22 results about "Paddy soils" patented technology

The invention relates to the field of soil nutrient management, in particular to a rice soil nutrient coordinated regulation and control method and system based on big data analysis, and the method comprises the steps: firstly, collecting data through a multi-source sensing array, and constructing a feature state space with time sequence memory; a physical field theory is introduced, and the buffer effect of soil on nutrients is modeled into a chemical potential energy field by utilizing a variety Hooke's law, so that the system instability is quantified, and the problem of excessive fertilization caused by a hysteresis effect is solved. In the aspect of control decision, rolling horizon optimization is adopted, the potential energy burden serves as a penalty term to be introduced into a genetic algorithm, and blind topdressing under model mismatch is prevented by adaptively correcting and searching a spatial constraint boundary through a predicted residual error of a previous period. And finally, a smoothing instruction is generated through low-pass filtering, and accurate and steady regulation and control of rice soil nutrients are realized.

The invention belongs to the technical field of rice cultivation and soil improvement, and particularly relates to a fertilization method for acid rice field soil improvement and application thereof. According to the method, an organic fertilizer is used for replacing 25% of conventional formula fertilizer (formula fertilizer containing nitrogen, phosphorus and potassium), and medium trace elements of magnesium, boron and zinc are applied in a combined manner; or medium trace elements such as magnesium, boron and zinc are additionally applied on the basis of application of a conventional formula fertilizer, and quick lime is added, so that the problem of aggravated soil acidification caused by application of a single chemical fertilizer is relieved, the rice yield is increased, meanwhile, the content of exchangeable acid in soil is reduced, and the total amount of exchangeable salt-based ions in the soil and the effective state content of elements are increased, thereby increasing the pH of the soil and improving the yield of the rice. The acid resistance of the soil is enhanced, and the acid soil is effectively improved.

The present application belongs to the technical field of soil environment regulation, and particularly relates to a paddy soil carbon fixation and emission reduction regulation method based on a ferrihydrite-organic matter complex. The ferrihydrite-organic matter complex is prepared through coprecipitation, the mineral combination degree of organic carbon in soil is improved, and the biological availability thereof is reduced, so as to alleviate the process of organic carbon decomposition and greenhouse gas emission mediated by microorganisms. Under the condition of redox fluctuation, the complex can maintain good structural stability, slow down the process of iron reduction and dissolution and the process of organic carbon release accompanying the same. In addition, the ferrihydrite as an electron acceptor can participate in the electron competition process under anaerobic conditions, so as to inhibit the production of methane to a certain extent. Therefore, the ferrihydrite-organic matter complex can realize the synergistic regulation of organic carbon stabilization and greenhouse gas emission reduction in paddy soil.

This invention relates to the field of agricultural environment and soil fertilizer technology, and in particular to a method for increasing paddy field yield and reducing N2O emissions by regulating the application rate of zero-valent iron. The method includes the following steps: at the early tillering stage of rice, zero-valent iron is mixed with tillering fertilizer and applied to the paddy field soil; the application rate of zero-valent iron is 20-50 mg / kg (dry soil basis). ‑1 The method involves applying booting fertilizer to the paddy soil during the early booting stage of rice, and irrigating throughout the entire rice growth cycle. This invention, by applying an appropriate amount of zero-valent iron in a single application on top of conventional fertilizer application, can synergistically achieve greenhouse gas emission reduction and increased grain yield, providing a feasible path for green production in paddy fields.

The invention belongs to the technical field of soil improvement, and discloses a soil conditioner with an acidified soil improving function and a preparation method thereof. The conditioner is prepared from biomass charcoal, peat containing humic acid, crab shells, eggshells, clamshells, bamboo charcoal, zeolite powder, kieselguhr, biogas residues, potassium fulvate, calcium magnesium phosphate fertilizer, animal waste and a microbial agent according to the mass percent. The invention relates to the technical field of soil improvement. The modifier realizes a multi-dimensional synergistic effect through alkaline neutralization, humus buffering, slow-release fertilizer supply and microbial activation, can significantly improve the pH value of acidified rice field soil after one-time application, increases 0.6-1.0 unit, effectively increases the contents of soil organic matters, total nitrogen, available phosphorus and available potassium, improves the soil structure and microbial activity, and improves the soil quality. And the yield of rice is increased by about 10% or above. The method is suitable for soil improvement and green agricultural production of southern acidic rice fields.

