2653results about "Rice cultivation" patented technology

The objective of the present invention is to confer pest resistance to plants of Poaceae without using any chemically synthesized pesticides. The pest resistance can be conferred to plants of Poaceae by isolating from a natural plant an endophytic bacterium capable of expressing pest resistance, artificially culturing the endophytic bacterium, and introducing the bacteria to a Poaceae plant of interest.

The invention belongs to the technical field of cultivation of agricultural crops and provides a pollution-free high-yield rice cultivating method. The pollution-free high-yield rice cultivating method includes selecting a production base accordant with pollution-free rice production standards and selecting novel high-quality high-yield anti-disease variety; selecting drought seedlings and strong seedlings of the right age, fertilizing a soil bed and cultivating the seedlings dryly; slinging the seedlings without tillage and for multiple tillers; fertilizing pollution-free rice according to the principle of taking base fertilizer as the principal and topdressing as complement, and simultaneously, interplanting glutinous rice; comprehensively preventing and controlling disease and pests, and timely harvesting in sunny days when the ripeness degree of the rice is up to 85-90%; and storing and processing the harvested rice and processing by-products of the harvested rice. The rice produced by the pollution-free high-yield rice cultivating method is high in quality and yield, safe and pollution-free, low in planting cost and simple in management method and has higher popularization and application value.

The invention relates to a method for comprehensively raising various types of aquatic livestock and cultivating paddy in a paddy field, in particular to the raising of Chinese soft-shelled turtles, crawfish and carassius auratus gibelio in the paddy field and the cultivation of paddy. The method comprises the steps of paddy field preparation, aquatic plant transplantation, live food feeding, paddy transplantation, young aquatic livestock placement, bait feeding, daily management, aquatic livestock fishing and paddy harvest. The method for comprehensively raising various types of aquatic livestock and cultivating paddy in the paddy field has the advantages that the various types of aquatic livestock can be raised and paddy can be cultivated in the same field comprehensively, the difference between the period for paddy cultivation and the period for raising aquatic livestock is small, the use rate and the comprehensive efficiency of the field can be effectively improved, and economic benefit can be improved to a large extent; meanwhile, any chemical fertilizer, herbicide and insecticide are not used in the process of production, the produced products can meet the standard of organic food, and finally, edible safety of the products is achieved; the whole process of production is beneficial to conservation of water and soil of the field and the surrounding environment and effectively facilitates the protection of natural ecology.

The selenium-rich rice cultivating process includes conventional cultivation and features that the selenium-rich agent is sprayed once during the earing up and flowering period of rice. The selenium-rich agent comprising selenium-containing inorganic compound and phosphate is dissolved in water of 50-90 times and sprayed to leaf of rice during the earing up and flowering period of rice. In case of rainy day after spraying, replenished selenium-rich agent is sprayed timely. The sprayed inorganic selenium will be converted completely into natural organic selenium, and the produced selenium-rich rice is non-toxic, and has the health functions of preventing common cold, preventing and treating hypertension and myocardial pathological changes, etc.

The invention discloses a standardized cultivation method of super double cropping rice. Currently, the super double cropping rice is cultivated still according to a traditional method for cultivating ordinary rice, yield is not stable, the quality is not high, and grain safety and income increasing of farmers are seriously affected. The standardized cultivation method includes the technical measures of selection of varieties, selection of environment of producing area, robust seedlings cultivation, field cultivation and management, integrated control over plant diseases and insect pests and the like, and systematized standardized cultivation technology integration research of the super double cropping rice is carried out. According to a test result after 56 thousand of hm2 is popularized and applied, the yield of 667 m<2> reaches 456.67 kg/ 667 m<2> averagely, the yield increase range reaches 42.57 kg/ 667m<2> averagely, the rate of growth reaches 10.27% averagely, the increased income of every 667 m<2> reaches 100.58 RMB/ 667 m<2> averagely, the cost for using chemical pesticide to control diseases, pests and the like is lowered, and the cost is saved by 6.5-7.2 RMB/ 667 m<2>. According to the technical standard, the production of the super rice is indexed and scientized, the technical operability is high, the application effect is good, the standardized cultivation method is deeply popular by mass farmers, and the gained economic benefit, social benefits and ecological benefits are remarkable.

