2786 results about "Plastic mulch" patented technology

An apparatus for producing algae circulates algae fluid through flexible reactor tubing that is at least partially translucent to sunlight. The reactor tubing lies flat when not pressurized. Preferably, the reactor tubing is made of clear polyethylene with UV inhibitors, the polyethylene being between 6 and 15 mil thick. The reactor tubing preferably has a substantially circular cross-section with a 6 inch diameter and is preferably 1250 feet long. Gas relief valves allow gases generated during algae production to escape from the reactor tubing. CO2 may be injected into the algae fluid to stimulate photosynthesis. A circulation pump propels the algae fluid through the reactor tubing, keeping the reactor tubing pressurized and stationary without touching the reactor tubing, so that a rigid support structure is not needed. One or more layers of plastic mulch may be disposed above or below the reactor tubing to control temperature and sunlight exposure.

The invention discloses a ful- degradable liquid mulch film, taking renewable and cheap natural macromolecule humic acid, lignin and waste slag as main raw material, containing no artificial macromolecule monomer in burdening. The product is characterized by good thermal insulating, and water retention function, low cost, environment- friendly, and adjustable degradating time about 30-120 days according to different requirement. The invention is characterized in that: it effectively overcomes problem of hard degradation for normal plastic mulch film, and it can fully degrade under natural environment, and the final product is soil humic acid fertilizer and carbon dioxide and there is no harm component residual.

The invention discloses a controlled degradation type full-biodegrade agricultural mulching film, belonging to the technical field of agricultural mulching films. The full-biodegrade agricultural mulching film comprises the following raw materials by weight percent: 0.5%-50% of a processing aid A, 0.1%-0.5% of a processing aid B, 2%-10% of a functional aid A, 0.3%-2% of a functional aid B, 0.1%-5% of a functional aid C and the balance of full-biodegrade polyester. The full-biodegrade agricultural mulching film is reasonable in design, and the stiffness of the mulching film is kept by compounding flexible full-biodegrade resin with rigid full-biodegradable resin; good physical performance of the mulching film is ensured by reasonably combining various aids with full-biodegrade polyester; in addition, the mulching film does not contain non-biodegradable resin, is good in comprehensive performance, can meet the requirements on the degradation time caused by crops, and cannot affect subsequent farm operation after being degraded.

The invention relates to an environmental-friendly mulching film which can endow universal plastics with properties of photothermal oxidative degradation and biodegradation. The invention specifically discloses a degradable material which is prepared from photothermal oxidative degradation granules, a thermal stabilizer, a photostabilizer, an antioxidant, a biodegradation guiding agent and the like; and after the degradable material is added to the universal plastics (such as polyethylene, polypropylene, polystyrene and the like), the plastics can be subjected to photothermal oxidative degradation and biodegradation. The environmental-friendly mulching film capable of being subjected to oxidative biodegradation can be produced through preparing a degradable master batch from the degradable material and low-density and low-melting-point polyethylene by a twin-screw granulator and adding the degradable master batch to mulching film production. The degradable environmental-friendly mulching film disclosed by the invention not only has the advantages of simplicity in preparation, low production cost, environmental friendliness and no pollution, but also has very good time controllability; and the degradation time of the mulching film can be changed through adjusting the content of ingredients of the mulching film, so that the requirements of different crops for growth are met, and the mulching film is very applicable to the needs of agricultural planting.

The invention discloses a method for preparing degradable agricultural mulches by reusing organic waste residues of biomass, which can be widely used for preparing biodegradable nutritional type water-retention mulches by recycling the by-product residues in the fermentation brewing industry and the sugar industry. In the process, low-concentration alkali liquor is mainly used for processing the waste residues, specified neutralizing agents are used for neutralizing the fertilizers such as N, P, K and the like required for growing the plants which are generated and auxiliary film-forming agents, plasticizers and the like are used for preparing mulch stock solution, or casting or diluting or spraying is carried out. The mulch is low in cost and convenient to operate, such substances as pesticides, weedicides, trace fertilizers and the like can be added to the mulch according to the requirements of different crops, and the mulch not only has the effects of heat preservation, moisture preservation and fertilizer betterment but also has moderate degradation period. The degradation rate of the ground mulch reaches 55-70% after 4 months and almost reaches 100% after about 8 months.

