51results about How to "Early production" patented technology

The invention discloses a peach tree shape applicable for high-density planting. The peach tree shape of the invention is Y-shaped, and consists of a trunk and two large branch groups. Two large fruit branch groups can be produced on the upside of the trunk, and are arrayed oppositely in a line, and respectively extend into the two side rows; the extension direction is perpendicular to the row direction, as well as has a 45-55 degrees angle with the vertical direction. Fruit branches and small sized fruit branch groups are produced on the large fruit branch groups. The peach tree shape of the invention is applicable for high density planting, the structure of the tree is simple, the pruning is simple, the forming is quick, and the cost is low. The method of the invention is easy to be learned, the operation is simple. Standard management can be conducted for the invention to ensure that the peach orchard realize early rich and high-quality yield, high yield and stable yield.

The invention discloses a repatching method for the top liner of a blast furnace hot-wind pipeline. According to the damage condition of the liner of the pipeline, a pipeline steel housing (1) is provided with a hole, and the periphery of the inner surface of the pipeline steel housing (1) is welded with lifting hooks (6) and a wood mould supporting is supported well (5), and then a working layer pouring material (8) and a warm keeping pouring material (7) are poured, and then the pipeline steel housing (1) is welded well; a pipeline skin is welded with more than two mudjacking holes (9), and mudjacking material is pressed into the gap between the steel housing (1) and the warm-keeping pouring material (7), and the construction pressure is kept between 2 to 3kg / cm2. The invention resolves the emergency gusty repatching problem for the damage of the blast furnace hot-wind pipeline, so that the liner of the blast furnace hot-wind pipeline is repaired fast , thus improving the construction effect of the pipeline repatching.

The invention discloses a Jiuqian plum tree engrafting and cultivating method, comprising the following steps: planting the cultivated annual bitter plum rootstock seedlings in the seedlings-raising land in rows, in each December to establish a bitter plum free-stock nursery; selecting the bearing tree vegetative-shoots of Jiuqian plum trees as the scion cultivation stock trees to establish a scion nursery; collecting the vegetative shoots on the scion stock trees as scions to engraft in the middle ten days of next February; promoting the growth and harvest of the Jiuqian plum tree using management practices, plant growth regulator, shaping and trimming. The engrafting and cultivating method can stunt the Jiuqian plum trees, reduce the juvenile phase, advance the harvest phase, increase the yield and realize the scale planting.

The invention discloses a hydrocracking startup method. The hydrocracking startup method comprises the following steps: introducing low-nitrogen startup oil, hydrogen and a sulfurizing reagent into a hydrocracking unit; then carrying out sulfuration on a hydrocracking catalyst at a constant temperature of 220 to 260 DEG C; after the content of hydrogen sulfide in to-be-cycled hydrogen reaches 3000 to 5000 ppm, reducing the adding rate of the sulfurizing reagent and increasing the bed temperature of the hydrocracking catalyst; when the bed temperature of the hydrocracking catalyst reaches 310 to 330 DEG C, increasing the adding rate of the sulfurizing reagent; and continuing constant-temperature sulfuration, then allowing the temperature to rise to 340 to 350 DEG C and introducing raw oil for a reaction, wherein the amount of the hydrocracking catalyst is 0.5 to 8% by weight. The method provided by the invention is short in time for startup, raw material switching and entry into a stable production state, avoids the consumption of a passivating agent and potential hazards during ammonia injection in the startup process, reduces energy consumption, and decreases pollution of the passivating agent to environment and harm of the passivating agent to human beings.

The invention relates to a development method of a blind shaft frame for surface and underground parallel construction, which belongs to underground mining and shaft construction techniques, in particular to a construction method of a main shaft development system. The method comprises the following steps that a sinking headframe is arranged on the ground; a shaft neck section is dug downward; a shaft hole, a shaft body and all horizontal horseheads are constructed; the sinking headframe is removed; a sheave wheel platform is arranged on the ground; a shaft tower foundation is constructed; slip-form construction is performed, so that the height of a shaft tower is 10 m; a hoisting rope is arranged in a penetrating manner; all horizontal development tunnels and chambers under a main shaft are constructed; additionally, a slip-form technique is adopted to construct the shaft tower on the ground, and surface and underground installation is performed at the same time. The development method has the advantages of novel concept, safety, reliability, surface and underground parallel construction and obvious benefits, the labor productivity is improved, the construction period is shortened, and a shaft is put into operation in advance.

