2782 results about "Soil preparation" patented technology

The invention relates to a planting method of oilcamellia rich in selenium. The method comprises woodland selection, scientific soil preparation, density rationalization, scientific planting, intensive cultivation, selenium fertile application, scientific fertilization, pest and disease damage prevention and cure, and fruit harvest. According to the method, the oilcamellia rich in the selenium can be planted in selenium-deficient soils, and can be popularized and applied widely.

The invention discloses a method for cultivating pollution-free cucumbers. The method comprises steps of soil selection, soil preparation, seed selection, cultivation, transplantation, fix planting, management after the fix planting, prevention and cure of diseases and insect pests, fertilization and fruit harvest. Standards and requirements of pollution-free crop planting are implemented strictly in accordance with environment quality requirements, cultivation technical measures, fertilization principles and methods and methods and principles of prevention and cure of diseases and insect pests, a Chinese herbal medicine fertilizer is applied in the seedbed sterilization and the prevention and the cure of diseases and insect pests, the usage amount of conventional pesticides is reduced, the pesticide residue is also reduced, and pollution-free requirements are met. By the aid of the method, harvested cucumbers are uniform in size and smooth in cucumber peel, the yield is high, the quality is good and no pesticide residue exists.

The invention discloses a greenhouse cultivation method for promoting high quality and high yield of the dragon fruit. The method includes steps of construction of greenhouse heat-preserving facility, soil preparation and bed making, frame erecting and modeling, planting, water and fertilizer management, shaping and trimming, artificial pollination, blossom and fruit thinning, pest control and the like. In addition, the invention further discloses a greenhouse structure and a dragon fruit frame building structure. The greenhouse cultivation method and the greenhouse structure for promoting high quality and high yield of the dragon fruit solves problems of high cost, low yield, poor quality and the like in conventional greenhouse cultivation technologies of the dragon fruit, cultivation of the dragon fruit is simplified, production cost is lowered, and the dragon fruit yielded is high in yield, is truly green and healthful fruit and has nutrient value obviously higher than that of the dragon fruit cultivated by conventional methods.

The invention discloses a mechanically-mulching cultivation method of organic rice, relating to a rice cultivation method. The purpose of the method provided by the invention is to solve the weeding problem in paddy fields in the existing cultivation method of organic rice. The method comprises the steps of 1, selecting field environment, namely (1) selecting soil, (2) selecting air quality and (3) selecting a water source; 2, performing soil preparation in the field, namely (1) ploughing, (2) fertilizing and (3) digging canals and harrowing; 3, preparing seedbed and bed soil, namely (1) preparing seeding environment, (2) preparing seedbed and (3) preparing bed soil; 4, germination treatment of seeds, namely (1) drying seeds, (2) performing plasma treatment, (3) soaking seeds and (4) accelerating germination; 5, sowing; 6, managing seedlings, namely (1) performing insect prevention treatment, (2) managing temperature, (3) managing water, and (4) fertilizing; 7, mulching, transplantingseedlings and managing the field, namely (1) making a bed and mulching, (2) transplanting, (3) irrigating, (4) dressing foliar fertilizer, (5) managing water layers in the field, (6) weeding and (7) preventing insects. The method is mainly used for cultivating organic rice by mechanical mulching.

The invention discloses a direct sowing culture method of rice. The direct sowing culture method comprises the steps: (1) selection of variety; (2) land preparation; (3) treatment of seed; (4) sowing; (5) management of emergence period; and (6) harvesting in time. The direct sowing culture method of the rice provided by the invention has the following advantages: (1) the working procedures are simple and convenient; human power is saved; and the effect is high; manpower can be saved by 45-70 persons per hour and square meter; the cost is saved by about 450 yuan per hour and square meter; and the labor productivity is raised by about 30%; (2) rice seedling raising and transplanting procedures can be reduced, thus mechanical sowing is convenient; (3) rice seedling bed is unnecessary, so that the planting area of grains and commercial crops can be expanded; and the cropping index can be improved; (4) root damage due to seedling pull-up and green turning process after transplanting can be avoided; the rice is tillered earlier, and the growth and development are faster; and (5) the cultivation characteristics of the direct sowing rice include developed root system, healthy and strong plant, strong disease resistance and large number of productive ear. The method is suitable for planting rice for villages.

