744 results about "Nitrogen fertilizer" patented technology

The present disclosure provides non-intergeneric remodeled microbes that are able to fix atmospheric 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 fertilizers, in particular to a stable fertilizer for preventing and treating peanut root rot and a preparation method thereof, and the fertilizer comprises a fertilizer inner core layer, a nano microbial metabolite layer and a microbial protective layer from inside to outside. According to the stable fertilizer for preventing and treating peanut rhizome rot, the capsule embedding inhibitor made of humic acid and the trichoderma aureoviride metabolite are adopted to construct a dual nitrification inhibition system, and the capsule embedding inhibitor and the trichoderma aureoviride metabolite have a synergistic effect, so that the nitrification effect is reduced, the nitrogen fertilizer utilization rate is increased, and non-point source pollution is reduced.

The invention discloses a crop nitrogen fertilizer management system and method based on multi-agent reinforcement learning, and belongs to the technical field of intelligent agriculture. Comprising the following steps: collecting and preprocessing multi-source data of a target area, calibrating a crop growth-nitrogen cycle model based on the multi-source data, and constructing a dynamic simulation environment; constructing a nitrogen fertilizer application strategy model and a multi-target award function, and performing agent reinforcement learning training by adopting a centralized training-decentralized execution architecture; introducing a large language model, and updating a strategy network and / or a value network of each agent in a training process according to a reward adjustment signal and a decision constraint; when the index fluctuation ratio in the continuous evaluation period is smaller than a preset threshold value, it is judged that the nitrogen fertilizer application strategy model is converged, and an optimal nitrogen fertilizer application strategy model is obtained; and generating a nitrogen fertilizer application scheme based on the optimal nitrogen fertilizer application strategy model in combination with the real-time state data, and generating a natural language interpretation and risk assessment report based on a large language model.

The present disclosure provides non-intergeneric remodeled microbes that are able to fix atmospheric 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, by mitigating or eliminating the need for exogenous nitrogen-containing fertilizers. The remodeled microbes have unique colonization and nitrogen fixation abilities, which enable the microbes to deliver nitrogen to a cereal plant in a spatially targeted (e.g. rhizospheric) and temporally targeted (e.g. during advantageous stages of plants life cycle) manner. The microbes are able to replace the standard agricultural practice of sidedressing and enable a more environmentally sustainable form of farming. The present disclosure also provides methods of using non-intergeneric remodeled microbes, for example, to fix atmospheric nitrogen by reducing or eliminating the need for exogenous nitrogen-containing fertilizers, to increase yield, and to reduce infield variability in the yield.

The invention relates to the technical field of leymus chinensis planting, in particular to a method for planting leymus chinensis in a salinized sand land, which is used for interplanting mousse winterplant in an oat land. The row spacing is 80 cm, the sowing depth is 1-1.5 cm, the sowing amount is 0.5 kg / mu, sowing is carried out in line, and 27.8 kg / mu urea (N is greater than or equal to 46%) is applied as a base fertilizer. Timely irrigation. The fertilizer is applied once in spring every year. A test nitrogen fertilizer is urea (N > = 46%), a phosphate fertilizer is triple superphosphate (P2O5 > = 44%), a potash fertilizer is potassium sulfate (K2O > = 52%), and timely irrigation is carried out. According to the invention, not only is a proper fertilizer combination provided, but also the growth, development and asexual reproduction capabilities of leymus chinensis are greatly improved. The planting effect of leymus chinensis can be effectively improved, the yield and quality of leymus chinensis are improved, and good practicability is achieved. Meanwhile, the formula is economical and reasonable, and is easy to popularize and apply.

