779 results about "Rice farming" patented technology

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 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 belongs to the technical field of agricultural plantation, and specifically discloses a method for planting high-SOD-content rice, and also discloses a fertilizer for planting high-SOD-content rice. The method for planting high-SOD-content rice uses a silicon calcium magnesium fertilizer as a base fertilizer of a paddy field, and comprises: spraying a rice tillering stage fertilizer rice tillering stage, spraying a rice flower promoting stage fertilizer in a rice flower promoting stage, spraying a rice flower maintaining stage fertilizer in a rice flower maintaining stage, spraying a rice heading and flowering stage fertilizer in a rice heading and flowering stage, and spraying a rice filling stage fertilizer in a rice filling stage. The method for planting high-SOD-content rice promotes synthesis of four kinds of enzymes of SOD, CAT, POD, and GSH-Px in a rice growth process through applying different fertilizers according to growth characteristics of each growing period of rice, and the enzymes move and transfer into rice grains, and finally, rice products in high-content-SOD and other four enzymes are obtained.

The invention relates to the technical field of a paddy rice planting method, in particular to an environment-friendly nuisance-free paddy rice planting method. The method comprises the following steps: tilling a field, that is, tilling a field for planting the rice and applying a biogas fertilizer to the paddy field; preparing seeds and raising rice seedlings, that is, selecting a high-quality rice variety with compact plant shape, strong resistance and high yield, then sterilizing and soaking the seeds for seeding use, or soaking the seeds and raising the seedlings for transplantation; seeding the rice seeds or transplanting the raised rice seedlings; driving green ducks which are 18-20 days old or adult ducks to the paddy field within 25-40 days after the rice seedlings come out or 10-20 days after the rice seedlings are transplanted by throwing; driving the ducks from the paddy field or feeding the ducks in a duck shed in the paddy field to prevent the ducks from eating immature rice grains and resulting in yield reduction when the rice seedlings are in a milk ripe stage and a dough ripe stage; and harvesting the rice grains after the rice grains become mature. In cultivation and field management, the method helps scientifically manage various links of paddy rice growth, effectively control pest damages to the paddy field by feeding the ducks in the paddy field in different rice growth periods, thus promoting ecological balance, controlling pesticide pollution, ensuring good agricultural environment and promoting yield increase of the rice.

The invention discloses a method for planting rice in a Procambarus clarkii culture pond. The method comprises the steps of carrying out standard pond reconstruction, carrying out pre-culture preparation, carrying out juvenile Procambarus clarkii stocking, carrying out high-straw rice transplanting, carrying out planting and culturing management, carrying out commercial Procambarus clarkii culturing and fishery and carrying out high-straw rice harvesting. According to the method, rice planting is introduced to aquaculture ponds firstly, the Procambarus clarkii culture pond is subjected to simple engineering reconstruction, Procambarus clarkii, rice and water plants are organically combined so as to realize the mutualism of the Procambarus clarkii and the rice, the Procambarus clarkii is used for carrying out soil loosening and insect damage removing on the rice, and the rice absorbs nutrient elements, such as N and P, in water, so that the water for culture is purified, habitation and shelter sites are provided for the Procambarus clarkii, a good growth environment is created for the Procambarus clarkii, and the quality of the Procambarus clarkii is improved. The method disclosed by the invention is simple and convenient in operation and is suitable for being popularized to shrimp and crab culture ponds, the whole course of production has no need of medication, produced rice and Procambarus clarkii are high in quality, and the economic benefit increased per mu is more than 1,500 RMB, so that the method has great social and economic benefits.

A conservation tillage implement having three or more rows of individual coulter wheel assemblies laterally spaced apart and removably mounted on a cultivator frame, a coulter wheel assembly in a given row being staggered with respect to the coulter wheel assemblies in a longitudinally adjacent row. The coulter wheel assemblies may be laterally adjustable and may be mounted to the cultivator frame using a mounting means that permits rotation about a vertical axis. The coulter wheel assemblies may comprise a coil spring having a horizontal spring axis to permit upward deflection in response to impact with an obstacle. Leveling attachments may optionally be mounted to the cultivator frame, along with additional field working tools. The implement is used in the management of crop residue as part of a minimum tillage strategy. The implement is particularly resistant to plugging and can be operated at high speeds without undue damage upon impact with obstacles. Advantageously, the implement can be operated in standing water, as found in the growing of rice.