The invention discloses a seed selection method for the improved variety of a walnut and a high-yield cultivation method thereof, comprising the steps of: selecting 8 walnut local improved varieties which are suitable for cultivating at different areas, namely, protecting the first-the eighth walnuts; adopting ten measures, namely, selecting a good area (siting control technology), building a large pond (preliminary soil preparation technology), fertilizing a picul of stable manure (base fertilizer fertilizing technology and soil improving technology), planting a improved variety strong seedlings (improved variety strong seedlings technology), irrigating a picul of root-fixing water (root-fixing water technology), covering a mulching film (water-retaining technology), a set of scientific fertilizer management method (fertilizing technology), a set of cultivation fostering management technology (soil management technology), a set of normative shaping trimming technology (tree body management technology), and a set of systemic pest preventive measure (soil management technology); and promoting the yield of young tress, updating old trees and improving low-yield tress.

The invention discloses a corn planting and cultivating method. The corn planting and cultivating method includes the following steps of selecting a corn variety and conducting soil preparation before planting, arranging wide rows and narrow rows at intervals, sowing corn, completing sowing, pipe paving, film paving and soil covering through an air suction type precision seeder, and conducting field management in the seedling stage, the ear stage and the flower stage, wherein the width of each wide row ranges from 85cm to 95cm, the width of each narrow row ranges from 25cm to 35cm, a drip irrigation zone is paved in the middle of each narrow row. According to the corn planting and cultivating method, due to the fact that the method that the wide rows and the narrow rows are arranged at intervals is adopted, the number of drip lines which are used can be lowered. Modifiers are sprayed in the early period of the field management in the seedling stage to control the plant height and the ear position, and the defect that through a conventional planting method, the corn easily falls over due to the fact that the plant height is large and the ear position is high is overcome. Pesticide is sprayed through a self-propelled high-stalk crop boom sprayer in the middle and later period of management to control pests, the influences of natural disasters on corn growth are reduced, and the influences on productivity caused by a large number of European corn borers, cotton bollworms, aphids, leafhoppers and red spiders appearing after corn jointing are eliminated.

The invention discloses a pepper planting method. The pepper planting method includes the following steps of seed selection and pretreatment, seedling growing, soil preparation, fixed planting, field management, harvesting and the like. According to the pepper planting technology, the acre yield of peppers can reach 2000-3000 kilograms. Compared with a traditional planting technology, the yield can be improved by 30-50 percent, meanwhile, the planted peppers are good in quality, green, friendly to the environment, low in planting cost, convenient to manage and suitable for large-scale popularization and has obvious social benefits, economic benefits and ecological benefits.

The invention discloses a method for planting organic passion fruit trees. The method includes the steps of variety selection, site selection, soil preparation, soil pH adjustment, establishment of a passion fruit tree foundation, field planting, reshaping and pruning, field management, blossoming, fruit yielding and the like. According to the method, organic fertilizer and a low-toxicity prevention method are adopted in fertilization and pest control, so that the pulp of produced passion fruits is full of yellow fruit juice, the content of sugar is high, the color is bright, the yield reaches up to 2 tons per mu each year, pollution is avoided, and five seasons of fruits can be harvested each year. The successful planting of the organic passion fruit trees provides a theoretical and practical basis for creating incomes of local farmers. According to the method, a leeward apricus flat ground is selected, and the place where a good source of water is obtained, the soil layer is thick, fertility of the soil is above the average and transportation is convenient is used as a planting foundation, so that it is guaranteed that the passion fruit trees can grow in a good environment, the roots of nursery-grown plants are planted in furrows and exposed to the sun, hence, the roots can better absorb sunshine, and fertilization and weeding are further facilitated.

