1198results about "Rice cultivation" patented technology

The invention discloses an intelligent fish and rice symbiosis ecological control system and method based on the Internet of Things. The system comprises a fish breeding area, a rice irrigation area and a circulating water channel arranged between the fish breeding area and the rice irrigation area. The central control platform is used for collecting a dissolved oxygen (DO) value and a pH value in a water body in real time through a plurality of water quality sensors configured in the system; the dissolved oxygen DO value and the pH value are water quality data; and analyzing the dissolved oxygen DO value, generating a water quality regulation and control instruction, and regulating the oxygenation equipment according to the water quality regulation and control instruction. The automatic buffering agent adding device is used for automatically adding a buffering agent according to an instruction sent by the central control platform; the oxygenation equipment comprises an aeration device and is used for adjusting the content of dissolved oxygen in the water body. According to the intelligent fish and rice symbiosis ecological control system based on the Internet of Things, the fish culture area, the rice irrigation area and the circulating water channel are integrated, effective management and control of the fish and rice symbiosis ecological system are achieved, the water body environment is optimized, and the symbiosis benefits of fishes and rice are improved.

The invention discloses a methylobacterium strain and application thereof, the methylobacterium strain is methylobacterium asperum DSD, and the preservation number of the methylobacterium strain in the China Center for Type Culture Collection (CCTCC) is CCTCC NO: M2023445. The methylobacterium strain disclosed by the invention can be applied to rice planting, the biomass of rice can be improved in a foliage spraying or root application mode, and meanwhile, the cadmium content of the overground part and root system of the rice can be reduced. The operation method is simple and easy to implement, the selected methylobacterium strain has the advantages of being low in cost, easy to obtain, environmentally friendly and the like, and the technical problem that the effect of microorganisms on the aspects of cadmium reduction and growth promotion of rice is single is solved to a certain extent.

Disclosed is a rice and wheat nitrogen nutrition multispectral diagnosis method for precise fertilization by unmanned aerial vehicles (UAVs), including: step 1, acquiring multispectral UAV remote sensing images and collecting agronomic parameters of rice and wheat, and establishing a nitrogen nutrition spectral diagnosis model; and step 2, calculating a critical nitrogen concentration in aboveground parts of rice and wheat based on a critical nitrogen concentration dilution model for amount of dry matter, and further obtaining a critical nitrogen uptake; calculating an actual nitrogen uptake in the aboveground parts of rice and wheat based on the nitrogen nutrition spectral diagnosis model; and obtaining a recommended nitrogen topdressing amount for rice and wheat during corresponding stages based on the critical nitrogen uptake and the actual nitrogen uptake. The present disclosure ensures stable yields of rice and wheat while reducing input of chemical fertilizers and labor, presenting a promising application prospect.

The invention provides a rice endophyte for promoting rice growth and reducing cadmium as well as a preparation method and application of the rice endophyte, and relates to the field of environmental microbiology and agricultural microorganisms. The rice endophyte is stenotrophomonas, is named as Stentrophomonas sp.R5, is preserved in the China Center for Type Culture Collection, the address is Wuhan University, Wuhan, China, the postcode is 430072, the preservation number is CCTCC NO: M 20231758, and the preservation date is September 20, 2023. The rice endophyte not only has the capabilities of producing IAA, dissolving phosphorus, producing siderophores and the like for promoting the growth and development of rice, but also has an efficient inhibition effect on absorption and transportation of cadmium in the rice, particularly, the cadmium reduction amplitude of mature rice grains reaches up to 57.69%, and the rice endophyte has little influence on microbial communities in a soil environment, and has a good application prospect. Excessive interference is not caused, and conversion of available nutrients in the soil is promoted.

The invention discloses a composite foliar barrier and application thereof in reducing cadmium accumulation in brown rice. The composite foliar barrier comprises: NaHS concentration of 10-20 μmol / L; melatonin concentration of 20-30 μmol / L; taurine concentration of 0.1-0.5 g / L; surfactant concentration of 0.1-0.3 g / L; and the remainder of water. The composite foliar barrier is sprayed in the tillering stage, heading stage and filling stage of rice, and the spraying amount per mu is 30-50 kg each time. The invention utilizes the synergistic effect of NaHS, melatonin and taurine, adopts surfactant to increase the spreading area, and jointly greatly improves the cadmium reduction effect of brown rice, and the cadmium reduction efficiency can reach more than 85%. The foliar barrier of the invention has simple components, is easy to operate, and has outstanding effect.