The invention relates to a breeding technology of improved varieties, in particular to a breeding technology of improved varieties of plum and apricot seedlings. The improved varieties of seedlings are cultivated by the following steps: breeding field selection, pre-sowing treatment and germination cultivation, scion grafting, post-grafting treatment and seedling outplanting. The pre-sowing treatment is sand storage lamination. The breeding technology of improved varieties of plum and apricot seedlings provided by the invention has the advantages of disinfecting through pre-sowing treatment, preserving the good and rouging and preventing and controlling diseases and insect pests in germination cultivation and post-scion treatment, and ensuring no virus in seedling production; by raising seedlings in nutrition pockets, the root systems of young seedlings are all in the nutrition pockets, and the whole pockets with soil are transplanted while transplanting, so that the survival rate is improved, and the average survival rate is 96% or more; the main root number of the root systems of the seedlings obtained by breeding is at least five, the average length of main root and lateral root is at least 5cm greater than that of the conventional seedling breeding, the stem width is 0.8 to 1.2cm, and the full bud number of a training belt is more than 10. The plum and apricot seedlings bred by the invention have developed root systems, are robust and non-toxic, and have high survival rate and early production period.

The invention relates to a method for transplanting matured honey peach seedlings. The method comprises the steps of selecting flat land, which is nearby a peach orchard, is convenient in transportation and has water supply and irrigation conditions, as a honey peach nursery-grown plant nursery garden, adopting cylindrical seedling raising containers with the specification of 40cm*40cm or 40cm*50cm and good permeability, preparing nutritional soil applicable to honey peach growth, planting the containers in the seedling raising nursery garden in a unified manner, carrying out cultivation management such as fertilizer application, weed control and disease and insect pest control and technical measures such as pruning and tree form culture on nursery-grown plants, carrying out seedling raising for 2 years in the nursery garden, and then, carrying out planting or peach orchard updating in a matured-seedling ball-planting manner. According to the method, the technical problem in a honey peach reconstructed peach orchard renovation and reformation process of honey peach cultivation areas particularly the South that the primary-stage invested cost is too high can be effectively solved, the cultivation time of young seedlings is shortened, the advanced on production is promoted, and the damage to peach trees caused by obstacles to continuous cropping is relieved.

The present invention relates to “an Innovative Semiconductor Fab's Defect Operating System” thereof for design house and manufacturing Fab is provided. The Innovative Semiconductor Fab's Defect Operating System comprises: receiving pluralities of defect data, IC design layout data; analyzing the defect data, design layouts, by a Critical Area Analysis (CAA) method via a Defect Operating System located inside the Fab site; identify a killer or non-killer defect based on the open or short failure probability; sending the killer defect data to the design house via internet, FTP, etc. The design house receives the wafer testing yield data; pick the bad die information and the killer defect information for failure analysis; correlate the corresponding defect data with the wafer test data; sending the failure killer defect data to the Fab via internet, FTP, etc.; and improve the wafer yield through feed forward defect data and feedback of failure killer defect data which is an innovative “Defect Operation Platform” implementation between design house and Fab.

The invention relates to a method for breeding high-yield fast-growing seedlings of high-odor phoenix single-clump tea. The method for breeding the high-yield fast-growing seedlings of the high-odor phoenix single-clump tea comprises the steps: selecting and breeding root stock seedlings, transplanting, cultivating and disposing the root stock seedlings, selecting and disposing scions, grafting on the lower portion under the skin of the scions, keeping wet and keeping warm by sleeve covers, carrying out shading, shearing bags, removing covers and removing binds, pinching, keeping loose and the like. According to the method for breeding the high-yield fast-growing seedlings of the high-odor phoenix single-clump tea, tea seeds of a phoenix narcissus variety are selected and used for being cultivated to form the root stack seedlings, then half-lignification robust branch tips of phoenix single-clump brand-name and high-quality old tea trees serve as the scions to be grated to the root stack seedlings, not only can new seedlings of tea trees be bred rapidly, but also yield is high, quality is good, and excellent properties of the phoenix single-clump brand-name and high-quality old tea trees are completely kept after the bred new seedlings are put into production. The method for breeding the high-yield fast-growing seedlings of the high-odor phoenix single-clump tea is a tea-tree seedling method which has popularizing significances.