The invention discloses a method for pollution-free cultivation of pumpkins in a greenhouse, belonging to the technical field of plant cultivation. The method comprises the following steps of: A, seed treatment: a, seed selection; and b, seed soaking to accelerate germination; B, preparation and disinfection of nutritive soil; C, culture of seedlings; D, sowing; E, seedbed temperature management; F, seedbed moisture management; G, soil preparation and spreading of base fertilizer; H, determination of the planting time and method; I, field management: a, temperature and humidity management; b, scaffolding; c, plant adjustment; d, topdressing; e, pollination; J, pest and disease control; and I harvesting. The method for pollution-free cultivation of pumpkins in the greenhouse is scientific and reasonable, the management is perfect, the fertilization is scientific, diseases of fruits can be reduced, the temperature conditions can be well controlled, the survival rate is high, the yield of fruits is high, the quality of the produced fruits is high, and demands of people for pumpkins grown in the greenhouse can be satisfied.

The invention discloses a separated slope trench-shaped terrace soil preparation method applied to mountainous regions. A segment of mountain slopes in an original state is reserved between adjacent fields with the width of 2m and soil preparation depth of 1-1.2m, grooves with the width of 1.5m and the depth of 1m are excavated on slope surfaces, and then slope surface soil or local soil is mixed to rotten ripe high quality organic fertilizers with the thickness of 10cm for backfill. A mountain slope original state slope surface with the width of 2m is reserved between two grooves to serve as a ridge. A built field surface is a terrace in a counter-slope state, and the other side of the terrace is high and the inner side of the terrace is low. Another ridge with the height of 30cm is built on the outer edge of the terrace to block and store water and field surface runoff. The whole field surface faces to a direction along a contour line and mains a gradient of 3%.-5% longitudinally. Through using of the method, surface soil and weathered materials on mountainous region surfaces can be centralized and used, the problems of local soil an natural water storage are solved, and thus needs of planting of trees on the mountainous regions are met.

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 scientific and reasonable method for planting kiwi fruits. The method comprises the steps of field selection and soil preparation, seedling selection, field planting, fertilizer applying, trimming, support erecting, plant disease and insect pest prevention and treatment, picking and the like, wherein the field selection and soil preparation comprise the field selection and the soil preparation, the field selection means the selection of subacidity soil where the transportation is convenient, the underground water level is below 1 meter, the irrigation and drainage conditions are good, and the PH value is 5.5-6.5, and the area where the organic matter is rich, the soil is fertile and loose, and the depth of a soil layer reaches more than 100cm. The soil preparation means that soil deep tillage is carried out, the depth of the soil is not less than 80cm, the soil deep tillage is carried out, meanwhile, the base fertilizer is applied, the bio-organic fertilizer applied in each mu is not less than 800kg, meanwhile, in the soil preparation, hole digging (including furrows) is carried out according to the 4m width, and the depth of the furrow is not less than 80cm. The method is adopted to conduct the field selection and the soil preparation, the kiwi fruits are not limited by the planting area, and the transportation cost is reduced. Meanwhile, the yield of the kiwi fruits can be greatly improved by the adoption of the planting method.

The invention discloses a high-yield Shanhua-15 peanut precise-cultivation method. The method comprises the following steps such as field selection, soil preparation, fertilization, seed treatment and sowing and specifically comprises, on the basis of sufficient soil preparation and base fertilizer application, ditching three fertilizing furrows on every ridges during ridging, which include one in the middle and the other two on both sides, and the depth of the furrows is 10-15 cm; applying biological organic insect-prevention fertilizer inside the furrows, performing full irrigation and then soil covering on the furrows, and sowing 2 seeds for each hole between every two fertilizing furrows with a spacing of 15-17 cm; performing film mulching after the sowing. The high-yield Shanhua-15 peanut precise-cultivation method has the advantages of improving the ground temperature inside the sowing ridges, enhancing the fertility of soil and increasing the organic matter content in the soil.

The invention provides a manufacturing process and an application method of a ginseng bio-organic fertilizer. By the manufacturing process and the application method, since ginsengs grow continuously in the same place for years, with the extension of the growing years, the problems of serious diseases, yield reduction and quality reduction of ginsengs are caused, the soil conditions deteriorate gradually and the fertility is reduced. The ginseng bio-organic fertilizer is prepared from the following raw materials in percentage by weight: 0.2-0.5% of a composite microbial agent, 0.2-1.0% of composite amino acid, 60.0-80.0% of organic material main ingredient and 10.0-30.0% of organic material auxiliary materials through composting together. The bio-organic fertilizer is spread on the surface of soil uniformly during soil preparation, the dosage is 2-10kg.m<-2>; through turning and rotary tillage, the fertilizer is mixed uniformly with 20cm deep bed soil, and the ginsengs are planted after seven days. By the manufacturing process and application, the problems of gradually deteriorating soil conditions and reducing fertility during the ginseng growing process are solved, the purpose of fertilizing soil, reducing diseases of ginsengs and improving yield and quality is achieved, and meanwhile, the soil ecological environment is protected.

