141 results about "Rice crop" patented technology

The invention discloses an OsNCEDs gene relative to drought resistance originating from rice. Coded protein has one of the following amino acid sequences: 1). SEQ ID NO: 1, 3 or 5 in sequence list; 2). The amino acid residue sequence for the SEQ ID NO: 1, 3 or 5 in the sequence list pass through replacing, lacking or adding of one to ten amino acid residue and derived protein has the function of controlling drought resistance of plants. The experiment proves that: the gene conversion rice can obviously improve drought resistance of rice. The invention has the advantages of having an important theory and actual meaning upon research of drought resistance mechanism for plants and improving drought resistance and relative characteristics, playing an important role in drought resistance gene engineering improvement for plants (especially for rice crops) and having wide application prospect.

The invention discloses a method of fully mechanized rice cropping during two harvesting seasons. The method comprises the following steps: A, breed selection: breeds with the growth duration being 120 to 135 days and high tillering capacity are adopted; B, timely seeding: the seeding data is from March 23rd to March 26th; C, reasonable close planting: the mechanical transplanted density is 13 to 18 thousand seedlings / mu; D, fertilization management: nitrogen control and potassium increasing are performed for first rice crop, and bud promoting fertilizer and hole applied fertilizer are respectively applied for ratooning rice within 10 to 15 days after heading of the first rice crop and 3 days after the harvesting of the first rice crop; E, water management: wetness management is performed during the later period of the first rice crop, and alternation of wetting and drying is performed during the middle and later periods of the ratooning rice; F: rice stubble height: the leaf cushion of a top second leaf is kept, namely the stubble height is controlled to be 40 cm; G, bud promoting chemical regulation: bud promoting regulating agent is applied on each of the second day and seventh day after the harvesting of the first rice crop; H, comprehensive control of diseases and pests. The method is simple, convenient to operate, is beneficial to yield increasing, promotes farmers to increase income on the premises that food safety is guaranteed, greatly reduces the labor intensity, improves the labor efficiency, reduces the labor cost, improves the rice quality, and realizes disaster reduction in year of famine.

The invention discloses a method for improving soil and preventing rice from absorbing heavy metal by utilizing steel slag. A month before rice seedlings are transplanted, the steel slag is applied in the soil and sufficiently and uniformly mixed with the soil, watering is carried out, and the flooded state is kept to wait for the transplantation of the rice seedlings. By utilizing the steel slag as an alkaline industrial byproduct rich in silicon to serve as soil amendment and regulating the chemical and biological processes of the acidic mineral water-polluted soil (improving the acidity of the soil and decreasing the activity of heavy metal) and the silicon-loving rice crop (regulating the behavior change of the heavy metal in the rice through the silicon) serving as two subsystems, the method improves the soil environment and reduces the heavy metal absorption of the rice, thus realizing the dual benefits of improving the polluted farmland soil and increasing the eating safety of the rice.

The invention relates to a ferment organic base fertilizer for rice and a preparation method thereof. The preparation method comprises the following steps of (S1) crushing 30% of water hyacinth, 20% of spirulina spirogyra, 10% of garlic, and 20% of straw to be muddy, and drying chicken manure with microwave until the moisture content is 60 to 65%; (S2) adding raw material prepared in S1, brown sugar and fermentation microflora into a fermenting kettle to ferment for 5 to 7 days at a temperature of 45 to 55 DEG C, and collecting fermented liquid during fermenting; and (S3) fermenting and rotting the solid raw material in a solid fermenting kettle for 7 days at the temperature of 45 to 55 DEG C, so as to obtain the ferment organic base fertilizer for rice. According to the preparation method, water hyacinth and blue-green algae are economically utilized and treated to prepare the solid ferment organic base fertilizer for rice and liquid leaf fertilizer by the fermentation method; and the ferment organic base fertilizer can promote the tillering as well as full seed of rice, also show remarkable effects on inhibiting and controlling a plurality of pest and disease damage, and is suitable for being expanded and applied in a large scale.