The invention provides a method for preparing carbon quantum dot reinforced subcritical artificial humic acid and applying the carbon quantum dot reinforced subcritical artificial humic acid to a rice field, which comprises the following steps: collecting organic wastes, and drying, grinding and sieving the organic wastes to obtain pretreated raw materials; the preparation method comprises the following steps: mixing pretreated raw materials with water, reacting in a hydrothermal carbonization system at 200-280 DEG C for 1-3 hours, modifying through acid-base pretreatment, adjusting a reaction medium or an additive, and naturally cooling to obtain a natural substance subjected to hydrothermal carbonization; carrying out solid-liquid separation on the natural substance subjected to hydrothermal carbonization by using a 100-mesh coarse filter screen to obtain solid-phase hydrothermal carbon and liquid-phase artificial humic acid; carrying out purification treatment on the liquid-phase artificial humic acid for 48 hours by using a dialysis bag to obtain carbon quantum dots and characterizing the carbon quantum dots; the carbon quantum dot reinforced subcritical artificial humic acid is applied to a rice field, and is additionally applied in a fertilization period. Compared with a traditional composting technology, the scheme has the advantages that the carbon conversion rate is increased by 2-3 times, the soil fertility can be improved, and the rice yield is increased.

The invention discloses a water and fertilizer management method for transplanted high-yield indica type two-line hybrid rice, and belongs to the technical field of rice cultivation. Comprising the following steps: (1) applying citric acid chelated calcium magnesium phosphate fertilizer to soil before transplanting; (2) applying coated controlled-release urea and a silicon-zinc fertilizer on the third day after transplanting; (3) when the tiller number reaches 2650,000-2750,000 plants / hm < 2 >, starting intermittent light field drying for three times, and deeply applying potassium magnesium sulphate before field drying; (4) laterally and deeply applying urea and a boron-humic acid chelate when tips of two inverted leaves are exposed; (5) spraying an aqueous solution in a full heading stage, wherein the aqueous solution comprises monopotassium phosphate, chelated zinc and brassinolide. Through staged precise fertilization, special chelating / controlled release fertilizer and water and fertilizer-field drying cooperation, the method has the advantages that the fertilizer utilization rate is increased, the nutritional requirements of rice in each growth period are precisely matched, and water and fertilizer cooperative management is optimized.

The invention discloses a biological control method for rice panicle blight, and belongs to the technical field of agricultural pest control. The method comprises the following steps that healthy and full seeds are selected, and before sowing, the disinfected seeds are soaked in a solution containing bacillus subtilis for pretreatment; the method comprises the following steps: before rice transplanting, applying a mixed bacterial agent 1 containing trichoderma harzianum, bacillus subtilis, bacillus velezensis and bacillus pumilus bacterial liquid into soil; in the booting stage and the pustulation stage of the rice, a mixed bacterial agent 2 of bacillus subtilis and bacillus velezensis is sprayed to the plants respectively. The biological control method adopted by the invention is green and environment-friendly, and does not cause pollution to the environment and agricultural products; the selected microbial strains can effectively inhibit the growth and reproduction of the rice panicle blight germs, so that the occurrence degree of diseases is reduced; after the biological control method is used for a long time, the soil micro-ecological environment can be improved, and the autoimmunity of the rice can be improved.

The invention discloses a fertilization recommendation method combined with a rice seedling raising fertilizer carrying technology in the technical field of agricultural production. The fertilization recommendation method comprises the following steps: S1, acquiring geology and seedling raising states; s2, presetting rice growth requirements; s3, calculating to obtain an additional nutrient amount; s4, dividing the growth cycle of the rice; s5, recommending the fertilization amount according to stages; according to the method, nutrient supply of seedling raising fertilizer is brought into a whole-growth-period fertilization plan, and accurate matching is achieved; on the premise that the yield is not affected, the fertilizing amount in the early and whole growth periods of rice is remarkably reduced, and the fertilizer utilization rate is increased; through dynamic matching of the early-stage fertilizer loading and supplying amount and the middle and later-stage fertilizer needing amount, resource waste caused by excessive fertilization is avoided, and the fertilizer cost is reduced; the nutrient proportion is scientifically distributed according to the nutrient absorption efficiency of each stage, and the fertilizer utilization rate is increased; the final yield can be improved; soil fertility indexes and historical data are combined, the profit and loss trend of soil nutrients is recognized, and cyclic utilization of the soil nutrients is achieved through dynamic matching of the sustained and controlled release fertilizer and the organic fertilizer.

