41 results about "Weedy rice" patented technology

The invention relates to a method for preventing and removing rice weeds and weeds in direct seeding and interplanting seeding paddy, which pertains to a technical field of plant protection. The invention is mainly characterized in that: rice weed seeds and weed seeds left during direct seeding and interplanting seeding of last year are induced to grow; after former planted paddy is harvested, Glyphosate, a spray sterilant herbicide, is employed to prevent rice weeds and weeds, and solving the problem of incapability of removing older green weeds left during former planting paddy in direct seeding and interplanting seeding paddy; meanwhile, the Glyphosate has no effect on germination and growth of planted rice seeds and is environment friendly. The method for preventing and removing of the invention overcomes the shortages of incapability of employing chemical herbicides to remove rice weeds, worse and worse influence to normal direct seeding paddy, interplanting seeds, etc., and even destruction of cultivation and repeated displanting. The method for preventing and removing is in favor of paddy production in direct seeding and interplanting seeding and has significant social benefits.

The invention relates to a method for differentiating indica japonica of weedy rice through two repeated DNA (Deoxyribonucleic Acid) sequences. In the method, plasmid DNAs of cloning pTA71 containing wheat 45SrDNA gene sequences and cloning pOs48 containing repeated serial sequences of subtelocentric rice AA group chromosome are extracted, and 45SrDNA and Os48 probes are formed by using pOs48 labeled by using digoxin-dUTP (deoxyuridine triphosphate) and pTA71 labeled by using biotin-dUTP through a nick translation method to differentiate the indica japonica of the weedy rice. The method comprises the following steps of: flaking and denaturing a metaphase chromosome of the differentiated weedy rice before karyokinesis; carrying out two-color fluorescence in-situ hybridization between the metaphase chromosome and a denatured hybridization solution containing the probes; detecting a signal of the metaphase chromosome in the dark; and classifying the indica japonica of the weedy rice of different sources according to the locus number and distribution characteristics of the 45SrDNA and the Os48 on the metaphase chromosome of the weedy rice before the karyokinesis.

The invention discloses a method for culturing crawfish and removing weedy rice without ditching and bait casting in a plate type rice field. The method comprises the following steps: Step 1: choosinga suitable plate-type rice field and transplanting seedlings with water manually; Step 2: after harvesting rice, exposing the rice for 10-15 sunny days, and watering the field surface when the surface of standing rice stubbles becomes slightly yellow and crushed straws are all withered; Step 3: after the broken straw scattered in the field is basically decomposed, fermenting organic fertilizer inthe rice field, and harrowing the organic fertilizer evenly and leaving base fertilizer for future rice growth; Step 4: introducing water earthworms in the rice field after fertilization; Step 5: planting elodea and eyebright in strips in different areas; and Step 6: according to the degree of aquatic plant coverage and the number of early seedlings for breeding crayfish, restocking high-qualitycrayfish seeds at the right time. All the rice stalks are turned to the field after the rice is harvested without affecting the growth of crayfishes, so that the purpose of culturing the crayfishes and removing weedy rice in the plate type rice field without ditching and bait casting is achieved, and the culture efficiency of the rice field is improved.

The invention relates to a molecule marking method for a red peel gene of weed rice and belongs to the field of molecular genetics. A rice type of 02428(white peel) is utilized to be hybridized with Yangzhong weed rice (red peel) to confirm that the red peel gene of the Yangzhong weed rice is a dominance single gene which is decided by a maternal gene; a reciprocal cross result shows to have no cytoplasm effects. An InDel marker RID14 is designed according to the gene structure of the red peel gene Rc of the cloned common wild rice; the InDel marker is co-separated with the red peel gene of the weed rice. The marker can be utilized to accurately and effectively identify the red weed rice and the derived line thereof from the cultivated rice and can provide a molecule basis for the identifying of the weed rice.

The invention discloses a primer for weedy rice detection as well as a molecular detection reagent kit and a detection method adopting the primer. The primer for detection comprises a positive primer 5'-TTACAGGGGAGCAGAAACA-3' and a reverse primer 5'-TCTTCTCCTCTCTTTCAGCAC-3'. According to the detection method, after the DNA (deoxyribonucleic acid) extraction, the primer is used for PCR (polymerase chain reaction) amplification, electrophoretic separation is carried out, and colouration observation is carried out. When the detection method provided by the invention is utilized, the weedy rice, the culture rice and the field hybrid rice produced between the weedy rice and the culture rice can be effectively detected.

