805 results about "Rice growth" patented technology

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 discloses a method for obtaining the leaf area index and the average leaf inclination of rice canopy by using a hemisphere photographic process. The method comprises the following steps of: collecting a hemisphere image of rice canopy from bottom to top inside the rice canopy by using a digital hemisphere shooting system based on a fisheye lens; after performing gray conversion and binaryzation on the hemisphere image, obtaining the canopy porosity under the zenith angle at a viewing angle of 57 degrees, and calculating the rice canopies LAI and ALIA under the condition of the single zenith angle at the viewing angle of 57 degrees based on the Beer-Lambert law and a poisson model as well as the two characteristics of the blade projection function of the rice canopy; simulating the leaf inclination distribution of the rice canopy by an elliptic function and optimizing the rice canopies LAI and ALIA calculated by using the single-angle method so as to rapidly acquire the rice canopies LAI and ALIA. The rice canopies LAI and ALIA can be obtained in real time without picking up rice blade outdoors for destructive artificial measurement, and basic parameters for monitoring the rice growth in real time and remotely estimating the yield of rice are provided.

The present invention discloses a paddy field rail duck raising technology. Rice, insect, duckweed and duck constituting one biological chain are made to control each other; the time and the space for the four kinds of organisms to constitute the complex colony are controlled based on the rice growth rule and the symbiotic biological environment for rice and duck is improved to realize the pollution-less rice plantation and duck raising. By stimulating natural biological system, the duck raising in paddy field can control the harmful disease, pest and weed, reduce pesticide amount, produce green food material and increase rice field output value.

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 discloses a hyperspectral estimation method for chlorophyll contents at different rice growth periods. The method belongs to the field of agricultural technology, and comprises the following steps of determining canopy spectrums, determining chlorophyll contents and processing data. According to the method, aiming at a rice elongation stage, a heading period, a milk-ripe stage and a dough stage in northwest region, through analyzing the correlation of canopy reflectance and chlorophyll content at each growth period, a rice chlorophyll content inversion model based on a sensitive band and NDVI (Normalized Difference Vegetation Index) is built, the model inversion accuracy is compared, the correlation of canopy reflectance and chlorophyll contents at different growth periods of the rice is analyzed, and a theoretical basis is provided for utilizing a hyperspectral remote sensing technology for nondestructively, quickly and efficiently estimating rice canopy chlorophyll content research.

The invention provides a method for performing mixed sowing of astragalus sinicus and oilseed rape and returning green manures to the field. The method comprises the following steps: a, sowing astragalus sinicus, namely sowing seeds of astragalus sinicus 25-35 days before harvesting of late rice, and keeping field water suitable for growth of astragalus sinicus; b, sowing oilseed rape, namely oversowing seeds of oilseed rape 1-3 days after harvesting of late rice; c, turning over and pressing the astragalus sinicus and the oilseed rape, namely when the astragalus sinicus is in a full-blossom period and the oilseed rape is in a bud period, simultaneously turning over and retting two types of green manures about 15 days before planting of early rice, wherein routine ploughing, fertilizing and early rice transplanting can be performed after retting is performed for 8-10 days. The method provided by the invention can be used for solving the problems of single planting variety and single planting structure in production and utilization of green manures in the southern double-crop rice region, effectively solving the problems that green manure nutrients are imbalanced after uni-sowed Chinese milkvetch or oilseed rape is turned over and pressed and thus nutrient supply can not meet the requirements of the whole early rice growth period on the nutrients, and the like, being beneficial to the improvement on the yield and quality of aftercrop early rice and playing a role in directly promoting the green manure development re-arisen in China.

The invention discloses a method for improving saline-alkali soil. The method includes selecting saline-alkali soil improvement fertilizer comprising coal with not less than 40% of humic acid, organic farmyard manure, rhizobium manure and fulvic acid potassium; ploughing the soil and applying the saline-alkali soil improvement fertilizer; applying base fertilizer; irrigating the soil; soaking rice seeds in warm water until the seeds are cracked, sowing the seeds after water in the field evaporates and the soil layer is exposed, and irrigating the soil after the rice seeds take root; performing topdressing, and applying the saline-alkali soil improvement fertilizer and earing nourishing fertilizer according to seedling conditions, water quality and soil quality. The method has the advantages that salt-alkali resistant rice varieties are combined with the saline-alkali soil improvement fertilizer organically, the saline-alkali soil improvement fertilizer can meet nutrition requirements for rice growth, reasonable matching is achieved, raw materials used are from extensive minerals and industrial and agricultural waste, low cost and high pertinence are realized, improvement cost is reduced, and technical popularization and promotion are benefited.