Provided in the present disclosure are a method for increasing the biomass, yield and nitrogen utilization rate of crops, and an iron-rich compound fertilizer. The method comprises: supplementing and applying an iron fertilizer to a crop, wherein the microelement iron in the iron fertilizer can significantly promote the absorption and assimilation of the mineral nutrition of a nitrogen-containing chemical fertilizer by the crop to which the fertilizer is applied, thereby producing a synergistic effect, and the amount of the iron fertilizer applied to the crop is 0.37-0.74 kg per Chinese acre. Moreover, by means of the method provided by the present disclosure, the tillering number and the nutrient absorption and utilization of the crop can be improved after fertilization according to a method for field crops and normal field management of crops, thereby effectively improving the biomass, yield and nitrogen utilization rate of the crop.

The invention discloses pseudomonas chlororaphis S7-24 for antagonizing xanthomonas oryzae and application of the pseudomonas chlororaphis S7-24, and belongs to the technical field of microorganisms. The pseudomonas chlororaphis S7-24 is preserved in the China Center for Type Culture Collection on November 12, 2025, and the preservation number of the pseudomonas chlororaphis S7-24 is CCTCC NO: M 20252533. The pseudomonas chlororaphis S7-24 provided by the invention is a newly found pseudomonas biocontrol resource, and verification shows that the strain S7-24 has relatively high antagonistic activity on rice bacterial blight and rice bacterial streak, and can be used for effectively preventing and treating rice bacterial blight and rice bacterial streak. The pseudomonas chlororaphis S7-24 provided by the invention is used for preventing and treating rice bacterial leaf blight and rice bacterial leaf streak, can reduce the use amount of chemical pesticides, ensures grain safety, and has better economic and ecological benefits.

The invention provides a high-yield cultivation method for rice-morchella esculenta crop rotation, which specifically comprises the following steps: step 1, remaining previous rice stubbles, and turning over the rice stubbles into soil; step 2, laying a fungus bed substrate on a furrow surface and sowing; step 3, spraying a bacterium-promoting nutrient solution and a protective agent; step 4, after the morchella esculenta is harvested, turning over the fungus bed substrate into soil and applying a base fertilizer; 5, rice is transplanted, and tillering fertilizer, fish protein fermentation liquor and leaf fertilizer are applied; step 6, spraying an insecticide; step 7, harvesting the rice and remaining stubbles, and continuing planting the morchella esculenta; according to the method, the problems of nutrition imbalance, chemical residues, fertilizer efficiency lag and the like in the existing crop rotation technology are solved one by one through the steps of systematic optimization of a fungus bed substrate, nutrition management, base fertilizer preparation and the like.

The invention belongs to the technical field of biological prevention and control, and particularly relates to a Burkholderia paragallinarum D15 and application of the Burkholderia paragallinarum D15. The Burkholderia parakholderia sp. D15 is preserved in China General Microbiological Culture Collection Center (CGMCC) on November 25, 2024, the address is No.3, No.1 yard, Beichen West Road, Chaoyang District, Beijing, and the preservation number is CGMCC NO. 1.61962. The Burkholderia parakholderia sp. D15 has the advantages that the Burkholderia parakholderia sp. According to the invention, a multifunctional strain Burkholderia paragallinarum D15 is separated from the rock wall of Danxia red rock, and the Burkholderia paragallinarum D15 has a relatively good antagonistic effect on most plant pathogens and has a relatively strong bacteriostatic effect on xanthomonas oryzae Xoo causing rice bacterial blight; the compound also has a relatively strong bacteriostatic effect on other pathogenic bacteria causing crop diseases, such as rice sheath blight disease, rice blast, fusarium graminearum, sclerotium rolfsii and ralstonia solanacearum, and lays a foundation for prevention and treatment of rice bacterial blight and development of related biological preparations.