The invention discloses a method used for breeding imidazolinone herbicide-resistant japonica rice. According to the method, imidazolinone herbicide-resistant Oryza sativa subsp. japonica mutant CL55 is taken as the parent, and hybridization with a high-quality high-yield conventional japonica rice variety is carried out; conventional breeding and seedling stage herbicide resistance identification and screening technology are combined so as to breed the imidazolinone herbicide-resistant japonica rice variety. Compared with that of CL55, agronomic traits, yield, and quality of the imidazolinone herbicide-resistant japonica rice variety are improved and increased greatly. Genetically modified organism-free technology is adopted to breed the imidazolinone herbicide-resistant japonica rice variety, weed control problems of weedy rice in direct seeding rice fields can be solved, labor intensity is reduced, production cost is reduced, and the development of rice light cultivation technology of our country is promoted.

The invention provides a rice planting method comprises the steps of seed selection, seed sowing, seedling transplanting, young panicle differentiation stage, heading stage and maturation stage. When rice panicles droop and turn golden yellow, the rice can be harvested. Compared with the conventional rice planting methods, the method used for rice planting has the advantages that plump-eared rice can be harvested, and the quality and the yield of rice are greatly improved; through the treatment of rice seeds, the germination rate of the rice seeds is increased; the treatment in the heading stage can increase the content of trace elements in rice and is conducive to nutrient balance; the occurrence rate of plant diseases and insect pests of rice is reduced and accumulation of rice nutrients in rice grains is promoted. According to the statistics of planting tests of five years in a row, the rice planting yield of the method is 15%-18% higher than that of general planting methods.

The invention discloses a double analysis method of online glume-gaping seed rice identification. A monochrome industrial camera collects front-side and back-side images of moving seed rice synchronously, an image processing algorithm is used to carry out image processing and glume-gaping feature extraction on the front-side and back-side images successively, detection identification is carried out via the features in the front-side and back-side images, analysis results of the front-side and back-side images are integrated to implement screening and rejecting, and a detection result of the glume-gaping seed rice is obtained. According to the invention, the images of the two sides of the seed rice are obtained synchronously, multiple threads are used to process the images and realize engineering, and the glume-gaping seed rice can be identified and processed in higher precision and efficiency.

The invention discloses a rice seed soaking agent and a using technique thereof. The rice seed soaking agent is 20% fenclorim EC, is 30mg / L in seed soaking concentration, is high in safety and capable of remarkably reduce phytotoxicity of pretilachlor to rice and can be applied to prevention and control of weedy rice in a water-direct-seeding rice field. Compared with a method of spraying after rice seeding, the rice seed soaking agent and the using technique have the advantages of low consumption, low cost and easiness in operation.

The invention discloses a method for assessing a weedization gene flow risk of transgenic rice and application thereof. The method comprises the following steps: performing mixed cropping by intercropping or surrounding cropping, respectively harvesting offspring seeds of transgenic rice and weedy rice, performing forward flow detection and seedling resistance screening, and detecting a resistancegene of surviving plants; and performing reverse flow detection on a red husk Rc gene in seeds. According to detection rates of the resistance gene and the Rc gene, a gene flow rate of the transgenicrice is calculated, and a gene flow risk is assessed. The method overcomes the defect that the actual flow risk is underestimated in the past since only the forward flow risk is considered and the reverse flow risk is ignored, and thus, the pollen-mediated gene flow risk of the transgenic rice can be assessed more accurately, thereby providing technical supports for environmental safety evaluation and management in the transgenic rice commercialization process.

The invention discloses a molecular detection method for rapidly and accurately identifying weedy rice and cultivated rice, and belongs to the technical field of biology. The method includes the following steps: extracting a rice genomic DNA sample; performing nested PCR amplification on the rice genomic DNA sample; taking a PCR product as a substrate, and performing enzyme digestion reaction by using corresponding restriction enzyme; and detecting an enzyme-digested product through agarose gel electrophoresis to identify weedy rice and cultivated rice. The method can perform identification inthe seedling stage of rice, so that the purpose of early discovery and early weedy rice control can be achieved. The method adopts a nested PCR method to perform amplification on SNP sites, so that the specificity and sensitivity of amplification reaction can be guaranteed, and the obtained PCR product can be directly used for the enzyme digestion reaction of the restriction enzyme; and the wholeprocess does not exceed 6 hours, and needed instruments and reagents are easy to obtain and cheap in price, so that the method is simple in operation. The method designs three pairs of specific primers for three SNP sites, and adopts triple certification of detection results to guarantee the accuracy of the results.