The present invention belongs to the field of agricultural cultivation technology, and particularly relates to a high-yield cultivation method of organic selenium-enriched rice. The method includes the following steps: A, selecting rice seeds and sterilizing the rice seeds; B, arranging rice seedling beds; C, sowing the rice seeds and cultivating rice seedlings; D, preparing a large field; E, transplanting the rice seedlings; F, managing the field; and J, harvesting the rice. Insect disinfestation for the rice seeds is carried out using Tripterygium wilfordii extracts; meanwhile, Tripterygium wilfordii extracts are used to dissolve the selenium and biological pesticides in the rice production process, and further improvements on the prevention and control of plant diseases and insect pests are realized in the overall growth process of the organic selenium-enriched rice. Instead of chemical fertilizers, bio-organic fertilizers are used in the rice cultivating process, which ensures a variety of nutrients required in the rice cultivating process and improves the rice yields. The rice yields and the selenium content of the organic selenium-enriched rice are higher than those of rice planted with traditional cultivation technology, and pesticide residues are significantly lower than that of the rice planted with the traditional cultivation technology.

The invention pertains to the field of agricultural cultivation and relates to a rice planting method. The method comprises following steps: 1), selecting rice seeds and immersing seeds with seed immersion liquid at the temperature of 35 to 37 DEG C for 12-16 hours; 2), spraying seedling-stage fertilizers; 3) transplanting seedlings to large fields scatted with planting base fertilizers when seedlings grow to the five-six-leave period; 4), dressing tillering fertilizers when rice seedlings start to tiller; 5), dressing flowering fertilizers when rice seedlings start to blossom; 6), dressing grouting fertilizers and applying leaf fertilizers when rice seedlings start to grout; and 7), harvesting. The rice planting method has following beneficial effects: the rice planting method is highly targeted and used for applying fertilizers to all growth periods; in combination of seed immersion liquid, the germination period can be shortened in order to quicken the growth of rice; stress resistance of rice is improved; the period from germination to blossom can be shortened; the flowering period and the production period can be prolonged; in the tillering period, tiller number can be increased by tillering fertilizers; flowering fertilizers are applied during the flowering period in order to improve successful rate of pollination; by dressing grouting fertilizers and leaf fertilizers, grouting rate can be greatly increased in the grouting period in order to improve yield and rice grains are full.

The invention provides a full-biodegradation mulch film for rice planting and a preparation method thereof. The full-biodegradation mulch film for rice planting comprises an inner layer, a middle layer and an outer layer, and comprises ingredients such as PBAT, PLA, PHA and PPC; the inner layer, the middle layer and the outer layer of the full-biodegradation mulch film are prepared by a three-layer co-extrusion technology. The full-biodegradation mulch film for rice planting and the preparation method at least have the following advantages that the rice growth period is shortened; the rice yield is increased; the rice quality is improved; the manual weeding cost is reduced; the pesticide consumption is reduced; the pesticide residue is reduced; the use cost of a user is reduced through thickness reduction; meanwhile, the problems that the existing full-biodegradation mulch film has poor hydrolysis resistant performance, and is not suitable for rice planting conditions are solved by adding the functional auxiliary agents through the three-layer co-extrusion process. The degradation performance controllability is high; the growth requirements of the crops can be met. The price is about 5 percent lower than that of abroad similar products.

The invention relates to a planting method for organic rice. The method mainly comprises: soaking seeds, accelerating germination, raising rice seedlings, and transplanting rice seedlings 20-30 days before local rice planting time; in field preparation, turning under green manure, base fertilizer including biogas manure, fully decomposed yard manure and / or fully decomposed cake fertilizer; 10-20 days after rice transplanting, after seedlings stand, stocking ducklings, in peak of outbreak of rice planthoppers, adding a second batch of ducklings, in a rice heading flowering period, taking back the ducklings; in fertilization aspect, in addition to using green manure cooperating with farmyard manure base fertilizer, and dressing farmyard manure, the rest using wood vinegar; in pest control aspect, using field light traps and artificially propagating parasitic wasps, alternatively spraying the wood vinegar and garlic pepper solution. The method solves problems that yield of organic rice planting is not high, rice quality is not good, and plant diseases and insect pests are severe. The method is successful in plantation of ''sticky fragrance'', ''rice fragrance'', ''beautiful fragrant sticky'', and a Japan introduced variety ''Koshihikari''.