The invention provides application of small peptides in preventing and treating plant diseases and promoting plant growth. The structural formula of the small peptide is shown in the specification. Experimental results show that the small peptide shown in the formula A has the effects of improving the disease resistance of plants and regulating the growth of the plants. The small peptide not only can be used as a plant immune resistance inducer at low concentration to improve the immunocompetence of plants for resisting pathogen invasion, but also can promote plant growth, and has a good application prospect. R1-R2-beta-Ala-Trp-Gly-NH2 Formula A

The invention discloses a special organic-inorganic compound fertilizer for improving the yield and quality of rice in a rice field, and belongs to the technical field of agricultural fertilizers. The compound fertilizer comprises a three-layer structure consisting of a porous core layer, a quick release coating layer and a biodegradable film, wherein the porous core layer is prepared from ammonium polyphosphate, potassium humate, nano charcoal modified chicken manure, mineral source potassium fulvate and sodium carboxymethyl cellulose-bentonite composite colloid; the quick-release coating layer is prepared from sulfur-resin double-layer coated urea, amino acid chelated zinc, alginic acid complex boron, silica sol, ammonium molybdate, 5-aminolevulinic acid and nano cerium oxide; the biodegradable film is prepared from a film forming solution and a bioactive microbial agent. Through the design of a three-layer structure and the combination of an organic-inorganic-microorganism synergistic technology, accurate matching of nutrient release and a rice fertilizer requirement rule is achieved, meanwhile, soil health and environmental protection are considered, and an innovative solution is provided for green high-yield rice planting.

The invention discloses a composition containing iso-aromatic oxalic acid and taurine and application of the composition in relieving salt stress of crops. The composition is composed of iso-aromatic oxalic acid and taurine according to a mass ratio of 1: (1-4). According to the composition containing the iso-aromatic oxalic acid and the taurine, the iso-aromatic oxalic acid and the taurine are compounded according to the specific mass ratio of 1: (1-4), the growth and salt tolerance of crops can be enhanced through the synergistic effect of the iso-aromatic oxalic acid and the taurine, and especially for common food crops such as wheat and rice, the growth and salt tolerance of the crops can be improved. A good growth state can still be kept in a saline-alkali environment, the germination rate of crops is increased, tender leaves and roots are long, and the application prospect in agricultural production is very wide.

The invention belongs to the technical field of soil conditioners, and particularly relates to a rice field soil conditioner and application thereof. The invention relates to a rice field soil conditioner. The rice field soil conditioner is composed of a compound fertilizer and a complex microbial inoculant, the compound fertilizer is prepared by mixing the following components in parts by weight: 20-30 parts of rice husk biochar, 20-30 parts of shell powder and 10-15 parts of potassium fulvate, the complex microbial inoculant is prepared by mixing the following components: 3-4 parts of paenibacillus polymyxa; 2 to 3 parts of bacillus marinus; and 1.5 to 2 parts of bacillus firmus. The soil conditioner is composed of a compound fertilizer and a complex microbial inoculant, the complex microbial inoculant is formed by mixing three microbial inoculants of paenibacillus polymyxa, paenibacillus marinus and bacillus firmus, and the soil conditioner is beneficial for improving soil fertility and increasing the thousand seed weight of rice, so that the yield of the rice is increased. And the chalky grain rate of the rice can be reduced, the rice roughness, the head rice rate, the amylose content, the gel consistency and the like can be improved, the rice quality can be improved, and the economic benefit of the rice can be improved.

The invention relates to the technical field of agriculture, in particular to a preparation method and an application method of a zinc-rich cadmium-reducing yield-increasing foliar fertilizer. The specific technical scheme is as follows: the zinc-rich cadmium-reducing yield-increasing foliar fertilizer is prepared from the following components in percentage by mass: 20 to 30 percent of porous chitosan, 30 to 40 percent of L-malic acid and 40 to 50 percent of nano zinc oxide. The technical problem that in the prior art, the zinc content of rice cannot be increased, meanwhile, the rice yield cannot be increased, and the cadmium content of rice cannot be reduced is solved.

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 invention provides a method for improving biomass, yield and nitrogen utilization rate of crops and an iron-rich compound fertilizer.The method comprises the steps that an iron fertilizer is supplemented and applied to the crops, so that the microelement iron in the iron fertilizer can remarkably promote absorption and assimilation of the applied crops on mineral nutrition of the nitrogenous fertilizer, and the synergistic effect is achieved; wherein the application amount of the iron fertilizer to the crops is 0.37-0.74 kg per mu. And by adopting the method provided by the invention, the tillering number and nutrition absorption and utilization of crops can be enhanced according to a fertilization method of field crops and normal crop field management, so that the biomass, the yield and the nitrogen utilization rate of the crops are effectively improved.