The invention relates to the field of agricultural fertilizer and soil improvement, in particular to a biochar-based slow release fertilizer for improving acidified soil and a preparation method thereof.The biochar-based slow release fertilizer is prepared from, by mass, 60 parts of a biochar system, 5-12 parts of nitrogen fertilizer, 10-18 parts of phosphate fertilizer, 5-12 parts of potash fertilizer, 5-10 parts of an acid soil modifier and 2-5 parts of a slow release film; graded release of nutrients is achieved through a multi-aperture biochar system, the release rhythm is dynamically adjusted according to soil acidity in combination with a three-layer pH response type slow-release film, the problems that existing fertilizer nutrient release is not matched with crop requirements, and the persistence of acidified soil improvement is poor are solved, the pH and buffer capacity of acidified soil can be improved, the nutrient utilization rate is increased, and the soil quality is improved. And most of the raw materials are agricultural and forestry wastes and industrial byproducts, so that the soil conditioner meets agricultural requirements, is suitable for acidified soil, and has a wide application prospect.

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 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 discloses a key gene identification method related to tobacco nitrogen response, which comprises the following steps: S1, setting four nitrogen fertilizer gradient treatments on the basis of same phosphorus and potassium fertilization by adopting a field experiment of a completely random block; s2, randomly taking the 6th to 8th leaves of the five plants in each area, and dividing a sample into two parts: quickly freezing one part with liquid nitrogen, and storing at-80 DEG C for RNA (Ribonucleic Acid) extraction and transcriptome sequencing; one part is used for measuring the nitrogen content, and after baking and drying treatment, a KjeltecTM8100 automatic nitrogen analyzer is used for measuring; s3, nitrogen content determination: determining the nitrogen content in the treated sample by using an automatic nitrogen analyzer KjeltecTM8100; according to the method, high-throughput transcriptome sequencing and weighted gene co-expression network analysis (WGCNA) are combined, so that not only can gene expression maps of flue-cured tobacco leaves treated by different nitrogen fertilizers be comprehensively captured, but also gene modules with similar expression modes can be mined from a global perspective.

The invention relates to the technical field of soil fertilization, in particular to a plain area dry farmland thick and fertile plough layer construction and productivity improvement method which comprises the following steps: in the first year, after corn is harvested, smashing straws, turning and burying the straws and returning the straws to the field, and in the next year, performing soil preparation and sowing by adopting flat-planting wide-narrow-row planting or ridge-planting uniform-row planting; in the second year, after the corn is harvested, the whole straw or smashed straw covers and returns to the field, straw row-collecting no-tillage sowing is carried out in the next year, and flat-cropping wide-narrow row planting is adopted for sowing; in the third year, after the corn is harvested, the whole straw or smashed straw covers and returns to the field, straw row-collecting no-tillage sowing is carried out in the next year, and flat-cropping wide-narrow row planting is adopted for sowing. Through the implementation of the technical method, the thickness of a plough layer of the dry farmland in the plain area is increased by 13-15 cm, the nitrogen fertilizer utilization rate is increased by 10%-15%, and the soil fertility level is increased by 0.5-1 grade.

The invention discloses a method for detecting the nitrogen content of organ tissues of different varieties of oilseed rapes based on visible near-infrared spectroscopy, which comprises the following steps: firstly, collecting oilseed rape leaf, shell, stalk and root system samples under the conditions of multiple varieties and multiple nitrogen fertilizer levels, and acquiring spectral data within the range of 430-2500nm by using a visible near-infrared spectroscopy; and a Kjeldahl method is synchronously adopted to measure the real nitrogen content as a reference value. Preprocessing the spectral data, including de-noising, standard normal variable transformation, multivariate scatter correction and derivative processing, so as to weaken the influence of scattering and baseline drift; characteristic wavelengths related to the nitrogen content are screened through stepwise regression, variable projection importance, competitive self-adaptive reweighted sampling, a continuous projection algorithm and other methods, and a random forest model, a support vector machine model, a partial least squares discriminant analysis model, a partial least squares regression model, a support vector regression model, an XGBoost model and other models are combined. And respectively constructing a classification identification model and a regression prediction model.

