminum carbide promotes the movement of the free trace metal elements, thereby promoting the absorption and utilization of trace metal elements by wheat roots and improving wheat yield and quality.

This invention discloses a core-shell structured slow-release microbial fertilizer for grapes and its preparation method, belonging to the field of microbial slow-release fertilizer technology. The invention prepares three-layer core-shell structured microbial fertilizer granules, consisting of a microbial core layer, a nutrient layer, and a shell layer, from the inside out. The microbial core layer contains a complex microbial community, modified γ-polyglutamic acid, and trehalose; the nutrient layer is compounded with fast-acting nitrogen, phosphorus, and potassium fertilizers, and slow-release nitrogen fertilizer; the shell layer uses a composite system of modified γ-polyglutamic acid, nano-montmorillonite, and grape pomace biochar. This invention constructs an ion barrier through dual modification of γ-polyglutamic acid with phosphate groups and amino groups, improving the survival rate of the microbial strain and its rhizosphere colonization ability. Simultaneously, utilizing the protonation characteristics of amino groups at pH, a positive feedback loop of rhizosphere microenvironment-responsive fertilizer release is constructed. Combined with nano-montmorillonite and grape pomace biochar, the granule's mechanical strength and slow-release performance are enhanced, soil structure is improved, and the resource recycling of grape processing waste is achieved.

The invention discloses a method for recovering vegetation of a mildly-degraded Coilin grassland. The method comprises the following steps: S1, investigating plant community characteristics and biomass; s2, determining the quality of the forage grass in the plant community; s3, collecting a soil sample; s4, reseeding: grass seeds are reseeded on the mildly degraded Coilin grassland, the reseeded grass seeds are agropyron perennioides and adsura adsura, and the mass ratio of the agropyron perennioides to the adsura adsura is (6-8): (2.5-3.5); the reseeding amount is 10-20 kg / hm < 2 >; s5, fertilization: applying a fertilizer bag, the fertilizer bag being a nitrogen-phosphorus-potassium mixed fertilizer, the nitrogen-phosphorus-potassium mixed fertilizer comprising a nitrogen fertilizer, a phosphorus fertilizer and a potash fertilizer, according to the plant community conditions of the mildly degraded Coilsein grassland, through reseeding and reasonable fertilization, the monoennial and biennial plants, perennial gramineae, hybrid grass and perennial leguminous plants of the Coilsein grassland can all grow, the yield of the Coilsein grassland is increased, and the yield of the Coilsein grassland is increased. And the pH value of the soil tends to be neutral, so that the mildly degraded Coilin grassland vegetation is recovered.

The invention belongs to the technical field of microorganisms, and particularly relates to a composite microbial fertilizer capable of cooperatively regulating rhizosphere flora and nitrogen metabolism genes and application of the composite microbial fertilizer, and the microbial agent comprises two or three of bacillus velezensis, bacillus subtilis subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. Subsp. When the microbial agent provided by the invention is applied to crops, the microbial agent has remarkable growth promotion and nitrogen fixation synergistic effects, can maintain and even improve soil fertility and crop yield under the condition of reducing application of a nitrogen fertilizer by 30%, and provides a green and efficient new solution for implementation of nitrogen reduction and synergistic effects.

The application discloses a method for promoting the absorption of methane in sheep grassland, and belongs to the field of environmental protection.The method is achieved by the following steps: applying nitrogen fertilizer to artificial sheep grassland in the growing season (June-September) to promote the absorption of methane in the grassland, so as to achieve the purpose of methane emission reduction.The nitrogen fertilizer added in the method is ammonium nitrate, the adding frequency is once a month, and the total dose is 100 kg N / hm 2 . Through the method, the total absorption amount of methane in the grassland in the growing season and the next spring freeze-thaw period is increased by more than 140% compared with the natural condition. The method is simple to operate and low in cost, and is helpful to the realization of the low-carbon target in the management process of artificial sheep grassland. In particular, in the next spring freeze-thaw period, the average value of the nitrogen application group is 7.1 mg m ‑2 , the average value of the nitrogen-free group is-5.0 mg m ‑2 , and the nitrogen application treatment increases the cumulative absorption amount of CH4 in the grassland soil in the spring freeze-thaw period by 240.4%.

