1261 results about "Euryhaline" patented technology

A method for improving and utilizing the serious saline-alkaline land at seaside includes such areas as digging ponds to build high-level field, arranging water supplying and draining ditches in the field, planting agricultural crops in the high-level field, and culturing aquatic animals in ponds.

The invention provides a saline land improvement method and belongs to the technical field of saline land improvement. The saline land improvement method comprises the following steps of locally smashing straws of plants growing in a saline land and then spreading the straws on the saline land, continuing to sequentially spread a composite microbiological material for renovation and urea on the surface of the saline land spread with smashed straws, and plowing and watering the saline land spread with the smashed straws, the composite microbiological material for renovation and the urea on the surface, wherein the composite microbiological material for renovation comprises raw material components: 4-6 parts by weight of organic manure, 2-4 parts by weight of humic acid, 0.7-3 parts by weight of agricultural organic waste, 0.2-0.4 part by weight of marine organic waste, 0.01-0.02 part by weight of liquid fungicide and 0.005-0.01 part by weight of solid fungicide. The saline land improvement method has the advantages of being low in renovation cost, small in working amount, convenient to operate and free of secondary pollution.

The invention relates to a comprehensive improving method for coastal saline soil. The method includes the steps as follows: 1) underground desalting; 2) improvement of soil physical structure; 3) salt leaching by a great quantity of water; 4) application of microorganism bacterial manure for soil improvement; and 5) plant arrangement and transplantation. The engineering patent technology of desalting using covered conduits, the technical measures for improving the soil physical structure and the improvement of microbial manure are firstly integrated by the comprehensive improving method so as to conduct sequential and comprehensive work. The comprehensive improving method is remarkable in the effect of soil improvement and has the advantages of effectively reducing the salt content in high saline-alkali soil in short time (within one growing season), preventing secondary alkalization, increasing soil fertility and establishing microorganism communities; beneficial microorganisms relieve the threat and the harm of salt and alkali to plants in the original saline soil, accelerate soil ripening and promote the greening progress of the original soil; and the survival rate of plants in the same year is up to above 95% and the water resource is saved.

The invention discloses a saline-alkali soil improvement method. The saline-alkali soil improvement method comprises the following steps: a step I of leveling and cultivating, wherein the saline-alkali soil is firstly leveled and then deeply cultivated by 40 centimeters by virtue of deep-ploughing machinery; after being diluted by 100 times with water, green manure nutrient liquor brewed by a three-in-one leavening agent is used for irrigation; a step II of applying fertilizer and cultivating, wherein aeolian sandy soil easily obtained locally is uniformly scattered on the surface of primarily leveled and cultivated soil; a step III of preparing rectangular pieces of land in a field and planting, wherein planting ridge rectangular pieces of land in the field are designed and manufactured; a step IV of subsequently governing, wherein measures of not using fertilizers and substances which are not chemically synthesized in early-stage, middle-stage and later-stage filed management processes after the plants are planted, not watering and uninterruptedly irrigating the green manure nutrient liquor are taken. The saline-alkali soil improvement method disclosed by the invention can be used for strengthening soil fertility, and changing physical and chemical properties and microbial activity of the soil.

The invention relates to a method for planting pollution-free rice rich in selenium by adopting biotechnology, belonging to a planting method of plants; the planting method comprises the steps of land selection, soil preparation, application of the soil activator Medina, variety selection and seed treatment, seedling strengthening by means of dry raising and spaced planting cultivation, timely rice transplanting and reasonable compact planting, adequate fertilization, scientific irrigation, adoption of selenium supplementing and transforming technology, comprehensive prevention and control of diseases and pests, harvesting and threshing, drying and storing. The method of the invention has obvious effect; proved by field production trials, the application of the biologics of the Medina can increase the plant yield by 20 percent to 40 percent and decrease the fertilizer dosage by 25 percent to 50 percent and improve the rate of emergence in saline and alkali waste lands by 40 percent to 80 percent; the method can overcome diseases of continuous cropping effectively, eliminate soil crusting and optimizing greenhouses, etc. so as to preserve the soil properties of land capability.

