114results about How to "Shortened reproductive period" patented technology

The invention discloses a high-efficiency multi-bacterial activity biogas residue biofertilizer and a preparation method thereof, and relates to the field of farm fertilizers. The biofertilizer is prepared by mixing and granulating 44 to 54 weight parts of biogas residue, 10 to 15 weight parts of potassium chloride, 10 to 15 weight parts of humic acid, 0.4 to 0.6 part of secondary and micro-element, 0.4 to 0.6 weight part of microbe, 5 to 10 weight parts of urea, 10 to 15 weight parts of monoammonium phosphate and 5 to 10 weight parts of ammonium chloride. The high-efficiency multi-bacterial activity biogas residue biofertilizer has the characteristics of better multiple bacteria co-existing environment, stronger bioactivity, higher fertilizer efficiency, complete organic matters, effective micropopulations and chemical nutrients, controlled-release effect and the like, can be used as a fertilizer for rice, also can be used as a fertilizer for Upland food crops, vegetables, melons and fruits and fruit trees, and can improve the fertility of land and the utilization rate of the fertilizer, improve the quality of agricultural products, enhance plant diseases and insect pest resistance and drought resistance, purify and repair soil and the like after being applied.

The invention relates to eupolyphaga breeding method using sawdust, disclosing a breeding material prescription and preparation method thereof. The breeding mainly consists of sawdust, yellow soil, vegetable garden soil, coalball slag or dried cow dung. The method for breeding eupolyphaga has the advantages of loose and breathable soil, good moisturizing factor, low cost, simplicity, convenience, short growing period of the eupolyphaga, strong disease-resistant ability, rapid propagation and high yield. The growing period can reduce 6 to 8 months compared to 30 months for wild eupolyphaga with an output raised about 30% to traditional breeding.

The invention discloses a cutting propagation method of eustoma grandiflorum. The cutting propagation method includes: day temperature of a female parent cultivation greenhouse is kept at 20-30 DEG C, night temperature is kept at 13-18 DEG C, relative air humidity during the day is kept to be 50-75%, and relative air humidity during the night is kept to be 70-85%; and sunshine time in a year is less than 13 hours. When a lateral bud of a female parent plant has eight leaves and one heart, a bigslip is cut out, cutting is performed on the bigslip after the bigslip is dipped in rooting powder, shading coefficient of an outer shading net of a cutting greenhouse is 30%, inner relative air humidity is kept to be 80-95% through high pressure mist, temperature is at 20-25 DEG C, CO2 concentration in the cutting greenhouse is kept to be 600-800ppm through CO2 fertilization, and a cutting seedling is transplanted to a flower cutting production greenhouse after the cutting seedling takes root. The cutting propagation method of eustoma grandiflorum reduces root disease rate and leaf disease rate substantially, shortens seed breeding stage, and promotes the eustoma grandiflorum pigslip to take root. Rooting time of eustoma grandiflorum is 23-25 days, rooting rate of eustoma grandiflorum is above 92%, and planting percent of eustoma grandiflorum is above 87%. The cutting propagation method of eustoma grandiflorum is suitable for commercial and large-scale propagation of eustoma grandiflorum.

The invention relates to a lilium oriental hybrids cutflower second-generation seedball rejuvenation utilizing method which mainly comprises the following steps of: cultivating seedballs after cutflowers are picked, harvesting the seedballs, sorting out, cleaning and sterilizing; gradually cooling the sterilized seedballs to 2-4 DEG C in a refrigeration house within 5-10 days, wherein the air humidity is 50-75 percent, and the concentration of CO2 is lower than 1,000ppm; carrying out cold treatment for 5-8 weeks to break dormancy, and then directly seeding or further cooling to -1.5 DEG C for freezing and preserving for 65-100 days; and then planting. The invention has the advantages that low-temperature treatment conforms to the physiological rules of the lilium oriental hybrids and can break the dormancy, shorten the childbearing period, promote the flower bud differentiation and ensure that plants have nutrition and vigorous growth, the leaf surface areas are increased, flowers are large, the cutflower weight is increased, and the cutflower quality and the commodity rate are improved; the refrigeration of the seedballs is safe, and the blooming time of the lilium oriental hybrids can be manually regulated and controlled so as to meet the requirement for supplying to the market at the annual time of the flowers; and the production cost is greatly reduced, and the cutflower planting economic benefit is improved.