The invention discloses a high-mountain konjak cultivation technique, which comprises the steps of land selection, soil preparation, breeding konjak selection and treatment, due-time planting, field management, diseases and pests prevention and control, harvest and the like. According to the invention, by soaking seeds with a Chinese herbal medicine solution, weeding with a Chinese herbal medicine herbicide, and spraying a Chinese herbal medicine disease and pest preventing agent for prevention, diseases and pests of the konjak can be greatly reduced, the growth environment of the konjak is purified, the use of chemical pesticide is reduced, and the ecological environment is protected. The konjak produced by the cultivation technique is good in product appearance, safe and nuisance-free. The cultivation method is simple, has the advantages of low cost, high yield and the like, and is convenient to manage and suitable for large-scale cultivation.

A northern blueberry-growing method includes the following technical processes: variety selection, seedling propagation, collection and sand storage of cuttings, cuttage, field planting density, soil preparation, plantation, underground management, disease and pest control, pruning, overwinter protection and cold-proof material removal. The northern blueberry-growing method sufficiently utilizes local natural resources, can greatly reduce the production cost and increase the economic benefit, and can be easily accepted by growers.

The invention discloses a complete wheat straw returning mechanical rice seedling planting method, which comprises the following steps of: reserving stubbles of 10 to 30 centimeters when the wheat is harvested, cutting straws to the length of 5 to 8 centimeters, and uniformly scattering the cut straws on the surface of a field; applying a base fertilizer, irrigating water for 5 to 6 centimeters to soak the field for 2 to 3 days, and embedding grass and preparing the field for two times of transverse and vertical operations through a medium tractor and a grass embedding rotary cultivator, wherein the embedded depth of the wheat straws returned to the field is 5 to 10 centimeters; settling for 2 to 3 days after grass embedding and rotary tillage operations, and then mechanically planting seedlings, wherein the mechanical seedling planting water depth is 1 to 1.5 centimeters, and the seedling planting depth is within 1.5 centimeters; and after mechanical seedling planting, performing corresponding water, fertilizer and disease, insect and weed management at the early stage, the middle stage and the later stage respectively till the rice is mature. The straws are totally left in the rice field after the wheat is harvested, and the straws are totally changed into available fertilizer by natural decomposition, so the method avoids straw burning, purifies the air, protects the environment, improves the physical and chemical properties and aggregate structure of the soil and improves the organic substance content of the soil.

The invention discloses a method for planting potatoes in dry land in an all-film mulching ridging micro-furrow mode. The method includes the following steps of (1) land selection, (2) soil preparation, (3) fertilizer application, (4) ridging, (5) mulching, (6) seed preparation, (7) sowing, (8) field management, (9) disease insect and weed damage prevention, (10) harvesting and (11) waste film removing. The method has the advantages that (1) the number of rain collecting faces is increased, and the rainfall infiltration rate is increased; (2) soil moisture content on ridges and soil temperature are remarkably increased, and nutritional growth of the potatoes is promoted; (3) the soil moisture content on the ridges in rainy seasons is reduced, high-temperature high-humidity stress is relieved, and disease risks are reduced; (4) the potatoes are planted on the tops of the ridges, soil is loose, and tuber development is promoted; (5) mechanical topdressing is facilitated, and fertilizer can be directly applied to the micro ridges; (6) black mulching film is adopted to cover the whole land, and weed in the field is removed; (7) the rainfall utilization efficiency is remarkably improved, and the potato tuber yield is remarkably increased. The method has wide application prospects for potato planting in dry northwest areas.