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 discloses a rice crop-residue-derived carbon-based slow release fertilizer coated by lignin-montmorillonoid-chitosan composite and a preparation method thereof. The rice crop-residue-derived carbon-based slow release fertilizer is characterized by being prepared by drying and cutting rice straw and then feeding to a pyrolysis device; after pyrolysis, cooling to room temperature and acquiring biomass charcoal; adding distilled water in the alkali lignin, heating and mixing to acquire A component; adding copper sulfate solution in the montmorillonoid, mixing and acquiring the copper-containing montmorillonoid; adding acetic acid to the chitosan and preparing to be solution; adding glycerinum and mixing with A component and copper-containing montmorillonoid evenly; mixing starch and sodium hydroxide, adding de-ionized water; after water-bathing, heating and mixing at constant temperature, fully mixing with polyving akohol, borax and formaldehyde; reacting and acquiring the crosslinking enveloping liquid; smashing the biomass charcoal and urea by a smashing machine; sieving and mixing with kaoline, placing in a round disk pelletizer; after fully and evenly mixing, spraying the enveloping liquid by a sprayer to mix; after shaping, stopping pelletizing; drying until the constant weight; acquiring the biomass charcoal urea fertilizer.

The invention discloses a rice crop primary processing device which comprises a screening machine box installed on a rack. The screening machine box is fixed to the upper end of the rack, a feeding opening is formed in the middle portion of the left side of the top end of the screening machine box, and a packing auger feeding mechanism is in butt joint with the feeding opening; a blast pipe is arranged on the right side of the feeding opening and is in butt joint with an external air blower; the screening machine box is internally provided with a thick screening net and a thin screening net from top to bottom in a spaced manner; a first sundry outlet, a grain outlet and a second sundry outlet are formed in the right side of the screening machine box; and a damping base is installed in the middle portion of the bottom end of the rack, a vibrating motor is fixed to the damping base, an eccentric connecting rod assembly is used for connecting the vibrating end of the vibrating motor with the bottom end of a base plate of the screening machine box, an air sucking pipe is arranged on the left side of the screening machine box, the inner end of the air sucking pipe is communicated with the interior of the screening machine box through multiple sucking openings, and the outer end of the air sucking pipe is in butt joint with a cloth bag dusting machine.

The invention discloses a rice ridge-pulverization ecological and efficient cultivation method. The rice ridge-pulverization ecological and efficient cultivation method comprises the steps that an auger-bit machine enters soil and vertically rotates, wherein the machine enters the soil to the depth of 25-30 cm; ridge-pulverization soil drilling and fertilization are carried out at the same time, and the land is not harrowed so that bottom deep-layer soil will not be disturbed afterwards; meanwhile, ridge-pulverization deep rotary tillage does not need to be conducted again when second rice crop is planted, no tillage or only 3-4 cm shallow tillage is needed, stratification and air permeability of the bottom soil are kept, and field farm operation such as cultivation, weed control, fertilization, pesticide application and water management is conducted in a cooperative mode. The rice ridge-pulverization ecological and efficient cultivation method can effectively solve the problem that a traditional farming mode easily causes soil environmental degradation, effectively improve labor efficiency of ridge-pulverization cultivation, achieve the effect that deep ploughing is not needed within 3-4 years each time ridge-pulverization is conducted, and keep the stable yield and the yield increase of rice continuously, thereby having important value and significance in the field of rice cultivation.

The present invention provides compositions and methods for controlling pests, especially rice crop pests. The composition of the present invention comprises one or more compounds (1A) and one or more compounds (1B-G), and preferably contains a suitable carrier.

The invention discloses a hybrid crop mechanized seed production technique which utilizes the combination parents, belonging to the cross-breading of the crops. The invention is characterized in that on the basis that the combination parent is gained by using current parent strain of the hybrid crop or selecting the systems in the same types and different growing periods, the mechanized sowing or grafting type is carried out according to proper row ratio of male parent and female parent; the harvest process is carried out after mature by respectively harvesting the male parent and female parent and by the synchronous and alternative operation; alternatively, a single harvester can respectively harvest the male parent and the female parent at the same time and ensure the hybrid seeds and the male parent seeds are separated from each other and not mixed together. The hybrid crop seed production technique of the invention meets the requirement that the florescences of the male parent and the female parent are encountered, realizes the mechanized operation during the production process, lightens the labor intensity, obviously reduces the seed production cost, quickens the process that the hybrid crops, more particularly, the hybrid rice crops are generalized and applied all over the world, especially for the developed countries, and prompts the global economical development.