The invention discloses a fertilizer specially used for rice and a preparation method thereof. The fertilizer comprises an organic fertilizer and an inorganic fertilizer, wherein the inorganic fertilizer is prepared from the following raw materials: urea, monoammonium phosphate, potassium chloride, lime nitrogen, magnesium ammonium phosphate, zinc sulfate, boric acid, a sterilizing agent, urea formaldehyde, diatomite, ATS and dicyandiamide; the urea formaldehyde containing ammonium thiosulfate and dicyandiamide serves as a coating, and the diatomite is attached to the outer side of the coating; the other raw materials are contained in the coating. The organic fertilizer is prepared from the following raw materials: sterilizing agent decoction dregs, chicken manure, bagasse, xylitol residue, cottonseed cake and plant ash. The fertilizer can meet the requirement of the whole rice growth period after being applied once, manual labor is saved, the soil aeration, fertilizer absorption and water retention characteristics can be improved, steady growth of rice plants is promoted, and the yield is increased by 10-20 percent per mu.

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 belongs to fertilizer technical field, more particularly relates to a rice special formula fertilizer, which is characterized in that effective elements of the fertilizer are calculated by weight percent of pure nutrient are nitrogen 25-15, phosphorus pentoxide 15-9, potassium oxide 20-12, silicon dioxide 5-0, calcium 8-0, sulphur 5-1 and zinc 2-1. Compared with the present technique, the rice special formula fertilizer of the invention has reasonable match, accords with the nutrient absorption law of rice, can promote rice growth obviously and raise rough rice output, increase economic benefits and improve rice nutriment quality. In application test, the rice special formula fertilizer of the invention increases the rice yield by 660-820 kg per hectare, increases income 756-146 RMB, increases crude protein, raw fat, crude fiber, nitrogenfree extract and crude ash by 4.1-8.6, 0.14-0.80, 0.4-0.8, 0.1-3.0, 0.4-1.0 percentage points respectively, increases brown rice rate, integral white rice rate, white rice rate of rice processed quality by 1.4%, 1.7% and 1.8% respectively, reduces chalkiness granule rate, chalkiness by 3.2% and 1.9% respectively, reduces content of amylose by 1.0%. In the meanwhile, the fertilizer utilization efficiency is raised by 5.1%-13.8%.

The invention which discloses a bactericide for promoting the growth and controlling the rice sheath blight and an application thereof belongs to the field of pesticides for controlling crop diseases. The bactericide comprises 0.1-10 wt% of cinnaldehyde, 10-25 wt% of an emulsifier, 0.1-10 wt% of azone, 20-50 wt% of alcohol, and the balance water. The bactericide is used as follows: cinnaldehyde and azone are dissolved in alcohol and are uniformly mixed, and water is added to the obtained solution to a constant volume. The invention also discloses the application of the bactericide in controlling the rice sheath blight and promoting the rice growth. An effective component of the botanical bactericide of the invention is from a natural plant extract cinnaldehyde, and the bactericide of the invention has multiple efficacies of crop growth promotion, production and income increase, quality improvement, nutrient utilization rate improvement, pest control, no pollution and the like, so the bactericide of the invention is suitable for the production of nuisance-free, green and organic agricultural products. The bactericide of the invention, which has the advantages of low cost and substantial application effect, has a very wide application prospect.

The invention discloses a compartment trench controlled irrigating paddy rice water-saving culturing method. The culturing method comprise she following steps of ploughing the soil, digging trenches, forming compartments, direct broadcasting or transplanting paddy rice, managing moisture and managing the field. A compartment and trench mode is employed for paddy rice plantation; based on different paddy rice growth periods, a circulating irrigation process with humid compartment surface soil and formed by full trench water-half trench water or full trench water-dry trench is achieved; paddy field compartment trench water level can be visually tested and compartment surface soil humidity can be determined, so irrigating time and amount can be determined and present intermittent irrigation technology can be optimized; irrigation water can be conserved; rain water and irrigation water utilization rate can be improved; and paddy rice yield can be maintained or improved.