The invention belongs to the technical field of plant cultivation and relates to a straight bar type individual plant cultivation method for a lagerstroemia plant of lythraceae. The method comprises the following steps: 1, adopting a cutting propagation seedling culture method to culture seedlings; 2, mounting a stem cultivating and modeling formwork; 3, conducting fertilization and soil preparation; 4, planting nursery stocks; 5, cultivating stems; 6, managing and protecting the nursery stocks; 7, conducting seedling root diminution. According to the straight bar type individual plant cultivation method for the lagerstroemia plant of the lythraceae, lagerstroemia indica seedlings are cultured to individual plant nursery stocks to achieve cultivation of 2-5m and even higher straight bar type individual plant nursery stocks, a basic material is provided for cultivating large single-stem lagerstroemia indica wood and culture of different combination modeling by implementing multi-stem inarching culture, multi-stem inarching heating growth can be fast achieved to form a large tree, combined modeling of multiple forms can be conducted, commercial value and the enjoy effect of the nursery stocks are remarkably improved.

An efficient high-yield cultivation method of the muskmelon in a spring-heated greenhouse is characterized by including variety selection, seed treatment, nutrient soil preparation, sowing, seedling management, transplanting and field planting, and field management. Through the application of the method, the problem that the muskmelon cultivated with the existing traditional cultivation mode of the muskmelon in the open field comes into the market late, suffers severe disease and pest damage and is low in yield and benefit is solved, the muskmelon comes into the market more than one month early, the economic benefit is increased, and the method is applicable to melon farmers planting the muskmelon in greenhouses in the Jiaodong area.

The invention discloses a cultivation method for seedless roxburgh roses. The cultivation method for the seedless roxburgh roses comprises the following steps: selecting a piece of land which is provided with good organic matter, a convenient water source condition and is not waterlogged due to low-lying condition; ditching according to a 1.2 m ridge surface, enabling a ridge depth to be 32cm, crushing soil finely, applying well-rotted farmyard manure 1500kg or compound fertilizer 120 kg to per mu (mu is a unit of area, and one mu equals to about 666.67 square meters), finishing seedbed soil preparation, and irrigating the seedbed land until the seedbed land is permeated with water at a time the day before cutting; utilizing healthy branches pruned in winter as cuttings or establishing a female parent garden for supplying cuttings, planting the seedless roxburgh roses of a year, enabling the base of every roxburgh rose to germinate 4-5 branches and the roxburgh roses to grow vigorously so that large numbers of the branches can be used for cuttings for cutting, cutting the cuttings and keeping two germs on every cutting sections after panicle removal of the cuttings to make sure that at least one germ survives in case the other germ is damaged after cutting, preparing 50 PPM (parts per million) solution of APD (aphidicolin) rooting powder for dipping the roots of the cutting sections before cutting, dipping the cutting bases in the solution for 5 minutes and laying for 4-8 h after the dipping, and then performing cutting; cutting; managing; and moving out of the garden and transplanting. According to the cultivation method for the seedless roxburgh roses, the survival rate of transplanting is high, the quality is good and the yield per mu is high.

The invention discloses an artificial large-cave soil preparation tea-oil tree forest planting and cave expansion associated method in a mountainous area, and relates to the technical field of tea-oil tree planting, for overcoming the defects of an conventional large-cave soil preparation tea-oil tree forest planting method that the tea-oil trees grow worse and worse and the cultivation cost is higher and higher because in the mountainous area. The method comprises steps of selecting a forest land, designing, excavating artificial large caves, widening strips twice, planting, and cultivating and managing. Due to adoption of the cave expansion associated method, great convenience is brought to the cultivation management, the growth of tea-oil plants can be promoted, the output of fresh fruits is increased, and the cultivation, harvesting and management cost is lowered.

The invention discloses a method for planting selenium-enriched organic Wuliqing teas. The method comprises the following steps of (1) preparing soil in a tea garden; (2) after the autumn teas are harvested, digging fertilizer applying channels between tea tree planting rows, wherein the channels are 50-80cm in deep; applying organic fertilizers and selenium-enriched fertilizers, applying one layer of fertilizer and then applying one layer of soil, wherein each layer of soil is 10-20cm in thick; turning up undersoil and burying surface soil; (3) installing insect trapping and killing lamps in the tea garden, gluing aphids, intermittently planting rutaceae shrub crops (3), and dressing the selenium-enriched fertilizers before 20 to 45 days of the harvesting of each stubble of new teas. The selenium contents of the selenium-enriched organic Wuliqing teas produced according to the method can reach the standard of selenium-enriched tea in NY/T600-2002 edition and the standard of organic tea in NY-5169-2002 edition.