The invention discloses potassium phosphite water soluble fertilizer containing nitrogen, phosphorus and potassium for fruit trees and a production method of the potassium phosphite water soluble fertilizer. The potassium phosphite water soluble fertilizer comprises raw materials as follows: 21-69 parts of phosphorous acid or potassium phosphite, 3.5-6 parts of phosphoric acid or phosphate, 8-41 parts of potassium hydroxide, 6-9 parts of nitrogen fertilizer, 2-30 parts of medium and trace elements, 5-20 parts of complex amino acids, 0.01-0.3 parts of a plant growth regulator. The production method of the potassium phosphite water soluble fertilizer mainly comprises the steps as follows: (1), weighing raw materials; (2), mixing and stirring the raw materials; (3), performing PH neutralization adjustment; (4), adding medium and trace elements; (5), measuring performance; (6), performing freezing; (7), adjusting the product to obtain the potassium phosphite water soluble fertilizer containing nitrogen, phosphorus and potassium for the fruit trees. The product is detected in accordance with the national industry standard of water soluble fertilizer containing nitrogen, phosphorus and potassium NY 1107-2010, the total content of nitrogen, phosphorus and potassium is larger than 500 g / L, and the problems that +3 phosphorus cannot be detected and the total nutrient content of the product cannot reach 500 g / L when previous potassium phosphite aqueous solutions are detected in accordance with the national industry standard of water soluble fertilizer containing nitrogen, phosphorusand potassium NY 1107-2010 are solved.

A general purpose plant growth medium incorporating shredded coastal redwood bark.

The invention provides a cultivation method for putting planting loquat grafting shoots into production in advance. The cultivation method comprises the following steps of nursery stock cultivation, planting pit preparation, seedling planting and management after planting. The cultivation method is characterized in that a period from nursery stock sowing to outplanting is within one year and is shorter than a traditional seedling culture period by 1-2 years; and in addition, during nursery stock planting, roots, branches and leaves are not damaged, so that after nursery stock planting is carried out, a rejuvenation period is short, a planting survival rate is high and a way crops are growing is tidy. In addition, by use of the cultivation method disclosed by the invention, after planting is carried out, time for forming a crown which is put into production is shortened to two years, and is shortened by more than one year than the time for traditional plantation big seedlings to be put into production, i.e., by use of the cultivation method disclosed by the invention, the crown can be relatively quickly formed, and therefore, loquat saplings can be put into production in advance so as to shorten a garden building period, i.e., reduce garden building years and lower garden building cost.

The invention relates to an orchard building method capable of shortening the building time of a cunninghamia lanceolata seed orchard. The orchard building method comprises the following steps: selecting cunninghamia lanceolata seedlings in large nutrition bags to perform stock cultivation and planting; performing grafting twice in spring and autumn every year; complementarily planting large-container grafted seedlings to ensure forest form orderliness; performing management after grafting. According to the method, the traditional building time of 4 to 5 years is shortened to 2.5 to 3 years, the orchard building efficiency is improved, and the survival rate of grafting is improved; meanwhile, stock plants in the seed orchard are uniform in size, and the forest form is ordered. According to the method, early production of a fine cunninghamia lanceolata seed base can be realized, the seed yield is increased, fine seeds can be supplied in time, and the production and breeding progresses of fine cunninghamia lanceolata seeds are accelerated.

A method for applying the fertilizer and water to grapevine to limit its root domain includes the method A for applying nutritive liquid and the method B for irrigation. The said method A features that the integrated high-concentrating liquid fertilizer is applied twice per week before the kernel hardening period and the low-concentration one is then applied after the kernel hardening period. Said method B features that the irrigation standard is that the water potential in soil is 158.5 kPa before germination, 31.5 kPa from germination to the fruit softening period, and 158.5 kPa in later phase.

The invention discloses a light complement system for pitaya growth and a plant growth lamp used by the system. The light complement system comprises the plant growth lamp, a height adjusting module,a plant canopy layer height monitoring module and a controller, the plant growth lamp, the height adjusting module and the plant canopy layer height monitoring module are connected with the controller, the plant canopy layer height monitoring module is used for monitoring the height of a plant canopy layer in real time, the height adjusting module is used for adjusting the height of the plant growth lamp, the plant growth lamp comprises a single chip microcomputer, a driving circuit, a red-light LED (light-emitting diode) and a blue-light LED, and the single chip microcomputer is connected with the red-light LED and the blue-light LED through the driving circuit and used for controlling power of the red-light LED and the blue-light LED. Red light and blue light are combined according to asuitable proportion, optimal light complement height is implemented, pitaya maturation can be early achieved, pitaya yield can be improved, and pitaya quality is improved.

