39results about How to "Extended picking period" patented technology

The invention belongs to the technical field of planting the traditional Chinese medicinal materials. The invention discloses an efficient cultivation method of saffron, and in particular relates a standardized saffron planting method including mechanized field corm planting and industrialized indoor stamen culture. The efficient cultivation method of saffron improves the per unit yield of the saffron, and also greatly improves the mechanized operation level, saves the labor, and realizes standardized, mechanized and large-scale production of the saffron; the shortcomings of small-area scattered cultivation, lack of labor for seasonable sudden work and high labor cost of the current manual workshop type cultivation method of the saffron in China are solved.

The invention provides a humic acid water-soluble fertilizer which comprises the following components (expressed in mass percent): 0.8 to 8.4% of potassium fulvicate, 5.6 to 21.4% of diammonium phosphate, 0.12 to 0.54% of ammonium molybdate, 0.125 to 0.575% of copper sulfate, 0.1 to 0.4% of ferrous sulfate, 0.8 to 3.6% of boric acid, 3.8 to 12.5% of potassium dihydrogen phosphate, 0.75 to 1.75% of zinc sulfate, 0.25 to 1.15% of manganese sulfate and 57.5 to 75.5% of water. According to the invention, fulvic acid and essential nutrients for plants are used as components of the fertilizer, plant nutrients are in a reasonable ratio, and the humic acid water-soluble fertilizer is characteristic of capacity of significantly promoting early maturity of and preventing premature senility of grain crops and economic crops like fruits and vegetables.

The present invention discloses a composite synergist containing polyglutamic acid and potassium fulvic acid. The composite synergist comprises the polyglutamic acid and the potassium fulvic acid, wherein the weight ratio of the polyglutamic acid to the potassium fulvic acid is 1:(0.001-0.5). The invention also discloses an application of the above composite synergist containing the polyglutamic acid and the potassium fulvic acid. The synergistic fertilizer prepared by using the composite fertilizer synergist provided by the invention effectively promotes the growth and development of crops, increases the yields of food crops, leafy vegetables and melon and fruit economic crops, and significantly improves the utilization rate of the fertilizer.

The invention relates to a glossy ganoderma cultivation method capable of substantially reducing wood consumption. The method comprises the following steps of selecting tree species, trimming branches, sawing a tree into wood segments with the length of between 16 and 18 centimeters, cutting, leveling, bagging, using ropes to bind the mouths of bags, sterilizing, inoculating, disinfecting, laying the bags into soil, covering the bags with oil for 15 to 50 centimeters of soil, nourishing strains, hastening buds, producing glossy ganoderma, harvesting, grading and packaging. The method can increase the picking period of the glossy ganoderma by 2 to 3 years, save cost by more than 60 percent, reduce pollution by more than 15 percent, can greatly reduce wood consumption, and increase economic benefit.

The invention discloses a method for preparing myrtle leaf green tea. The method comprises the following steps: picking up fresh leaves; tedding fresh leaves; killing for the first time; killing for the second time; twisting; drying to obtain the myrtle leaf green tea. According to the method, the suffruticosa plant myrtle leaves are used as a raw material, twice killing-out processes are adopted, high-temperature killing-out and low-temperature killing-out are combined, so that the green smell of the myrtle leaves can be effectively removed, and the influence of villus on the back of the leaves to the taste of green tea can be reduced. The prepared myrtle leaf green tea has a good color and rich smell, is enriched with multiple amino acid, vitamin and the like required by human bodies, and has health-care effects of treating chronic dysentery, rheumatism and hepatitis, and reducing blood fat and the like due to phenols, tannin and the like in the myrtle leaf green tea.

The invention discloses a jasmine single-stem shape pot cultivating method. The method obtains the jasmine shape through the steps of pot selection, substrate selection, cutting, water and fertilizer management, single-stem shape cultivating and the like. The jasmine single-stem shape pot cultivating method cultivates jasmine of shrub into the single-stem shape through a pot cultivating method, solves the problem that an existing jasmine is not obvious in stem, multiple in branch, short and small in crown, low in efficient light utilization, prone to internal baring and fewer in flower. The jasmine cultivated through the method is high in stem thickness and crown, tall and straight in stem, large and multiple in flower and bright in color and has greatly-improved ornamental values.