The application relates to a driving rack simulating a paddy field soil tiller, which can adjust the deviation angles of driving impellers in all directions and can adjust the deviation angles of the driving impellers according to certain rules. The driving rack comprises a simulation groove, a driving mechanism and a walking mechanism. One end of a universal coupling is connected with the central shaft of the driving impeller, and the other end is connected with the output shaft of the transmission mechanism, so that the torque transmission between the transmission mechanism and the driving impeller under different angles can be realized. The angle adjusting mechanism comprises an adjusting sleeve sleeved on the central shaft and at least two telescopic adjusting mechanisms arranged in the circumferential direction of the adjusting sleeve. One end of the telescopic adjusting mechanism is spherically connected with the outer circumferential surface of the adjusting sleeve, and the other end is spherically connected with a fixed body. The telescopic adjusting mechanism comprises a driving module and a telescopic arm. The included angle between any two telescopic adjusting mechanisms is greater than 0 DEG and smaller than 180 DEG. The position adjustment of the adjusting sleeve in the plane perpendicular to the central shaft is realized through the telescopic cooperation of the telescopic adjusting mechanisms.

The invention discloses a nano zeolite coupled biomass charcoal-based slow release fertilizer suitable for acidic rice soil, a preparation method and application, and aims to solve the problems of low pH value, high methane emission flux, low nutrient utilization rate and the like of the acidic rice soil. By constructing a nano zeolite-biomass charcoal-slow release fertilizer-silicon fertilizer synergistic regulation system, the stability of organic carbon in soil and the slow release capacity of nutrients are improved by utilizing a composite material formed by embedding nano zeolite into pores of biomass charcoal; the alkalinity and physiological functions of the silicon fertilizer are used for improving the soil pH and the oxygen secreting capacity of the rice root system, and cooperative emission reduction is achieved through the two paths of inhibiting methane generation and promoting methane oxidation. Field test results show that the pH value of acidic rice soil can be increased by 0.5-1.5 units in a rice growing season, the accumulated emission of methane is reduced by 27%-40%, and the rice yield is increased by 12%-20%. The invention has the advantages of easily available raw materials, simple process, good operability and the like, and can realize the synergistic effect of acid soil improvement, carbon sequestration and emission reduction and crop yield and efficiency increase.

The application discloses a fertilizer additive combination for improving red paddy soil aggregate and potassium availability and a method for applying the same, and belongs to the technical field of soil improvement and fertilization. The application realizes the improvement of the physicochemical properties of soil by compounding the fertilizer with functional additives and applying the fertilizer in layers and steps. The application has the characteristics of stable improvement effect, wide application range, simple operation, low cost and the like, and is suitable for the comprehensive improvement and sustainable utilization of the physicochemical properties of red paddy soil.

This invention discloses a method for improving tropical acidic soil based on deep tillage and synergistic use of alkaline materials, belonging to the field of agricultural soil improvement technology. This method targets strongly acidic paddy soils or dryland soils with an initial pH ≤ 5.0, and includes: deep tillage to a depth of 35-45 cm at a soil moisture content of 15%-20%, with complete return of crushed straw to the field; uniform application of a compound conditioner on the surface, consisting of: 80-120 kg / mu of quicklime, 80-120 kg / mu of biomass ash, and 150-250 kg / mu of calcium-magnesium soil conditioner, wherein the biomass ash is a byproduct of a biomass power plant, and the pH value is 9-10 under a water-to-soil ratio of 1:2.5; and rotary tillage to ensure that the coefficient of variation of the material distribution within the 0-20 cm soil layer is ≤ 12%. This invention utilizes deep tillage and the synergistic effect of three materials in a specific ratio to form a three-level buffer system of "rapid-release-long-lasting effect," achieving rapid improvement and long-term stability of soil pH. It solves the problems of soil compaction and short-lasting effect caused by the application of lime alone, while effectively alleviating deep acidification. It is particularly suitable for strongly acidic paddy soils or dryland soils with an initial pH ≤ 5.0.