The invention discloses a special controlled-release nitrogen fertilizer for rice containing a nitrogen signal substance and application of the special controlled-release nitrogen fertilizer. The special controlled-release nitrogen fertilizer containing the nitrogen signal substance for the rice sequentially comprises nitrogen fertilizer particles, a signal substance layer and a coating layer from inside to outside, the nitrogen fertilizer particles are quick-acting nitrogen fertilizer; the signal substance layer is a phenolic acid-beta-cyclodextrin inclusion compound; the preparation method comprises the following steps: completely dissolving beta-cyclodextrin in distilled water, heating, slowly dropwise adding an ethanol solution containing phenolic acid, a chelating agent and an antioxidant while stirring, and reacting to obtain the phenolic acid-beta-cyclodextrin inclusion compound. And the coating layer is prepared from bio-based polyol and isocyanate. According to the invention, phenolic acid is used as a signal substance, beta-cyclodextrin is added to include phenolic acid, and an antioxidant and a chelating agent are added to coat the surface of urea to prepare nitrogen fertilizer particles; and coating a coating material to obtain the special controlled-release nitrogen fertilizer containing the nitrogen signal substance for the rice. The controlled-release fertilizer not only can accurately release the nitrogen fertilizer and reduce the waste of the nitrogen fertilizer, but also can improve the yield and quality of the rice and reduce common diseases of the rice.

The invention discloses a novel bradyrhizobium strain SBM1 as well as a preparation and application thereof, and belongs to the technical field of microorganisms. The novel bradyrhizobium strain SBM1 disclosed by the invention is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.29121. The strain has good tolerance to herbicides, bactericides and insecticides, and is high in nodulation and nitrogen fixation capacity, wide in symbiotic spectrum and remarkable in nitrogen-saving and high-yield-promoting capacity. Under the field planting condition that the application amount of nitrogen fertilizer is reduced by 50%, the strain can remarkably improve the nitrogen fixation and growth performance of crops, so that a strain source is provided for obtaining a rhizobium inoculant suitable for planting various varieties of peanuts, the application amount of the nitrogen fertilizer is reduced, normal implementation of crop pesticides is guaranteed, and the economic benefit is increased. The important significance is realized on the increase of the crop yield.

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 invention discloses a method for synergistically improving soil carbon sequestration yield and efficiency by using a modified carbon material, and belongs to the technical field of agriculture. The method comprises the following steps: applying a modified carbon material and a soil conditioner into soil at the same time before cultivation; the preparation method of the modified carbon material comprises the following steps: pre-treating plant straws, gypsum and attapulgite tailings, uniformly mixing, drying, carrying out high-temperature pyrolysis carbonization, cooling and granulating, thereby obtaining the modified carbon material. Through one-time large-scale application of the modified carbon material and the soil conditioner and combination of precise application of the field nitrogen fertilizer, the effects of soil recarburization and quality improvement and crop yield and efficiency increase can be rapidly achieved, the synergistic effect of plough layer reservoir expansion and recarburization and capacity expansion is achieved, the soil structure and quality are remarkably improved, the productivity of the soil is improved, and the method is suitable for large-scale popularization and application. The negative influence of agricultural production on the ecological environment is further reduced, and the sustainable and healthy development of cultivated land is promoted.

The invention discloses a method for realizing pollution reduction and carbon reduction by phosphogypsum recycling. The method comprises the following steps: (1) washing phosphogypsum with water to remove soluble impurities, neutralizing residual acid, and calcining and activating; (2) pretreatment of the landfill leachate: magnesium salt and phosphate are added, the pH of the landfill leachate is adjusted, and free ammonia NH3 is released through low-temperature heating; (3) the pretreated landfill leachate is sprayed to capture CO2 in the flue gas, and a (NH4) 2CO3 solution is obtained; (4) fully mixing a (NH4) 2CO3 solution with the pretreated ardealite, and controlling the reaction conditions in a closed reactor, so that the ardealite and (NH4) 2CO3 are subjected to a heterogeneous reaction to generate CaCO3 and (NH4) 2SO4; and (5) product purification: carrying out solid-liquid separation on the mixed solution by adopting a multi-stage crystallization process to obtain a building material, and carrying out gradient cooling and recrystallization purification on the filtrate to obtain the nitrogen fertilizer. According to the method, recycling of the landfill leachate and the ardealite is achieved, and CO2 in the flue gas is efficiently removed.