The invention discloses a method for biologically improving saline-alkali soil. The method includes the steps of 1, deep ploughing and deep tilling the saline-alkali soil and making the saline-alkali soil exposed under the sun, 2, digging wells to lower the underground water level, 3, constructing tall ridges, 4, adding biological modifiers and turning over the soil after the biological modifiers are evenly broadcasted to effectively increase organic matter and nutrients in the soil, loosen the soil, enrich microbial flora in the soil, increase activity of the soil, and neutralize saline and alkaline through some activated adsorption base ions in the modifiers, and 5, planting oats to absorb part of the base ions in the soil, convert the base ions into substances needed by growth of the oats and reduce the content of saline and alkaline of the soil. The method can be suitable for saline-alkali soil formed due to different factors, and the saline-alkali soil is improved through physical measures, water conservation measures, utilization of the biological modifiers and plantation of the oats. The method has the advantages that improvement economic benefits can be achieved early, operation is easy to conduct, promotional reproductively is high, improvement is sustainable, effects can be accumulated, in situ saline-alkali soil improvement can be achieved, and improvement cost is reduced.

The invention relates to saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer has a low cost and high fertilizer efficiency, is economic and environmentally friendly, improves a soil water binding capacity and permeability, and has functions of keeping fertility, slowly releasing fertilizer and reducing paddy rice salinization. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer comprises biomass charcoal, chicken manure, pyroligneous liquor, fermented soybean meal and potassium humate. The biomass charcoal is prepared by thermal cracking charring of biomass raw materials under anoxic conditions. The saline-alkali soil paddy rice special-purpose carbon-based organic fertilizer can be used for paddy rice plantation, can improve a saline-alkali soil environment and can improve an organic paddy rice yield.

The invention relates to the field of planting of vegetables, in particular to a method for growing pepper. The method comprises the following steps: firstly, seedling management, namely, seedling raising nutrient soil is used for cultivating pepper seedlings; and secondly, planting management, namely, cultivated pepper seedlings are planted and then the planted seedlings and pepper in different growth periods are sprayed and / or irrigated with pepper nutrient solution. With the pepper growing method provided by the invention, pepper can be prolific for a long time and particularly on saline-alkali soil in Pearl River delta area of Guangdong, red cluster pepper can be picked for three consecutive months, the yield can reach 2000 to 3000 kilograms per mu and can be increased by 30 to 50%, and meanwhile, the quality of pepper can be improved by a big margin, reaching export standards.

The present invention relates to a method for improving saline-alkali soil. Said invention utilizes straws and stalks of crops and plant branch and leaf as base material, and adopts the following steps: soaking the base material in fungous solution, binding it into the column form, making the column-form base material be embedded into the soil vertically according to the network form, utilizing the dialysis produced by said network-shaped base material and soil to prevent the salt content in the underground water from dire4ctly rising to soil surface and concentrating to make soil be salinized. Besides, covering the soil surface with pulverized straws and stalks of crops and plant branch and leaf, making irrigation by using the invented irrigation liquor, ploughing to make soil be loosened so as to attain the goal for improving saline-alkali soil.

The invention relates to a method for planting Suaeda salsa on serious saline-alkali soil by trickle irrigation in arid areas, and the method comprises the following steps: overlaying an irrigation facility in a heavy salinization soil environment; arranging hollow billet trickle irrigation zones in a mode of one pipe in one row; in a strip cropping mode, planting halophyte seeds on two sides of the hollow billet zone; dripping after sowing is finished to prevent seeds from being blown by wind; and combining with a water-saving trickle irrigation technology, causing soluble salt in the areas near the trickle irrigation billet trickle zone to transfer along with water or transfer to direction far away from the billet trickle by controlling the trickle irrigation flow so as to create a low-salt environment for halophyte seeds to germinate and young seedlings to grow, thereby planting the young seedlings. According to the method disclosed by the invention, inhibition on halophyte seed germination and young seedling growth by the heavy salinization soil environment can be overcome, a technical mode for developing the agricultural production on the common big rinsing salt improved saline-alkali soils can be broken through, and ecological economy halophyte is planted on a large scale so as to accumulate technical reserve for developing and utilizing the large-area saline-alkali soilwasteland in arid areas.

The present invention relates to saline alkali land corn base fertilizer, and specifically to a saline alkali resistance corn base fertilizer and a preparation method thereof. The corn base fertilizer comprises, by weight, 150-250 parts of an organic matter, 100-200 parts of calcium sulfate, 5-10 parts of urea, 100-200 parts of compound fertilizer, 2-5 parts of an active cover agent, 20-40 parts of a porous inorganic substance, 150-250 parts of an acidic liquid, and 0.1-0.5 parts of a compost fermentation agent, wherein the compound fertilizer mainly comprises N, P, K and Zn, the weight ratio of the N to the P to the K to the Zn is 1:0.80-1.10:1.20-1.60:0.40-0.70, and the use amount of a N fertilizer slow-release agent (dicyandiamide) is 2.0-3.0% of the use amount of the N fertilizer. According to the present invention, the special corn fertilizer has an effect of regulation of the pH value of the soil; the considerable organic material, the porous inorganic material, and the like are added, such that the effects of soil structure improving, soil organic matter improving, and soil fertility improving are provided; the utilization efficiency of the N in the compound fertilizer can be improved by matching the corn base fertilizer with the N fertilizer slow-release agent.