The invention discloses a cut-log cultivation method of polyporusrhinocerus cooke. The method comprises manufacturing of a polyporusrhinocerus cooke parent seed, an original seed and a cut-log cultivation seed, land selecting and preparing, cut-log cultivation seed burying and field managing and collecting. The method overcomes the detects in the prior art, wild growing environment of the polyporusrhinocerus cooke is simulated, the polyporusrhinocerus cooke is cultivated by adopting the cut-log cultivation method, the requirements of nutrition of polyporusrhinocerus cooke sclerotium are met, and therefore superior sclerotium is formed.

The invention discloses a sowing high-yield cultivation method for wheat in arid land and belongs to the technical field of cultivation of food crops in the arid land. The sowing high-yield cultivation technical method for the wheat in the arid land includes the following steps: a plowing layer is deepened through deep plowing, and accumulation of rainfall is increased; all applied fertilizer serves as base fertilizer by being combined with the deep plowing and is applied into soil deeply; after soil preparation, ridges are not formed, and flat-planting is conducted with equal line spacing. The sowing high-yield cultivation method for the wheat in the arid land is suitable for Shandong province and Huang-Huai-Hai winter wheat dry farming areas. The yield-increasing potential of the wheat in the arid land can be fully exploited, and the fertilizer and water utilization efficiency is improved. The cost is lowered, and the land output is increased. The agricultural water is saved, and the yield of the wheat in the arid land is improved. Good economic benefits, social benefits and ecological benefits are generated. In June 2012, experts from units such as China Agricultural University and the provincial agricultural technology extension master station conduct yield prediction and acceptance check to arid land wheat high-yield demonstration fields of the sowing high-yield cultivation method. As is shown by on-site repeating survey by the experts, the average yield per mu of ten mu of high-yield tackling fields achieves 703.5 kilograms, and therefore a new record for the average yield per mu of the wheat in the arid land in the country is set.

The invention discloses a plantation method for celery. The plantation method comprises the steps of seed pretreatment, sowing and seedling raising, soil preparation and fertilization, field planting, field management, harvesting and the like. The plantation method for the celery is scientific, reasonable and high in production efficiency. In addition, according to the method, management is convenient, the yield of the celery can be increased by forty to fifty percent, the produced celery is high in quality, good in taste, rich in nutrition, safe and free of pollution, meets the market requirement completely, and is of great significance in production increase and income increase for farmers.

The invention provides an angelica dahurica planting method. The method comprises the following steps: soil preparation, sowing, field management, pest prevention, harvesting, processing, seed reserving for planting and the others. According the method, during sowing, a planting matrix is used for cave filling, plant ash is adopted to cover the matrix, and then a piece of crape covers the matrix, so that the germination rate is higher, the pest diseases are few, the planted angelica dahurica is high in organic selenium content, and the average yield of the angelica dahurica can reach 570.8 kg, the quality of the angelica dahurica is obviously improved, and angelica dahurica with top quality can reach 40 percent.

The invention discloses a modifying agent for soda-alkalized paddy field soil. The modifying agent is prepared by mixing polyferric sulfate with polyaluminum sulfate according to the weight ratio of 1:(0.6-1.4) and is suitable for modifying severe soda-alkalized soil into a paddy field; and the modifying method comprises the following steps of: applying the modifying agent to the paddy field soil of the field prior to soil preparation, wherein the application rate is 5.6-18 tons per hectare of soil; carrying out normal soil preparation; and soaking and leaching the soil after the modifying agent is sufficiently mixed with the soil. Compared with the polyferric sulfate, the unit cost of the modifying agent for the soda-alkalized paddy field soil disclosed by the invention is reduced by 9.4-15% under the condition that the same effect is maintained; and compared with the aluminum sulfate soil modifying agent, the macromolecular polymer of the modifying agent has a better flocculation effect and higher modifying efficiency, and meanwhile, the concentration of activated aluminum of soil is controlled to be in a low-concentration level, which is harmless to crops.

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%.