The invention belongs to the technical field of agriculture, and particularly relates to a method for promoting growth and development of rice based on illumination and nitrogen. One of the purposes of the invention is to provide a method for promoting growth and development of rice based on illumination and nitrogen. The method comprises the following steps: providing cultivation conditions of illumination intensity of 600-800 [mu] mol.m <-2 >. S <-1 > and nitrogen concentration of 5.51-8.11 mM for rice in a tillering stage of the rice. By accurately applying a specific combination of illumination intensity and nitrogen concentration in the tillering stage of rice, efficient loading and long-distance transportation of photosynthetic products (especially cane sugar and the like) in phloem are promoted, and the photosynthetic products are guided to be more effectively and directionally distributed to developed library organs (such as fruits, grains or root systems); therefore, the transfer and circulation efficiency of carbon-nitrogen substances in plants is improved synergistically on the whole, the waste phenomenon of nitrogen redundancy or local lack and ineffective accumulation of photosynthetic products is reduced, and finally, an important physiological regulation basis is provided for remarkably improving the yield and quality of crops.

The invention discloses a low-carbon ecological rice-duckweed system and a construction method thereof. The system comprises a rice-duckweed symbiotic system, a duckweed coverage monitoring module and a rice field moisture monitoring and irrigation control module. The construction method comprises the following steps: duckweed putting; a water layer of 2-5 cm is kept in the period of seedling establishment; a wet-dry circulation mode is adopted from the tillering stage to the pustulation stage, in the wetting stage, a 5cm water layer is established through irrigation, the judgment index that the wetting stage is finished and the drying stage is started when the duckweed coverage degree reaches 100% is adopted, and in the wetting stage, a 1-5cm water layer is kept through irrigation; after the drying stage is started, taking the number of days of reaching the lower limit of the soil moisture content in each growth stage of the rice first or keeping the water-free layer as a discrimination index for ending the drying stage and starting the next wetting stage, and repeating the steps; drying the rice in the late tillering stage; monitoring rice field moisture information, and controlling irrigation; performing fertilization; monitoring the coverage degree of the duckweed; and returning duckweed to the field at the seasonal end. According to the method, greenhouse gas emission is greatly reduced, and the carbon sink function of the rice field is enhanced.

The invention belongs to the technical field of crop pollution prevention, and particularly relates to a rice heavy metal adsorption and isolation method based on iron agent regulation and control. According to the method, the iron agent is applied to the polluted rice field soil to induce the soil-rhizosphere interface to form an iron film, heavy metals (such as As, Cu, Pb and Cd) are fixed by virtue of adsorption and complexing effects of the iron agent, and migration of the heavy metals to rice roots is reduced, so that accumulation of the heavy metals at edible parts (leaves and ears) of the rice is reduced; the tolerance of the rice in a polluted environment is enhanced; and the risk of heavy metals in a food chain is reduced. Experiments show; through treatment of an iron film formed by a certain iron-based concentration, accumulation of the heavy metals in the rice leaves can be remarkably reduced, and the accumulation amount of the heavy metals in the rice leaves is far lower than the accumulation amount (1 / 40-1 / 120) of the heavy metals in rice roots. The invention provides an effective solution for farmland soil remediation and crop safety production.

The invention belongs to the technical field of mudflat saline-alkali soil improvement, and particularly relates to a method for improving the soil performance of heavy mudflat saline-alkali soil, which comprises the following steps of: constructing a complete paddy-upland rotation system by synergistically implementing three technologies of engineering salt reduction, dry farming water-adaptive soil improvement and rice season quality and efficiency improvement; the purposes of soil salt reduction, fertility improvement and crop yield increase are achieved through cooperation of technologies of various links such as water retaining plate insertion for water retention and nereis throwing in the rice season, soil organic matter improvement and soil improvement, the soil performance of the mud flat saline-alkali soil is remarkably improved, especially for improvement of heavy mud flat saline-alkali soil, the organic matter content of the soil is increased, and the salinity is reduced; the soil layer structure is optimized, and the purposes of increasing grain and improving economic benefits are achieved.

The invention discloses an application of an AvRRM1 gene in regulation and control of endophytic fungi teratosis to promote rice growth, and belongs to the technical field of gene engineering. The nucleotide sequence of the AvRRM1 gene is shown as SEQ ID NO.1. The application comprises the following steps: down-regulating expression of the AvRRM1 gene in the teratodontia by utilizing a biological technical means, and improving the growth promotion effect of the teratodontia on rice. The invention discloses the gene AvRRM1 for regulating and controlling rice growth in rice endophytic fungi teratosis for the first time, functional verification on the gene shows that the strain has more obvious growth promoting property on rice by knocking out the gene AvRRM1, and the research result has huge application potential in sustainable agriculture. The invention provides a feasible scheme for promoting the growth of the rice and increasing the yield of the rice.