The invention provides a composite microbial disease / insect-resistant agent for green vegetables and a manufacturing method thereof. The composite microbial disease / insect-resistant agent for green vegetables comprises a composite microbial inoculant and a fertilizer, wherein the composite microbial inoculant is a mixed microbial inoculant formed by fermenting Bacillus and Rhodospirillum in a culture medium; the fertilizer comprises a potassium fertilizer and a pH regulator; the mass ratio of the composite microbial inoculant to the fertilizer is (30-50):(50-70); and the mass ratio of the Rhodospirillum microbial inoculant to the Bacillus microbial inoculant is (1-3):1. By adopting the composite microbial inoculant, the agent has the advantages of sufficient nutrients and reasonable supply, can enhance the nutrient absorption capacity of the plant root, and effectively inhibits harmful bacteria from growth and reproduction. When being used for a long time, the agent can improve the soil and avoid multiple diseases and insects due to deficiency of nutrient elements.

The invention discloses a biological water flush fertilizer and a preparation method thereof. The biological water flush fertilizer is prepared from the following raw materials in parts by weight: 1-2parts of a complex microorganism bacterium solution, 15-20 parts of amino acid raw powder, 5-10 parts of brown sugar, 10-12 parts of urea, 3-5 parts of potassium sulfate and 3-5 parts of potassium dihydrogen phosphate. The complex water flush fertilizer takes a sugarcane extract as a main raw material which is compounded with the following raw materials in parts by weight: 1 part of bacillus licheniformis, 1 part of lactic acid bacteria, 1 part of filamentous bacteria, 1 part of saccharomycete, 1 part of actinomyces, 1 part of photosynthetic bacteria and 1 part of bacillus natto. The producedbiological water flush fertilizer is comprehensive in nutrition, good in water solubility, high in utilization rate and long in lasting period, has a biological control effect, and is environmentallyfriendly, and organic-inorganic-microorganism combination is realized.

The invention discloses a cultivation method for a jasmine pot culture. The cultivation method comprises the following operating steps: (1) cottage branch selection: selecting jasmine branches which grow well, develop normally, and are free of disease and pest damage, and trimmed by farmers; (2) substrate selection: uniformly mixing a mixture of red soil and mulberry branch bagasse pith with the weight ratio of 1:(2-3), placing the mixture for a week, and then putting the mixture in a container to obtain a culture substrate; (3) cuttage: selecting good jasmine branches, soaking the lower parts of the jasmine branches in a disinfection rooting solution for 0.5-1 minute, and then inserting in the culture substrate; (4) water and fertilizer management: carrying out cuttage on the jasmine branches, then thoroughly watering the culture substrate with clean water, then thoroughly watering with water when the culture substrate is dry but not cracked, watering with water in morning, and watering with frequently-used water fertilizer at night; (5) top application trimming; (6) finished product marketing: after top application trimming, marketing after new branches of the jasmine branches grow until 15-20 cm. The jasmine pot culture cultured and obtained through the method is high in survival rate, and the culture is short and fat and has more flowers.

The invention discloses a novel soluble fertilizer with a humic acid biological activity. The novel soluble fertilizer comprises the following components: 8-15wt% of potassium humate, 5.6-10.5wt% of diammonium phosphate, 5-8.8 percent of urea, 3.8-5.6wt% of boric acid, 3.8-12.5wt% of monopotassium phosphate, 2.8-4.5wt% of active compound amino acid preparation, 0.5-1.5wt% of plant active agent, and 57.5-75.5wt% of water. The novel soluble fertilizer has three effects of nutritional supplement, antibiosis and virus resistance, and has the advantages of effectively improving soil, being durable in fertilizer effect, enabling the root system of the plants to be developed, enhancing the disease resistance, effectively improving the crop quality, having an effect of preserving moisture and fertility, activating immobilized nutrients in soil so as to ensure that sufficient nutrients can be obtained for the crops in the whole reproductive period, preventing premature senility, and prolonging the picking period.

The invention discloses a facility cultivation method of a winter jujube tree. The facility cultivation method of the winter jujube tree comprises the circulatory management steps of selecting varieties, planting and establishing a garden, performing ridging cultivation, performing management before covering a greenhouse, performing management in the greenhouse, performing management after harvesting and performing management before covering the greenhouse, wherein the step of performing ridging cultivation also comprises the steps of performing fertilizer and water management and performing shaping and pruning management; the step of performing management in the greenhouse comprises the steps of performing environmental regulation and control, performing artificial pollination, thinning flowers and fruits, and performing plant disease and insect pest prevention management; and the step of performing management after harvesting comprises the steps of performing branch thinning management, delaying short pruning, pulling branches and applying a base fertilizer in autumn. By the method, through building of a warm winter type greenhouse and through adjustment of the growth and development condition of the winter jujube tree under the facility condition, the ripening time of the winter jujubes are more dispersive, the picking period is longer, the yield is higher and the fruit product is more excellent.