The invention discloses germination technology for promoting seed rice to germinate through using a germination agent. The method adopted for seed freezing in the step (1) comprises soaking seeds in clear water with the temperature of 4-7 DEG C and using low temperature to quickly kill diseases and pests in seeds. A pesticide solution in the step (3) is a sodium hydroxide solution, and a pesticide is used for further killing diseases, pests and bacteria. A germination bed in the step (4) comprises a base bed, an air-permeable layer and a nutrient layer, wherein the air-permeable layer is a germination bed made from soil, sand and filter paper that are laid layer by layer. The germination bed can provide nutrient substances for seed germination, and the air-permeable layer can complement oxygen during a seed germination process and is beneficial for seed germination. In the step (4), the cultivation temperature in darkness is 18 DEG C, and the cultivation temperature in light is 28 DEG C. The ideal germination effect is achieved through different temperature arrangement cooperating with light condition.

The invention discloses a rice planting method capable of controlling weedy rice. The rice planting method includes the steps that mechanical tillage and soil preparation are performed 2-3 weeks before planting, the field is prepared like a conventional machine transplanting field, and base fertilizer application and weed removal are performed before machine transplanting; a diisothiocyanatomethane agent is adopted for soaking seeds and accelerating germination, and seedling trays are adopted for culturing seedlings; the seedling trays are placed in a greenhouses for stacked seedling emergenceand culture, timely moisture management is performed, and disease and pest control is performed; when rice reaches the seedling age, the seedlings are dug out for machine transplanting together withthe trays; at the middle and later stage of tillering, manual pullout is adopted; at the heading stage, manual pullout or cutoff is adopted; before the rice enters the flowering and fruiting stage, weeds are completely removed; a conventional method is adopted for field management. The rice planting method can effectively prevent the survival and reproduction of weedy rice seeds, realize the direct sowing of rice, reduce the production cost and prevent the weedy rice harm caused by the direct sowing of rice; the rice planting method is a green and ecological agronomic control method for weedyrice and realizes the sustainable production of rice.

The invention belongs to the field of agriculture genetic engineering, and particularly relates to mutation type PSII D1 or psbA D1 protein, and coding nucleic acid and application thereof. Compared with the amino acid sequence of wild type rice PSII D1 or psbA D1 protein, the amino acid sequence of the mutation type PSII D1 or psbA D1 protein has the characteristics that one or more mutants selected from the following 219I, 249A, 251V, 255Y, 256A, 264G, 264A, 264T, 266T and 275F exist at one or more positions corresponding to the 219th, the 249th, the 251st, the 255th, the 256th, the 264th, the 266th and the 275th sites in the amino acid sequence of the wild type rice PSII D1 or psbA D1 protein as shown corresponding to SEQ ID. 04. Through the mutation sites, the capacity for resisting PSII restraining herbicides is given to rice, so that the problem that weedy rice and other crops are seriously subjected to phytotoxicity of herbicides can be solved.

The invention discloses a PCR primer for rapidly identifying weedy rice in an early stage and application thereof. A single PCR primer P-Bh4 and a double PCR primer P-Bh4 / P-Rc are designed in a deletion marker area of a black glume gene Bh4 and a red peel gene Rc of rice; PCR amplification is carried out on rice genome DNA by using the primers; and a product is subjected to agarose gel electrophoresis separation, and the weedy rice is identified according to an electrophoretic band. According to the PCR primer for rapidly identifying the weedy rice in the early stage and the application thereof, the weedy rice with black glume or red peel can be identified by detecting wild type genes of the black glume gene Bh4 and the red peel gene Rc, so that the weedy rice can be comprehensively and effectively identified; and the PCR primer can be used for rapidly identifying the weedy rice in a rice seedling stage, the operation is simple, the result is accurate, and batch detection is easy.

The invention discloses an identification method and application of pathogenic bacteria of weedy rice, and particularly relates to the technical field of identification of the pathogenic bacteria of the weedy rice. The method includes the specific steps: S1, widely collecting weedy rice disease samples; S2, separating, purifying and storing the pathogenic bacteria of the weedy rice; S3, identifying the pathogenic bacteria of the weedy rice; and S4, determining pathogenicity of the pathogenic bacteria of the weedy rice. According to the method, investigation and screening of pathogenic fungi ofthe weedy rice are actively carried out, so that a pathogenic fungus resource database of the weedy rice is established; fungus herbicides are developed advantageously, and can be applied to rice production to reduce the harm to the weedy rice, the safety of rice planting is guaranteed to the maximum extent, the economic benefit of rice farmers is improved, agricultural development and farmer income increase are further facilitated, and important scientific significance and wide application prospects are achieved.