The invention discloses a water-soluble slow-release fertilizer containing nutrient signal substances and a preparation method of the water-soluble slow-release fertilizer, and belongs to the technical field of controlled-release fertilizer production. The terminator containing the crop nutrient demand signal substance is designed and prepared and then is grafted with hydroxymethyl urea, and a low-molecular-weight hydroxymethyl urea water-soluble slow-release nitrogen fertilizer and a medium / high-molecular-weight complete-element fertilizer are generated through reaction, so that the molecular weight control of the two fertilizers and the combination of the fertilizer and the crop demand fertilizer are realized. The water-soluble and slow-release fertilizer can be cooperated, the release of fertilizer nutrients can be matched with the fertilizer requirement rule of crops, meanwhile, a novel product scheme with higher adaptability is provided for large-scale popularization of a water and fertilizer integration technology, and the water-soluble and slow-release fertilizer has remarkable application value for promoting water and fertilizer saving in agricultural production and improving the utilization efficiency of crop nutrients.

The invention provides a rice planthopper prevention and control method based on nitrogen fertilizer application, and belongs to the technical field of agricultural planting. According to the method, nitrogenous fertilizer application and rice planthopper prevention and control are combined, and the synergistic interaction of high rice yield and pest control is achieved. The method specifically comprises the four key steps of base fertilizer application, tillering stage regulation and control, accurate nitrogen supply in the heading stage and fertilizer supplementation in the filling stage, nitrogen, phosphorus and potassium fertilizers are reasonably distributed in all the steps, a plant source repellent is compositely added when the heading fertilizer is applied, and meanwhile scientific water management and leaf surface spraying technologies are matched. Through staged precise regulation and control of the nitrogen fertilizer and multi-technology cooperation, the rice planthopper prevention and control effect can be larger than or equal to 70%, the chemical pesticide application amount is reduced by 40% or above, and the method is suitable for various rice planting modes and has remarkable economic benefits and ecological benefits.

The present disclosure provides a nitrogen-iron compound fertilizer, belonging to the technical field of crop fertilization, which is composed of nitrogen fertilizer and chelate iron fertilizer. The present disclosure also provides a method for crop fertilization, comprising: during the growth of crops, spraying the nitrogen-iron compound fertilizer in the form of an aqueous solution to the leaf surface of the crops, the spraying frequency being 2-3 times, and the interval time being 5-7 days, and the production management being normal crop planting field management, wherein the nitrogen-iron compound fertilizer is composed of nitrogen fertilizer and chelate iron fertilizer. By using the nitrogen-iron compound fertilizer and the method for crop fertilization provided by the present disclosure, the nitrogen-iron compound fertilizer is sprayed to the leaf surface of the crops during the growth of the crops, the tillering and the absorption and utilization of nitrogen and iron elements of the plants in the tillering stage are enhanced, thereby effectively improving the yield and nitrogen utilization rate of the crops. Among them, the response of the OsNLP4 overexpression rice to the spraying of the nitrogen-iron compound fertilizer on the leaf surface is stronger, and the yield and the nitrogen utilization rate are both significantly increased.

This invention discloses a high-calcium suspension fertilizer, its preparation method, and its application, relating to the field of fertilizer production technology. By weight, it comprises 20-30 parts of macro-element fertilizer, 10-15 parts of medium-element fertilizer, 3-5 parts of micro-element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water. The macro-element fertilizer consists of 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphorus fertilizer, and 15-20 parts of potassium fertilizer. The medium-element fertilizer is modified nano-calcium carbonate and magnesium carbonate. The micro-element fertilizer consists of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate. Through this method, nano-calcium carbonate can be rapidly absorbed by plants, enabling timely replenishment of calcium ions during plant growth and accelerating plant growth.

Disclosed herein is a strain of Bacillus infantis deposited under number CECT 30759. Also, a microbial composition and process for the preparation thereof. Particularly, a microbial composition based on Bacillus infantis strain used as plant growth promotion bacteria (PGPB), more specifically as a biological fixing nitrogen. In addition, the present invention discloses a method for reducing the total amount of nitrogen fertilizer required by crop.