The invention belongs to the technical field of science and engineering, in particular to a propagation method for rice dual-purpose genic male sterile line seeds with the pattern of high-temperature sterile, low-temperature fertile or long day high-temperature sterile, short day low-temperature fertile. The technique of the method includes: (1) a propagation base is required not only to meet the need of normal growing development of the conventional rice, but also to have sufficient water source at temperature of 17-19 DEG C and plant no other rice variety in the periphery of 300m; (2) the seeding dates of the first rice crop are arranged on March,15th-20th, (3) the water temperature of the field is maintained between 20-21 DEG C for continuous 15 days from the fourth period of the differentiation of the first young ears, an irrigation depth is based on young ears submergence and the growth process of the young ears to irrigate from shallow to deep until the depth is up to 20m; (4) the stubble height of rice stub after first harvestry is 20-25cm, the water temperature of the field is maintained between 20.5-21.5 DEG C for continuous 16-20 days from the fourth period of the differentiation of the second young ears, the irrigation depth is up to 28cm from shallow to deep; (5) abnormal plants and inferior plants are strictly removed. By specifying the technique, the purpose of producing high-yield, high-quality and high efficiency rice dual-purpose genic male sterile line seeds can be achieved.

The invention relates to an application of miR1156f in regulating rice root and tiller growth. Specifically, miR1156f can not only regulate rice root growth and / or control rice tiller but also regulate characters such as rice panicle type, grain shape, output, etc. Not only are applications of miR1156f, or miR1156f active segments, or miR1156f antagonist, or miR1156f agonist provided by the invention, but also a method for improving the rice crop is provided.

The invention belongs to the agriculture plantation technical field, and specifically relates to a southern rice cropping tobacco nitrogenous fertilizer application method; the method provides dual-line M-shape ridge mode so as to increase intensity and reduce base fertilizer nitrogen proportion, and 5 times of additional fertilizer watering can effectively improve nitrogenous fertilizer utilization efficiency, thus reducing nitrogenous fertilizer waste, saving production cost, reducing tobacco leaf nicotine content, improving tobacco leaf quality, greatly reducing environment pollution caused by nitrogenous fertilizer waste, and obviously improving tobacco output, output value and quality.

The invention discloses a pyraclostrobin and epoxiconazole compound suspending agent and a preparation method thereof and relates to the technical field of control on the leaf spot disease of banana crops and the false smut of rice crops. Every 1 L of the suspending agent is prepared from 80 g of pyraclostrobin, 120 g of epoxiconazole, 3 g of fatty alcohol-polyoxyethylene ether, 5 g of styrylphenol polyoxyethylene ether, 0.5 g of xanthan gum, 0.3 g of sodium benzoate, 0.5 g of a defoaming agent and the balance of deionized water. All raw materials are sucked into a preparation reactor to be mixed, subjected to preliminary grinding by a colloid mill and then subjected to fine grinding by a sand mill, sampling and analysis are performed, and filtration, metering, package and warehousing are performed after qualification. The pyraclostrobin and epoxiconazole compound suspending agent has good effects of controlling the leaf spot disease of the banana crops and the false smut of the rice crops, and obvious synergistic effects of the pyraclostrobin and the epoxiconazole can be realized.

The invention provides application of a gene which can improve the agricultural production traits of rice and improve the bacterial blight disease resistance and includes application of rice miR156 and a target gene of rice miR156 in improving rice resistance to the bacterial leaf blight. The invention also provides a method for cultivating anti-bacterial leaf blight transgenic rice, which comprises the following steps of: constructing an over-expression vector containing OsSPL7 or OsSPL14, transforming the constructed over-expression vector into rice, and up-regulating the expression of riceOsSPL7 or IPA1 / OsSPL14 to obtain the bacterial blight resistant transgenic rice; or down-regulating the expression of miR156 in rice crops so as to up-regulate miR156 target genes OsSPL7 and OsSPL14 (IPA1) to obtain the bacterial blight resistant transgenic rice. The method provided by the invention, on the condition of not affecting growth and development and improving the agronomic traits such as rice plant type and panicle type, takes microRNA as a starting point, provides a gene resource that affects rice plant type and panicle type, and also enhances resistance of rice to bacterial blight.