The invention discloses a cultivation method for concentrated boll opening of cotton in cotton regions of the South China. Through unique processes of seeding, fertilizing, topping, ripening and the like, cotton colony structure and cotton fruiting and boll opening modes are optimized, the total growth period of the cotton can be shortened by 60-70 days, and especially, the boll opening period of the cotton is enabled to be concentrated within 30-40 days, so that convenience is brought to manual concentrated cotton harvesting or mechanical cotton harvesting, 4-5 workers in harvesting links can be saved by manual concentrated cotton harvesting compared with current cultivation methods, and a season contradiction between cotton production and winter crop soil preparation is solved. The cultivation method is especially suitable for popularization and application in multiple-cropping cotton regions of the South China.

The invention provides a Brassica napus annual multi-generation generation adding method. Four stages including seed pretreatment, transplanting and seedling management, flowering phase management and pod development period management are effectively controlled, and one-year three-cropping or four-cropping (ie, annual three-generation or four-generation generation adding) of the Brassica napus is realized, the seed breeding process is effectively accelerated, and the seed breeding year limit is shortened. The controllable greenhouse cultivation technology is adopted, so that the running around at different places are avoided, the time is saved, and manpower and material resources are saved. The Brassica napus annual multi-generation generation adding method is applied to backcross or cross breeding, and seed breeding of novel high-quality and high-yield disease-resistant varieties of Brassica napus can be accelerated.

The present invention discloses a bio-organic fertilizer produced in a quick fermentation manner by adopting crop stalks as a main material and a preparation method for the bio-organic fertilizer, and relates to the technical field of agricultural fertilizers. The bio-organic fertilizer is prepared by mixing and granulation of the following materials in parts by weight: 40-60 parts of crop stalks, 20-30 parts of live stock excrement, 10-20 parts of humic acid, 0.4-0.6 part of microbe fungus, 2-6 parts of ammonium chloride, 1-3 parts of potassium chloride, 2-4 parts of calcium superphosphate, and 0.4-0.6 part of medium and microelements. The bio-organic fertilizer has the advantages of being relatively low in production cost, relatively high in biological activity, high in fertilizing value, and broad in raw material sources, can be taken as paddy rice fertilizers, upland crop, vegetable, amphisarca and fruit tree fertilizers, and flower fertilizers.

The invention belongs to the field of vegetable farming and particularly provides a two-section type high-yield cultivation method for greenhouse asparagus. The method comprises the steps of cultivating and breeding biennial and triennial asparagus stools in the open field, preparing a field planting house, manufacturing standard ridges, preparing and applying planting nutrient soil, digging roots, transplanting the roots, planting the roots in a field mode, carrying out management after field planting and carrying out management all year round. According to the method, two-section type close planting cultivation is adopted, the investment is small, the yield is high, and the ecological environmental protection is achieved. In addition, the biennial and triennial asparagus stools are planted, the growth period is greatly shortened, and the first year of planting is the high-yield year.

The cultivation method of super early mature cotton includes selecting the cotton variety with genetically limited fruit bearing shoot or zero-type shoot in the 2-4 fruit bearing shoot positions; thrice spraying marketable mepiquat chloride of the amount of 1-1.5 g, 1.5-2 g and 2-3 g each mou in the full bud stage, the initial bloom stage and the full bloom stage separately. Compared with available similar variety, the present invention has growth period as short as 101 days, planting density up to 6000-12000 plants / mou and about 50 % raised cotton yield.

A granular nutritive additive for culturing edible fungus is composed of core containing crude protein and the water-insoluble coated layer which can be decomposed into carbonhydrate by the mycelia of edible fungus. It can be added to the culture medium of edible fungus to greatly increase the yield of edible fungus.

The invention relates to the technical field of crop planting, in particular to a high and stable yield cultivation method of double-cropping glutinous sorghum. By means of the measures of reasonably arranging growth periods of the glutinous sorghum and milk vetch, ditching and mulching, timely cutting poles, harvesting and the like, high and stable yields of the double-cropping glutinous sorghum are achieved. The cultivation method has the advantages that (1) by means of coordinating the growth periods of the glutinous sorghum and the milk vetch, one-crop green manure is additionally planted, diseases, insect pests and weeds are reduced, and successive cropping obstacles of the glutinous sorghum are reduced; (2) ditching and mulching are reasonably carried out, organic liquid dung is additionally applied, straws of the milk vetch are returned to the field at a higher speed, the function of the green manure on improving soil fertility is achieved, and soil is improved; (3) the growth period of the glutinous sorghum can be shortened by 3-11 days, and the yield of the double-cropping glutinous sorghum is increased by 120-200 kilograms with a growing rate of 15% - 33%.