The invention discloses a mechanically-mulching cultivation method of organic rice, relating to a rice cultivation method. The purpose of the method provided by the invention is to solve the weeding problem in paddy fields in the existing cultivation method of organic rice. The method comprises the steps of 1, selecting field environment, namely (1) selecting soil, (2) selecting air quality and (3) selecting a water source; 2, performing soil preparation in the field, namely (1) ploughing, (2) fertilizing and (3) digging canals and harrowing; 3, preparing seedbed and bed soil, namely (1) preparing seeding environment, (2) preparing seedbed and (3) preparing bed soil; 4, germination treatment of seeds, namely (1) drying seeds, (2) performing plasma treatment, (3) soaking seeds and (4) accelerating germination; 5, sowing; 6, managing seedlings, namely (1) performing insect prevention treatment, (2) managing temperature, (3) managing water, and (4) fertilizing; 7, mulching, transplantingseedlings and managing the field, namely (1) making a bed and mulching, (2) transplanting, (3) irrigating, (4) dressing foliar fertilizer, (5) managing water layers in the field, (6) weeding and (7) preventing insects. The method is mainly used for cultivating organic rice by mechanical mulching.

The nutritious rice with rich organic selenium and zinc is produced through diluting organic selenium and zinc chelating agent solution containing selenium in 3.56-7.12 g/kg and zinc in 45.30-67-94 g/kg in the amount of 200 g/mu with water in 150-300 times, spraying the diluted solution to rice leaf in the tillering period, booting period and grain filling period of rice for rice to absorb and convert, and other steps. The nutritious rice has selenium and zinc content of 0.070-0.270 ppm and 12-25 mg ppm separately, 2-10 times and 2-5 times higher than common rice product separately. The nutritious rice of the present invention may be used in producing public food for human body to replenish selenium and zinc.

The invention discloses a direct sowing culture method of rice. The direct sowing culture method comprises the steps: (1) selection of variety; (2) land preparation; (3) treatment of seed; (4) sowing; (5) management of emergence period; and (6) harvesting in time. The direct sowing culture method of the rice provided by the invention has the following advantages: (1) the working procedures are simple and convenient; human power is saved; and the effect is high; manpower can be saved by 45-70 persons per hour and square meter; the cost is saved by about 450 yuan per hour and square meter; and the labor productivity is raised by about 30%; (2) rice seedling raising and transplanting procedures can be reduced, thus mechanical sowing is convenient; (3) rice seedling bed is unnecessary, so that the planting area of grains and commercial crops can be expanded; and the cropping index can be improved; (4) root damage due to seedling pull-up and green turning process after transplanting can be avoided; the rice is tillered earlier, and the growth and development are faster; and (5) the cultivation characteristics of the direct sowing rice include developed root system, healthy and strong plant, strong disease resistance and large number of productive ear. The method is suitable for planting rice for villages.

The invention discloses an organic rice cultivation method, which comprises the following four steps of: 1) rice seedling raising, 2) fertilizer application; 3) reasonable close planting and 4) field management. The organic rice cultivation method is characterized in that the step of fertilizer application comprises the following two sub-steps of: 1) preparing and applying composted farmyard manure: evenly spraying microbial manure into farmyard manure, covering the farmyard manure with a plastic film, processing for 21 days to obtain the composted farmyard manure and then applying the composted farmyard manure in a paddy field; and 2) applying microbial manure: applying the microbial manure in the paddy field with water depth being less than 3cm and transplanting rice seedlings 15 days later after the microbial manure is applied. The organic rice cultivation method has the advantages that the heavy-metal ions and the chemical residues thereof in soil can be eliminated; the caking and the desertification of the soil can be gradually eliminated, the content of organic matters is improved, the pH (potential of hydrogen) is regulated, the granular structure is optimized and the breeding of harmful pathogenic bacteria is inhibited; the nutrients are sufficient; and a large quantity of nitrogen elements in air and various intrinsic elements in the soil are fully utilized, and low-carbon, environmental-friendly, sustainable, circular and high-efficiency agricultural economy is formed.

