58 results about "Cash crop" patented technology

The invention relates to the technical field of intelligent monitoring, and discloses a farmland grain planting condition dynamic monitoring method and system and a storage medium, and the method comprises the steps: obtaining a multi-temporal optical remote sensing image of a target area, and reconstructing the multi-temporal optical remote sensing image to obtain a high-resolution farmland image; performing feature extraction and crop identification on the high-resolution farmland image to obtain a crop type distribution diagram; and performing multi-time comparative analysis on the crop type distribution diagram to obtain cultivated land utilization change data, and generating a cultivated land grain planting condition monitoring report based on the cultivated land utilization change data. Precise distinguishing between grain crops such as rice, wheat and corn and commercial crops is achieved, fine non-grain changes are effectively recognized, and the accuracy of dynamic monitoring of cultivated land and grain planting conditions is 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 ecological restoration and water and soil conservation, and discloses a wind prevention and sand fixation forest restoration method and system based on a forestry and agriculture compound system. The method comprises the following steps: deploying a distributed wind sand environment sensing node array, constructing a local wind field dynamic evolution model, and identifying a potential wind erosion hot spot region; generating a dynamic forest belt adjustment instruction based on the identification result, and controlling the deployment position and density of the movable shrub barrier unit; forestry and agriculture composite planting regulation and control are synchronously implemented, deep-root-system sand-fixing plants are arranged in a core protection zone, herbaceous plants are mixed and sown in a transition zone, and economic crops are crop-rotated in a peripheral zone; and the self-adaptive reconstruction of the forest belt structure is realized by continuously monitoring the change of the sand grain flux and feeding back the parameters of the optimization model. Through dynamic sensing, prediction and intervention mechanisms, the wind prevention and sand fixation efficiency is remarkably improved, ecological restoration and farmers and herdsmen livelihood are considered, the actually measured wind erosion hot spot area is reduced by 68%, and the ground surface sand transport rate is reduced by 82%.

The invention discloses a mountain land low temperature refined monitoring prediction method and system based on satellite-ground fusion and deep learning, and belongs to the technical field of ecological meteorological monitoring and agricultural disaster prevention and reduction. The invention aims to solve the problems of insufficient mountain low-temperature monitoring space coverage, neglect of local factors, rough prediction resolution and poor terrain adaptability in the prior art. The method comprises the steps of multi-source data acquisition, high-density meteorological station, multi-source satellite and meteorological mode data acquisition, spatial-temporal feature analysis, correlation analysis, key variable screening and weather type association, satellite-ground fusion air temperature reconstruction, generation of refined monitoring data based on a CNN-ANN deep learning framework, and short-term and temporary prediction modeling. And LSTM is combined with a terrain attention mechanism to construct a prediction model, and two-dimensional reliability verification is carried out. According to the method, the mountain low-temperature monitoring precision and the predicted terrain adaptability can be improved, accurate support is provided for low-temperature disaster prevention and reduction of mountain economic crops, and the method has remarkable practical value.

The invention relates to the technical field of soil improvement and ecological restoration, and discloses a liquorice planting method based on synergistic utilization of coal-based solid waste and desertified land, which comprises the following steps: crushing alkaline coal-based solid waste and acidic coal-based solid waste, mixing according to a mass ratio of 2: 8-4: 6, adding a modified humic acid-based heavy metal passivator and water, and uniformly mixing to obtain a mixture; uniformly mixing and aging to obtain a coal-based solid waste mixture; spreading the mixture on the surface layer of the desertification land, performing rotary tillage and deep tillage to mix the mixture with the sandy soil, and adjusting the pH value to be stable at 7.5-8.5; the treated liquorice seeds are sown, main roots are harvested in autumn of the third year, deep root systems and lateral root bud points are reserved, and overground straw is smashed and returned to the field; soil nutrition indexes are monitored regularly, other commercial crops are planted when the soil nutrition indexes reach a set threshold value, and if not, regeneration planting of the liquorice is maintained. Through synergistic compounding of acid-base solid waste and chelating of the passivating agent, substrate pH self-regulation and heavy metal resistance control are achieved, and the physicochemical property of sandy soil is improved.