The invention relates to an ecological paddy-field soft-shelled turtle culture method, which comprises the steps of paddy field selection and preparation, soft-shelled turtle fry stocking, feeding and daily management and common soft-shelled turtle disease prevention and control. During the paddy field selection and preparation, a paddy field which is in a low-lying terrain, has a good water source condition and smooth water flow and is convenient to drain and irrigate is required; a soft-shelled turtle trench is excavated in the paddy field, the upper width of the soft-shelled turtle trench is 3m, the bottom width and the depth of the soft-shelled turtle trench are 1.5m, the length of the soft-shelled turtle trench is determined according to the area of the paddy field and the length is preferably to account for approximately 20 percent of the total area of the paddy field; and a sand beach is built in the center of the paddy field, the length of the sand beach is 5m, the width of the sand beach is 1m and the sand beach is 0.8m higher than normal water level. The invention provides an ecological three-dimensional rice planting and soft-shelled turtle culture technical operation line, which is mainly based on rice planting and takes soft-shelled turtle culture as auxiliary. On one hand, the paddy field provides a good place for the growth of the soft-shelled turtles. On the other hand, the excrement of the soft-shelled turtles and food debris are used as organic fertilizers for rice. When the rice absorbs the fertilizers and grows, an effect of purifying an impoundment is taken, the soft-shelled turtles can loose soil in the paddy field and catch injurious insects, the quality of the soft-shelled turtles is effectively improved and the economic benefit is improved.

The invention discloses a paddy rice planting method of selenium-enriched rice. A paddy rice planting method of pearl rice comprises the following steps including seed selection and treatment, seedling culture, rice field treatment, rice transplanting, seedling checking, seedling complementing, field management and harvesting. The rice planting method has the advantages that the reasonable planting steps are used; the rice growth environment is improved; the yield and the quality of the rice are favorably improved; the rice can realize bidirectional absorption in the growth process through selenium-enriched nutritional agents and selenium-enriched leaf fertilizers; the selenium content of the rice is favorably improved, so that the market competitiveness of the product is improved; the economic benefits of planters are increased.

A rice and lobster co-culture method includes a rice planting part and a lobster breeding part. The lobster breeding part includes the steps of (1) rice field modification; (2) juvenile shrimp culture; (3) adult shrimp breeding; (4) parent shrimp putting; (5) adult shrimp fishing, supplementary juvenile shrimp putting and parent shrimp retention. The rice planting part includes the steps of (1) rice cultivation; (2) rice field management; (3) field drying; (4) rice pest and disease control; (5) draining and harvesting. Compared with an ordinary rice and lobster co-culture mode, the morbidity frequency of lobsters can be reduced to 45 days or so from 7-10 days, the disease control cost is reduced by 150 yuan / mu or so, and the survival rate can be increased to 80% or above from 30-40%.

An organic fertilizer for plantation of paddy rice is prepared from the following raw materials, by weight, 10-15 parts of corn straw, 15-20 parts of bean straw, 4-7 parts of indolebutyric acid, 25-30 parts of potato straw, 30-35 parts of rape-seed cake, 5-7 parts of silicon fertilizer, 20-30 parts of silicate, 4-8 parts of potassium chloride, 3-9 parts of monoammonium phosphate, 4-8 parts of talcum powder, 3-5 parts of microbial strain, 15-25 parts of livestock excrement, 10-20 parts of urea, 3-9 parts of ammonium bicarbonate, 5-9 parts of zinc sulfate and 7-9 parts of an additive. The additive is prepared from the following raw materials, by weight, 10-15 parts of an organic material, 8-10 parts of trace elements, 0.3-0.5 part of an antimicrobial active component, 4-7 parts of a sustained release agent, 3-5 parts of humic acid and 2-3 parts of a virucide for plant. The invention provides an organic rice fertilizer which has advantages as follows: dosage of a fertilizer is minimized, nutrients are balanced, and soil quality is improved. With the additive and a common fertilizer used together, utilization rate of the fertilizer can be effectively raised, and the soil environment can be improved.

The invention discloses a farmland ricefield eel cultivating method. Ditching and ridging are carried out on a farmland meeting the requirements of planting taro, corn or paddy, the width of ridging channels are determined by narrow bands and wide bands at intervals, the depth of the ridging channels are determined by shallow ridges and deep ridges at intervals, and the ridging channels are mutually communicated. 1-2 soil slops are built on each ridge every other 25-100 m. Crops are planted on the ridges, ricefield eel seeds are thrown in the channels for cultivating ricefield eels, and angleworms are placed on the ridges for feeding the ricefield eels. In the invention, an innovated mode and technology for planting crops and cultivating ricefield eels is constructed, the problem of low income of the traditional ricefield eel cultivating method and pure crop planting of the farmland is solved, the cultivated land resource of the farmland can be sufficiently utilized, and the ecological environment of the farmland is improved. By adopting the technology, farmers can obtain benefits for many years after investing once.