The invention discloses a selenium-enriched rice planting method. The method includes the following steps of land selecting, field finishing, seed treatment, sowing and seedling raising, seedling transplant, fertilizer management in the later period, irrigation treatment and selenium-enriched rice harvesting. Before seedlings are transplanted, selenium-enriched base fertilizer in a complex state is applied in the rice field, and a certain selenium source is provided for rice; at the beginning of panicle emergence and flowering of rice and grouting, the selenium-enriched compound fertilizer is applied in the rice field again, the selenium-enriched fertilizer is evenly distributed around roots of the seedlings in the growth process, the selenium in a complex state from soil is absorbed by the roots of the plants and then enters the inner cycle systems of the plants and participates in synthesis of protein through the path from stems to leaves to flowers and fruits, and finally, the selenium in an ionic condition from soil is stored in the seeds in the form of selenoprotein. The selenium-enriched rice tastes good and is high in nutrient matter content, and the content of the selenium of the rice can reach over 0.2 mg/kg and meets the national selenium-enriched standard.

The invention discloses a super rice strengthening and harm control cultivation method based on prevention and control of diseases, insects, lodging and pollution and aims to solve the problem that traditional rice cultivation methods easily cause diseases, insects, lodging and pollution. By harm control of cultivation environments, reducing disease and insect sources, harm control of seeds, timely sowing, cultivating to strengthen seedlings, reasonable close planting, filed management, effectively preventing and controlling diseases and insects, effective lodging prevention and the like, scientific management of the whole super rice cultivation process is achieved. Cultivation environmental conditions and technology favorable for normal growth of super rice and unfavorable for disease and insect generation are researched and created according to super rice cultivation features and generation features of diseases, insects, lodging and pollution, super rice growth conditions are improved effectively, and high quality and high yield of super rice are guaranteed. Tests show that an average of 53.2-59.6kg of high-quality rice is increased in each 667m<2> of super rice cultivated by the method, production value is increased by 138-155yuan, and evident economical, social and ecological benefits are achieved.

The invention relates to green rice cultivation production, in particular to a special fertilizer for green rice production, and preparation and application methods thereof. The fertilizer consists of urea-based nitrogen fertilizer, phosphorus fertilizer, potash fertilizer, medium elements and micro elements, and is prepared by the following steps: selecting solid fertilizer raw materials which may be solid particles or powder, adding the medium elements into humic acid or a humic acid salt in an amount which is 60 to 100 percent based on the mass of the medium elements, mixing, adding the micro elements, mixing and granulating by using a binder; and mixing the granulated medium and micro elements with the urea-based nitrogen fertilizer, phosphorus fertilizer and potash fertilizer. The rice fertilizer is applied once before the transplantation of rice as a base fertilizer, and top application is not required in the growth period of the rice. In the fertilizer provided by the invention, the amount and proportion in different release periods of the urea-based nitrogen fertilizer are determined in strict accordance with the nitrogen fertilizer demand characteristic of rice in different growth periods to form a five-stage supply speed for fertilizer nitrogen, and thus, the loss of nitrogen fertilizer is controlled obviously.

The invention discloses an organic scented rice production technology. The production technology comprises the following steps of seed selection, seed processing, seedbed production, seeding, seedbed management and the like, so that produced organic scented rice is full in grain, stable in quality, safe and nonhazardous. The organic scented rice production technology is scientific, reasonable, simple, easy to operate for a farmer, simple in management, suitable for cultivation in large scale, and capable of improving social benefits, economic benefits and ecological benefits of the organic scented.