The invention provides a special selenourea slow-release composite fertilizer for rice. The fertilizer is prepared from, by weight percentage, urea, potassium chloride, monoammonium phosphate, sodium selenite pentahydrate, water and ash. The slow-release composite fertilizer further comprises synergist and a dispersion agent. A preparation method includes the steps that formaldehyde is conveyed into a urea melting tank, and sodium selenite pentahydrate is added for reaction to generate a selenourea formaldehyde chelate solution. High-temperature selenourea formaldehyde chelate is sprayed into mist from top to bottom and enters a cylinder granulation device, synergist and the dispersion agent are sequentially heated to 50-80 DEG C, then enter the cylinder granulation device of a fluidized bed and are mixed with smashed blocky fertilizer to form selenourea formaldehyde fertilizer particles, and the special selenourea slow-release composite fertilizer for rice is obtained. The fertilizer is scientific in ratio and comprehensive in nutrient, can gradually and continuously provide nutrients for rice crops, can make nutrients fully absorbed by rice, remarkably promotes rice growth, and remarkably increases the utilization rate of the fertilizer.

The invention provides a tobacco-rice crop rotation system rice field soil improvement method. The method comprises the following steps: tobacco stalks are cut into sections right in the field; a complex fertilizer promoting tobacco stalk decomposition is uniformly applied in the field; through land preparation of a rotary cultivator, the complex fertilizer promoting tobacco stalk decomposition is fully mixed with rice field soil and tobacco stalk sections; a complex fertilizer improving rice field soil is uniformly applied in the field; when the field is flattened, the complex fertilizer improving rice field soil is fully mixed with rice field soil. With the method provided by the invention, tobacco stalk decomposition speed and nutrient release rate are improved, such that soil nutrients are substantially improved. The rice field soil is improved, such that a technical support is provided for paddy rice high yield and high efficiency.

The invention relates to a planting method of ratoon rice and belongs to the technical field of planting. The planting method comprises selection of a planting variety and a specific planting method, wherein in terms of the selection of the planting variety, Xiangyou 63, Teyou 63, Diantun 502, Dianlong 201 and Dianrui 408 are planted and contrasted in tests, and the preferable rice planting variety is Dianrui 408; the planting method is determined after the planting varieties are contrasted in the planting tests and facilitates high yield of crops. With the adoption of the planting method of the ratoon rice, land can be reasonably used, the yield of rice suitable for being planted in the ratoon rice growth regions can also be increased, first rice crop and ratoon rice are reasonably managed in the growth process, the yield of the ratoon rice can be increased, and the annual output of the rice is increased.

A method for preventing and eliminating the weeds in rice field includes transplanting rice seedlings in the field, and spreading the broken straw in the field to form a strong reducing layer to suppress the germination of weeds and applying fertilizer.

The invention discloses a ridge type wet cultivation technology for paddy rice. The ridge type wet cultivation technology includes steps of (1), carrying out manure and rice rotation, sowing green manure in winters, to be more specific, planting astragalus sinicus or soybeans or oilseed rapes in slack seasons in winters, or returning straw to fields, combining land maintaining with land utilizing and biologically remedying the soil fertility; (2), forming ridges, directly sowing sprout rice, to be more specific, forming the ridges by means of water plowing and quantitatively directly sowing the sprout rice according to the ridges; (3), irrigating rice crops, to be more specific, managing water according to growth periods in a wet cultivation and dry management mode, controlling water consumption on the premise that physiological water requirements of the paddy rice are met, and only forming water layers for fertilization and pesticide application irrigation by the aid of natural rainfall instead of establishing water layers in the complete growth periods. The widths of the surfaces of the ridges range from 3 meters to 5 meters, and the widths and the depths of furrows respectively range from 0.3 meter to 0.5 meter. The ridge type wet cultivation technology has the advantages that lands can be maintained by the aid of the green manure, the paddy rice is subjected to ridge type wet cultivation, irrigation water consumption can be effectively controlled, cores of targets include production stabilization and cost economization and are supplemented by water conservation and land maintenance, accordingly, energy can be saved by the aid of the technology for the rice crops, environments can be protected by the aid of the technology for the rice crops, and the food and ecological safety can be guaranteed.