The invention belongs to the technical field of soil nitrogen fixation and environmental protection, and relates to a method for enhancing soil nitrogen fixation by using pure iron powder. A method for enhancing soil nitrogen fixation by using pure iron powder comprises the following steps: mixing rice soil and wheat straw powder to obtain a soil sample; the method comprises the following steps: mixing a soil sample with pure iron powder under a waterflooding condition; pure iron powder is added to regulate and control microbial ecology of rice soil biological nitrogen fixation, the soil iron reduction process is enhanced, the abundance of iron reducing bacteria in soil is improved, the relative contribution of iron reducing bacteria nitrogen fixation is enhanced to a certain extent, the diversity of iron reducing bacteria communities is reduced, the ecological niches of dominant groups are enhanced, and the ecological niches of the dominant groups are increased. Finally, the nitrogenase activity of the soil is enhanced, and the nitrogen fixation capacity of the rice soil is improved.

The present application relates to the field of soil improvement, and discloses a method and system for improving the soil texture structure of clay reclamation paddy soil, comprising: obtaining aeolian sand and organic material, respectively performing material pretreatment to obtain qualified aeolian sand and qualified organic material; performing ploughing and loosening treatment on the soil of a target area to obtain clean soil after ploughing and loosening treatment; mixing the qualified aeolian sand, the qualified organic material and the clean soil to obtain mixed soil, and performing permeability evaluation and optimization on the mixed soil to obtain qualified mixed soil; laying a ploughed bottom layer on the qualified mixed soil, repeatedly performing flooding-drying cycle treatment on the ploughed bottom layer, and then laying a ploughing layer on the qualified mixed soil, and performing flatness adjustment and flatness optimization on the ploughing layer to realize improvement of the soil texture structure.The present application can effectively improve the structure of reclamation paddy soil, improve the soil permeability and fertility, and provide a good soil environment for the growth of rice.

The invention belongs to the technical field of microbial agents for soil improvement, and particularly relates to application of a microbial agent for promoting carbon immobilization of a red soil rice field. The microbial inoculum is rhodococcus erythropolis or a synthetic microbial inoculum of rhodococcus erythropolis and pseudomonas aeruginosa, and after the rice seedlings are transplanted to red soil for 3 days, 25mL of suspension liquid of the related microbial inoculum is inoculated to the rhizosphere of each rice seedling. According to the application, the rhizosphere microenvironment is improved, input of plant photosynthetic carbon into soil is activated, meanwhile, the carbon utilization efficiency and conversion capacity of soil in-situ microbial communities are remarkably improved, accumulation of microbial source carbon is promoted, the molecular composition structure of soluble organic matter is remodeled, and finally formation and accumulation of a soil carbon library are promoted and stabilized.

This invention belongs to the field of pesticide technology, and more specifically relates to a pesticide composition for controlling soil-borne diseases of rice and its preparation method. The pesticide composition of this invention exhibits excellent control effects against rice bakanae disease, damping-off, and sheath blight, with a long-lasting effect, meeting the control needs throughout the entire rice growth cycle. Simultaneously, the introduction of an ecological regulator adjusts the soil pH to a suitable range, promoting the reproduction of beneficial microorganisms, which not only reduces the amount of chemical pesticides used but also significantly increases rice yield and reduces the risk of pesticide residues.