The invention discloses a method for cultivating hybrid rice, which comprises the steps of breeding improved varieties, raising sturdy rice seedlings, field cultivation and prevention and treatment for main diseases and pests. According to the method, the conservation of soil, fertilizer and water, the resistance for cold, drought, lodging and disease and pest and other functions of the soil are improved; and the applying quantity of chemical fertilizer is reduced on the premise of ensuring the national food security, therefore, the cost is saved and the farmer's income is increased, and energy is saved, environment is protected and the agricultural sustainable development is promoted for the country.

Provided is a recycle mixing type rice field culture method. According to the method, a rice field and fresh water resources are utilized for culturing. The method comprises the following steps of arrangement of the rice field, installation and adjustment of facilities, disinfection of the clean field and water fertilizing, rice planting, loach and Chinese soft shell turtle stocking, edible frog throwing, loach and edible fog harvesting, rice harvesting, water entering to flood the field, freshwater shrimp autumn seedling stocking, freshwater shrimp multiple fishing and coming into the market of freshwater shrimps, freshwater shrimp and Chinese soft shell turtle capturing, and ploughing and field drying, wherein the arrangement of the rice field comprises the excavation of culturing ditches, and trimming of field ridges. By the adoption of the method, rice-fish culture and freshwater shrimp autumn seedling and Chinese soft shell turtle mixed culture are organically and cyclically combined, the problems that an empty rice field in winter is not utilized, a water-phase food chain is simple, the mutually beneficial level of rice and fish is low and the bird prevention and the pest removal are low are solved thoroughly, the recycle and safe and efficient output of the rice field are ensured, the significant increasing of the benefits of rice field culture is achieved, and the method has the advantages that the culture process is easy to operate, the culture cost is low and the culture safety is high.

The invention discloses a rice field ditch integrated ecological high-value rice and soft-shelled turtle planting and breeding method which comprises the following steps: 1, ruralizing a rice field and installing fences; 2, plowing the rice field; 3, transplanting rice; 4, putting soft-shelled turtles in the rice field and raising the soft-shelled turtles; 5, conducting field management; and 6, harvesting the rice and the soft-shelled turtles in good time. The method has the advantages that: 1, the foundation works of the rice field is optimized without reducing the area of the rice; 2, the foundation works of a rice ditch is optimized without destroying the structure of the rice field; 3, the landscape of the rice field is optimized to provide a good growth environment for the soft-shelled turtles; 4, a ladder type culture method is adopted to increase the planting and breeding density; and 5, the economic benefit of the rice field in a unit area is greatly increased.

The invention relates to a cultivating technique of cross bred lobster in rice field and pond. The technique is the producing manner which utilizes the shallow water environment in the rice field and is supplemented by artificial measures to plant the rice and cultivate the lobster to increase the profit of the unit rice field area. Since the freshwater cross-bred lobster has low requirements on water and the cultivating place, and fish culture in paddy field is a tradition in a plurality of areas in China, and the economic profit of the unit rice field area can be effectively increased by popularizing the culture of the freshwater cross-bred lobster in the rice field when the profit of fish culture is dropped. The culture of the freshwater cross-bred lobster in the rice field can facilitate weeding and pest eliminating in rice field and save fertilizer and pesticide; and the rice yield of the rice field raising the lobster can be increased by 5percent to 15percent generally. In some areas, in particular the areas of waterlogged lowland, winter macerated fallowland and cold water paddy field, where only single cropping is allowed, the mode of the rice planting and the freshwater cross-bred lobster cultivation in turn is adopted and the economic profit is remarkable.

The invention provides a method for planting cadmium-reduction and selenium-increase rice. The method comprises the following steps of (1) obtaining the content of total cadmium in soil, and judging whether the content of cadmium in rice produced by the preceding crop of rice which is planted in the soil exceeds the standard or not; (2) by utilizing the results obtained in step (1), judgment results, and setting value of zinc and cadmium ratio, planting according to a cadmium-reduction standard control procedure table, wherein the planting operation comprises the steps of (21) applying 0.25-1kg of zinc fertilizer per mu as a base fertilizer, and applying selenium fertilizer into cavities; (22) spraying composite selenium fertilizer to the leaves in the setting growth period of rice. The planting method has the advantages that on the basis of comprehensively considering the content of total cadmium in the soil and judging whether the content of cadmium in the rice exceeds the standard or not, the cadmium-reduction and selenium-increase operation is performed, so the content of cadmium in the rice can meet the standard; the content of the selenium in the rice is improved, and the cadmium-reduction and selenium-increase purposes are realized. The invention also provides selenium-enriched rice and selenium-enriched rice bran, wherein the selenium-enriched rice and the selenium-enriched rice bran are processed by the rice which is obtained by the rice planting method.