The invention discloses a method for repairing alkaline cadmium-polluted farmland in arid and semi-arid regions and application of the method, and belongs to the technical field of soil repairing. According to the method, the alkaline cadmium polluted farmland soil in the arid and semi-arid areas is subjected to deep ploughing treatment, and organic materials are applied to improve the soil fertility and the environment and health quality. On the basis, an intercropping planting system suitable for the arid and semi-arid land area is constructed, low-cadmium-accumulation grain crops and high-cadmium-accumulation plants are reasonably selected according to the ecological conditions and crop characteristics of the area, and an intercropping combination of low-absorption grain crops and enriched economic crop plants is formed. According to the system, organic unification of source reduction of heavy metal pollution in soil, pollution control in the planting process and continuous and safe utilization of the farmland is achieved, the dual goals of pollution remediation and farmland production are taken into account, and pollution reduction and collaborative improvement of economic benefits are achieved; and a feasible technical path is provided for ecological restoration of alkaline heavy metal polluted farmlands in arid and semi-arid regions.

The invention belongs to the technical field of water-soluble fertilizer preparation, and particularly relates to a water-soluble biochar base fertilizer, which is prepared from the following raw materials in parts by mass: 30 to 40 parts of composite modified biochar, 15 to 20 parts of urea, 10 to 20 parts of potassium nitrate, 10 to 15 parts of sodium borate, 2 to 5 parts of copper sulfate, 0.5 to 1 part of zinc sulfate and 0.5 to 1 part of microbial agent. The surface of the biochar contains more oxygen-containing functional groups due to the excellent porous adsorption structure of the biochar, so that soil adsorbs a large number of positive ions, the cell biological permeability is improved, the photosynthesis of plants is enhanced, the nutrient and moisture absorption capacity of plant root systems is enhanced, and the yield and income of food crops and commercial crops are increased by matching with other nutritional ingredients.

The utility model discloses an all-directional spraying device for a microelement fertilizer for commercial crops, which relates to the technical field of fertilizer spraying and comprises a fertilizer liquid box and a storage battery. Straps are fixed to the two ends of the left side face of the fertilizer liquid box, a liquid inlet pipe is arranged on the top face of the fertilizer liquid box, a liquid pump is placed on the bottom face in the fertilizer liquid box, a liquid outlet of the liquid pump is connected with one end of a liquid conveying pipe, the other end of the liquid conveying pipe is connected with a liquid inlet of an atomization spray head, and an adjusting unit is arranged on the side face of the fertilizer liquid box. An atomizing nozzle is mounted in the adjusting unit, and the storage battery is fixed on the bottom surface of the fertilizer liquid box; according to the omni-directional spraying device for the microelement fertilizer of the commercial crops, three-dimensional omni-directional uniform spraying is achieved through the atomizing nozzles with the adjustable height, and the omni-directional spraying device is suitable for different crop plant types; intelligent liquid level monitoring and material mixing and stirring functions are provided, so that the fertilizer concentration stability is ensured, and liquid interruption is avoided.

This invention provides a remote sensing intelligent monitoring method for non-grain crop conversion in mountainous areas using zero-sample change detection. The method collects high-resolution optical images, farmland vector data, and economic crop data to construct a typical example library containing seven types of farmland non-grain crop conversion changes. It calculates the change feature vectors for each change type, uses the SAM model for semantic segmentation of pre- and post-processing images, and designs a semantic information change detection operator based on spatially regularized diffusion learning clustering and dual-temporal latent spatial matching. This achieves zero-sample-based extraction of non-grain crop conversion patches in mountainous areas. This invention requires only a small number of typical examples to construct the example library, avoiding large-scale labeled training samples. It is low-cost and highly efficient. The spatially regularized diffusion learning clustering post-processing algorithm improves the segmentation accuracy of fragmented farmland in mountainous areas, and the semantic information change detection operator based on dual-temporal latent spatial matching enhances the detection accuracy of non-grain crop conversion. This provides a new solution for refined farmland identification and food security monitoring.