The invention discloses a method for building an early high-yield cutting orchard by macadamia nut grafted seedlings, and belongs to the technical field of reproduction of improved varieties of foresttrees. The method includes the steps of cutting orchard building and management, and cutting tree management and regulation. Particularly, a yellow loam flat land or hilly sloppy land facilitating drainage and irrigation is selected to build the orchard, the mean annual temperature of the land is 19-23 DEG C, the extreme low temperature of the land is higher than or equal to 1.5 DEG C, the annualrainfall of the land is larger than 1100mm, the altitude of the land is smaller than 800m, and the soil layer of the land is larger than 50cm. Grafted seedlings (with the height larger than or equalto 130cm, the sprouting thickness larger than or equal to 1cm, the sprouting length larger than or equal to 70cm and the branching number larger than or equal to 6) of 3-5 local mainly-planted macadamia nut fine varieties are planted, soil, water and fertilizer management and pest control are performed, cutting can be performed in autumn and winter of the year of planting, and management is enhanced to improve production and quality of cuttings after cutting. The macadamia nut cutting orchard is built by the method, and production is early as cutting can be performed in autumn and winter of the year of planting. The cuttings reaching design capacity are improved by 3 times or more as compared with conventional cuttings, and yield is high. The thickness of most cuttings is 0.5-1.0cm, internodes are uniform in density, and the cuttings are high in degree of lignification and excellent in quality.

The invention discloses a construction method of a cast-in-place pile by an artificial digging hole under the extreme cold climate in winter. The construction method comprises the following steps: (1) when a pile diameter is designed, reducing pile number and increasing the pile diameter on the basis of not increasing cost; (2) employing hole-digging workers with the experience of winter construction in north, and providing the essential winter construction labor protection appliances for the artificial digging hole work, and arranging a soft ladder at the hole opening of the hole digging work; (3) carrying out hole-digging work tool and stirring of a pile core concrete under the heating condition; (4) transporting concrete by adopting a concrete tanker, coating heat insulation cotton at the periphery of a charging tank of the concrete tanker; (5) keeping that the pouring height of the pile core concrete is at least 1.0m higher than the standard height of the designed pile roof, covering the heat insulation material simultaneously and covering soil at the upper part of the heat insulation cotton. The construction method has the following advantages: by applying the construction method of the system, the unceasing project construction under the extreme cold climate in winter can be guaranteed, the work limit of the project can be speeded up, thus the project is put into production as early as possible to bring the investment benefit for owners early.

The invention discloses an edible mushroom matrix synergist and a preparation method thereof. The matrix synergist disclosed by the invention is composed of zeolite powder, wood vinegar, compound sodium nitrophenolate, monopotassium phosphate, magnesium sulfate and sodium chloride, and can achieve the effects of providing mineral substances and trace elements needed by edible mushrooms, controlling slow release of nutrients such as the wood vinegar and the like, promoting growth and development of mycelia and fruiting bodies and improving the biological transformation efficiency of the culture. The matrix synergist disclosed by the invention is applied in a form of mixing the culture material (base), is very simple and convenient in application, low in price, small in addition amount, safeand pollution-free, can achieve effects of shortening the cultivation cycle of the edible mushrooms and increasing the yield of fruiting bodies of the edible mushrooms, and has application and popularization prospects in production.

The invention discloses a cultivation method for bringing tea trees into production in advance. The cultivation method includes steps of (1), clearing lands, applying fertilizers, carrying out watering and covering the lands with black mulching films; (2), dipping the roots of tea seedlings in root liquid for 10-15 s before the tea seedlings are transplanted; (3), transplanting the tea seedlings, to be more specific, digging holes in the mulching films and planting the tea seedlings in double-row and double-plant modes; (4), carrying out watering and soil covering, to be more specific, sufficiently watering the tea seedlings with root colonizing water, then carrying out soil covering and sealing on broken openings of the mulching films but necessarily exposing soil in the ranges of 10-12 cm around the root stock of the tea seedlings; (5), applying fertilizers, to be more specific, perforating the mulching films to apply the fertilizers, or furrowing the centers of small tea rows to apply the fertilizers and applying the compound fertilizers with the pH (potential of hydrogen) values of 6-7; (6), secondarily pruning the tea seedlings and carrying out secondary topping on the tea seedlings. The root liquid comprises 800-1000 times dilution of rooting agents, 1200-1500 times dilution of bactericides and 0.4-0.6 kg / L of clay. The cultivation method has the advantages that the survival rate of the tea seedlings can be increased, and the tea trees can be brought into production in advance by a year; more than a half of weeding cost can be reduced, the quality of the tea trees can be enhanced, the yield of the tea trees can be increased, and economic value of the tea trees can be increased.