The invention relates to method for increasing the yield of a plant grown under conditions that cause periodic oxidative stress in said plant, comprising the step of growing a seedling, tissue culture or plantlet into a plant, and further comprising the step of manipulating said plant or the environment of said plant such that an increase in the rate of respiration and/or protein turnover in said plant due to said periodic oxidative stress is intentionally prevented during the early ontogeny of said plant.

The invention discloses a drip irrigation dry-farming planting method under a rice direct seeding film, which belongs to a crop planting agriculture method. A timely seeding operation is carried out after the preparation before seeding is finished; the seeding operation is as follows: the operations of drip irrigation zone paving, film covering, punching, hole seeding and soil covering on a hole are accomplished by one time by a drip irrigation tube-paving film-paving fine seeder under the film; the drip irrigation zone is arranged on the lower surface of a plastic film and is connected with a water-carriage system; and timely and proper water dripping and fertilizing are carried out according to the growing demand of the crops. The drip irrigation dry farming planting method can be applied to save water by 60 to 70 percent, save the fertilizers by 30 percent, have high degree of mechanization, save labor, reduce the field management and reduce the pesticide pollution.

The present invention discloses a Chinese milkvetch cultivation method in rice field, and relates to a Chinese milkvetch cultivation and utilization technique under the condition of paddy field rice-green fertilizer rotation cropping system. It is characterized by intersowing Chinese milkvetch seeds in the rice field, and adopting a series of measures of channelling and discharging water after the rice is harvested so as to implement said invention.

The invention discloses a method for directly seeding rice, which comprises the following steps of: preparing soil; preparing a slag fertilizer; soaking seeds and accelerating germination; digging holes and seeding in a dry field; weeding; fertilizing in a land for growing field crops; thinning; and preventing and controlling plant diseases and insect pests. Since the method for directly seeding the rice directly digs holes and seeds in the field, the method can ensure that rice in a dry area grows normally by using a little amount of water before the head sprouting process of the rice, achieves good drought-resisting and water-saving effects, eliminates the transplanting step, avoids damaging root systems of the rice, strengthens the tillering capacity of the rice, achieves high yield, simplifies the working procedure, saves labor force, has low production cost, high efficiency and convenient operation, and can be widely used for planting rice in mountain areas, hilly areas, easily droughty areas and water-lacking dead angles of pieces of paddy fields.

The present invention discloses a kind of nutritious rice with rich organic selenium and zinc and its production method. The nutritious rice with rich organic selenium and zinc has organic selenium content of 0.16-1.12 mg/kg and zinc content of 0.5-1.5 mg/kg. The nutritious rice with rich organic selenium and zinc is made of paddy with rich organic selenium and zinc, and the paddy with rich organic selenium and zinc is produced through applying selenium and zinc enriched fertilizer compounded with selenite, zinc fertilizer, organic nitrogen fertilizer, phosphate fertilizer and potash fertilizer and multifunctional trace elements during paddy growth.

The invention belongs to the technical field of fertilizer-saving high-yield culture in agricultural production and relates to a method for increasing yield of double cropping rice by turnover and fertilizer saving of Astragalus sinicus L. and straw in a rice field. Specifically, the method includes that during growth of early rice, green Astragalus sinicus L. is overturned and pressed to return to the field so as to replace part of nitrogenous fertilizer, and during growth of late rice, straw of the early rice is returned to the field to replace part of nitrogenous fertilizer, and purposes for nitrogenous fertilizer conservation and high yield are achieved in the integral production cycle of double cropping rice. The method solves the problems that areas of vacant fields in winter are enlarged, the rice field is deteriorated, ecological cost for rice production is increased, and fertilizer utilization rate is seen low and the like in a rice cropping system of southern China. The method is a cultivating technology high in yield, nitrogenous fertilizer saving and lower in N2O emission and provided for increasing yield of the double cropping rice, reducing fertilizer investment and increasing fertilizer utilization rate.