The invention discloses a cultivation method for improving the ornamental quality of an organic gold finger grape bonsai. The method comprises the steps of container selection, preparation of nutritional soil, selection of nursery stocks, planting, daily management, manufacturing of an auxiliary frame, tree form cultivation, flower and fruit management, disease and pest control and pot replacement. The nutritional soil contains secondary metabolites of an orchard, reed powder, coco coir, turfy soil, vinegar residues, rice chaff, perlite, vermiculite, yellow sand, soil and decomposed animal manure in the volume ratio of (1-2):1:1:1:1:1:1:1:1:(1-2):(1-2). The prepared nutritional soil is sieved and exposed in the sun, the porosity is 55-70%, and the pH value is adjusted to be 5.5-7. The gold finger grape bonsai cultivated through the method is reasonably distributed in a limited space, clusters are uniform, the fruit quality is good, residues of pesticides and fertilizers are avoided, and the ornamental quality is high.

The invention discloses a method for planting zinc-rich chrysanthemum nankingense. The method comprises the following steps: (1) germination and seedling culture; (2) transplantation and final singling; and (3) harvesting. According to the method for planting zinc-rich chrysanthemum nankingense, seeds are adopted to cultivate plenty of seedlings, germination conditions are controlled strictly, the germination rate is high, seedlings grow vigorously, and the growth vigor is uniform; a non-woven fabric for laying is used, is favorable for water absorption, moisture preservation and breathability and can be reused, and the cost is reduced; soilless culture is performed after the transplantation, growth conditions are controlled strictly, hard-light, intermittent and long-time illumination is adopted, chrysanthemum nankingense branching and germination are promoted, flowering is delayed, the picking period is prolonged, and the yield is improved obviously; the content of zinc and selenium in nutrient solution is high, minerals are comprehensive, promote absorption and utilization and are favorable for growth, a health care function is enhanced, and the zinc-rich chrysanthemum nankingense can clear away heat and toxic materials, is resistant to oxidization, aging and tumor, enhances immunity, promotes gastrointestinal functions and protects heart and cerebral vessels; the nutrient solution is rich in microorganisms, the disease resistance is improved, the use of pesticides is avoided, and the planting cost is reduced.

The invention discloses a Chinese herbal medicine extraction nutrient solution, a preparation method and an ecological planting method. The Chinese herbal medicine extraction nutrient solution is prepared from the following raw materials in parts by weight of 10-15 parts of fermentation liquor, 1-5 parts of trace elements, 5-10 parts of amino acid and 300-400 parts of RO water. The fermentation liquor comprises elecampane, scutellaria baicalensis, dandelion, fructus forsythiae, coptis chinensis, cortex pseudolaricis, galangal, golden cypress, cinnamon, clove, mangnolia officinalis, radix sophorae flavescentis, radix salviae miltiorrhizae, rosemary, radix stemonae, radix gentianae, quisqualis indica, artemisia apiacea, dendrobium officinale, herba violae, smoked plums, euphorbia helioscopia, saccharomycetes, bifidobacteria, bacillus subtilis and pseudomonas. The planting method comprises the steps of applying base fertilizer to a farmland; after crops are transplanted, mixing a microbial agent with water for root irrigation; and spraying the Chinese herbal medicine extraction nutrient solution to crop leaves. The method has the advantages that less pesticide is sprayed or even no pesticide is sprayed, the crops using the nutrient solution can appear on the market in advance, the harvesting period is prolonged, the quality of agricultural products is greatly improved, and the problems of soil acidification, heavy metal pollution and the like in the planting environment can be remarkably solved.

The invention discloses a preparation method and a processing device for Chinese medicine agricultural medicinal fertilizer, relating to the technical field of medicinal fertilizer processing devices.The processing device comprises a box body, wherein the top of the inner wall of the box body is slidably connected with a first chassis, and a first motor is fixedly connected to the top of the inner wall of the first chassis. The preparation method and the processing device for Chinese medicine agricultural medicinal fertilizer have the advantages that raw materials are easy to obtain, all of the raw materials are pure natural substances of traditional Chinese medicine and are safe and environmentally friendly in the production process and after application, the production cost is low, theapplication range is large, various kinds of crops can realize production increase and income increase, moreover, various pests and diseases can be prevented and controlled, and therefore, without using chemical fertilizers and pesticides, farmers can grow high-yield good-harvest vegetables, fruits and cereals having perfect combination of color, aroma and taste without any heavy metals or any harmful residues; when the processing device is in use, materials are quickly mixed to reduce the mixing time, so as to prevent a subsequent normal use effect, and to prevent excessive local heating anduneven heating.