The invention discloses a planting method for organic rice in a mountainous area. The planting method includes the following steps of address selecting, field preparing, seed processing, sowing and seedling raising, seedling transplanting, insect pest treating, later-stage fertilizer managing, irrigation processing, harvesting and straw and rice husk processing. According to the planting method for the organic rice in the mountainous area, fertilizer and pesticides are not used in the planting process for preventing insect and diseases, a solar insect killing lamp is mainly adopted, and ducks, frogs and fishes are stocked in a paddy field. The solar insect killing lamp integrates energy conservation, environmental friendliness, safety, illumination and the function of inducing and killing mosquitoes and other insects, and the insect killing function is high. According to the planting method, ducks, carps and frogs are stocked into the field, not only insects are removed, and particularly, a biologic chain wherein mutualistic symbiosis of species and cyclic utilization are achieved is formed in the field. Duck manure is used for fertilizing the field so that fodder organisms are multiplied to be fed to ducks, and meanwhile the rice growth is also promoted. The organic rice is good in taste and high in nutrient content, and the organic rice in the mountainous area is full in seed and low in chaff and hull rate.

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 double cropping rice nitrogen-saving high-yield production method. A double cropping rice planting region is selected; 15 to 30 days before late rice is harvested, astragalus sinicus planting is carried out; after the late rice is harvested, ditching is carried out according to an astragalus sinicus planting technology; 30 to 50kg of calcium magnesium phosphate fertilizer is applied per mu; 1 to 2kg of potassium chloride used as a base fertilizer is applied per mu; 10 to 15 days before early rice is transplanted, dry tillage and plowing pressing are carried out; land preparation is carried out according to the early rice planting requirements; azolla is bred; and after shoal water of field water, which has a height of 1.5 to 3.5cm, is kept for 8 to 10 days, the base fertilizer is applied to carry out early rice transplanting. During growth of the early rice and the late rice, duckweed utilization is naturally carried out; before the late rice is transplanted, a sustained-release nitrogen fertilizer is applied in one step as the base fertilizer; and on mid-to-late September in the next year, circulation operation of farming of planting astragalus sinicus green manure crops and the like is carried out. According to the invention, astragalus sinicus green manure is planted during the slack winter season of double cropping rice planting, the azolla is bred during growth of rice, the rice special sustained-release nitrogen fertilizer is applied to the late rice in a decreasing manner, the astragalus sinicus and the azolla are utilized to fix nitrogen and adsorb carbon, the land is maintained by the land, organic materials and an organic nitrogen source are provided for rice, nutritive substances in the double cropping rice field, which are easy to loss, are adsorbed, non-point source pollution is reduced and fertilizer supply and the fertilizer requirement of rice are coordinated and consistent.

The invention belongs to the technical field of the production of fertilizers, and discloses a slow-release compound fertilizer for mechanical transplanting of rice seedlings. An envelop slow-release component of the slow-release compound fertilizer comprises the following components in parts by mass: 45-55 parts of resin coated compound fertilizer, 4-10 parts of resin coated diamine, 12-20 parts of resin coated potassium chloride, 10-16 parts of 2-month resin coated urea and 10-16 parts of 3-month resin coated urea. The slow-release compound fertilizer only needs to be applied for one time, the fertilizer supply time is prolonged, and the synchronism of nutrient release and crop nutrient absorption can be realized, so that the release of the fertilizer nutrients can be basically matched with the later-stage nutritional demand of the rice growth. By adopting the slow-release compound fertilizer, the mechanical operation is facilitated, and the labor can be greatly reduced. Compared with a conventional way for applying the fertilizer in multiple times, the compound fertilizer has the advantages that the yield can be increased by about 7.36 percent, and the utilization rate of the nitrogen fertilizer is increased by 33.6 percent.

The invention belongs to a sowing method of crops, in particular to a synchronously ditching, ridging, fertilizing and sowing method for precise direct hole-sowing of rice, which comprises the following steps: a. simultaneously arranging a plurality of parallel water storage ditches on a wet mud surface that is leveled; b. forming a ridge with a certain height between every two water storage ditches; c. arranging a sowing ditch and a fertilizing ditch on each ridge; d. adopting a hole-sowing mode to sow rice sprouts into the sowing ditches; and e. applying fertilizers into the bottom of the fertilizing ditches, adjusting the fertilizing amount according to agronomic requirements, earthing and flatly covering after fertilizing. The invention can realize that slow release fertilizers, controlled release fertilizers or other fertilizers can be quantitatively applied near root systems of rice in a targeted way, be convenient for the absorption of root systems and the growth of rice, decrease the using amount of fertilizers and further reduce the production cost of the rice and the pollution to the environment.

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.