A method for identifying rice blast resistance of rice comprises the steps of scissoring three rice stems in a large bract period from a rice growing field, bringing the rice stems back to a laboratory, scissoring 2cm from the upper portion of each stem section and 5-6cm from the lower portion of each stem section to obtain one rice stem with the whole length of approximate 7-8cm, putting the three rice stems into culture dishes with two layers of filter paper, adding sterile water of 1mL into each culture dish, washing cultivated rice blast fungus spores with the sterile water, obtaining concentration of 106 pcs / ml, dropping spore suspending liquid of 8 muL to stem section sites of each rice stem through a liquid moving gun, putting the culture dishes into a illuminating incubator at the temperature of 26 DEG C, wrapping the culture dishes with transparent films to keep humidity in the culture dishes, cultivating for ten days in light and dark alternating modes to survey disease conditions, dividing survey disease levels into three levels, regarding the first level as disease-resistant cultivars, regarding the second level as susceptible cultivars, and regarding the third level as highly susceptible cultivars. The method optimizes the concentration and inoculation amount of inoculated rice blast fungus spores and establishes simple, convenient and accurate grading standards.

A method for producing ecological rice includes such steps as sterilizing seeds by immersing them in water at 50-53 deg.C for 10 min, immersing in water at ordinary temp for 5-7 days, preparing culture medium from rice husk and / or pulverized rice husk through biological fermenting and mixing with nutritive soil and liquid regulating acidity, sterilizing, culturing rice seedlings, transplanting, irrigating in different modes at different growth phases, and raising fish fry in the paddy field for removing weed and pests. Its advantages are high yield and quality of rice and no environmental pollution.

The invention relates to a fruit-vegetable enzyme and a preparation method. The fruit-vegetable enzyme is prepared by using fruit, vegetables, sugar and water as main raw materials for fermentation, the fruit include apple, banana, shaddock, shaddock peel and hawthorn, and the vegetables include potato, Chinese cabbage, garlic, onion and pepper. The fruit-vegetable enzyme can provide nutritional substances needed for paddy to grown and can play a role in inhibiting bacteria and expelling parasite. The invention further provides application of the fruit-vegetable enzyme in paddy cultivation and a method of using the enzyme to cultivate paddy. By the application and the method, consumption of chemical fertilizer and pesticide during paddy planting can be lowered. The invention further provides application of residue of the fruit-vegetable enzyme in improving paddy field soil. By the application, the paddy field soil can be improved remarkably.

The invention discloses a rapid comprehensive treatment method of saline-alkali beaches, specifically comprising the following steps: 1. draining saline water; 2. mowing spartina aherniflora and reeds and crashing the rootstocks of the spartina aherniflora and the reeds; 3. allocating a complete irrigation system and introducing freshwater; 4. working soil; 5. washing salt with freshwater and weeding by waterflooding; and 6. leveling soil. In the method, the spartina aherniflora is eliminated by mowing, breaking up, waterflooding and the like, and the problem of reducing the salinity is simultaneously solved in a shorter time by means of draining the original saline water, breaking up multiple times before and after steeping field, strictly separating water inlet and water drain and avoiding mutual doping of freshwater and saline water. Tests have been done on 15,000mu beaches on the agricultural base in Binhai Dongtan, Pudong New area, Shanghai, 12,000mu saline-alkali beaches have the conditions of planting rice within 8 months, and no reeds, spartina aherniflora harm and salt harm occur in the period of rice growth and the rice grows well, thus realizing high yield and bumper harvest and setting a precedent for successfully planting rice in large area on the beaches from which sea water receded in those years.