The invention provides an environmentally-friendly dry odorless pig raising method and a pigsty thereof. A raising feed trough, a water drinking trough and a drain port are formed in the pigsty; the ground in the pigsty has gradient of 8 to 12 centimeters; and a dirt discharge port for excrement, urine and flushing is not formed in the pigsty. The invention also provides the method for raising pigs by using the pigsty. The method is convenient to clear the excrement in the pigsty by using spread padding, and the pigs drink plant extract blending solution. The environmentally-friendly dry odorless pig raising pigsty and the pig raising method are suitable for reforming a scale and intensive large-sized culturing farm and a traditional pig farm, in particular the reformation of the traditional pig farm; the reformed pig farm meets the environmentally-friendly standard; and the method has the advantages of no odor, zero emission, zero pollution, cost saving, strong disease resistance, high meat yield, delicious meat and high added value. Besides the pig raising income, the method can provide the pig excrement of the primary pollution source for an organic fertilizer plant to produce organic fertilizers so as to generate additional economic benefit.

The invention belongs to agricultural scientific research technology, and relates to the field of crop breeding science, in particular to a method suitable for accelerating the crossbreeding process of strong winter wheat in four generations in one year in an embryo culture technology. The method mainly comprises the following steps: step one, a wheat immature embryo culture technology; step two,seedling artificial vernalization technology; step three, a wheat plant reproductive growth regulation and control technology; and step four, a gene homozygosis accelerating technology for four generations of a crossbreeding generation system in one year. The method is easy and convenient to operate, controllable in procedure, economical and practical, completely aiming at the strong winter wheatby utilizing the embryo culture technology, the artificial vernalization technology, the reproductive growth regulation and control technology and the gene homozygosis accelerating technology for fourgenerations of a crossbreeding generation system in one year, and the growth period of the strong winter wheat is greatly shortened under the controllable indoor culture condition, the crossbreedingprocess of the strong winter wheat is accelerated, and the breeding of four generations of strong winter wheat in one year is realized.

The invention provides a direct seedling type rice variety regional testing method. The method comprises the following steps: 1) test field preparation; 2) field design; 3) seeding preparation; 4) seed direct seedling; 5) field management; and 6) character examination. Compared with the traditional transplanting type rice variety regional test, the direct seedling type rice variety regional test provided by the invention has the advantages that the test error is low, the breeding period of a sample to be tested is short, the yield level is high, the test cost is reduced and the test efficiency are improved. In short, the method has the advantages of being correct in result, saving cost and enhancing effect. By using the method, a new good rice variety suitable for direct seedling cultivation can be accurately selected.

The invention provides a method for summer direct seeding after wheat and early maturing culture of short-season cotton. According to the method, stubble seeding is conducted on the short-season cotton after wheat, seedling emergence is quick, budding, flowering and boll opening are early, the pre-frost yield is increased, and the growth period is shorter. By means of the method, the conventional single cotton cropping bottleneck is broken, the problems that conventional direct seeding after wheat of the short-season cotton is late in maturing, low in yield and low in pre-frost yield are solved, the yield is guaranteed, the field growth time of the short-season cotton is shortened as much as possible, early maturing of the short-season cotton is achieved, and cotton-wheat double cropping is truly achieved. The method is particularly suitable for the Yellow River basin.

The invention discloses a soybean blossoming regulation gene GmCIB4 and a coding protein thereof. The soybean blossoming regulation gene GmCIB4 has a nucleotide sequence shown as SEQ ID No.1 and an amino acid sequence shown as SEQ ID No.2. The blossoming of plants (arabidopsis thaliana) can be obviously promoted through overexpressing the soybean blossoming regulation gene GmCIB4 so as to shorten the blossoming time and the growth period. The invention can be applied to solving the flowering asynchronism problem in crossbreeding, the birth control problems of various crops, vegetables, fruits and flowers, the light period sensitivity problem and the introduction problem.