The invention discloses a lolium perenne seedling returning nitrogen reduction amount regulation and control method based on soil multifunctional evaluation, and relates to the technical field of agricultural planting.According to the method, a closed-loop dynamic regulation and control system is constructed, aiming at the soil characteristic difference after lolium perenne seedlings are returned to the field, precise and personalized management of the application amount of nitrogen fertilizer is achieved, and the application amount of nitrogen fertilizer is improved. According to the method, the nitrogen fertilizer compensation amount is dynamically adjusted according to the soil multifunctionality real-time evaluation result of the key growth stage of crops, and the yield fluctuation caused by blind reduction of application is effectively avoided, so that the stability and improvement of the crop yield are ensured while the chemical nitrogen fertilizer input is remarkably reduced, and the economic benefit is increased. The technical scheme that physical, chemical and biological indexes of soil are comprehensively evaluated in the key growth stage of crops, and the nitrogen fertilizer correction amount is dynamically calculated based on the deviation between the evaluation result and the target function range is adopted, so that the accurate regulation and control of the nitrogen fertilizer application amount can be realized; therefore, the stable yield of crops is guaranteed and the soil health level is continuously improved while the application of chemical nitrogen fertilizer is reduced.

The invention provides a microorganism synergistic nitrogen fixation fertilizer based on flavone induction and a preparation method thereof, and belongs to the technical field of agricultural fertilizers. The fertilizer induces the formation of an azotobacter biofilm through a flavonoid compound, promotes the colonization and nitrogen fixation of rhizosphere azotobacter, improves the nitrogen supply capability of soil, and reduces the dependence on chemical nitrogen fertilizer. The fertilizer comprises the following components: 5-15% of a flavone extract, 3-8% of an azotobacter, 20-30% of an organic carrier, 30-40% of an inorganic nutrient medium and 5-15% of a filler. The preparation method comprises the following steps: mixing the organic carrier and the inorganic nutrient substrate, adding the filling agent, granulating, adding the nitrogen-fixing bacterial agent and the flavone extract to form a composite liquid, spraying the composite liquid, drying and packaging. Compared with the prior art, the fertilizer disclosed by the invention has the advantages of remarkably improving the nitrogen fixation efficiency, reducing the use of chemical nitrogen fertilizer, enhancing the slow release performance, improving the fertilizer utilization rate, improving the soil ecological environment and promoting the healthy growth of plants. The method is simple, efficient and suitable for large-scale production and application.

The invention relates to the technical field of water-soluble fertilizers, in particular to a water-soluble organic fertilizer and a preparation method and application thereof.The water-soluble organic fertilizer is prepared from, by mass, 40-100 parts of basic organic raw materials, 5-15 parts of microbial fermentation additives, 10-20 parts of nutrient element supplements and 3-7 parts of synergists; the microbial fermentation additive comprises a compound microbial agent and a microbial growth carrier, the nutrient element supplement comprises a nitrogenous fertilizer, a phosphatic fertilizer, a potash fertilizer and medium trace elements, and the synergist comprises fulvic acid and alginic acid. According to the water-soluble organic fertilizer and the preparation method and application thereof, efficient utilization and accurate supply of nutrients are achieved, the growth requirements of crops in plant factories are met, meanwhile, resource utilization of organic waste is promoted, and sustainable development of the plant factories is promoted.