This invention provides a method of attenuating porcine pseudorabies virus, which can effectively and reproducibly attenuate porcine pseudorabies virus. The attenuated strain of porcine pseudorabies virus by use of said method can provide effective immunization for pigs.

The invention discloses a traditional Chinese medicine vinegar agent for treating chronic kidney failure. The traditional Chinese medicine vinegar agent comprises 8 parts of radix astragali, 8 parts of prepared rheum officinale, 8 parts of safflower, 8 parts of aloe, 8 parts of honey and 60 parts of edible vinegar. A preparation method of the traditional Chinese medicine vinegar agent comprises selecting radix astragali, prepared rheum officinale and safflower decoction pieces, carrying out washing, transferring the medical materials into a multifunctional extractor, adding ethanol with a concentration of 70% into the multifunctional extractor, wherein the amount of the ethanol is 10 times that of the medical materials, carrying out reflux extraction for 120min, carrying out filtration, collecting the ethanol medical liquid, adding ethanol with a concentration of 70% into the multifunctional extractor, wherein the amount of the ethanol is 8 times that of the medical materials, carrying out reflux extraction for 90min, carrying out filtration, collecting the ethanol medical liquid, merging the ethanol medical liquids obtained by the above two processes, recovering ethanol, carrying out concentration to obtain extract, adding water into medical residues, wherein the amount of the water is 10 times that of the medical residues, carrying out boiling extraction for 90min, carrying out filtration, collecting the medical liquid, removing the medical residues, merging the extract obtained by ethanol extraction and water extraction, heating and mixing the mixed extract, aloe, honey and edible vinegar to obtain a uniform mixture, carrying out fine filtration and carrying out disinfection.

The invention relates to a cultivation method for interplanting early season rice with Chinese yams. The method comprises the steps of land selection and preparation, variety selection, seed soaking and germination accelerating of Chinese yam seeds, sowing, enough Chinese yam base fertilizer application, field management, harvesting and the like. By means of the characteristics that early season rice plants are short and upright and the light requirements of the seedling stage after sowing is conducted on the Chinese yams are low, scientific and reasonable internplanting is conducted on the early season rice and the Chinese yams, the problems that pest and disease damage is caused by continuous cropping, so that the Chinese yam yield is low, and the quality is poor are solved, the yield can be increased, the early season rice and the Chinese yams can come into the market in advance, and the good economic benefit is obtained; field management is conducted in the mode of combining intertillage weeding, topdressing and pest and disease damage control is adopted, reasonable nutritional ingredients can be provided for the early season rice and the Chinese yams, and meanwhile the pest and disease damage control effect is achieved; the control effect is significant, and the phenomenon that chemical pesticide is used for treatment is avoided.

The invention discloses an early-maturing promoting method based on grape rated irrigation. The method comprises the following steps: S1, cultivation and yield control: field planting is carried out in winter, the planting density is 4.3*1.1 m, 140 plants are planted per mu, one ridge is provided with a single row, and the yield is controlled to be 1600 kg / mu; S2, frame type construction: a three-dimensional frame is adopted; S3, irrigation pipeline laying: a drip irrigation mode is adopted; S4, manual intervention temperature control: the temperature of a greenhouse is controlled to meet temperatures in different growth periods; S5, fruit grain management; S6, fruit harvesting: the harvesting basis is the fruit coloring degree, and the temperature and the water holding capacity in the greenhouse are controlled; and S7, stumping treatment: stumping is conducted to reserve main vines, and disease and pest prevention operation is conducted synchronously. The grape early-maturing promoting planting mode is standardized, scientific and automatic, the grape production quality and yield are improved, yield reduction caused by water shortage of grapes is avoided, production is stabilized,economic benefits are improved, grape cultivation risks are reduced, grapes appear on the market in advance, an N-shaped planting mode is adopted, plant light transmission and ventilation are improved, grape growth stability is promoted, and the method is suitable for market promotion.

The invention provides a high-yield fig cultivating method capable of establishing a garden by one step and based on a hardwood cutting technology. The cultivation method is characterized by comprising the steps of branch processing, land preparation and cutting, shaping and pruning, fertilizer applying management, water management and pest and disease control. According to the cultivation method, the problem of insufficient high-quality nursery stocks and a long production period are solved, and based on the hardwood cutting technology, the functions of flower bud differentiation, growth and maturity in the same year as cutting are achieved; the yield per mu in the same year as garden establishing can reach 520-540 Kg, and the cultivation method has the advantages of being fast in garden establishing, low in cost, early in going into operation and good in benefit.