The invention relates to a mulch film, in particular to a polyester full-biodegradable mulch film. The polyester full-biodegradable mulch film is prepared from the following raw materials in percentage by mass: 40%-80% of flexible degradable polyester, 10%-55% of rigid degradable polyester, 0.5%-1.5% of a reactive compatibilizing agent, 1%-2% of a heat preservation agent, 1%-2% of a moisturizing agent, 0.5%-1.5% of an ageing-resistant agent, 0.5%-1% of a smooth agent and 0.5%-3% of an anti-block agent. The polyester full-biodegradable mulch film does not contain any non-biodegradable general plastic and starch; the film blowing operation can be performed on a general LDPE (low-density polyethylene) film blowing machine; equipment does not need to be modified; the polyester full-biodegradable mulch film is good in transparency, flexibility and heat preservation property, high in strength, low in water vapor penetration rate and favorable for preserving moisture.

The invention discloses a method for safely planting okra at a high yield and high quality, which belongs to the technical field of okra planting. Due to the adoption of the method for planting okra, the okra can be harvested 15-20 days ahead. EMs (Effective Microorganisms) are applied to the okra, so that the disease resistance of the okra is improved, the yield of the okra is increased, and the quality of the okra is improved. The average yield of fresh okra per 667m<2> is 4,550kg, which is increased by over 28 percent in comparison to the conventional okra cultivating method. The okra has good quality, tastes fine and smooth and meets the requirements of consumers, and the use of pesticides is reduced. A black plastic film and a one-time fertilizing method are applied, so that weeding and topdressing links are eliminated, and five to six workers are saved. The production cost is lowered, and the economic benefit of the okra is increased. A solid technical foundation is laid for the popularization of large-scale and standard production of the okra.

The invention relates to the field of the planting of vegetables, in particular to a purple sweet potato planting method suitable for the Northeast. The purple sweet potato planting method specifically comprises the steps of seed selection, seedling cultivation, land preparation, mulching cultivation, fertilization and field management. According to the invention, measures are adjusted to local conditions, a plurality of agricultural planting technologies are adopted to research the purple sweet potato planting method suitable for the Northeast, and the average yield per mu (15 hectares) can reach over 2,500kg after tests. In terms of that the average purple sweet potato price in the market is RMB6 / kg, even RMB18 / kg out of season, peasants can realize income growth by adopting the planting method provided by the invention.

The invention disclosed a non-mulching-film well pit type cured tobacco young seedling transplanting method which comprises the following steps of: (1) preparing land and ridging; (2) determining transplanting time; (3) forming transplanting well pits; (4) transplanting tobacco seedlings; (5) spraying root fixing water and carrying out top dressing; and (6) filling with soil and sealing. The method is a technological innovation of the mulching film cultivation of the cured tobacco, and has the advantages that: the problems of seedlings with high and slim stems as well as exposure of tobacco stems brought by non-standard conventional transplanting method, the problem that the drought climate at the transplanting time is unfavorable to transplanting, the problems in the improving the survival rate of planted tobacco seedlings and shortening the seedling restitution stage and the problem of slow transplanting progress are solved; the characteristics of relatively maintaining the heat and humidity of the well pits are utilized to realize young seedling transplanting and to finish cultivation and field deep-planting of high and strong seedlings in the well pits at one time; the seedling raising time is shortened, the seedling raising cost and facility investment are reduced, and the comprehensive utilization benefit of the seedling raising greenhouses is improved; and the disease infection opportunity during the leaf cutting link is reduced, the utilization rate of the fertilizer is improved, the root systems of the young seedling are flourishing and the drought defying capability is enhanced. The method is suitable for planting of cured tobacco, burley tobacco, sun-cured tobacco and other crops.

The invention relates to a degradable sludge-based mulching film and a preparation method of the degradable sludge-based mulching film. The mulching film comprises the main ingredient of sludge aggregate. The preparation method comprises the following steps of: preprocessing the sludge aggregate, and mixing the processed sludge aggregate with materials, such as binding agent, plasticizer and the like to react so as to prepare the agricultural degradable biomass mulching film. The mulching film has low cost and combines with the function of soil moisture conservation, temperature preservation and slow release fertilization, the degradation period meets the covering requirements of the whole growth period of common crops, and the degradable sludge-based mulching film is an agricultural product with a larger market potential.