The invention relates to a rice seed treatment agent, which comprises effective components and auxiliary agents, wherein the mass of the effective components accounts for 5-85% of the total mass of the rice seed treatment agent, the effective components are isoxadifen and gibberellin, and the auxiliary agents comprise three or more than three materials selected from a surfactant, a solvent, a suspending auxiliary agent and an anti-freezing agent. According to the present invention, the rice seed treatment agent can treat rice seeds, can improve the drug resistance on fenoxaprop-P-ethyl and other herbicides at the rice seedling stage, can improve the selectivity between rice and other malicious weeds such as weedy rice and the like of herbicides, can ensure the seedling emergence rate of rice, and can reduce the influence on the germination rate of rice seeds during the single treatment with isoxadifen.

The invention provides a wheat / rape-rice intercropped planting method free of sowing, transplanting and ploughing. The method comprises the following steps: mechanically harvesting rice and using unhusked rice falling to the ground as rice seeds, leaving the rice seeds on the surface of a wheat or rape field without ploughing, and obtaining rice seedlings without sowing through germination and growth of the rice seeds at proper temperature and humidity in the next year, wherein the yield can be flush with that of a cultivated rice transplanting field or increased by more than 5% through density shifting and blank filling. The invention provides another wheat / rape-rice intercropped planting method free of sowing, transplanting and ploughing; the method comprises the following steps: mechanically harvesting rice and using unhusked rice falling to the ground as rice seeds, thus avoiding ploughing, sowing and rice transplanting in the next year, and putting a large quantity of ducklings into a rice field during a stooling stage, wherein a water layer in the field is stirred into muddy water by the ducks, so that weeds are difficult to germinate and grow, and rice field pests are eatenby the ducks in the growth process of the ducks; the growth of the rice is supported through decomposition of straws, excrement of the ducks and supplementation of organic fertilizers; and the ducks walk in the rice field to form irregular plant spacing, so that the growth of the rice is promoted to a certain extent. The two above-mentioned methods are also suitable for planting edible weedy rice.

The invention belongs to the technical field of environmental biological safety detection and relates to a gene escape detection method. Cultivated rice, weedy rice and wild rice groups serve as analysis materials, hood cage conditions are utilized, planting is performed in the environment which is free of insect pressure of target pests and the environment which is high in insect pressure, fitness traits of the groups are measured, average compound fitness values of the groups are calculated, comparison and analysis are performed on differences of the average compound fitness values of the weedy rice or wild rice groups and the cultivated rice, and the environmental risk caused by a gene escape and the degree of the environmental risk are predicted. According to the gene escape detection method, the fitness differences caused by transgenes and the potential environmental risk of the fitness differences are detected and analyzed without transgenic plants and accordingly the detection result is reliable, the environmental risk caused by mismanagement on the transgenes is avoided, and the gene escape detection method is beneficial to environmental safety evaluation of commercial production of transgenic cultivated rice.

The invention which relates to a herbicide resistant regulator for the safety growth of rice belongs to the technical field of regulators for the safety growth of rice. The regulator is characterized in that the regulator contains 5-50% of 4,6-dichloro-2-phenylpyrimidine and 0.0025-0.03% of abscisic acid. After using the regulator to soak seeds and using a butachlor missible oil or pretilachlor missible oil herbicide to weeding, the rice root length and the biomass are substantially improved, the leaf color, the growth potential, the growth period and the like of rice are normal, the yield increase is substantial, the control effect on weedy rice reaches above 90%, and control effects on weeds of barnyard grass and Semen Euphorbiae reach 90% and above 85% respectively.

The invention relates to a method for preventing and removing rice weeds and weeds in direct seeding and interplanting seeding paddy, which pertains to a technical field of plant protection. The invention is mainly characterized in that: rice weed seeds and weed seeds left during direct seeding and interplanting seeding of last year are induced to grow; after former planted paddy is harvested, Glyphosate, a spray sterilant herbicide, is employed to prevent rice weeds and weeds, and solving the problem of incapability of removing older green weeds left during former planting paddy in direct seeding and interplanting seeding paddy; meanwhile, the Glyphosate has no effect on germination and growth of planted rice seeds and is environment friendly. The method for preventing and removing of the invention overcomes the shortages of incapability of employing chemical herbicides to remove rice weeds, worse and worse influence to normal direct seeding paddy, interplanting seeds, etc., and evendestruction of cultivation and repeated displanting. The method for preventing and removing is in favor of paddy production in direct seeding and interplanting seeding and has significant social benefits.