The invention discloses a mulberry grafting plant cultivation one-step orchard establishing technology. The technology comprises steps: (1) grafting; (2) transplanting in real time to establish an orchard in one step, including 1) clearing up mulberry orchard land; 2) manufacturing soil balls; 3) planting in the mulberry orchard by soil; 4) managing after planting. Using the mulberry grafting plant cultivation one-step orchard establishing technology, grafting is carried out in the spring festival in the current year, planting is carried out in the current year, and the orchard is established in the current year, so production is early, and the technology is characterized by low cost, fast orchard establishing, early production, well adaptability, and good benefits. A conventional planting mode of cultivating grafting plants in the first year, cultivating to form an orchard in the second year, and getting benefits of the orchard in the third year is changed. The technology is advantaged by labor-saving, cost-saving, and efficient.

The invention discloses a graded energy utilization system used in cement production. The defects in the common cement production, such as high power consumption, low energy utilization efficiency and high manufacturing cost, are overcome by adopting the multi-stage energy utilization method; and further, waste heat utilization is integrated with energy utilization on the whole, so that the entire energy utilization efficiency is greatly improved.

The invention discloses an energy-saving and temperature-increasing strawberry elevated medium cultivation device. The device comprises a groove seat, an inner cultivation groove formed in the grooveseat and a drainage channel located at the part between the groove seat and the inner cultivation groove; the inner cultivation groove comprises groove walls and a groove bottom, the groove walls arearranged on two sides of the groove bottom, and a space for accommodating cultivated mediums is formed in the part between the groove walls and the groove bottom; a plurality of first drainage holes for draining are formed in the groove bottom; a plurality of second drainage holes for draining are formed in the groove seat. According to the device, the drainage channel is formed in the part between the inner cultivation groove and the groove seat, water-gas contradiction of the cultivated mediums is better solved to improve the heat-preserving performance of the cultivation groove, and the difficulty of heat-preserving covering of large greenhouses and the problem of higher cost of heating energy consumption are relieved.

The invention discloses a method for breeding high-quality white pepper breeding materials. The method includes the following steps: the first step is to select a single plant of green pepper and cross the single plant of white pepper to obtain the F1 generation; the second step is to use the obtained The F1 generation is self-crossed to obtain the F2 generation. Select an excellent individual plant in the F2 generation with white fruit and comprehensive traits close to the green pepper, and then backcross with the white pepper to obtain the BC1 generation; the third step is to self-cross the BC1 generation to obtain the BC1 F2 From these generations, select excellent white pepper plants, and carry out seven generations of self-purification to obtain stable and excellent white pepper inbred lines. In the present invention, the excellent genes of the white pepper and the green pepper are aggregated together by crossing, separating, and backcrossing the green pepper and the white pepper, and the selected white pepper material not only has the spicy taste and quality of the white pepper, but also has the characteristics of the green pepper. Fruit-setting, stress resistance and high yield. In order to meet the needs of the market, an effective breeding method is provided for the breeding of fine white pepper varieties.

The invention discloses a hydrocracking commencement method which comprises the following steps: firstly, introducing low-nitrogen commencement oil, hydrogen and a vulcanizing agent into a hydrocracking device, carrying out constant-temperature vulcanization on a hydrocracking catalyst at 220-260 DEG C, when the content of hydrogen sulfide in circulated hydrogen is up to 3000-5000ppm, reducing theaddition velocity of the vulcanizing agent, and increasing the temperature of a hydrocracking catalyst bed layer, when the temperature of the hydrocracking catalyst bed layer is up to 310-330 DEG C,increasing the addition velocity of the vulcanizing agent, continuously carrying out constant-temperature vulcanization, increasing the temperature to 380-390 DEG C, and introducing raw material oil to carry out a reaction, wherein the hydrocracking catalyst has 0.3-4% by weight of a nitrogen element, and the nitrogen element is derived from low-molecule-weight nitride and strong alkali cyclic nitride. The method is short in time for commencement, raw material switching and stable production state start, the consumption of a passivant in the commencement process and potential danger in the ammonia injection process can be avoided, and not only is energy consumption reduced, but also environment pollution and human body damage caused by the passivant can be reduced.