The application provides an economic crop information recognition method and system based on deep learning, comprising: cutting the unmanned aerial vehicle multispectral remote sensing image of a research area according to a prescribed shape to obtain a regular shape image; sample labeling is performed on the regular shape image, and the regular shape image is divided into a training set, a verification set and a test set; the U-Net model is trained according to the training set and the verification set; the trained U-Net model is used as a basic model, an Inception structure and an SE-Block are added, and the network is deepened; the hyperparameters are selected to optimize the parameters of the network-deepened model, an improved deep learning semantic segmentation ISDU-Net model is generated, and the ISDU-Net model is trained based on the training set and the verification set; and the trained ISDU-Net model is used for information recognition of economic crops. The improved deep learning semantic segmentation model is used for extracting unmanned aerial vehicle remote sensing images of economic crops and completing rapid mapping, and is outstanding in small sample category prediction, thereby providing a new idea for accurate recognition of economic crops.

The invention relates to a planting technology for cooling and storing water for a soil body by utilizing solar power generation refrigeration, which comprises an anti-seepage water storage tank 1, an anti-seepage heat insulation water storage tank 2, a refrigeration pipe 3, a refrigeration pipe sleeve 4, a drip irrigation pipe 5, a breathable layer 6, an organic fertilizer treatment plant partition 7, an organic matter treatment freezing partition 8, a ground surface organic heat insulation layer 9, a planting tree 10, an excavation interface 11, a water absorption layer 12, a refrigerator 13 and a photovoltaic panel 14. Commercial crops 15 and a refrigeration header pipe 19.

The present invention belongs to the technical field of planting. Disclosed is a method for maize-flue-cured tobacco crop rotation with double intercropping of pea / barley. In the method for maize-flue-cured tobacco crop rotation with double intercropping of pea / barley of the present invention, a specific planting pattern for the crop rotation is "flue-cured tobacco-intercropped pea-intercropped barley-rotated maize-intercropped pea- rotated barley-flue-cured tobacco". The symbiotic period of the double intercropped crops in this pattern reaches 70d, and a multiple cropping index of cultivated land is increased to "six harvests in two years", leading to a substantial increase in economic benefits. Moreover, this pattern can effectively reduce the occurrence of continuous cropping obstacles in cash crops such as flue-cured tobacco and peas, and thus is a "grain-tobacco-cash crop coordinated development pattern" that enables sustainable and efficient production. The economic benefits are greatly improved. In addition, pea seedlings are applied to attract migrating tobacco aphids, which reduces aphid infestations and prevents the occurrence of climatic spot disease and tobacco brown spot in upper tobacco leaves caused by excessive nutrient absorption in the late growth stage of flue-cured tobacco.

The invention provides a mountain cultivated land non-grain remote sensing intelligent monitoring method based on zero sample change detection, and the method comprises the steps: collecting a high-resolution optical image, a cultivated land vector and economic crop data, constructing a cultivated land non-grain change detection typical sample library containing seven change types, calculating the change feature vector of each change type, and calculating the change feature vector of each change type; semantic segmentation is carried out on front and later images by using an SAM model, a semantic information change detection operator for spatial regularization diffusion learning clustering post-processing and dual-time-phase potential space matching is designed, and non-grain pattern spot extraction of the mountain cultivated land based on a zero sample strategy is realized. According to the method, only a small number of typical samples are needed to construct the sample library, large-scale training sample marking is avoided, the cost is low, the efficiency is high, the segmentation precision of the broken farmland in the mountainous area is improved through the space regularization diffusion learning clustering post-processing algorithm, the farmland non-grain detection precision is improved through the semantic information change detection operator matched with the double-time-phase potential space, and the method is suitable for popularization and application. And a new solution is provided for fine identification of cultivated land and grain safety monitoring.