According to the nano pesticide and the preparation method and application thereof, pH response type nano particles ZIF-90 serve as a carrier, azoxystrobin is loaded to serve as a medicine, and the nano pesticide is used for preventing and treating rice sheath blight disease caused by rhizoctonia solani. When the rhizoctonia solani infects rice, oxalic acid can be generated to reduce the pH around an infected area, so that the ZIF-90 carrier skeleton and the hyaluronic acid coating are decomposed to release azoxystrobin, and the rhizoctonia solani is inhibited in a targeted manner. It is further found that ZIF-90 and azoxystrobin have synergistic bacteriostatic activity, the EC50 value of azoxystrobin to rhizoctonia solani can be greatly reduced, after ZIF-90 carrier encapsulation and hyaluronic acid end capping, the photolysis stability of azoxystrobin can be improved, the adhesive force of azoxystrobin on rice leaves can be enhanced, and the ZIF-90 and azoxystrobin compound has important application in agricultural disease control.

The invention belongs to the technical field of pesticide weeding, and discloses a weeding composition and application thereof.The weeding composition comprises an active component A and an active component B. The active component A is isoxafop-butyl, the active component B is any one of metamifop, cyhalofop-butyl, clodinafop-propargyl and pinoxaden, and the active component B is one of isoxafop-butyl, cyhalofop-butyl, clodinafop-propargyl and pinoxaden. The mass ratio of the active component A to the active component B is (1: 12)-(24: 1). The weeding composition disclosed by the invention is wide in weed control spectrum and can be used for comprehensively preventing and controlling various weeds in rice fields and wheat fields.

The invention discloses a preparation method of a controlled-release fertilizer for mechanical transplanting rice seedling raising subsoil and application of the controlled-release fertilizer to replace field fertilization, and belongs to the technical field of rice cultivation. A coating of the controlled-release fertilizer is prepared from the following components in parts by weight: 20 to 60 parts of low-density polyethylene resin, 10 to 20 parts of ethylene-vinyl acetate copolymer, 5 to 30 parts of synthetic resin biodegradation inducer, 3 to 15 parts of starch, 10 to 70 parts of talcum powder and 0.2 to 2 parts of nonionic surfactant. The controlled-release fertilizer comprises urea and a compound fertilizer which are respectively coated by the coating film. According to the controlled-release fertilizer for the machine-transplanted rice seedling raising subsoil, a coating material is optimized, the release inhibition period of the controlled-release fertilizer is 20-30 days, normal growth of rice seedlings is ensured, and the rice growth requirements are accurately met. When the method is used for rice planting, a seedling raising subsoil fertilizer carrying method is adopted, integration of rice transplanting and fertilization is achieved, and on the basis of ensuring high and stable yield of rice, the fertilizer application cost and the risk of nitrogen and phosphorus pollution emission in the rice field are reduced.

Provided are a rice cultivation management device, a rice cultivation management method, and a rice cultivation management system that acquire one or more types of satellite data of a paddy field, calculate a water index for each day of each of a plurality of water management sections included in the paddy field on the basis of the satellite data, and classify the status for each day of each of the plurality of water management sections on the basis of the water index. It is possible to classify the daily state of each of the plurality of water management sections on the basis of the water index, store the daily state data in a calendar (time-series database), detect the water management technique that is implemented using data, and check the contents of a log book of the farmer. Furthermore, it is possible to replace the log book with the calendar in the future by using data from a water level sensor in combination. It is also possible to more accurately estimate the daily greenhouse gas emissions from individual paddy fields for the purpose of creating carbon credits.

A method for soil fertilization through synergistic return of Chinese milk vetch and rice straw in a paddy field, comprising the following steps: after rice is harvested, crushing rice straw and evenly spreading the straw in a field for rice straw composting; once the rice straw has been composted for 3-5 days, sowing Chinese milk vetch seeds, turning over and pressing the Chinese milk vetch during the peak flowering stage, and with an interval of no less than 30 days from the time of rice transplanting, performing rice transplanting in mid-to-late May; repeating the steps of rice straw composting, sowing Chinese milk vetch seeds, and turning over and pressing the Chinese milk vetch during the peak flowering stage, so as to fertilize the soil. The amount of Chinese milk vetch seeds sowed is 1.5-2 kg / mu. As a green manure, returning Chinese milk vetch to the fields in rotation with crushed rice straw can achieve carbon-nitrogen interaction, regulate the carbon-nitrogen ratio of the soil, and facilitate the recycling of nutrients.