A method for semi-mechanically transplanting rice stubble rapes under condition of returning all straws is characterized by including three steps of smashing straws to return to field by straw machinery, ditching, upturning soil and bedding mechanically and arranging and planting the rice stubble rapes on the field in a laborsaving manner. In the first step, a rice crop combined harvester with a straw smashing device and a rice crop throwing device is utilized to harvest and function in returning rice crops to the field in situ, reducing labor for carrying the rice crops and returning the rice crops and preventing upturned soil from falling into ditches; in the second step, a double-side ploughshare type plough machine is utilized to ditch and realize effects of reducing labor and labor intensity and saving labor cost; and in the third step, gently arranging seedlings of the rapes to be close to lateral sides of the upturned soil beside the ditches and on the surface of the field, tightly covering the soil on roots of the seedlings to function in surviving the seedlings of the rapes and enabling the strong seedlings to be premature. The method for semi-mechanically transplanting the rice stubble rapes under condition of returning all straws is a novel simplified rape transplanting method which can save labor cost, reduce labor intensity and is beneficial to premature of the seedlings, and the purposes that mechanization rate in rape planting links is up to 70%, and the straws are all returned to the field are achieved.

The invention relates to a high-frequency plant regeneration method of rice cropping mature embryo, which is characterized by comprising the following steps: adopting white granulated sugar as compound carbon sources in callus induction culture medium, successive basic culture medium, differential medium and seedling strong root culture medium of rice; performing all-black culture 7 days before callus induction culture, and then switching to culture under light, obtaining callus; selecting pale yellow, dried and granular callus to be switched to the successive basic culture medium for culturing under light; selecting fluey callus to be switched to the differential medium for culturing under culturing light; selecting green shoot containing granular callus to be switched to the seedling strong root culture medium for continuously culturing, and forming strong tube plant.

The invention provides a rice reviving and tillering agent designed for treating maldevelopment in seedling stage, bakanae disease, rice blast, bacterial leaf blight, cooperblight, rice false smut and other unhealth symptoms of rice, caused by low temperature, waterlogging and cold damage. The rice reviving and tillering agent is a novel fertilizer finely prepared from bacillus subtilis, photosynthetic bacteria, actinomycetes, yield increasing fungus, BYM, kuh-seng and bone powder production leftovers and comprises strains A and other materials B, wherein the strains A comprise the following components: 1. 20-80 parts of bacillus subtilis; 2. 5-15 parts of photosynthetic bacteria; 3. 10 parts of actinomycetes; 4. 5 parts of yield increasing fungus; 5. 5 parts of BYM; 6. 5 parts of kuh-seng; and 7. 5 parts of bone powder production leftovers; and the other materials B comprise the following components: 1. 60 parts of brown coal powder; 2. 10 parts of white clay; 3. 20 parts of thoroughly decomposed dry animal excrement; and 4. 2-10 parts of sodium humate. The strains A and the other materials B are mixed together in the ratio of 1:9 and stirred evenly, and then pelleted, dried by using a drying cylinder at the temperature of 60 DEG C, and cooled, sieved and finally bagged.

The invention discloses a method for intercropping winter rapes and potatoes on middle-season rice crop. The method for intercropping the winter rapes and the potatoes on the middle-season rice crop comprises the steps of (A) preparing rest-balks, wherein the width of the faces of the rest-balks is 120cm, and the width of the furrows of the rest-balks is 40cm; (B) applying base fertilizer, wherein the base fertilizer for the rapes and the base fertilizer for the potatoes are simultaneously scattered and applied to the floor field of the faces of the rest-balks; (C) sowing seeds, the rapes are sowed in line on the upturned soil close to the edges of the rest-balks, the sowing width is within 10cm, ten thousands rapes per mu are reserved, the potatoes are arranged and sowed in the rest-balks, the planting distance is 22cm, and 1894 holes of the potatoes are planted per mu; (D) carrying out straw covering, wherein the seed potatoes are covered by straw for 6-7cm, and the parts of the sowing width of the rapes are not covered by the straw; (E) carrying out deep furrow hoeing, wherein the furrows of the rest-balks are hoed deep to 25cm under the field surface, and soil blocks are evenly moved and placed to the parts without the rapes or the potatoes; (F) carrying out soil covering, wherein if the weather is sunny after the seed sowing of the rapes, around 2cm crumbing soil covers the ports of the sowing width; (G) carrying out hilling, wherein after the seedlings of the potatoes are all emerged, the furrows of the rest-balks are cleaned, and the soil is beaten to carry out the hilling; (H) harvesting the potatoes, wherein the straw in the rest-balks is pushed aside, and the potatoes are harvested; (I) carrying out management, wherein the technologies of good seed application and promotion, potato accelerating germination sowing and the like are applied and popularized, and daily field management needs to be carried out well.