The invention discloses an inter-row mechanical and inter-plant laser combined weeding device, which relates to the technical field of agricultural intelligent equipment and specifically comprises a field walking chassis, a mechanical weeding system, a laser weeding system and a weed collecting system. The mechanical weeding system can accurately remove weeds between rows, and by means of a drawing mode and cooperation with negative pressure adsorption of the weed collection system, weed collection is achieved, and weed residue breeding is avoided; according to the laser weeding system, the types and positions of weeds are positioned through visual recognition, laser energy is precisely regulated and controlled in a non-contact scanning mode, weeds of different types and maturity are selectively ablated, and economic crops are prevented from being damaged while inter-plant weed inactivation is achieved; by means of mechanical-laser synergistic weeding operation, the problems that traditional inter-plant mechanical weeding operation is poor in environment adaptability, soil and crops are prone to damage, single laser weeding is large in energy consumption, efficiency is difficult to improve and the like are effectively solved, and cost reduction and efficiency improvement of complex farmland weeding operation are expected to be achieved.

1. The name of the design product: all-terrain vehicle pesticide spraying robot (F052001). 2. The use of the design product: the robot belongs to the field of intelligent agriculture, and the core application scene focuses on the field of agricultural production. It can implement intelligent pesticide spraying and irrigation operations for various plants such as crops, fruit trees, and economic crops. 3. The design points of the design product: the combination of shape, pattern, and color. 4. The picture or photo that best indicates the design points: perspective view. 5. The design for which protection is sought includes color.

The invention provides a plant cold-proof, stress-resistant and anti-freezing method for enhancing plant respiratory conduction efficiency, and relates to the technical field of plant cultivation and stress-resistant protection. According to the method, a composite anti-freezing agent containing auxin, a conduction accelerant, a stress-resistant inducer, an osmotic regulator and a nutritional supplement is prepared and sprayed to the whole plant 24-48 hours before low-temperature freezing injury occurs, the respiration and nutrient conduction efficiency of the plant are enhanced, dry matter is quickly accumulated to reduce the freezing point of cells, and a stress-resistant defense system is started. The core innovation lies in multi-component synergistic adaptation, precise spraying opportunity control and broad-spectrum crop adaptability, and the problems that a traditional method is limited in anti-freezing effect and prone to causing physiological unbalance of plants are solved. Practice verification shows that the method can improve the cold resistance of the plants by 2-5 DEG C and reduce the freezing damage loss rate by more than 60%, is suitable for various plants such as field crops, garden crops and commercial crops, is simple and convenient to operate and controllable in cost, and provides effective technical support for plant cultivation in an extremely low-temperature environment.

The invention provides an oxamido multi-nitrogen-source core-shell structure long-acting slow release fertilizer as well as a preparation method and application thereof. The slow-release fertilizer is of a core-shell structure, the core-shell structure comprises an inner core area and a shell, the inner core area at least comprises a quick-acting core, and raw materials of the quick-acting core comprise a quick-acting nitrogen source, a medium trace element compound, humus, poly-polyhydroxy acid and a first auxiliary agent; the shell is prepared from the following raw materials: slow-release nitrogen source oxamide, a second auxiliary agent and a biological agent. Controllable slow release within 50-200 days is achieved, the nitrogen utilization rate is increased by 1.25-2 times compared with a conventional compound fertilizer, the nitrogen and carbon utilization rate is remarkably increased, and carbon emission to the atmosphere is reduced. The fertilizer can meet the requirements of the whole growth period after being applied once, is suitable for food crops and commercial crops, and has remarkable economic and environmental benefits.

The present application proposes a near-natural improvement method for the soil quality of degraded saline wetland based on the cultivation of economic crops. It belongs to the technical field of wetland ecological engineering. The method comprises: 1. site selection and soil quality assessment of the recovery area; 2. soil structure improvement and leaching control; 3. seedling cultivation and artificial inoculation at regular intervals; 4. hydrological process regulation and nutrient addition; 5. economic crop collection and soil quality assessment. The method has clear principles and strong operability. Through the coupling of soil modification-plant cultivation-hydrological regulation, the method realizes the synergistic effect of improving the efficiency of degraded soil improvement and increasing the economic benefits of crops, and the design idea is consistent with the near-natural restoration concept, without any engineering safety hazards and ecological disturbance risks.