This invention belongs to the field of agricultural biotechnology and fertilizer preparation technology, and more specifically relates to a compound fertilizer for the prevention and control of soil-borne diseases in rice and its preparation method. The compound fertilizer for the prevention and control of soil-borne diseases in rice provided by this invention has a four-layer gradient structure, consisting of a core, a middle layer, an isolation transition layer, and an outer layer from the inside out. The core includes urea, potassium dihydrogen phosphate, potassium chloride, potassium silicate, and chitosan oligosaccharides; the middle layer is a drug-loaded biochar slow-release layer; the isolation transition layer is formed by cross-linking sodium alginate and phytic acid; and the outer layer is a microbial protective layer. Through the core-shell-membrane multi-layer gradient structure design, physical isolation and sequential release of each component are achieved. The isolation transition layer effectively blocks direct contact between chemical fungicides and beneficial microorganisms, solving the problem of fungicide-microorganism interaction; at the same time, this structure ensures the orderly release of nutrients, fungicides, and microorganisms, matching the growth and disease occurrence patterns of rice.

The invention relates to the field of coastal agriculture, in particular to shrimp shell fermentation liquor and a preparation method thereof. The preparation method comprises the following steps: drying fresh shrimp shells to obtain dried shrimp shells; based on the total volume of the culture medium, inoculating trichoderma fermentation strains into the fermentation culture medium for culturing; fermentation seed liquid is obtained; and mixing the dried shrimp shells without sterilization with the fermentation seed solution, sealing, and then fermenting. According to the technical scheme, the trichoderma harzianum is used for fermenting the shrimp shells, and the shrimp shell fermentation liquor is prepared from the unsterilized shrimp shells and multiple strains of the trichoderma harzianum in a synergistic manner, so that the degradation rate of the shrimp shells is optimal. When the shrimp shell fermentation liquor is applied to rice, the contents of rapidly available phosphorus, rapidly available potassium and organic matters in rice soil are increased, and the content of alkali-hydrolyzable nitrogen is remarkably increased, so that the growth of plant height, stem diameter, stem leaves and root systems of the rice is promoted.

The present application relates to the field of soil nutrient management, in particular to a rice soil nutrient synergistic regulation method and system based on big data analysis, first, data is collected through a multi-source sensing array, and a characteristic state space with time sequence memory is constructed. By introducing physical field theory, the buffer effect of soil on nutrients is modeled as a chemical potential energy field using the variable Hook's law to quantify system instability and solve the problem of excessive fertilization caused by hysteresis effect. In the control decision, the rolling time domain optimization is adopted, the potential energy burden is introduced into the genetic algorithm as a penalty term, and the search space constraint boundary is adaptively corrected through the prediction residual of the last period to prevent blind topdressing under model mismatch. Finally, a smooth instruction is generated through low-pass filtering to realize accurate and stable regulation of rice soil nutrients.

This invention provides a biological method for activating organic phosphorus in gleyed paddy soil, belonging to the field of soil improvement technology. The biological method involves introducing green algae into the paddy field after the rice seedlings have turned green, artificially cultivating a periclump biological community. This community utilizes the photosynthetic oxygen release from the periclump to increase the soil's redox potential and soil microbial activity, accelerating organic matter mineralization. Simultaneously, the method introduces phosphate-solubilizing bacteria into the paddy field after the rice enters the tillering stage, increasing the abundance and activity of phosphate-solubilizing bacteria in the soil. These bacteria then produce phosphatases, further accelerating organic phosphorus mineralization. The biological method provided by this invention effectively increases the abundance and activity of phosphate-solubilizing bacteria in gleyed paddy soil, thereby increasing the available phosphorus content in the soil.

The application discloses a rice film mulching transplanting device and method, relates to the technical field of rice transplanting, and solves the problem that the rice film mulching transplanting device is inconvenient to use and difficult to adjust the number of rice seedlings according to the size of a rice field, thereby reducing the rice seedling efficiency. The rice film mulching transplanting device and method comprise a vehicle frame, a plurality of rice storage mechanisms are movably arranged on one side of the vehicle frame, a rice transplanting mechanism is movably arranged on the outer side of each of the rice storage mechanisms, a turning mechanism is movably arranged on the two sides of the rice transplanting mechanism, and a film laying mechanism is movably arranged on the outer side of the rice transplanting mechanism. The film laying mechanism is arranged, the plastic film on the surface of a film laying roller can be laid on the ground through the rolling of the film laying roller, the device can realize automatic rice seedling and film mulching, and the loss of water in the soil of the rice is reduced.