The invention provides a high-speed rice seedling transplanting machine, which comprises a machine body and a rice seedling transplanting device at the rear of the machine body. The machine body comprises an engine, traveling wheels, a driver seat and a steering wheel. The rice seedling transplanting device comprises a rice seedling carrying platform, a rice seedling transplanting apparatus and aplurality of floating plates (46). The engine is installed at the protruding part of the output shaft of the engine at the front of a gearbox and on the side surface of the machine body. A certain distance is kept between one side of the gearbox and the output shaft of the engine. A hydraulic stepless transmission (HST) with an input shaft is installed at a parallel position. The output shaft is connected with the input shaft through a belt rotating device. A driven belt wheel (144) which transmits power through the output shaft (110a) of the engine (110) is installed in the input shaft (120a). A hydraulic pump (130) which can be linked with the driven belt wheel (144) is arranged on the external side of the machine body (1) on the same line of the driven belt wheel (144) and relative to the lateral side of the driven belt wheel (144). The high-speed rice seedling transplanting machine has the advantages that an extension shaft is not required to be added and an air pump can be connected onto the linked belt wheel; the assembling and production expenses of the device are reduced; and the configuration of a space-expanded high-speed rice seedling transplanting machine can be realized.

The invention provides a method for planting edible weedy rice. New uses of weedy rice are creatively developed, and the method for planting the weedy rice is provided. The falling-on-soil ability ofthe weedy rice after maturity is high, no-tillage and mechanical harvesting of rice are used to enable seeds of the weedy rice to fall to the soil, the weedy rice has high stress resistance and environmental adaptability, even in poor conditions, the weedy rice can grow tenaciously, the falling off of the grains of the weedy rice caused by mechanical harvest of a previous season of rice might cause uneven emergence of the weed rice in the season, and a method of removing seedings from dense area to sparse area can be used, so that the yield of the edible weedy rice is increased; the yield of the edible weedy rice is low, the value is high, the economic benefit is good, combined with a straw turnover and rice-duck co-cultivation technology, the yield of the edible weedy rice can be furtherincreased, the production cost is reduced, and the profit is increased.

The invention relates to a method for manually removing weed rice and belongs to the technical field of rice cultivation. Manual removal is still a main technical means adopted for weed rice control and removal at present, however, due to the fact that homology between the weed rice and common rice is high and the identification degree between the weed rice and common rice is not high, manual removal difficulty of the weed rice is increased, impurity removal efficiency is low, removal omission rate is high, and the rice planting cost is increased. In order to solve the problems existing in manual removal of the weed rice, a rice variety suitable for the local planting growth period of about 120 days is selected, a planting mode utilizing rice mechanical transplanting as a main mode and mechanical water sowing in drill as an auxiliary mode is adopted, 50 g of 3% gibberellic acid missible oil is mixed with 15 kg of water to be evenly sprayed on leaf surfaces of each mu 2 days after full heading of the rice, high weed rice ears are removed in time in two times 4-5 days and 8-9 days after spraying, and the rice ears are taken out of the field. By applying the method, the identification degree of the heading stage of the weedy rice can be remarkably increased, the removal efficiency of the weedy rice is improved, the removal omission rate is reduced, the overall quality and the rice yield of the rice can be improved, and the economic benefit is very remarkable.

The invention discloses a method for culturing hairy crabs eating weedy rice in freshwater, and relates to the technical field of agriculture. The method comprises the steps that the hairy crabs are cultured by separating a culturing zone, a planting zone and a maturation zone step by step, juvenile crabs mainly taking the weedy rice as main food are cultured, and therefore the hairy crabs can massively eat the weedy rice in rice after entering the planting zone; the one-way channel gradient for selecting the high-quality hairy crabs to enter the planting zone is set in the culturing zone to select the high-quality hairy crabs. By implementing the technical scheme, the problem that work for selecting the high-quality juvenile crabs in the culturing zone is complex is solved, the problem that the survival rate of the hairy crabs is low due to the fact that the situation that the weak serves as a prey to the strong occurs on the hairy crabs in the planting zone is avoided, the weedy rice in the rice can be removed, and therefore an economic benefit and ecological benefit win-win effect is achieved.