The present application relates to the field of economic crop cultivation, and more particularly to application of MnPSe3 nanoparticles in improving salt stress resistance of plants. The present application uniformly mixes MnPSe3 nanoparticles with water to prepare a nano-solution, and then sprays the nano-solution on the surface of plant leaves. Spraying this MnPSe3 nanoparticles on the leaves of ice plants under salt stress environment can significantly alleviate the salt stress of the ice plants, and at the same time, enhance the antioxidant capacity and sugar resistance of the ice plants. The method of the present application not only improves the yield of the ice plants under salt stress, but also improves the alpha-amylase inhibitory activity of the ice plants.

The invention provides a plant AI cultivation technology integration system conforming to a green standard, and relates to the technical field of agricultural intelligent cultivation. The system takes an AI main control module as a core, integrates a green basic configuration module, an environment regulation and control module, a full-process cultivation technology module, an intelligent equipment module, a quality standard management and control module and a traceability module, realizes green standardized configuration of land, a culture medium, a fertilizer and a nutrient solution, and AI dynamic adaptation of natural and artificial environments; the whole process technologies of breeding, cultivation, irrigation and drip irrigation, pollination, harvesting, packaging, processing and the like are synergistically integrated and intelligently optimized. By means of the system, the green index reaching rate of cultivated products can be 100%, the yield is improved by 30% or above compared with traditional cultivation, the product quality meets the domestic and import and export dual standards, the system is suitable for cultivation of various plants such as grains, fruits and vegetables and commercial crops, and the green, intelligent and industrial level of agricultural production is remarkably improved.

The utility model relates to the field of precision seeding, and discloses a precision seeding machine for agricultural commercial crops, which comprises a machine body, the inner wall of the bottom end of the machine body is fixedly connected with a shell, the right side of the shell is fixedly connected with a motor I, the driving end of the motor I is fixedly connected with a worm, the inner wall of the shell is rotatably connected with a worm gear, and the worm gear is fixedly connected with the right side of the shell. Two feeding ports are fixedly connected to the inner wall of the machine body, hollow discs are fixedly connected to the bottoms of the feeding ports, a rotating column is rotationally connected to the inner wall of the machine body, a material sowing disc is rotationally connected to the inner wall of the rotating column, and a discharging port is fixedly connected to the bottom of the rotating column. According to the soil turning and flattening device, the soil turning and flattening effects are achieved, soil can become looser through soil turning, the air permeability and the water-retaining property of the soil are improved, the development of crop root systems is facilitated, and the surface of the flattened soil can ensure that seeds are uniformly distributed, and crops can grow neatly and consistently.

The invention is suitable for the technical field of traditional Chinese medicine planting, and provides a three-dimensional traditional Chinese medicine planting device which comprises a polygonal box body, multiple faces of the polygonal box body are each provided with a plurality of taking and placing openings, supporting plates slidably pass through the multiple taking and placing openings, planting boxes are placed on the multiple supporting plates, matrix soil is filled in the multiple supporting plates, and the multiple supporting plates are used for planting plants. Outer baffles are fixedly installed on the outer sides of the multiple planting boxes, so that the supporting plate carries the planting boxes and the outer baffles to be stored into the polygonal box body, and then the taking and placing opening is closed. According to the three-dimensional traditional Chinese medicine planting device provided by the scheme, a three-dimensional planting solution with fixed personnel position and self-adaptive equipment adjustment is constructed through cooperative cooperation of the rotatable polygonal box body structure and the linkage type telescopic supporting plate, and on the premise that authentic quality cultivation conditions of traditional Chinese medicine are guaranteed, the three-dimensional planting efficiency is improved. The contradiction of land contention between commercial crops and grains is effectively relieved, and the labor intensity of large-scale traditional Chinese medicinal material planting is reduced.