The invention discloses a soybean GmFTL4 protein and a soybean GmFTL6 protein, with an amino acid sequence shown as SEQ ID No.1 and SEQ ID No.2 respectively, or an equally functional amino acid sequence formed through replacement, deletion, or addition of one or a plurality of amino acids of SEQ ID No.1 or SEQ ID No.2. The expression of soybean anthesis genes GmFTL4 and GmFTL6 can obviously promote a plant (Arabidopis thaliana) to blossom, and shorten an anthesis time and a fertility stage. In addition, the invention can be applied to solve problems of flowering asynchronism in crossbreeding,fertility stage control of various crops, vegetables, fruits and flowers, photoperiod sensitivity, and introduction.

The invention discloses a high-yield radix bupleuri cultivation method and belongs to the field of economic crop planting. Firstly, seeds are soaked with gibberellin and are uniformly mixed with peatsoil, germination is accelerated, the seeds are sowed in a field after the seeds are revealed, and simultaneously the yield and the single-plant quality of radix bupleuri by combining high-density planting and topping measures. According to the method, the radix bupleuri seeds required by field production can be bred in a small space, meanwhile, the manpower and material resources generated by weeding in an early growth period of the radix bupleuri and pesticide effect residues caused by using the herbicide are reduced due to early seedling emergence and closing. In addition, by adopting the method, the harvesting time of radix bupleuri can be shortened by half, the yield of single plants per mu is increased by 33%-66%, and the yield of single roots is increased by more than one time.

The present invention discloses a silkworm excrement cultivation media and a preparation method thereof, and belongs to the technical field of agriculture, wherein silkworm excrement, plant ash, vernicia fordii bran and sand-soil are uniformly mixed according to a volume ratio of 50:15:15:20, stacking retting fermentation is performed for usually 30-40 days, screening is performed after fermentation composting, and then uniform mixing is performed to obtain the silkworm excrement cultivation media. According to the present invention, the main raw material is the silkworm excrement and is rich in the mulberry planting and sericulture area, the silkworm excrement cultivation media can be widely used for planting of vegetables, flowers and other crops, can provide a rich nutrition for crops, and has effects of soil-borne disease reducing, quality and yield improving, solving of the environmental problems of agricultural waste, resource recycling achieving, a certain economic benefit, and a certain ecological benefit.

The invention provides a three-dimensional cultivating method of potato and corn in a dry land and belongs to the three-dimensional cultivating mode technology of crops. In the method, two crops are planted in the same field land along an east-west direction long row in a strip field band shape, a plant band is formed in 140cm width, and two rows of potato are planted in an occupied area of 65 cm width; in the two rows, the row spacing is 40 cm, and the plant spacing is 25cm; film covering is timely carried out after spring sowing is carried out; after the potato is sprouted and when the seedling is abut against the film, the film can be destroyed, and the seedling can be exposed and then is tightly covered and sealed by using soil in a ditch; in the end of March, two rows of early-maturing special corns are planted at the margin of the potato planting soil in 75 cm width; in the two rows, the row spacing is 50cm, and the plant spacing is 30cm; the seedling density per mu is 4000 plants; and after the corn is sprouted and when the seedling is abut against the film, the film can be destroyed, and the seedling can be exposed and then is tightly covered and sealed by using soil in the ditch. Compared with the prior art, the method provided by the invention has the three-dimensional, early-maturing, high-yield and efficient effects; and by using the method, the load of labors can be lightened, the requirement on the labors is reduced, the growth periods of the potato and corn are shortened, and the utilization rate of the soil is improved.

The invention discloses a rice cultivation method. The method comprises the steps of straw returning to the field, soil preparation, rice seed selection, rice seed treatment, sowing, water management,fertilizer management, disease and pest prevention and control, harvesting and straw returning to the field. According to the method, by directly sowing rice without reserving the rice field, the loss caused when crops cannot be planted on the reserved field can be reduced; meanwhile, the,transplanting, root breaking and reviving processes are not involved, early growth and quick tillering are facilitated, and the growth and development period is shortened; the same variety is sowed at the same time, and the growth and development of the directly sowed rice can be about 10 days shorter than that of transplanted rice.