The invention relates to a nutritional composition fertilizer for paddy rice. The fertilizer consists of a seedling culturing fertilizer, a base fertilizer and a foliar fertilizer, wherein the seedling culturing fertilizer is the combination of humic acid coated urea, diammonium phosphate, zinc sulfate and boric acid; the base fertilizer is the combination of sulfur plus macromoleclar polymer coated urea, the diammonium phosphate or monoammonium phosphate and potassium chloride; and the foliar fertilizer is the combination of urea and monopotassium phosphate. The seedling culturing fertilizer is uniformly mixed into nutrient soil during the seedling culturing of the paddy rice, the base fertilizer is uniformly applied to a field in the whole layer before the transplanting of the paddy rice and the foliar fertilizer is applied separately or applied by combing the spraying of a pesticide during the growth and at the later stage of the paddy rice. The fertilizer of the invention has the advantages of meeting the nutrient requirement of the paddy rice in the whole growth period, increasing the utilization ratio of the fertilizer and increasing yield, along with convenient application and correct nutrition combination.

The invention provides an anti-rice black-streaked dwarf virus field inoculation identification method for rice varieties, and belongs to the technical field of agricultural science. A piece of rice field with certain conditions is selected as an identification nursery, different rice varieties are sown in special stages, it is identified that virus transmission interbody small brown rice planthoppers in the nursery have certain virus carried rate and population density after wheat harvest, and after rice grows to a specific growth period, the anti-rice black-streaked dwarf virus level of the rice varieties is evaluated according to the severity degree of disease. With the method, anti-rice black-streaked dwarf virus identification can be performed on a large number of rice varieties at a time, and the defects that the manual identification scale in a laboratory and the identification variety number are small are overcome. The identification method can be applied to the multiple fields of screening of anti-rice black-streaked dwarf virus rice varieties, variety resistance evaluation, resistant variety breeding, researching on the law of genetics of resistance and the like.

The invention discloses a water borne floating bed, the main body of which is a foam board. A plurality of taper base holes are arranged on the foam board according to space requirement of the rice growth line distance. A taper plastic retainer cap is installed in the taper base hole. Small holes are provided on the cup bottom and the cup wall of the taper plastic retainer cap. The invention also discloses a method for planting rice on the floating bed. The invention develops the novel technology for planting rice in the natural water area, decreases the planting costs, alters the station of the paddy field rice and the water culture rice depending on the fertilizer and pesticide, saves water, electricity and labor force and purifies the water and environment.

The invention belongs to the fields of agriculture, an agricultural technology and bacillus application, and relates to bacillus megaterium H3 and application thereof in promoting crop growth and reducing absorption of heavy metal by crops. The bacillus megaterium H3 is adopted as a raw material, and is subjected to bacteria activation so as to prepare into a bacterial suspension. The bacillus megaterium H3 bacterial suspension is inoculated in heavy metal contaminated soil, so that the rice growth can be promoted, and the cadmium content in rice grains is reduced. When a passivator and the bacillus megaterium H3 bacterial suspension are complex-used in the heavy metal contaminated soil, the vegetable growth can be promoted, the vegetable quality is improved, and the cadmium content of edible parts of vegetables is reduced.

The invention discloses a rice cultivation method. The rice cultivation method comprises the following steps of: S10, preparing before seeding; S20, carrying out seeding operation; S30, carrying out irrigation by infiltration on a rice field in a whole growth period when the rice enters the growth period, and carrying out pest control and grass disaster control; and S40, timely harvesting according to the rice growth period and carrying out planting on next round of crops. According to the rice cultivation method disclosed by the invention, no-tillage direct seeding and irrigation by infiltration are organically combined, so that the no-tillage direct seeding saves a rice seedling bed period; and flooding irrigation is replaced by the irrigation by infiltration, so that the technical problems that the conventional rice cultivation technology is high in seedling transplanting and greenhouse gas discharging amount, and lower in fertilizer and moisture utilization efficiency are solved, energy-saving and emission-reducing capacity of a rice producing system is improved, and purposes of saving the oil consumption by 45%, comprehensively reducing emission of the greenhouse gas by 50% and remarkably improving the water fertilizer utilization efficiency are achieved; and moreover, the rice cultivation method is higher in mechanical degree, simplified in technology, easy to popularize, and especially has popularization prospect in a rice-wheat (oilseed rape) paddy-upland rotation region.

Disclosed are a rice growth regulator, a preparation method and a usage method thereof. The preparation method of the rice growth regulator includes using main raw materials of, by mass, 0.002%-0.0025% of abscisic acid, 0.5%-2% of urea, 0.1%-0.5% of boric acid and 0.2%-0.5% of monopotassium phosphate, dissolving the abscisic acid by means of ethanol, and evenly mixing the abscisic acid with other raw material aqueous solutions. Foliar spraying is performed at the middle and late stage of the growth of rice, so that stem-sheath assimilative matter translocation and grain filling of the rice are promoted, the setting percentage is increased, rice qualities are improved, and yields are increased; and besides, draught resistance and stress resistance abilities of the rice can be improved. The rice growth regulator, the preparation method and the usage method thereof are safe and environment-friendly, simple in preparation, low in cost, obvious in effect and easy to popularize.