The invention belongs to the technical field of economic crop planting equipment, and particularly relates to an economic crop pot seedling transplanter and a transplanting method. According to the economic crop pot seedling transplanter, two paths of mechanical transmission are established by taking a walking land wheel shaft as a unified reference: one path drives a seedling taking manipulator to perform periodic clamping and releasing; and the other path drives a box moving mechanism through a screw pair to realize transverse reciprocating, drives a squirrel-cage type seedling feeding wheel to perform one-way indexing, and completes longitudinal stepping seedling feeding and seedling taking alignment in cooperation with geometric meshing of a bulge on the bottom surface of a hole tray and a grid structure. Bracket channels arranged side by side in a left-right mode can be arranged for parallel operation, and the circulating transplanting process of clamping, transverse moving alignment and throwing is executed along with advancing of the whole machine. The mechanical self-synchronization of the whole machine rhythm is realized, the self-adaption at any speed is realized, the seedling feeding pitch is stabilized, the stable clamping and flexible release are realized by the clamping jaw composite guide geometry, the structure is simple, the maintenance is convenient, and the device is suitable for the continuous transplanting of economic crop pot seedlings under complex working conditions such as many mountainous regions, large slopes and small planting areas.

The invention belongs to the field of preparation of agricultural fertilizers, and particularly relates to a preparation method of an agricultural liquid calcium potassium molybdenum ammonium nitrate fertilizer and an obtained product. The preparation method comprises the following steps: firstly, accurately metering a calcium nitrate solution, an ammonium nitrate solution, potassium sulfate and an ammonium molybdate solution, adding the calcium nitrate solution and the ammonium nitrate solution into a batching tank, starting stirring, slowly adding the potassium sulfate and the ammonium molybdate solution, slowly adding an anti-crystallization agent at the same time, and carrying out a stirring reaction; and setting temperature interlocking of the batching tank, after the reaction is finished, adding a stabilizer into the reaction liquid, adjusting the pH value, uniformly stirring, and cooling to obtain the product. By optimizing a formula and a preparation process, the influence on the environment is reduced, and the compound fertilizer is suitable for food crops, commercial crops and special crops, meets the characteristic of nutritional requirements of different crops, and is wide in adaptability; the method has remarkable economic, social and ecological benefits, and is beneficial to improvement of agricultural production efficiency and promotion of agricultural sustainable development.

The application provides a remote sensing multispectral imaging system for agricultural monitoring, and relates to the technical field of space remote sensing.The application realizes accurate selection by determining an economic crop through an indication economic crop determination module, analyzing historical soil salt content and water shortage data, and selecting a sensitive crop; the correlation evaluation module calculates a water shortage index change rate, analyzes the correlation between historical and current data, and improves the prediction accuracy; the value range determination module divides soil salt content intervals and combines evaluation coefficient standardized management data; the indication area determination module uses multispectral images to realize accurate monitoring and enhance representativeness; the humidity evaluation module analyzes local spectral data to quantify soil humidity; the prediction model construction module uses machine learning to predict salt content, and can accurately predict the dynamic changes of soil salt content and moisture; the correlation analysis module combines the prediction model to check real-time monitoring data; and the division module optimizes soil management strategies according to the water shortage index and humidity coefficient.

The invention relates to the technical field of gordon euryale seed-wheat rotation planting, in particular to a gordon euryale seed-wheat paddy-upland rotation efficient planting method. Comprising the following steps of crop rotation connection, variety selection, field flood-drought conversion, mechanical operation and fertilizer and water collaborative management, gordon euryale seed seedling raising is carried out in advance in the first ten days of April, accurate position clamping is carried out on sowing and harvesting time of wheat, water drainage and humidity reduction are carried out in cooperation with cross-shaped ditches or cross-core ditches dug after gordon euryale seeds are harvested, and it is ensured that soil rapidly recovers the soil moisture content needed by wheat sowing; meanwhile, pathogen killing is carried out after the gordon euryale seeds are harvested, accumulation of harmful microorganisms is avoided, crops for rotation are scientifically and reasonably arranged, seamless connection of gordon euryale seed-wheat production is achieved, land, light, heat and water resources are effectively utilized, the land yield is increased, collaborative development of grain crops and commercial crops is promoted, reasonable allocation and efficient conversion of resources are promoted, and the economic benefit is increased. And agricultural production can be promoted to develop towards a higher-quality and more sustainable direction.