The invention discloses a whole-growth period plastic mulching cultivation technical mode with double-row concave ridges in a flue cured tobacco field. The tobacco field is plowed and divided to form the double-row concave ridges with a width of 220cm and a height of 15-35cm; a row distance which is 100cm is arranged between the two rows of the concave ridge peaks, and a concave ridge groove is arranged between two rows of the ridge peaks; the peak of the double-row concave ridge is 120cm away from the peak of another double-row concave ridge; the double-row concave ridges are covered by an agricultural plastic mulch with a width of 200cm; tobacco seedling holes are dug on the peaks of the concave ridges at a plant distance of 55-60cm in each row; the depth of the concave ridge groove is 8-12cm, and pervious holes with a diameter of 1cm are dug on the agricultural plastic mulch on the valley of the groove at a vertical distance of 60cm; a basic fertilizer is applied before mulching, and an additional fertilizer is applied 20 days after transplanting. The technical mode can help realize effective water collection, water conservation, fertilizer conservation, temperature adjustment, soil moisture preservation and weed suppression, reduce fertilizer input, save labor, effectively increase the yield and quality of tobacco leaves, and increase economic benefit of tobacco growers.

An in-situ biologic repairing method for the soil polluted by petroleum features that after the fungus-bacteria mixed liquid, soil improver, organic fertilizer and inorganic nutrients are applied to the polluted soil, the soil is irrigated, ploughed, and covered by plastic film.

A method for improving an afforestation survival rate by water collecting, water retention and water replenishing comprises the steps of water collecting, soil preparation, water retention and water replenishing. The water collecting method comprises the steps that a soil preparation engineering mode is used for collecting natural rainfall water into forest land and plant pits; the measure of building a flow collecting face, a flow collecting pool, a water cellar and the like is used, in the adequate rainfall reason, the natural rainfall water is collected and reserved, and the natural rainfall water is used for supplemental irrigation when trees are in short of water. The water retention method comprises the step of using mulching films, wheat straw, dinas and the like for covering the plant pits. The water replenishing method comprises the steps that when it is arid and does not rain and when nursery stock is in water shortage, the methods of micro-irrigation, trickle irrigation, infiltrating irrigation under films, root-irrigation through tube inserting, water injection irrigation and the like are used for water replenishing; soil preparation is conducted, fertilizer is applied to the plant pits, plastic films are mulched for catchment and soil conservation, seeding and planting are conducted, a water collecting face and a water reserving cellar are built to collect rainfall water, and water replenishing and irrigation are conducted in the drought period in spring. The final purpose is to improve the afforestation survival rate and the preserving rate, and to improve the volume of forest tree growth. In addition, the important links further comprise suitable tree species choosing, application of the new technology, new method and new materials of afforestation, cultivation management, disease and pest control and the like.

The invention discloses a drip irrigation dry-farming planting method under a rice direct seeding film, which belongs to a crop planting agriculture method. A timely seeding operation is carried out after the preparation before seeding is finished; the seeding operation is as follows: the operations of drip irrigation zone paving, film covering, punching, hole seeding and soil covering on a hole are accomplished by one time by a drip irrigation tube-paving film-paving fine seeder under the film; the drip irrigation zone is arranged on the lower surface of a plastic film and is connected with a water-carriage system; and timely and proper water dripping and fertilizing are carried out according to the growing demand of the crops. The drip irrigation dry farming planting method can be applied to save water by 60 to 70 percent, save the fertilizers by 30 percent, have high degree of mechanization, save labor, reduce the field management and reduce the pesticide pollution.

The invention discloses a technique and method for off-season cultivating of organic bamboo shoots, and concretely relates to a cultivation technique and method for cultivating the organic bamboo shoots in advance by a season, and therefore, the bamboo shoots which are eaten in March or April can be eaten on New Year's Day and during Spring Festival in advance to meet the living needs of people and increase the planting benefit of the bamboo shoots. In the cultivation technique, pesticide, chemical fertilizer, growth regulators, hormone, herbicides and the like are not used. Bamboo shoots organic base certification, variety selection, site selection, plantation and forestation, cultivation in advance, self-made decomposed manure, organic matter plastic film mulching and scientific fertilization are adopted; minerals and botanical insecticide are used for controlling diseases and insect pests; natural enemies of pests, the inherent phototaxis and the flavor-directed performance of the pests are used for capturing and killing the pests, the purposes of eliminating the pests and protecting beneficial insects are achieved, conditions, such as light, heat, air and the like, are fully utilized, an environment which is beneficial to the growth of the organic bamboo shoots and bamboo shoots is created, the purposes of advance yield and high yield are achieved, the organic bamboo shoots are produced efficiently, and economic income is increased.