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 soil conditioning method capable of reducing cadmium accumulation for paddy rice. The soil conditioning method comprises the following steps of: before ploughing and fertilizing acid soil contaminated by heavy metal cadmium, uniformly spreading a soil conditioner sulfite over the surface of the acid soil contaminated by the heavy metal cadmium, then applying a base fertilizer, and blending sufficiently; and with combination of soil flooding conditioning, making the soil in a flooded state in a rice growth period so as to make the acid soil contaminated by the heavy metal cadmium in a low-electrochemical-potential reducing environment with Eh being (-150mV)-(-300mV), effectively adsorbing the cadmium in the soil by using the generated reduzate, and generating chemical precipitates, thereby completing the soil conditioning process. The soil conditioning method disclosed by the invention is simple and reliable in operation, quick in response after utilization and obvious in economic benefits, and has great significance of controlling the heavy metal cadmium contamination of the soil and guaranteeing the food safety.

The invention relates to the field of agricultural cultivation, and relates to a paddy rice cultivation method. The method comprises the following steps: (1) paddy rice seeds are selected, and are subjected to seed soaking for 12-16h with a seed soaking liquid under a temperature of 35-37 DEG C; (2) a seedling-stage fertilizer is sprayed, and a seedling-stage substrate is applied; (2) when the seedlings reach a stage of 5-6 leaves, the seedlings are transplanted into a field spread with a cultivation base fertilizer; (4) when the paddy rice seedlings start tillering, a tillering fertilizer is applied; (5) when the paddy rice seedlings starts flowering, a flowering-stage fertilizer is applied; (6) when the paddy rice seedlings starts filling, a filling fertilizer is applied, and a foliar fertilizer is added; and (7) harvesting is carried out. The method provided by the invention is highly targeting. Targeting fertilization is carried out during various growth periods. With the treatment with the seed soaking liquid, a germination period can be shortened, paddy rice growth can be accelerated, paddy rice stress resistance can be improved, a period from germination to flowering can be shortened, and a flowering period and a fruiting period can be prolonged. During the tillering stage, tillering amount is increased with the tillering fertilizer. With the flowering-stage fertilizer applied during the flowering stage, pollination success rate can be improved. During the filling stage, with the filling fertilizer and the foliar fertilizer, filling rate is greatly improved, yield is improved, and paddy rice grain fullness is improved.

The invention discloses a cultivation method for organic rice. The cultivation method comprises the following steps: (1) cultivating rice seedlings; (2) cultivating a land for growing field crops; (3) preventing and treating plant diseases and insect pests and weed; (4) carrying out field management; and (5) harvesting rice timely and drying and storing the rice. According to the cultivation method for organic rice provided by the invention, occurrence of plant diseases and insect pests in a rice growing process is effectively reduced by arranging an insect-proof screen, performing rice-duck intergrowth and carrying out other physical means of prevention, so that use of chemical pesticides is reduced or even avoided. By applying a decomposed organic fertilizer which replaces a common chemical fertilizer, the fertilizer efficiency is improved, the resource investment is reduced, and meanwhile, pollution on soil and rice as a result of overusing chemical fertilizers is avoided. The cultivation method disclosed by the invention is easy to master, is convenient to plant and is suitable for being popularized and applied in a large area in an organic rice growth region, and moreover, the produced rice is good in color and luster, fragrant in taste and high in quality, and meets the demand of being safe, organic and environmental-friendly.

The method relates to the field of planting, in particular to a method for planting paddy rice on saline-alkali soil. The method includes: applying calcium sulfate powder to the saline-alkali soil, allowing the calcium sulfate powder to perform ion exchange reaction with salt in the saline-alkali soil, and ploughing to obtain soft saline-alkali soil; adding water to the soft saline-alkali soil to dissolve salt which is not reacted and neutral salt obtained after reaction, and irrigating to obtain slightly alkaline soil; applying base fertilizer produced by aerobic fermentation of composite biological bacteria, plant proteins, starch, trace elements and cow dung to the slightly alkaline soil so as to obtain the soil with the fertilizer; transplanting paddy rice seedlings to the soil with the fertilizer, and regularly spraying plant nutrient solution until the paddy rice is ripe. By the method, nutrient substance for paddy rice growth is provided, and high paddy rice yield is achieved.