The invention relates to protein related to the flowering time of plants and applications of the protein. The protein is shown as follows: A1) the amino acid sequence of the protein is shown as a sequence 2 in a sequence table; A2) the protein obtained by substituting and / or deleting and / or adding one or more amino acid residues to the amino acid sequence shown as the sequence 2 in the sequence table has more than 90% identity with the protein shown in the A1) and is related to the flowering time of plants; and A3) the fusion protein is obtained by linking the N-terminal or / and C-terminal of the A1) or the A2) and protein tags. An extended protein gene PtoEXPB3 is obtained from populus tomentosa. The gene is introduced in tobacco; and compared with wild type tobacco, the flowering time oftransgenic tobacco flowers can be advanced by 21 days, so that the PtoEXPB3 can have the function of early flowering and can be taken as an important gene resource of the molecular breeding of ornamental plants.

The invention provides a plant growth regulator for improving upper leaf enlargement, nicotine reduction and potassium increase after topping. The plant growth regulator is prepared by taking by weight, 0.001-99.990% of gibberellic acid, 0.001-99.990% of heteroauxin, malonic acid, 0.001-99.990% of 2,4-d, 0.001-99.990% of dimethylformamide, 0.001-99.990% of nonylphenol polyoxyethylene ether and 0.001-99.990% of cyclohexanone, mixing the raw materials with uniformly stirring to prepare mixed solution and mixing, by weight, 60-70% of the mixed solution and 30-40% of potassium dihydrogen phosphate buffer solution with uniform stirring. By spraying the plant growth regulator to upper tobacco leaves, the growth period of a tobacco field is shortened, upper tobacco leaf enlargement, nicotine reduction and potassium increase can be promoted, tobacco leaf output is increased, and ashy tobacco leaves after baking of the upper tobacco leaves can be decreased. Besides, the tobacco leaves are slightly loose in structure, slightly dark, slightly high in gloss and sufficient in aroma, a single upper leaf is slightly heavy, the proportion of high-quality and medium-quality tobaccos is effectively increased, and accordingly economic income of tobacco growers is increased.

The invention discloses a method for breeding a normal corn inbred line by using a hard grain type waxy corn inbred line. According to the method, a corn inbred line is bred with a method of one-time hybridization of the early-maturing hard grain type waxy corn inbred line and repeated backcrossing of normal corn, so that rapid breeding of a new normal corn species with excellent quality, high unit weight and early maturity is realized. With the adoption of the method, the quality of the normal corn inbred line is improved, the hereditary basis of normal corn is widened, types of the normal corn are enriched, the corn growth period is shortened, and the method has the important social significance and economic value.

The invention discloses a method for promoting precocious flowering of industrial cannabis sativa and application. The method comprises the following steps: culturing the industrial cannabis sativa until a second pair of true leaves are expanded, transplanting the cultured industrial cannabis sativa into an artificial climate chamber, and adjusting the illumination intensity of a light supplementing lamp in the artificial climate chamber to be 30-180 [mu]mol*m<-2 >*s<-1 >, the photoperiod to be 12-14 h or 10-12 h, and the temperature to be 25+ / -1 DEG C; furthermore, spraying 200 mg / L of 6-BA and 50-200 mg / L of gibberellin to industrial cannabis sativa seedlings. According to the method, aiming at the problems that industrial cannabis sativa is difficult to propagate in winter and long in growth cycle under natural conditions, the growth cycle of the industrial cannabis sativa is effectively shortened by manually regulating and controlling the light environment, changing the illumination intensity and cooperatively applying a plant growth regulator. The time from sowing to the flowering period is only 50 days, precocious flowering and fruiting are achieved, the purpose of shortening the growth period of industrial cannabis sativa is achieved, and the method is low in cost, easy to operate and high in success rate and has extremely high application value and economic benefits.

The invention provides a cultivating method for direct sowing rice. The cultivating method includes the steps that a rice field is treated and flattened, base fertilizer and a synergist are applied, and then sowing and irrigating are carried out, wherein the amount of the base fertilizer applied to each mu of the rice field is 50 kg, and the amount of the synergist applied to each mu of the rice field is 6 kg; 18-22 days after irrigating, 10 kg of urea powder with the nitrogen content being 46% is applied to each mu of the rice field; 28-32 days after irrigating, a first additive is applied to the rice field; 48-52 days after irrigating, a third additive is applied to the rice field; 73-77 days after irrigating, a second additive and the third additive are sequentially added to the rice field; 7 days after the former step is completed, the second additive is applied to the rice field again; 83-87 days after irrigating, the third additive is applied to the rice field; 93-97 days after irrigating, the third additive is applied to the rice field again. By means of the method, the growth period of traditional direct sowing rice can be shortened, diseases can be effectively resisted, and the yield per mu can be effectively increased.