The invention discloses a planting method of paddy rice, and belongs to the field of germination accelerating of the paddy rice by seed soaking. The method for germination accelerating of the paddy rice by seed soaking includes a seed selection, seed soaking, seed washing and germination accelerating. The seed selection is as follows: using clean water to wash paddy rice seeds for 3-4 times, and then removing mouldy grains, insect grains and empty grains to obtain healthy paddy rice seeds; the seed soaking is as follows: soaking the selected seeds into an agent for 14-24 hours, wherein soaking large-grain seeds for 18-24 hours, and soaking small-grain seeds for 14-18 hours; the seed washing is as follows: using the clean water to wash the soaked seeds for 3-5 times so as to thoroughly wash away the drug flavor of the agent for the seed soaking and adhesion matters on the seed surfaces, dragging the seeds to drip dry the water on the seed surfaces; and the germination accelerating is as follows: using hot water of 44-46 DEG C to wash the dragged seeds for 3-5 minutes so as to make the seed bodies warm, and then using a bamboo crate for heat-insulation germination accelerating. The method is not only simple to operate, but also is beneficial to improvement of the germination accelerating rate of the paddy rice so as to promote the healthy growth of the paddy rice in a seedling period.

A band-type rice and wheat interplanting method featuring the all of straw and stalk are buried in field includes preparing the wheat bands (15-25 cm in width) and spacing bands (35-45 cm in width), sowing wheat in the autumn while applying the retted rice straw to the spacing bands, ploughing the spacing bands in the winter, applying organic fertilizer in the spring, harvesting wheat but leaving high stubbles, filling water to immerse soil, transplanting rice, applying the broken wheat straw in the spacing bands, and ploughing. It can increase the yield of rice by 15%.

The invention relates to a hybrid rice single-parent dense planting machine transplanting cultivation method. Hybrid rice seeds which do not germinate are removed through a photoelectric color sorter, and germination rate of sown seeds is larger than or equal to 98%. A manual seeder or a printing seeder is adopted to position single-grain seeds for seedling raising, a rice transplanter is used for high-density single-parent seedling machine transplanting, transplanting density is 24-25 thousand holes for double cropping rice and is 18-20 thousand holes for single cropping rice, and high-yield management measures are adopted for field management after greening up. By the method, seed cost can be saved, strong seedlings can be cultivated, yield can be increased remarkably, and comprehensive benefit of rice planting can be increased.

The invention relates to a method for continuously controlling insect pests and weeds of field quarter paddy through intercropping two batches of ducks. Ten days before the first batch of ducks are freed in the field, the second batch of ducklings are bred so as to substitute the first batch of ducks to control the insect pests and weeds, and the two batches of ducks cohabitate in the paddy field for about 10 days and are kept during the period from a paddy seedling establishment period to a mature period all the time. Under the condition of no control methods of pesticide and herbicide application, after the method is adopted, both the insect pests and weeds can be obviously reduced from the seedling establishment period to the mature period of paddy planting, so that a function of continuously controlling the insect pests and weeds of the paddy is exerted during all the process, the paddy yield can be increased, two batches of ducks are bred through one quarter paddy planting season, and the economic benefit is higher than conventional duck and paddy co-production.

The invention relates to a technology of aquiculture and crop planting, particularly to a rotation method of breeding terrapins and planting rice. The method is as follows: a pond is formed by surrounding a large area of field to breed the terrapins; the rotation way of breeding the terrapins for three years and planting the rice for one year is adopted; excretions of the terrapins and food scraps are utilized to serve as organic fertilizers of the rice, so as to enhance the growth of the rice by absorbing the fertilizers, simultaneously purify the surrounding pound; when the rotation is carried out, the application of chemical medicines and fertilizers is unnecessary, thereby realizing the organic breeding of the terrapins and rice; under the precondition of not spraying chemical medicines, a fly net is laid up for guarding against the plant diseases and insect pests of the rice, so as to change the prior problems of the low earth utilization ratio, the difficulty of defending against the plant diseases and insect pests, and the recurrence of terrapin diseases, thereby improving the quality of the terrapins and rice, achieving the standard of organic farming products, and increasing the economic benefit.

A rice planting method for obtaining rice planted in a field with frogs belongs to the technical field of the stereo ecological effective production combining scientific planting and culturing. The rice planting method is as follows: frogs are cultivated while rice is planted in the rice field; specific measures are as follows: a waterhole is arranged at a water inlet of the rice field; a ditch isarranged along the periphery of ridge of the rice field; a plastic thin film with 1.2m height surrounds a defensive wall which preventing the frogs from escaping on the periphery of ridge of the ricefield; mound for the wintering of the frogs is arranged in the rice field; after rice is planted in the rice field, the water depth needs to be kept over 3cm; about five thousands of frogs are cultivated per acre. Growing environment of the rice is used for cultivating the frogs which prey on pests and other insects growing in the rice field; excrement of the frogs is used as fertilizer of rice growing. Water body resources and ecology environment of the rice field are fully utilized by cultivating the frogs in the rice field, thus being capable of achieving effects of rice and frog intergrowth and mutual benefit, efficiency improvement and energy consumption. The rice planted in the field with the frogs is pure green superior rice with high grade; and the frogs have very high economicalvalue.