The invention discloses a method for cultivating alfalfa in a low- salt and -alkali cultivated land, relates to a method for cultivating the alfalfa and solves the problems of low rate of emergence, low yield and low alfalfa wintering rate in a saline and alkaline land by the conventional alfalfa planting method. The method comprises the following steps of: 1, turning over soil of the low- salt and -alkali land in autumn and forming ridges; 2, softening and air-drying alfalfa seeds before sowing; 3, ditching in spring, watering, sowing and preventing against insects and weeding; 4, mowing in an early flowering season and mowing once every 30 to 40 days until 20 days before frosting; 5, mowing for the last time after frosting; and 6, keeping 16 and 25 percent of the water content (mass) of the soil in an alfalfa land after reviving in a second year, performing normal fertilizer and water management and mowing. The rate of emergence of the method is between 80 and 90 percent, grass yield in a first year is 25 to 28 percent higher than that of the conventional method and wintering rate is between 78 and 92 percent. The method is suitable for cultivating the alfalfa in the low- salt and -alkali cultivated land.

The invention relates to a microbial agent for repairing petroleum-polluted saline alkali soil and a preparation method thereof, and belongs to the technical field of resource environment. According to a principle of microbial ecology, microbial community is extracted and screened from soils with high salt and alkali and high petroleum pollution to prepare the microbial agent, wherein obligate petroleum degrading bacteria can be sphingolipid bacteria, comamonas, chitin autophagy bacteria and bacillus. According to culture medium and soil environment experiments, the microbial agent can guarantee that the extracted microorganism can be survived in the soils with the salt content of 5,000mg / kg, and meanwhile, the degradation capability to the polluted soils with the petroleum content of 10-50g / kg can reach 80%. The microbial agent has the advantages of simple process, rich microorganisms, obvious dominant bacteria, good stability and capability of facilitating obligate petroleum degrading bacteria to adapt to a new pollution environment, increasing and improving the micro-ecological environment quality of the soils and avoiding secondary pollution to the environment, and can obviously improve the degradation efficiency of petroleum hydrocarbon in the saline alkali soil.

The invention discloses a tree planting method and a tree planting structure in a coastal saline and alkaline area. The tree planting method comprises the steps of building a cofferdam, arranging a lifting layer, carrying out salt pressing and alkali discharging on the lifting layer, digging planting holes, paving waterproof geotechnical cloth, paving a broken stone water filter layer, paving a straw curtain water filter layer, backfilling planting soil and planting trees. According to the tree planting method disclosed by the invention, after the steps and measures are comprehensively adopted, the salt returning period of saline and alkali soil can be slowed down, good conditions are created for the surviving and the growth of the trees due to the soil fertility of the planting soil, and a greenery landscape can be easily formed after the trees are planted; since the terrain is lifted, saline and alkaline original soil is relatively reduced, alkali discharging pipes are not needed to be paved in specific construction, the period of salt discharging and alkali controlling is reduced, and the cost is reduced. The tree planting method and the tree planting structure, disclosed by the invention, are suitable for being popularized and applied in a greening process of the coastal saline and alkaline area.

The invention relates to a microorganism composite bacterial agent applicable to the restoration of saline alkali soil polluted by petroleum, and a preparation method thereof, and belongs to the technical field of environment protection. The bacterial agent mainly comprises the following 3 components: composite microorganism bacterial liquid, nutrients, and a surfactant. The composite microorganism bacterial liquid is obtained by performing liquid culture of 3 petroleum hydrocarbon degrading bacteria of bacillus megaterium P9 strains (with a preservation number of CGMCC No. 4270), pseudomonas sp. P4 strains (with a preservation number of CGMCC No. 4269), and achromobacter xylosoxidans P2 strains (with a preservation number of CGMCC No. 4268) to obtain microorganism bacterial strains, and mixing the strains with the nutrients. The bacterial strains are preserved at China microorganism strain preservation management committee general microbiological center. The composite microorganism bacterial liquid, the nutrients and the surfactant are mixed according to a ratio of 30-200:1-2:0.2-0.5 so as to obtain the microorganism composite bacterial agent. The microorganism composite bacterial agent prepared by the invention has high removing efficiency for petroleum pollution in saline alkali soil, can both reduce the pH value of the saline alkali soil, and improve soil physical and chemical properties.