The invention discloses a method and system for controlling salt of saline-alkali soil. The method comprises partitioning an area to be planted to a crop root system dense layer, a spacer layer for controlling salt, and a subsoil layer; filling the spacer layer for controlling salt, forming the area to be planted, and irrigating the formed area to be planted; fertilizing a base fertilizer, and laying a plastic ground film on the ground before sowing corps; and holing the ground film and sowing the crops. The method provided by the invention can improve emergency rate and yield of the crops.

The invention relates to a vegetable planting method. The method comprises a seed treating step, a seedbed seedling raising step, a fertilizer applying and uniform plowing step, a ridging and ditch feeding step, a bare root planting step, a black plastic film covering step and a field management step, wherein the seed treating step comprises the following specific steps of: irradiating seeds with ultraviolet rays for 10 to 45 minutes to sterilize the seeds; soaking the sterilized seeds in solution of potassium permanganate in a ratio of potassium permanganate to water of 1:500 for 10 minutes; cleaning the soaked seeds with water; and soaking the cleaned seeds in 10 percent solution of trisodium phosphate for 5 to 10 minutes for disinfecting; and mixing the soaked seeds by using lactobacillus. No chemical fertilizer or pesticide is used in a planting process, so that the produced vegetables are not polluted. Actinomycetes and the lactobacillus are used in the seedbed seedling raising step, the fertilizer applying and uniform plowing step and the field management step, so that vegetable root rotting can be prevented and the infestation of plant diseases and insect pests to root systems is reduced.

The invention discloses a completely-biodegradable mulching film material which contains one kind or several kinds of compounds which are selected from a group consisting of polyhydroxy alkanoates, polylactic acid, poly(butylene adipate-co-terephthalate), poly(butylene-scuccinate / adipate) and poly(butylene-scuccinate). By adopting the completely biodegradable mulching film material, the yield of crops can be greatly improved, the mulching film material can be completely biodegradable without residues of a mulching film, and the yield of crops can be continuously increased.

The invention provides a high-yield cultivation method for sugarcanes. The high-yield cultivation method includes directly applying raw materials of green manure into newly excavated sugarcane furrows; allowing the raw materials of the green manure to ferment under film covering closed conditions for 15-25 days; lifting each mulching film to a side of the corresponding sugarcane furrow after the raw materials ferment and become thoroughly decomposed; adding compound fertilizers into the sugarcane furrows; covering soil on the compound fertilizers; planting sugarcane seedlings. The raw materials of the green manure comprise, by weight, 300-500 parts of broken sugarcane leaves, 300-500 parts of silt from fish ponds, 200-300 parts of farmyard manure, 200-300 parts of bran hulls, 100-200 parts of sweet potato residues, 50-100 parts of yeasts and 20-50 parts of lactic acid bacteria. Sugarcane buds are soaked in mixed solution for 18-24h to obtain the sugarcane seedlings, and the mixed solution comprises 6-24 parts of quicklime, 1-1.5 parts of gibberellin missible oil and 800-1200 parts of water. The high-yield cultivation method for the sugarcanes has the advantages of high bud ratio, low fertilizer and pesticide consumption in planting procedures and capabilities of obviously increasing the yield of the sugarcanes and obviously improving the quality of the sugarcanes.

The invention relates to the greenhouse crop planting field, in particular to compound microbes for reducing and disinfecting greenhouse soil and a soil disinfection method, and solves the problem of multiple defects in the prior art. The compound microbes comprise bacteria, actinomycetes, saccharomycetes and moulds. The soil disinfection method includes the steps of selecting June to September as a disinfection period to apply crop straws, organic fertilizer and the compound microbes on the soil after the crops are harvested; deeply plowing soil layers to form small ridges; covering ridge surfaces with plastic film, filling enough water under the film till the soil humidity achieves 100%, and sealing the mulching film and covering the greenhouse plastic film for 20 to 25 days; and uncovering the greenhouse plastic film and removing the mulching film for planting. According to the compound microbes for reducing and disinfecting greenhouse soil and the soil disinfection method, the method is non-toxic, harmless, pollution-free and residue-free, pathogenic bacteria, ova and the like in soil plough layers are killed, soil organics are increased, the soil physical and chemical structure is improved, soil fertility is improved, and good foundation is laid for improving product qualities.