The invention belongs to the technical field of eucommia culturing and particularly relates to a method for increasing the yield of eucommia seeds in a eucommia female strain fertilizing garden. The method comprises the following steps of growing eucommia seedlings, grafting the seedlings, planting the seedlings, shaping the seedlings, shearing trees, picking seeds, removing impurities from the seeds, after removing impurities from the seeds, airing the obtained eucommia seeds or drying the eucommia seeds at the temperature of 120 to 150 DEG C, and cooling the seeds by cold air with the temperature of 25 to 35 DEG C. By the method, the yield of available eucommia seeds in the eucommia female strain fertilizing garden can be increased by 30 percent and is about 400kg / mu; the quality of the eucommia seeds is obviously higher than that of the traditional way; the flowering period and the picking period are prolonged to 70 to 75 days; the picking cost is reduced by over 50 percent and is about RMB 2.5 yuan / kg; furthermore, the problems that the using density of workers is high and the organization difficulty is high in the same period are also solved; the wet eucommia seeds are dried by a drying process, so that the problems that the airing time is long, a large number of fields are occupied, and waste is high because of weather factor are solved.

The invention relates to the field of fertilizers and in particular relates to a urea ammonium nitrogen fertilizer and a preparation method thereof. The method comprises the following steps: mixing and stirring 30-50wt% of urea, 5-25wt% of ammonium sulfate, 40-50wt% of ammonium chloride and 5-15wt% of adhesive, stirring for 20-40 minutes, obtaining a mixture, and granulating to obtain the urea ammonium nitrogen fertilizer. The preparation method is simple and low in cost, and the product has the advantages of high utilization rate, rapid and long-term effect, enzyme supplement, disease prevention and comprehensive nutrition.

The invention discloses a carbon-based protein enzyme fertilizer. The carbon-based protein enzyme fertilizer comprises the following components in parts by weight: 75-82 parts of carbon powder, 38-44parts of nitrogen phosphorus and potassium, 60-78 parts of protein, and 17-23 parts of enzyme, wherein the carbon powder is a mixture of charcoal and simple substance carbon based on the mass ratio of5-8: 1-2; the enzyme is a mixture of metalloprotease, proteolytic enzyme and superoxide dismutase (SOD) based on the mass ratio of 2-3: 7-9: 1-3. The carbon-based protein enzyme fertilizer has the advantages of increasing the yield, resisting disease, resisting insect and improving quality; the yield is greatly increased and is annually increased.

The invention discloses a processing technology of Liuan guapian tea. The processing technology comprises the following steps of step 1, picking fresh leaves by a tea garden fresh leaf picking method,uniformly spreading the picked fresh leaves onto a green tea airing frame, spreading and withering in a constant-temperature green tea airing room at the temperature of 20 DEG C, and avoiding turnover of the tea leaves in the period. The processing technology has the advantages that the traditional method of picking the raw material and then breaking into pieces is changed into the tea garden fresh leaf picking method, so that the market time of the Liuan guapian tea is advanced, the output is increased, and the picking period is prolonged; by centrally spreading and withering in the constant-temperature green tea airing room at the temperature of 20 DEG C, the spreading is thorough, the fresh-keeping time of the fresh leaves can be prolonged, and the influence to the tea quality due to the deterioration of fresh leaves because of incomplete processing in the peak tea production period is avoided; compared with the traditional pot type enzyme deactivating method, the enzyme deactivating effect of a 80-type drum method is more thorough.

The invention provides a soil conditioner and a preparation method and application thereof, and relates to the field of soil improvement. The soil conditioner comprises the following components in percentage by weight: 88%-95% of purified attapulgite, 3%-8% of fulvic acid, 1%-2% of nanoscale carbonized astragalus residue powder, 0.5%-1% of nanoscale modified cellulose powder and 0.5%-1% of monosodium glutamate tail liquid. The soil conditioner can effectively increase the content of organic matters, available phosphorus and available potassium in soil, increase the pH value of the soil and reduce the content of heavy metals chromium and cadmium in the soil, so that the soil structure is effectively improved, the crop growth is promoted, and the quality of agricultural products is improved.