The present application relates to the field of agricultural data analysis, and more particularly to a kind of intelligent evaluation method for dynamic carbon-nitrogen ratio of japonica rice paddy field soil, the method comprises: by collecting and preprocessing the time series data of japonica rice paddy field environment, obtain the standardized environmental data set;By nonlinear congestion analysis on soil moisture content state, obtain the corrected water dimension distance component;By evaluating the metabolic permission of soil moisture on temperature effect, obtain the corrected temperature dimension distance component;By double-weighted fusion on water and temperature correction distance component, obtain the soil environment state clustering result;By coupling calculation on soil environment state clustering result and first-order kinetics decomposition model, obtain the intelligent evaluation result of dynamic carbon-nitrogen ratio of japonica rice paddy field soil, so as to solve the problem that existing clustering cannot accurately distinguish aerobic and anaerobic environment state in japonica rice paddy field scene and lead to deviation of soil carbon-nitrogen ratio evaluation result.

The application discloses a method for reducing rice antimony accumulation by using exogenous soluble organic matter, and relates to the field of agricultural environment remediation, and comprises the following steps: S1, selecting at least one of livestock and poultry manure source organic material or crop straw source organic material as raw material, adding ultrapure water according to a solid-liquid ratio of 1:5-1:20, oscillating and extracting for 12-48 hours under the condition of 15-35 DEG C, taking supernatant by centrifugation, filtering through a 0.45 mu m microporous filter membrane, and obtaining a filter solution as an exogenous soluble organic matter solution; S2, applying the exogenous soluble organic matter solution into antimony-polluted paddy soil, and the application amount of the exogenous soluble organic matter is 0.01%-0.5% of soil dry weight in terms of dissolved organic carbon; and S3, maintaining a waterlogged layer of 1-5 cm in the field during the whole growth period of rice, and draining and drying the field before harvesting. The application realizes green remediation of antimony-polluted paddy fields and safe production of rice by using agricultural waste resource products.

This invention discloses a CFD-DEM coupled modeling and verification method for paddy field soil based on JKR surface energy calibration. The steps include: initially estimating the range of JKR surface energy parameters between soil particles through soil tilt angle tests, and then accurately determining the optimal JKR surface energy value from the range of JKR surface energy parameters by combining soil firmness tests; establishing a two-way coupled soil CFD-DEM model based on EDEM discrete element software and Fluent fluid dynamics software; simulating the weeding wheel cutting process and the direct shearing process of the soil using the two-way coupled soil CFD-DEM model; and evaluating the accuracy of the model based on the average relative error and static shear stress error. This CFD-DEM coupled modeling and verification method for paddy field soil solves the key bottleneck in modeling high-moisture-content cohesive paddy field soil, achieves high-precision prediction, and provides a highly reliable technical means for the accurate simulation of agricultural machinery-soil interaction processes.

The application relates to a kind of intelligent shooting equipment of rice disease and insect pest, wherein limiting mechanism includes lower limiting assembly and upper limiting assembly, lower limiting assembly includes lower limiting inductive switch and lower limiting magnet ring, lower limiting inductive switch is installed below camera mechanism, lower limiting magnet ring is movably sleeved on the shell, and lower limiting magnet ring is close to insertion part, lower limiting assembly is used to limit lower limiting magnet ring to move upward along the first direction, to avoid water in rice soil from seeping into camera mechanism;Upper limiting assembly includes upper limiting inductive switch and upper limiting magnet piece, upper limiting inductive switch is installed above camera mechanism, upper limiting magnet piece is arranged on the shell and located above lower limiting magnet ring, upper limiting assembly is used to limit camera mechanism to move, so that camera mechanism stops moving. Because of the setting of limiting mechanism, camera mechanism can take pictures before the specified lowest point and highest point, without manual intervention, more flexible and convenient to use.