The invention belongs to the technical field of soil conditioners, particularly relates to a saline-alkali soil conditioning fertilizer based on composite functional bacillus subtilis and a preparation method of the saline-alkali soil conditioning fertilizer, and aims at solving the problems that an existing saline-alkali soil conditioning fertilizer is poor in soil improvement effect and insufficient in crop stress resistance and yield increase synergy. The fertilizer comprises the following components in parts by weight: a decomposed compound organic fertilizer, a bacillus subtilis complex microbial inoculant, a multifunctional auxiliary material component and a chelated nutrient system substance, the decomposed organic fertilizer lays a soil improvement foundation, the complex microbial inoculants activate micro-ecology, the multi-functional auxiliary materials synergistically optimize the soil structure and salinity and alkalinity, and the chelated nutrient system supplements nutrients such as zinc. The soil condition of the saline-alkali soil can be adjusted, the pH of the soil is increased, soluble salt of the soil is reduced, meanwhile, the biological characters and yield of main grain crops and commercial crops such as wheat, corn and cotton in the saline-alkali soil are improved, and the yield increasing effect on the crops is achieved.

The present application belongs to the field of soil remediation, and particularly relates to a method for remediation of cadmium contaminated soil. The specific technical scheme is as follows: a soil remediation method comprises the following steps: before planting economic crops, applying sulfate-reducing bacteria to the soil to be remediated; after harvesting the economic crops, planting cadmium extraction crops in the soil to be remediated. The present application provides a water-flood rotation soil remediation method which can produce while remediation. On the one hand, the biological passivation can reduce the biological availability of cadmium in the soil, thereby reducing the stress of cadmium on plants and the absorption and accumulation of cadmium by plants; on the other hand, the biological technology can strengthen the ability of nightshade to extract cadmium, thereby extracting cadmium in farmland soil.

This invention relates to the field of agricultural technology, and in particular to a value-added water-soluble compound fertilizer, its preparation method, and its application. The raw materials for its preparation include: urea, powdered ammonium sulfate, crystalline monoammonium phosphate, potassium sulfate, biochemical potassium humate, neutral mineral-derived potassium humate, aminobutyric acid, nitrification inhibitor DMPP, citric acid chelate, and polyglutamic acid. The water-soluble fertilizer obtained by this invention is suitable for various fertilization methods such as water-soluble fertigation, drip irrigation, and foliar application in field crops, cash crops, and greenhouse cultivation. Under the background of reducing nitrogen application, it can achieve equivalent or better yields and quality with lower nitrogen application intensity, balancing economic efficiency and environmental friendliness.

This invention relates to an automatic water flow switching valve, comprising a valve body. The valve body internally includes a water inlet channel, a drip irrigation outlet channel, a micro-sprinkler irrigation outlet channel, and an internal cavity. The water inlet channel, drip irrigation outlet channel, and micro-sprinkler irrigation outlet channel are connected through the internal cavity. A drip irrigation valve core is installed in the drip irrigation outlet channel, which closes as the inlet water pressure increases. A micro-sprinkler irrigation valve core is installed in the micro-sprinkler irrigation outlet channel, which opens as the inlet water pressure increases. When the drip irrigation valve core is open, the micro-sprinkler irrigation valve core is closed; when the drip irrigation valve core is closed, the micro-sprinkler irrigation valve core is open. This invention's valve effectively achieves free switching between micro-sprinkler irrigation and drip irrigation by simply adjusting the water pressure. The valve has a simple structure, is easy to maintain, and is low in cost. It can be well applied to efficient water-saving irrigation and precise fertilization and spraying of economic crops and horticultural crops such as fruit trees, vegetables, flowers, and seedlings.