The invention discloses a cultivation method for prolonging the mulberry picking period. The cultivation method comprises the following steps: (1) carrying out field planting; (2) shaping and trimming; (3) carrying out fruiting period management: (A) in a young fruit period of mulberry, ringing the base of the bearing basal shoots accounting for 1 / 3 of each mulberry plant, and coating the ringing wound with a first growth regulator and wrapping, wherein the first growth regulator is mainly prepared from the following raw materials in parts by weight: 50-60 parts of aloe juice, 10-15 parts of moringa oleifera powder, 8-10 parts of unhatched egg powder, 3-5 parts of peach gum powder, 3-5 parts of artemisia apiacea powder and 2-3 parts of garlic powder; and (B) in the mulberry growth period, ringing the base of the bearing basal shoots accounting for 1 / 2 of the un-ringed bearing basal shoots of each mulberry plant; and after the ringing, spraying a second growth regulator once to the whole plant; and (4) carrying out field management. The cultivation method disclosed by the invention has the advantages of fast production, good mulberry quality, long picking period, remarkable economic benefits and the like.

The invention discloses a cultivation method of an Arabian jasmine flower penjing planted with old dwarf trees, and belongs to the technical field of penjing cultivation. To solve the technical problems that for an Arabian jasmine flower penjing planted with old dwarf trees which is cultivated by the prior art, flowers are few, quality is poor, branches are easily withered, survival rate is low, and cultivation cost is high, the following steps of S1, Arabian jasmine flower old dwarf trees selection, S2, matrix selection, S3, cultivation, S4, water and fertilizer management, S5, topdressing and pruning, and S6, finished product marketing are adopted. Nutrient soil of the penjing is screened, red soil, mixture of mulberry twigs and bagasse pith, and powdered carbon are selected as matrix, and Arabian jasmine flowers grow vigorously. The mulberry twigs which are the by-products of mulberry planting and silkworm raising, the bagasse pith which is the by-product of cane sugar manufacture, and wood processing tails are fully utilized, the obtained cultivation matrix is fertile and low in cost, large-scale operation can be achieved, and the cultivation method is easily promoted and applied. According to the cultivation method of the Arabian jasmine flower penjing planted with old dwarf trees, pot culture survival rate can be increased, cultivation survival rate is as high as 99%, the Arabian jasmine flower penjing is easily supported after being bought by customers, and ornamental value of the Arabian jasmine flower penjing is largely increased.

The invention discloses a tea garden shading net covering cultivation method and a tea garden shading net covering cultivation device. The tea garden shading net covering cultivation device comprises a shading net frame and a double layer shading net releasing-retracting mechanism, wherein as shown in figure 1, the shading net frame is formed by connecting a main upright column and auxiliary upright columns through a dragging steel rope and a fixing steel rope, the span between each two auxiliary upright columns can reach 40-60m, the shading net frame is suitable for a large area tea garden due to the large span between each two auxiliary upright columns, the double layer shading net releasing-retracting mechanism is driven by a motor, and drives a shading net to release and retract a net line through a line coiling cylinder so as to complete releasing and retraction of the shading net, and the lower layer of the shading net is 2-2.2m far away from the ground, and facilitates production operation in the tea garden. The double layer shading net is provided with two layers which are respectively low and high in shading coefficient, and then the layer low in shading coefficient can be used in spring and autumn, the layer high in shading coefficient can be used in summer and winter, and even the two layers of the double layer shading net can be used simultaneously in the winter so as to reduce frost or low temperature freeze injury, and furthermore correct management and use of the tea garden shading net covering cultivation method and the tea garden shading net covering cultivation device can facilitate improvement of growing environment of the tea garden at all seasons, prolong a picking period of tea leaves, and improve tea quality.

The invention provides a cultivation method for prolonging a kiwi fruit picking period and relates to the technical field of agricultural production. The cultivation method for prolonging the kiwi fruit picking period comprises the following steps of field planting of seedlings, fertilization management and field management. By adopting the cultivation method for prolonging the kiwi fruit pickingperiod, the purpose of prolonging the kiwi fruit picking period is achieved by integrating special fertilizer application and field management. The method has the important significance in improvementof the market share of fruits and the economic benefit of planting.