The invention belongs to the planting technology of crops and relates to a method for treating the soil of a continuous cropping field of greenhouse strawberry. The method includes the following steps: a. plants are pulled out as soon as the harvest of the greenhouse strawberry is finished during May to July every year and ground surface covering materials like black plastic film, etc. are removed; b. green bran, the glume of which is removed, is scattered, the amount is 500-750 kg per mu, and the rice bran is evenly mixed into the soil by adopting mechanical and manual method for intertillage weeding; c. surrounding ditches around the greenhouse and the interior of the greenhouse are fully irrigated with water, and the soil in the greenhouse becomes saturated by absorbing water; d. the field surface in the greenhouse is covered with undamaged plastic film, the soil around the plastic film is firmly pressed to prevent air from entering until August to September when strawberry is to be planted. The method can eliminate the obstacle of continuous cropping of strawberry, causes no pollution to the environment, and provides better organic fertilizer for the growth of strawberry, thus having good comprehensive economic benefit.

The invention discloses a method for improving soil fertility of a greenhouse and preventing a soil disease. The method comprises a biogas slurry storage step, a soil anaerobic fermentation raw material sowing step, a step of conducting soil tillage on evenly-scattered anaerobic fermentation raw materials, a step of conducting flood irrigation on a cultivated filed through the biogas slurry and water, a step of covering a mulching film for sealing, a step of depressing the greenhouse, and a step of uncovering the mulching film to again conduct soil tillage. The method has no chemical composition residuals, can not damage strain balance of various beneficial bacteria in the soil, does not enable the beneficial bacteria to produce drug resistance, is stable in disinfection effect, can play a role of disinfecting on a deeper soil layer, is low in disinfection cost, can be used in a certain area in large-quantity and high-strength modes, solves the problem that biogas slurry consumption in a biogas project is difficult, improves soil physical and chemical properties and acid-base equilibrium, improves disease-insect resistance of the crop and stress resistance of a bad condition, can kill harmful bacteria, reduces the disease, improves absorption efficiency of the crop on various fertilizer components, improves fertilizer efficiency of the fertilizer and saves fertilizing cost.

The invention provides a saline-alkali soil brackish water film mulching drip irrigation processing tomato planting method, which comprises the following steps: (1) planting processed tomatoes: planting the processed tomatoes by adopting a manner of wide rows and high ridges, and mulching a white film above plants; (2) laying out a drip irrigation system, wherein an interval b between the drip irrigation systems is 48 to 52 cm; an interval a between drip emitters is 0.25 to 0.35 m; (3) carrying out high-frequency and small fixed amount water irrigation in a growing period of the processed tomatoes: alternatively irrigating brackish water and fresh water, and adopting the fresh water for irrigation in a seedling stage, and no irrigation in a red-mature period. The invention puts forward a cultivation method taking the brackish water and saline-alkali soil as targets in combination with the realities of shortage of fresh water resources, abundant underground brackish water resources and serious soil salinization in an arid region and a semi-arid region, and not only moisture is enabled to be held up within a field microcirculation of soil-and-film, deep seepage losses of the moisture are greatly reduced, but also under-film soil evaporation is remarkably lowered, sources of soil secondary salinization are cut off and the surface accumulation of salt is eliminated.

The invention provides a dry farming anti-aging long-acting autumn mulching film which meets the requirements that rain is collected and soil moisture is preserved, and autumn rain is used in spring in agricultural production of arid and semi-arid regions. Specifically, the dry farming anti-aging long-acting autumn mulching film is prepared from the following raw materials in percentage by weight: 0.3 to 0.5 percent of polymerization hindered amine light stabilizer, 0.08 to 0.16 percent of complex antioxidant, 73.6 to 81 percent of linear low-density polyethylene, 0.06 to 0.12 percent of ultraviolet absorber, 8 to 15 percent of low-density polyethylene, 5 to 10 percent of metallocene linear polyethylene, and 5 to 10 percent of high-density polyethylene, and the total percentage of all thecomponents is 100 percent. The produced dry farming anti-aging long-acting autumn mulching film effectively meets the requirements that rain is collected and soil moisture is preserved, and the anti-aging time of mulching film coverage during production of crops can reach 300 to 540 days.

The invention discloses a method for planting Chinese tamarisk forest in littoral heavy saline-alkali land through direct cuttage. The method comprises the following steps of: A, carrying out land preparation, building bench borders; B, irrigating with saline water in winter and freezing; C, mulching film; D, preparing cutting wood; E, carrying out cuttage and planting; F, fertilizing; and G, carrying out growth period management. In the invention, through taking a series of measures such as land preparation, freezing and irrigating with the saline water in winter, melting and showering with the saline water in spring, film mulching for reducing soil and retaining water and the like, Chinese tamarisk forest can be planted in the littoral saline-alkali land by a direct cuttage method, goodeffect is realized in the same year when afforestation is carried out in high saline-alkali land, vegetation coverage rate of the high saline-alkali land is improved, ecological environment is improved, and the method disclosed by the invention has a wide application prospect.