Disclosed are a fluorine pyribenzoxim compound with herbicidal activity and a preparation method therefor. The fluorine pyribenzoxim compound is O-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxygroup]benzoylphenyl(2-trifluoromethyl) formaldoxime, O-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxygroup]benzoylphenyl(3-trifluoromethyl) formaldoxime, or O-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxygroup]benzoylphenyl(4-trifluoromethyl) formaldoxime. The preparation method therefor uses trifluoromethyl-substituted formaldoxime and 2,6-bis(4,6-dimethoxy-2-pyrimidinyl-2-oxygroup) benzoic acid as the raw materials. The fluorine pyribenzoxim compound can achieve a control effect over 94% on barnyard grass, junglerice, and paspalum distichum in the paddy field, brings high safety to rice plants, and is environmentally friendly and low-toxic.

The invention discloses a method for nutrient emission reduction and crop stable yield maintenance in a vegetable and rice crop rotation field and belongs to the technical field of agricultural non-point source pollution control and crop production. Particularly, in the production process of the vegetable and rice crop rotation field, the effects of vegetable and rice crop rotation field soil runoff nitrogen and phosphorus nutrient emission reduction, crop stable and high yields and commodity character improvement are realized by the aid of the vegetable season appropriate biochar combined application technology and the vegetable season residual phosphorus rice season utilization technology. With the adoption of the technology, the rice crop rotation field soil runoff water nitrogen and phosphorus concentrations are reduced by 20.81% and 50.92% respectively, and the rice whole growing season nitrogen and phosphorus loss amounts are remarkably reduced by 20.81% and 50.92% respectively. Further, with the adoption of the technology, the vegetable and rice crop rotation field nitrogen and phosphorus runoff annual loss amounts are remarkably reduced by 12.88% and 42.24% respectively, and the vegetable and rice crop rotation field nitrogen and phosphorus runoff loss rates are remarkably reduced by 12.28% and 20.88% respectively. At the same time, with the adoption of the technology, the crop high and stable yields can be maintained, the cabbage head sphericity index and the compactness are improved by 1.94% and 2.54% respectively, and the cabbage commodity character is remarkably improved.

The invention relates to a method for mixed breeding of adult crabs and young carbs in a paddy field. A three-dimensional ecospecific breeding mode integrally combining rice, 1st crab species, young crabs, and soybeans is adopted. The method comprises the following steps: (1) selecting the paddy field; (2) selecting the 1st crab species and the young crabs, and respectively performing temporary culture; (3) fertilizing the paddy field; (4) digging an annular groove, a water inlet and a water outlet in the paddy field; (5) culturing rice crops and soybean crops; (6) respectively disinfecting the paddy field, the 1st crab specifies and the young crabs; (7) breeding the 1st crab specifies; and (8) breeding the young crabs. According to the method disclosed by the invention, weeds and insectsin the paddy field, and plankton and benthos in water are used for breeding the river crabs, and the quantity of the weeds, filamentous algae and pest in the paddy field can be controlled, so that themethod provides an ample space for growth of the rice crops and the yield of the rice crops is increased.

The invention discloses a herbicidal composition containing bentazone and cyhalofop-ethyl. The herbicidal composition uses bentazone and cyhalofop-ethyl as main active ingredients, and the mass ratio of bentazone and cyhalofop-ethyl is 1~80:1~80. The herbicidal composition of the present invention is applied to post-emergence weeding in paddy fields, especially for controlling gramineous and broad-leaved weeds in paddy fields, and has remarkable effects. Compared with a single agent, the herbicidal composition of the present invention delays weed resistance, has a wide herbicidal spectrum, long duration of action and is safe to rice and subsequent crops under the premise of improving the efficacy of a single agent.