The invention belongs to the technical field of Chinese wolfberry planting nutrition fertilizers, and relates to a composite oligosaccharide microelement water-soluble fertilizer for Chinese wolfberry planting and a preparation method thereof. The water-soluble fertilizer consists of the following substances in parts by weight: 85-90 parts of zinc sulfate, 1-2 parts of vitamin C, 0.5-1 part of chitosan oligosaccharide, 2-3 parts of trehalose, and 3-5 parts of soybean oligosaccharides. By adopting the composite oligosaccharide microelement water-soluble fertilizer for Chinese wolfberry planting, the leaf thickness of a Chinese wolfberry plant is obviously increased, the yield of a planting field is obviously increased, the germination time of the Chinese wolfberry plant is advanced, the flowering period and the picking period are effectively prolonged, and the cold resistance and the drought resistance are improved. The polysaccharide content in the Chinese wolfberry is increased by about 16%, and after the fresh Chinese wolfberry are dried, the amount of dry fruits is increased by 0.1-0.3 part by weight of a dispersing agent.

The invention discloses slow release type biological potassium fertilizer, which is prepared from the following raw materials in parts by weight: 140 to 160 parts of urea, 500 to 540 parts of potassium nitrate, 120 to 130 parts of potassium dihydrogen phosphate, 150 to 170 parts of potassium chloride, 18 to 25 parts of borax, 9 to 12 parts of zinc sulfate, 4 to 6 parts of manganese sulfate, 12 to 16 parts of chitosan, 1 part of compound sodium nitrophenolate and 2 parts of bright yellow pigment. Besides meeting the nutritional requirement of the healthy and quick growth of a crop, the specially added chitosan also has the effects of preventing a disease, resisting stress, improving soil, ameliorating quality and inhibiting nematodes; meanwhile, multiple trace elements are added; the nutritional requirement during the whole growth period of the crop can be met; the utilization rate of a potassium element is particularly increased; the decrement of an application amount is facilitated; the destroy to an environment is decreased as much as possible; flower-falling, fruit-falling and leaf-falling phenomena are effectively prevented; a plant can be prevented from premature senescence.

The invention discloses an elevated layer type greenhouse strawberry planting method in the technical field of strawberry planting. According to the method, strawberries are planted in an elevated layer type planting mode, all links of strong seedling cultivation, soil preparation and field planting, temperature and humidity regulation and control, fertilizer and water management and later comprehensive management are quantized and accurately controlled, the strict requirements of the strawberries for planting conditions are met, the quality of the strawberries can be greatly improved, and the taste and nutritional value of the strawberries are improved; due to the fact that manual light supplementing is adopted, growth of the strawberries is promoted, the quality and appearance commodity are improved, the picking period is prolonged, and the income is increased; and according to the strawberry planting method, scale expansion is facilitated, industrialized strawberry seedling raising is achieved, the yield and quality of the strawberries are ensured, and the method accords with the development trend of strawberry greenhouse production in the future and has a wide development prospect.

The invention discloses a high-yield cultivation method of kale. The method comprises the following steps: sowing: selecting a flat site as a seedbed in the late summer and early autumn, uniformly laying a layer of substrate on the seedbed, watering, carrying out hole tray sowing and seedling raising, and transplanting and planting in the field: one month after sowing, when kale seedlings grow four leaves and a core, planting the kale seedlings in the field, applying decomposed human and livestock manure, and carrying out routine field management; cutting off tops: six months after transplanting and field planting, when the kale starts bolting, cutting off bolting stems and top leaves, maintaining the height of the bottom of kale at 18-22cm; spraying mist to the plants after cutting off tops, spraying mist to the plants once after aligning and cutting off tops. As for the high-yield cultivation method of kale, the bolting stems and top leaves are removed when the kale starts bolting, 300-fold diluted Bacillus thuringiensis solution is sprayed directly onto the plants and foliar fertilizer is topdressed. Thus, a lot of primary branches grow in the leaf axils of the kale, the harvesting period is effectively prolonged and can be extended to early May, and the yield is increased.

The invention belongs to a humic acid liquid fertilizer produced by utilizing urea dust recovery liquid and a preparation method of the humic acid liquid fertilizer. The liquid fertilizer is preparedfrom the following raw materials in parts by weight: 60-90 parts of urea dust recovery liquid, 5-20 parts of monoammonium phosphate, 5-15 parts of potassium chloride and 1-10 parts of potassium fulvicacid. The humic acid liquid fertilizer has the advantages that the various raw materials can be rapidly and completely dissolved, the finished product preparation time is saved, the fertilizer is easily rapidly absorbed by crops, and the urea dust recovery liquid is effectively utilized.