The invention discloses a special microbial fertilizer for cotton and a preparation method thereof, and belongs to the technical field of microbial fertilizers. The fertilizer is prepared from the following raw materials in parts by weight: 40-60 parts of a microbial agent, 80-100 parts of a microbial agent carrier, 40-60 parts of a nitrogen fertilizer, 30-50 parts of a phosphate fertilizer, 20-30 parts of a potassium fertilizer and 10-20 parts of a stabilizer, the microbial agent is prepared from nitrogen-fixing paenibacillus mucilaginosus MSSW01, bacillus nissi and streptomyces widermomole, and the microbial agent is prepared from bacillus mucilaginosus MSSW01 and streptomyces widermomole. The stabilizer is prepared from roxburgh rose extract, soybean protein isolate and gamma-aminobutyric acid according to the mass ratio of 2: 1: (0.2-0.5). By screening and optimizing three beneficial microbial strains and combining the synergistic effect of raw material components in a specific ratio, the yield and quality improvement of cotton can be remarkably promoted, and meanwhile, the occurrence rate of common diseases of cotton is effectively reduced.

The invention discloses a method for increasing the yield of ratooning rice, and relates to a fine field management technology. In the whole process from sowing to harvesting, the method comprises the steps that nitrogenous fertilizer, phosphate fertilizer and potash fertilizer are applied in the specific growth stage, shallow water layer irrigation is kept, and water management is conducted immediately after first season rice is harvested so as to promote growth in the regeneration season. In addition, the method further comprises the steps of exogenous spraying of a plant growth regulator in the key growth period and unified management of diseases and pests. According to the technical scheme, the yield and stability of ratooning rice are improved by optimizing fertilization, irrigation and use of a plant growth regulator, and meanwhile environment safety and crop quality are guaranteed.

The present disclosure provides non-intergeneric remodeled microbes that are able to fix atmospheric 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 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 discloses a water-retention synergistic coated slow-release fertilizer and a preparation method thereof, and relates to the technical field of water-retention slow-release fertilizers. The coated slow-release fertilizer sequentially comprises a fertilizer core, an inhibitor layer, a slow-release coating layer, a bonding layer and a water-retaining slow-release layer from inside to outside. Wherein the inhibitor layer is composed of a urease / nitrification inhibitor, the slow-release coating layer is composed of organic polymer resin, the bonding layer is composed of an ethyl cellulose binder, and the water-retaining slow-release layer is composed of a modified water-retaining agent. The coated slow-release fertilizer prepared by the invention has good water retention performance, controlled release performance and salt resistance, is suitable for high-salt soil, and can obviously improve the nitrogen fertilizer utilization rate. Meanwhile, the combination of polyglutamic acid and sulfonic acid groups is used for modifying polyacrylic acid to prepare the modified water-retaining agent, so that a synergistic effect on improving the salt resistance of the coated slow-release fertilizer is achieved, the fertilizer efficiency can be improved, the loss is reduced, the soil environment is improved, and the water-retaining capacity of soil and the utilization rate of the fertilizer are improved.

The invention belongs to the technical field of fertilizers, and particularly relates to magnesium-containing controlled-release urea and a preparation method thereof, and the magnesium-containing controlled-release urea is characterized in that magnesium or magnesium-boron, magnesium-zinc and magnesium-boron-zinc medium trace element combinations are added into large-particle urea, and then coating is carried out. According to the controlled-release urea, elements such as magnesium are added into molten urine, then roller granulation and cooling are carried out, and finally coating is carried out. According to the prepared product, urea, magnesium and other elements can be synchronously and slowly released for a long time, nitrogen, magnesium and other nutrients have synergistic benefits, the utilization rate of nitrogen fertilizer, magnesium and other elements can be further increased, robust growth of crops is promoted, the yield is increased, the quality is improved, the stress resistance is enhanced, and labor is saved; and the method is especially suitable for regions with relatively common lack of medium trace elements and high-added-value commercial crops, and has a wide practical application value.