The invention discloses a nutrient material for improving soil structure. Raw materials of the nutrient material for improving the soil structure are composed of, in parts by weight, 100-160 parts of river mud, 2-6 parts of ammonium nitrate, 1-5 parts of calcium superphosphate, 2-6 parts of potassium dihydrogen phosphate, 0.1-0.6 part of zinc fulvate, 0.2-0.8 part of EDTA chelated iron, 1-3 parts of zeolite powder, 20-30 parts of fishbone dust, 5-19 parts of decomposed cow dung, 5-12 parts of corn meal, 4-10 parts of limestone powder, 1-6 parts of earthworm cast, 5-10 parts of modified halloysite carbon nano tubes, 4-10 parts of bamboo charcoal, 2-8 parts of medical stones, 1-4 parts of fly ash, and 2-6 parts of quartz sand.

The invention discloses chelated multielement medium-trace-element spraying fertilizer and a preparation method thereof. The chelated multielement medium-trace-element spraying fertilizer comprises, by weight, 40-60 parts of EDTA (ethylene diamine tetraacetic acid) chelated zinc, 40-60 parts of instant boron, 16-24 parts of EDTA chelated manganese, 32-48 parts of compound EDTA chelated trace elements, 19.2-28.8 parts of mineral fulvic acid and 176-264 parts of magnesium sulfate monohydrate. The chelated multielement medium-trace-element spraying fertilizer can provide crops with various mediumtrace elements needed for growth, enhance crop resistance, increase crop yield and increase crop activity; the chelated medium trace elements do not react with substances such as phosphate radicals and sulfate radicals in the soil, and accordingly, soil hardening can be reduced; the mineral fulvic acid can promote photosynthesis of the crops and improve soil nutrients and fertility.

The invention discloses a method for rapidly identifying the purity of rape hybrids indoors. The method comprises the following step of sterilizing rape seeds, specifically, soaking the hybrid seeds with a 0.1% mercuric chloride solution for 10-15 minutes, cleaning the seeds with ddH2O for 2-3 times, carrying out low-temperature vernalization in a bud stage, putting the sterilized seeds into a culture dish paved with three layers of wet filter paper, putting the culture dish into an artificial climate chamber, placing the seeds at normal temperature for 1-2 days until the seeds germinate, putting the germinated seeds exposing white buds into an incubator at 2 DEG C or 4 DEG C, and carrying out low-temperature treatment for 2-3 weeks; and through artificial low-temperature vernalization, increase of the planting density in a seedling stage and increase of the temperature, sunshine duration and illumination intensity in the growth stage, the growth process is effectively accelerated, and the purpose of rapidly identifying the purity of the hybrids is achieved. The method has the beneficial effects that the growth process is effectively accelerated and the purity of the rape hybrids is rapidly identified through artificial low-temperature vernalization treatment of the rape seeds, coordinated control over the temperature, illumination time and illumination intensity and technical measures such as the increase of the planting density, topping and branch reduction.

The invention discloses a lean tobacco floating seedling-raising method. During a tobacco floating seedling-raising process, the bottom of a seedling pool must be flat, water is added into the seedling pool before floating seedling-raising discs are arranged in the seedling pool to perform seedling raising, the depth of the water is 1.0-2.0 cm, the corresponding amount of floating seedling-raising nutriment liquid fertilizer is added into the seedling pool, and the concentration of nitrogen in water in the seedling pool is allowed to be 100 ppm-150 ppm; during the seedling-raising process, once water (nutrient solution) in the seedling pool is used up due to evaporation and absorption (in this time, the seeding substrate must keep wet and not dry), water with the depth of 1.0-2.0 cm and the corresponding amount of nutriment liquid fertilizer are instantly added into the seedling pool, and the concentration of nitrogen in water in the seedling pool is allowed to be 100 ppm-150 ppm, that is repeated till the seedling raising process is finished. The lean tobacco floating seedling-raising method further includes disinfection of the seedling-raising discs, substrate filling, sowing, seedling thinning, temperature and humidity management, leaf cutting and seedling training which are identical to that of the conventional tobacco floating seedling-raising methods. The lean tobacco floating seedling-raising method is lean and can save fertilizers and water, the cultivated tobacco seedlings can germinate and emerge in advance, the whole seedling growth period is shortened by more than 7 days, and the cultivated tobacco seedlings are health and strong and are developed in root systems.