The invention relates to an intensive juvenile crab paddy field aquaculture mode, which comprises juvenile crab aquaculture paddy fields which are connected together. Each juvenile crab aquaculture paddy field comprises a canal, a water inlet pipe, a ridge, rice planting area, a waterweed planting area and paddy field crab ditches. The rice planting area is divided into a ring field rice planting area and inner rice planting areas. The ring rice planting area is of the shape of a rectangular ring. The paddy field crab ditches are arranged on the internal side of the inner ring of the ring rice planting area. The waterweed planting area is arranged between the paddy field crab ditches and the inner rice planting areas and is used for planting waterweeds. The ridge is arranged on the periphery of the rice planting area. The canal is arranged on one side of the ridge. The water inlet pipe is arranged between the canal and the paddy field crab ditches. The intensive juvenile crab paddy field aquaculture mode has the advantages that the aquaculture mode promotes the standard aquaculture of juvenile crabs, the time and the labor for feeding feed and the like are saved, the labor cost is saved, the uniform intensive aquaculture production is facilitated, the crabs can be effectively prevented from being stolen, escaping and being eaten by birds, and the economic benefits are obviously improved by improving values of crops, rice and juvenile crabs.

The invention discloses a paddy rice planting method. The existing planting method can only plant paddy rice in specific seasons of a year; the paddy rice planting method is characterized in that heating pipelines are laid in rice soil; a deepwater well is arranged; heat absorption pipelines are used for extracting terrestrial heat from the deepwater well so as to transmit the terrestrial heat tothe heating pipelines; and the stream flow in the heating pipelines are discharged through a drainage pipeline. The heat absorption pipelines can be used for directly sucking geothermal water from thedeepwater well so as to extract terrestrial heat which is transmitted to the heating pipelines; and also, the middle parts of the heat absorption pipelines extend into the deepwater well, the streamflow is transmitted into the heat absorption pipelines and heated in the deepwater well so as to extract terrestrial heat which is then transmitted to the heat pipelines; and water source with propertemperature can be adjusted to irrigate rice fields. The paddy rice planting method leads the heating pipelines to heat the rice fields so as to form a 'paddy field hotbed', increases the output in the seasons suitable for planting the paddy rice under natural conditions, and also can plant the paddy rice in the seasons which are not suitable for planting the paddy rice under natural conditions. No pollution is generated, ground water can be utilized repeatedly, the energy is saved and the environment is protected.

The invention discloses a soil remediation agent formula for cadmium-arsenic polluted rice planting. The soil remediation agent formula is prepared from, by weight, 25-30 parts of quicklime, 10-15 parts of an iron agent, 8-10 parts of a silicon raw material, 5-8 parts of phosphate, 10-15 parts of a natural mineral material, 6-10 parts of humic acid, 8-10 parts of acidified activated carbon, 5-8 parts of weathered lignite, 9-12 parts of sepiolite powder and 2-4 parts of chitosan. The invention further discloses a preparation method of the soil remediation agent formula for cadmium-arsenic polluted rice planting. The effective-state cadmium content and the effective-state arsenic content in rice planting cultivated land (paddy field) polluted soil are effectively reduced, so that the rice cadmium content and the rice arsenic content in rice grains are reduced; meanwhile, the effects of increasing the rice yield and improving the soil fertility are achieved; and the formula has the advantages of no secondary pollution, strong practicability and simple process, and has huge development potential in the soil combined pollution remediation application of the rice planting farmland (paddyfield).

The invention belongs to the technical field of paddy field arsenic pollution treatment, and particularly discloses a rice cultivation water management method for a moderate and mild arsenic pollution paddy field. The water content of the arsenic pollution paddy field is reasonably adjusted by alternately performing waterflooding-moistening irrigation in the whole growth period of rice, the arsenic content of soil solution is remarkably reduced, and trivalent arsenic in soil can be transformed into low-toxicity pentavalent arsenic. By changing the form and the valent state of the arsenic in the soil, arsenic absorption and accumulation of the rice are reduced, so that the arsenic content of the rice is reduced. Measurement proves that the arsenic content of the rice cultivated by the method meets the pollutant limit standard (inorganic arsenic<0.2mg / kg, GB2726-2012) of national food.