The invention relates to the technical field of cotton planting, in particular to a saline-alkali improvement device for dry sowing and wet discharging of cotton, which comprises a first frame body, a second frame body is fixedly mounted on the right side of the first frame body, an auxiliary frame is fixedly mounted at the right end of the bottom of the second frame body, and a positioning pressing wheel and a soil covering plough are respectively arranged at the left end and the right end of the bottom of the auxiliary frame. Through the effect of the improvement device and the improvement method, the problems that the growth situation of cotton seedlings is affected due to the fact that the soil is extremely prone to salt reversion due to the reasons such as many windy days, high temperature and fast water evaporation in cotton planting in arid areas are solved, and planters can grow more easily in order to guarantee the growth of cotton. The problems that soil salinization is aggravated, the salt tolerance of cotton is reduced, ecological restoration and sustainable development of the cotton industry are not facilitated and the like due to excessive spraying of water or abuse of various fertilizers including nitrogen fertilizers exist in the prior art.

The invention discloses a straw returning water-nitrogen synergistic method based on a biochemical inhibitor, and belongs to the technical field of agricultural resources and environments. The straw returning water-nitrogen synergistic method based on the biochemical inhibitor comprises the following steps that in an annona squamosa-soybean interplanting system, a water-nitrogen synergistic agent is added into an annona squamosa-soybean interplanting system; the nitrogen release and straw decomposition process is regulated and controlled through the synergistic effect of the biochemical inhibitor and water management, short-term crop requirements and long-term soil fertilization are both considered, and the water and nitrogen utilization efficiency is improved. According to the invention, a comprehensive strategy of'regulation and control of nitrogen release by a biochemical inhibitor and collaborative management of water and nitrogen 'is adopted. Release of nitrogen fertilizer is delayed through the urease inhibitor, straw decomposition and crop requirements are matched, and short-term nitrogen starvation of soybeans is avoided; generation of nitrate nitrogen is reduced through the nitrification inhibitor, nitrogen leaching and denitrification loss are reduced, and the nitrogen fertilizer utilization rate is increased; the irrigation amount is adjusted according to the straw decomposition stage and the crop growth stage, microbial decomposition is driven, and meanwhile the carbon conversion efficiency is improved.

The invention relates to the field of fertilizers, in particular to a special fertilizer for disease-resistant crops and a preparation method thereof.The special fertilizer comprises a nutrient core, a microbial agent coating and a medium trace element coating from inside to outside; the nutrient core comprises the following components in parts by weight: 35-40 parts of a nitrogen fertilizer, 20-25 parts of a phosphate fertilizer, 15-20 parts of a potassium fertilizer, 3-5 parts of a synergist and 1-1.5 parts of molasses; the microbial agent coating layer comprises 1-2 parts of a liquid microbial solution, 1-2 parts of a microbial protective agent and 3-5 parts of a microbial agent carrier; the medium trace element coating layer comprises 5-10 parts of a medium trace element fertilizer and 0.8-1.6 parts of a coating agent. According to the disease-resistant crop special fertilizer provided by the invention, the medium trace elements are added in an external wrapping manner, so that the condition that the effectiveness of nutritional ingredients is reduced due to chemical reaction between metal cations of the medium trace elements and phosphate ions in a phosphate fertilizer in a fertilizer production process is avoided.

The invention relates to the technical field of microorganisms and particularly discloses paenibacillus mucilaginosus as well as a microbial agent and application thereof. The preservation number of the paenibacillus mucilaginosus N-002 is CGMCC (China General Microbiological Culture Collection Center) No.32752, and the preservation number of the paenibacillus mucilaginosus N-002 is CGMCC No.32752. The paenibacillus mucilaginosus N-002 provided by the invention can produce a urease inhibitor and indoleacetic acid at high yield and has no denitrification effect, the urease inhibitor produced by the paenibacillus mucilaginosus N-002 can reduce the urease activity of soil, significantly reduce the ammonia emission and nitrous oxide emission of the soil, especially after a nitrogen fertilizer is applied, is beneficial to soil nitrogen element maintenance, improves the fertilizer efficiency of the nitrogen fertilizer, and has a good application prospect. Meanwhile, the influence of emission of ammonia and nitrous oxide on the environment is reduced; the strain has no denitrification effect, and can increase the proportion of non-denitrifying bacteria in soil and reduce the denitrification effect of the soil after being applied to the soil, so that the emission of nitrous oxide in the soil is reduced, and environmental protection is facilitated.