The invention relates to the technical field of agricultural production, in particular to a weedy rice spring ploughing and deep ploughing prevention and removal and pesticide spraying all-in-one machine, which comprises a ploughing device and a pesticide applying device. The pesticide applying device is arranged on the ploughing device. The pesticide applying device comprises a baffle and a pipe fitting, the two ends of the pipe fitting are rotatably installed on the two sides of the baffle, a plurality of rotary tillage blades are fixedly connected to the pipe fitting, the two ends of the pipe fitting are coaxially communicated with a cylindrical thin-wall structure, and the outer diameter of the thin-wall structure is larger than that of the pipe fitting. A plurality of through holes are formed in the end face, close to the rotary tillage blades, of the thin-wall structure, the pesticide applying device is used for filling the pipe fitting with pesticide liquid, in the seedling stage of the weedy rice in spring, the weedy rice is buried in the deep layer of soil through deep ploughing of the ploughing device to prevent growth of the weedy rice, and pesticide is sprayed through the pesticide applying device to inhibit growth of the weedy rice. The through holes are matched with the rotary tillage blades, so that the pesticide can penetrate into the ground to inhibit the roots of the weedy rice.

The invention discloses a wild abortive type sterility gene PCR (polymerase chain reaction) detecting primer WA7 and a combined primer WA7 / RED4. The combined primer WA7 / RED4 comprises a WA7 positive primer 5'-TTTGCCTTATTTTGACCTGTTTGA-3', a WA7 negative primer 5'-TACTTTCAGGAGGGGAGGCA-3', a RED4 positive primer 5'-TTACAGGGGAGCAGAAACA-3' and a RED4 negative primer 5'-TCTTCTCCTCTCTTTCAGCAC-3'. The combined primer WA7 / RED4 can be adopted to effectively complete identification on hybrid rice, weedy rice and conventional rice by once PCR, and can be used for simply, quickly, accurately and easily realizing batch detection.

The invention discloses a molecular detection method for rapidly and accurately identifying weedy rice and cultivated rice, and belongs to the technical field of biology. The method includes the following steps: extracting a rice genomic DNA sample; performing nested PCR amplification on the rice genomic DNA sample; taking a PCR product as a substrate, and performing enzyme digestion reaction by using corresponding restriction enzyme; and detecting an enzyme-digested product through agarose gel electrophoresis to identify weedy rice and cultivated rice. The method can perform identification inthe seedling stage of rice, so that the purpose of early discovery and early weedy rice control can be achieved. The method adopts a nested PCR method to perform amplification on SNP sites, so that the specificity and sensitivity of amplification reaction can be guaranteed, and the obtained PCR product can be directly used for the enzyme digestion reaction of the restriction enzyme; and the wholeprocess does not exceed 6 hours, and needed instruments and reagents are easy to obtain and cheap in price, so that the method is simple in operation. The method designs three pairs of specific primers for three SNP sites, and adopts triple certification of detection results to guarantee the accuracy of the results.

The invention discloses a sugar-free tea-flavored purple sweet potato rice dumpling which consists of a glutinous rice material and purple sweet potato stuffing, wherein the glutinous rice material is prepared from the following raw materials in parts by weight: 100 parts of glutinous rice, 1-5 parts of blend oil and 0.5-3 parts of black tea powder, the purple sweet potato stuffing is prepared from the following raw materials in part by weight: 100 parts of purple sweet potatoes, 5-15 parts of cooked lard oil, 1-5 parts of modified starch and 0.01-0.1 part of tea polyphenol, and the weight ratio of the glutinous material to the purple sweet potato stuffing is (1-3):1. Compared with a conventional sweet rice dumpling taking sweetened bean paste as the stuffing, the sugar-free tea-flavored purple sweet potato rice dumpling takes the purple sweet potatoes as the stuffing, no white sugar needs to be added into the stuffing during frying, the sweet rice dumpling without sugar is realized by utilizing the natural sweet taste of the purple sweet potatoes, and the rice dumpling is fragrant and sweet in taste and unique in flavor. In the sugar-free tea-flavored purple sweet potato rice dumpling disclosed by the invention, the glutinous rice is added with the black tea powder, the fried purple sweet potato stuffing is added with the tea polyphenol, so that the effects of synergistic natural oxidation resistance and guarantee period extension can be achieved due to the internal and external combination, and the fresh rice dumpling can be stored in a shady and dry place for more than 10 days for selling.