The invention relates to a soilless seedling raising method of paddy rice. The traditional soilless raising seedling technology of the paddy rice is immature, which results in phenomena that the quality of seedlings is poor, the seedlings do not grow, roots do not twist, some place is not suitable for transplanting seedlings, and the seedling death usually happens. The invention comprises steps of (1) proportioning substrates: taking and uniformly mixing 1-3 jin of pearlite powder, 1-5 jin of grass carbon, 1-5 jin of fermented plant straw powder, 1-5 jin of fermented livestock feces and 20 grams of slow-release fertilizer; (2) adding a moisture preserving agent and an adhesive into the prepared substrates; (3) sowing seeds; and (4) scattering 0.5 to 0.8 cm of burnt coal ash on paper with air vents in step (3), adjusting pH value of the burnt coal ash to 4.5 to 5.5, watering the coal ash, and covering the coal ash with a moisture preserving land layer, applying a liquid fertilizer to seedlings 8 to 12 days later after the seedling growth, applying the liquid fertilizer to the seedlings again 8 to 12 days later, and carrying out regular seedling management, wherein a non-woven ventilation film is adopted as the moisture preserving land layer , and the fertilizing amount of each time is 15 to 25 g/m<2>. The method in the invention can be used for raising paddy rice seedlings.

The invention belongs to the field of rice cultivation, and particularly relates to a cultivation method suitable for no-tillage rice in a fixed compartment of an oil crop-medium rice field. The cultivation method comprises the following steps that: (1) rice seeds are coated by using dry-raised nurse, thick mud and dry fine soil serving as coating agents, wherein the components comprise 7.9 to 12.5 percent of dry-raised nurse, 25 to 26.3 percent of rice seeds, 12.5 to 13.2 percent of thick mud with 37 percent of water content and 50 to 52.6 percent of dry fine soil with 3 percent of water content in percentage by mass; the rice field is finished as required and the soil moisture is kept; and keeping the seedling age at 15 to 18 days; (2) the compartment width of the oil crop field is 1.2 meters, the width of the ditch is 0.3 meter, and the depth of the ditch is 0.25 meter; the rape seedlings are applied to the field; a ternary compound fertilizer of which pure nutrients comprise 15 percent of N, 15 percent of P2O5 and 15 percent of K2O is applied, and 30 kilograms of pure nitrogen is applied in each mu; 5.80 kilograms of zinc is applied in each mu; and 4.8 kilograms of boron fertilizer is applied in each mu, and the ditch is kept full of water; (3) rice seedlings with 50 to 100 grams of soil in each seedling in 15 to 18 days are directionally thrown according to a row space of 20 centimeters; and (4) the ditch is kept with water and the compartment surface has no water after throwing the seedlings till the heading stage, and dry and wet alternated cultivation is adopted from the grain filling stage to the maturation stage. Compared with the conventional method, the yield is averagely increased by 8.7 percent.

The invention discloses a complete wheat straw returning mechanical rice seedling planting method, which comprises the following steps of: reserving stubbles of 10 to 30 centimeters when the wheat is harvested, cutting straws to the length of 5 to 8 centimeters, and uniformly scattering the cut straws on the surface of a field; applying a base fertilizer, irrigating water for 5 to 6 centimeters to soak the field for 2 to 3 days, and embedding grass and preparing the field for two times of transverse and vertical operations through a medium tractor and a grass embedding rotary cultivator, wherein the embedded depth of the wheat straws returned to the field is 5 to 10 centimeters; settling for 2 to 3 days after grass embedding and rotary tillage operations, and then mechanically planting seedlings, wherein the mechanical seedling planting water depth is 1 to 1.5 centimeters, and the seedling planting depth is within 1.5 centimeters; and after mechanical seedling planting, performing corresponding water, fertilizer and disease, insect and weed management at the early stage, the middle stage and the later stage respectively till the rice is mature. The straws are totally left in the rice field after the wheat is harvested, and the straws are totally changed into available fertilizer by natural decomposition, so the method avoids straw burning, purifies the air, protects the environment, improves the physical and chemical properties and aggregate structure of the soil and improves the organic substance content of the soil.