The invention relates to a crop planting technology, in particular to the planting technology for planting big rear crops in semiarid rain-fed agricultural region with high altitude but small annual rainfall. The technology of the invention is that: ditching and ploughing ridge in the leveled field, sowing seeds in side the ridge ditch after covering the ridge ditch and a ridgr platform with a mulching film. The invention, for forming the ridge platform covered by the mulching film outside the sewing ditch, can function as a water collecting surface to fully collect the rainwater and enable it flow into the ditch, thus can effectively collect rainwater and protection moisture in the soil, namely can largely reduce water loss and soil erosion as well as vaporization of moisture and sufficiently utilize the limit rainwater resource at the same time.

The invention relates to a drip irrigation under a film of a fruit tree and root field microenvironment regulation and controlling integrated method. The method comrpsies: firstly opening a regulation and control delve on the anterior limb projected on the fruit tree canopy ground, laying a seeding raising film on the lateral surface and the bottom part of the regulation and controlling delve, and placing filling materials on the seeding raising film; then disposing a drip irrigation pipe along the fruit tree row according to duplex tubes or three tubes; and laying the ground film along both sides of the tree row, covering the drip irrigation pipe and the regulation and controlling delve, and compacting with soil. Through the invention, the water and fertilizer integration drip irrigated under the film, watering and manuring automation as well as the water and fertilizer slow release and growth control and flower promotion regulated and controlled at the root field microenvironment are combined together, the root system range of the fruit tree is controlled at a certain volume, the nutrient is released in the delve through regulating and controlling the soil moisture percentage, ground temperature, fertilizer and the like of the root field, the growing development of hair root is promoted, vegetative growth and reproductive growth process above the ground part is regulated, and the hair root is regulated and controlled within the range of the delve to reach the function of coronal controlling and flower promotion. The method is simple, practical, economic and reasonable, and is a fruit tree root field microenvironment regulation and controlling integrated method with ecological environment protection and water and fertilizer conservation.

The invention provides a bacterial strain JF which is separated out from a large number of soils with mulching films used and can efficiently degrade phthalate, and belongs to the technical field of biology. The bacterial strain grows fast, can produce spore, is high in resistance to external environment, and reaches more than 90% of degradation rate regarding to phthalate within a broad range that the temperature is 30 to 45 DEG C and the pH (Potential of Hydrogen) is 5.0 to 8.0. The identification result shows that the bacterial strain is bacillus subtilis (Bacillus Subtilis), and the accession number is KF364634; and the bacterial strain is stored in China General Microbiological Culture Collection Center (CGMCC) located at No.3, Courtyard 1, West Beichen Road, Chaoyang District, Beijing, on July 22, 2013, with the storage number of CGMCC No.7950. The bacterial strain can be applied to bioremediation or biological purification of soil and sewage polluted by phthalate, and protects the ecological environment, and thus the safety of agricultural products is ensured.

The invention mainly relates to a covering cultivation method for mulching films, in particular to a covering cultivation method for biodegradable mulching films in a semi-arid region. The covering cultivation method is mainly characterized by comprising the following steps of 1, designing in fields, 2, tidying land, ridging and flattening the ground 3, fertilizing, 4, covering the biodegradable mulching films, 5, sowing, 6, managing in the fields, 7, harvesting, and 8, ploughing and burying mulching film residues into soil at the depth of 20-30cm instead of collecting the mulching film residues after the crops are harvested. The land tidying and ridging are carried out 7 days before crops are sowed, the covering tension of the biodegradable mulching films is 1 / 6 to 1 / 8 of the tension of ordinary mulching films, the biodegradable mulching films are 3-5mm away from the ground, and the biodegradable mulching films are covered 7 days before sowing. The covering cultivation method has the advantages that due to the fact that the biodegradable mulching films have high air tightness, the covered mulching films can reduce soil moisture evaporation and increase land temperature, can increase soil moisture, accelerates crop growth and development, and improves crop yield. Compared with traditional cultivation (covering-free convection planting), a maturation stage of crops covered by the biodegradable mulching films can be brought 7-10 days forwards, and the crop yield and the moisture utilization rate can be respectively improved by 1-58% and 14-45%.