The invention discloses an ecological garden engineering soil preparation device, and relates to the technical field of soil preparation devices.The ecological garden engineering soil preparation device comprises a connecting frame, a grass root turning-out assembly is arranged at the left end of the bottom of the connecting frame, a grass root smashing assembly is arranged at the right end of the bottom of the connecting frame, and a soil rotary tillage assembly is arranged on the right side of the bottom of the grass root smashing assembly; a nitrogen fertilizer adding assembly is arranged in the grass root smashing assembly, and a mixture deep burying assembly is arranged at the bottom of the right side of the grass root smashing assembly and comprises a blocking plate fixedly arranged at the bottom of the right side of the U-shaped mounting frame. A mixture is extruded and output through a pushing column, the mixture can be buried in the deep position of soil while blockage is avoided, then the speed of rotting grass roots into organic fertilizer is effectively increased, in addition, nitrogen consumed during rotting of the grass roots can be compensated through addition of urea, and the fertilizer utilization rate is increased. And poor crop growth caused by nitrogen grabbing during rotting of grass roots is avoided while the rotting speed is further increased.

The application discloses application of a rice OsARF24 gene. The nucleotide sequence of the OsARF24 gene has an accession number of LOC4352211 in Genbank. The rice OsARF24 gene is a key element in an auxin signal pathway. Knocking out the OsARF1 can cause the expression amount of nitrogen metabolism related genes of the rice, the nitrate nitrogen absorption rate, the plant height and the yield of the rice to be reduced, and the nitrogen fertilizer utilization efficiency to be reduced in a comprehensive manner. The function of the OsARF24 gene in positively regulating the nitrogen fertilizer utilization efficiency of the rice is clarified, and a technical route for increasing the nitrogen fertilizer utilization efficiency of the rice by increasing the expression of the OsARF24 in the rice is provided.

The application discloses a method suitable for reducing N2O emission of straw returned to field in medium-weak acidic soil, and relates to the technical field of environmental protection. The medium-weak acidic soil is the straw full amount smashing and burying returned to field soil, and after pre-culturing the medium-weak acidic soil, nitrogen fertilizer and inhibitor are added into the pre-cultured medium-weak acidic soil in sequence, and after culturing, the N2O emission of the medium-weak acidic soil is reduced. The inhibitor is compounded by 3,4-dimethyl pyrazole phosphate and nano carbon solution. The 3,4-dimethyl pyrazole phosphate and the nano carbon solution have a synergistic effect on reducing the total amount of N2O emission in the medium-weak acidic soil. Specifically, compared with the blank treatment group, the N2O emission amount of the inhibitor prepared by combining the 3,4-dimethyl pyrazole phosphate and the nano carbon solution is reduced by 0.422 kg·hm ‑2 .

This invention discloses a salt-tolerant Cladosporium 550W1 strain and its application in promoting nodulation and nitrogen fixation in leguminous plants, belonging to the field of microbial technology. The salt-tolerant Cladosporium (… Cladosporium halotolerans Cladosporium 550W1, deposited at the China General Microbiological Culture Collection Center (CGMCC) with accession number CGMCC No. 41943, provides a salt-tolerant Cladosporium 550W1 that can significantly promote nodulation and nitrogen fixation in legumes, increase plant biomass and nitrogen accumulation, and reduce dependence on chemical nitrogen fertilizers. It has broad application prospects and environmental and ecological benefits.

The invention relates to the technical field of agricultural resources and environment, in particular to a fertilization method for reducing nitrogen loss of an apple orchard. The apple branch biochar is prepared from the apple orchard pruning waste, and resource utilization of the waste is achieved. Through the synergistic effect of the apple branch charcoal, dicyandiamide and the reduced nitrogen fertilizer, the loss of nitrate nitrogen in soil is obviously slowed down, the conversion of ammonium nitrogen is inhibited, and a nitrogen cycle functional microflora is regulated, so that the application amount of the nitrogen fertilizer is reduced, the utilization rate of the nitrogen fertilizer is improved, and the environmental pollution is reduced; the growth of apple plants can be obviously promoted, the root configuration is improved, and the root activity and the nitrate reductase activity are improved.