The invention relates to a rice cultivation method for effectively reducing the cadmium content of unhulled rice, and belongs to a rice cultivation method. The technical problems that rice cultivated through an existing rice cultivation method is high in cadmium content and low in yield are solved. According to the technical scheme, the rice cultivation method includes a conventional rice cultivation method and is characterized in that in the tillering stage, mixed fertilizer comprising quick lime and plant ash is broadcast to adjust the pH value of soil to be larger than 6 and smaller than 7.2 so that cadmium absorption of seedlings can be reduced; in the first-earing stage, leaf fertilizer containing selenium (Se) is sprayed, so that selenium absorption of the seedlings particularly young ears is increased, selenium-rich rice is produced, and cadmium absorption of the unhulled rice is restrained. The rice cultivation method is mainly used for rice cultivation.

The invention discloses a cultivation method for drily direct-seeding rice. The cultivation method comprises the following steps: A. dry soil preparation: drily ploughing and preparing the land, and raking the land thoroughly; B. application of fertilizer: during the whole growth period, the dosage of nitrogen phosphorus and potassium being 10-13 kg of N, 4-6 kg of P2O5 and 5-8 kg of K2O per mu (a unit of area, equal to 0.0667 hectares), wherein the nitrogen phosphorus and potassium in the base fertilizer is 40%, 100% and 50% of the planned dosage in the whole growth period; C. seed selection and coating: selecting high-yield large-panicle type or intermediate form type of rice seeds, utilizing a special dry cultivation seed coating agent to be mixed with the seeds; D. sowing: sowing the seeds in the last twenty days of April and the first ten days of June at a seed amount per mu of 1.5-4.0 kg; E. weed control: utilizing a weed control method of removing the weed, utilizing a herbicide and supplementing the rice seeds; F. water management: taking rainwater cultivation as a main manner from the seedling emergence period to a three-leaf and one-core period, and conducting flood irrigation from the three-leaf and one-core period to two weeks before harvesting; G. integrated control of diseases and pests. With adoption of the high-yield and high-efficiency cultivation technology for the drily direct-seeding rice, the average yield per mu is 608.7 kg, which is not lower than the conventional transplant planting pattern; furthermore, the moisture production efficiency and the grain nitrogen production efficiency are both obviously higher than that of the conventional transplant planting pattern.

The invention discloses a method for producing selenium-rich ecological rice. The method comprises the following steps of: adding water into a selenium-rich organic fertilizer for diluting by 600 times to form selenium-rich organic fertilizer solution; soaking rice seeds by using a soaking medicament for 12-18 hours, soaking the seeds by using the selenium-rich organic fertilizer solution for one day, accelerating germination and sowing; during fertilizer application at the seedling stage of paddy rice, applying the selenium-rich organic fertilizer to a seedling bed in an amount of 20-50kg/100m<2>; at the breaking stage and milk-ripe stage of the paddy rice, spraying a selenium-rich organic fertilizer which is diluted with water by 700 times onto the leaf surfaces of paddy rice once respectively; and harvesting ripened paddy rice. According to the selenium-rich rice prepared by the method, the content of selenium is 0.2mg/kg, and the content of zinc is 15mg/kg, so that the standard of superior selenium-rich rice is reached; and meanwhile, the self-made selenium-rich organic fertilizer is prepared by adopting a reasonable proportion and a reasonable preparation process, the synergetic effects of the element selenium and other elements such as zinc, silicon, ferrum, molybdenum, aluminum and the like are used fully, soil pollution can be prevented effectively, and the soil structure and quality are improved.