The invention provides a drip irrigation greening forestation method for saline-alkali land in a coastal area, which comprises the following steps of: A, paving a filtering layer, namely, paving the filtering layer at a position 40 to 80cm distance below the ground and filling original soil on the filtering layer; B, leveling the land and ridging when shrubs and arbors are planted; C, selecting and planting trees or grass seeds; D, arranging a drip irrigation tape, namely, arranging the single drip irrigation tape in the middle of tree planting ridge, or paving the drip irrigation tape at intervals of 30 to 100cm on a lawn; and E, irrigating, namely, irrigating for the first time once planting on the same day and then irrigating according to the actual moisture condition of the soil, wherein the irrigation quantity is more than four times the daily irrigation quantity. The invention adopts a method combining ground drip irrigation with filtering layer pavement so as to form a desalting region in a plant root region and ensure the regular growth of plants. The method solves the problem that the soil structure is damaged after the saline-alkali land with high content of sodium ions is washed, so the method can keep the good soil structure of the soil and provide a good growing environment for the plants.

The invention discloses a method for controlling salt and saving water of nutritional soil for planting crops on a mudflat saline-alkali land. The method comprises the following steps of: determining a salt control target value according to a salt-tolerance threshold of planted crops; restraining salt content and making moisture by irrigating soil moisture water into the mudflat saline-alkali land; performing deep plowing and deep tillage after the soil is dry; paving crushed crop straws under the surface of the soil; seeding after leveling the land; and finally returning the crop straws into the land for covering a sown land surface. Due to the adoption of the technical scheme, water resource is saved; and the irrigation amount can be reduced in the growth and development stages of the crops. When the soil moisture water is irrigated before sowing, because a four-electrode salt content sensor is adopted for monitoring a desalting process of the soil in real time, an irrigation salt control target and irrigation stop time are defined, and water resource loss is reduced; simultaneously, the straws are buried deeply and covered on the land surface, continuous damage caused by a capillary action is caused; an uplink surface congregation effect of the salt content in subsoil and underground water is prevented; soil salt return is inhibited effectively without irrigating for washing the salt in a dry season so that the water resource is saved; in addition, water loss is reduced because of the coverage on the surface of the land, the moisture keeping effect of the soil is improved and the irrigation amount in the growth and development stage of the crops can be reduced.

The invention relates to a method for restoring petroleum-polluted saline alkali soil by ryegrass and high efficiency microbes. The invention belongs to the technical field of environment restoration, and relates to a method for restoring soil by microbe microbial inoculums and plants. The method comprises the following steps: pretreating soil, preparing different microbial inoculums, planting ryegrass, and managing according to the normal requirements for plant growth after sprouting. Microbes and microbial inoculums can cooperate to perform the synergistic action; the addition of the microbe microbial inoculums can promote the plant growth, improve the structure of soil and reduce the pH value of soil, so that environmental conditions which are beneficial to pollutant degradation are formed in the soil. Ryegrass and other garden plants have the functions of promoting petroleum hydrocarbons to degrade and greening the landscape, and can be used as a feed on the premise that the pollutants of the reaped ryegrass do not exceed the standard, thereby having certain economic benefit. The invention enhances the degrading effect of petroleum hydrocarbons, and the degrading rate of petroleum hydrocarbons after five-month growth, can reach 57%. The technique can reduce plowing required by the restoration which only uses microbes and supplement the measures for microbial inoculums, and has favorable effect of removing petroleum hydrocarbons in soil for a long time.

The invention is concerned with complex improvement method for farm soil and vegetation to salina. It carries the improvement about the soil with 0.4 m thickness, relating to cutting piece, digging main pouring blind drain and branch pouring blind drain channel, making small square farmland filled with clear arsenolite, backfill soil and return to even, beat sand hole, making fall of slope, wash salt and eject salt, fertilization and tillage deeply. The improvement soil is fit for all kinds of crop, greensward and perennial flowers, and forms the soil for foodstuff crop, plant with shallow root and flowers. Its investment is low and the amount of a unit of area is at least 5000, and the improvement fee reduces greatly and it adds the plant area of farm and enhances the output of foodstuff and vegetable. It protects the soil resource to add the area of foodstuff planting, and it is an economic, extensive, simple and indirect technology for agricultural salina.

The invention discloses a saline-alkali soil improving method by engineering-chemistry-biology-desalination and water conservation-information technology. The saline-alkali soil improving method includes steps of S1, lowering salt content in the saline-alkali soil to be treated gradually by engineering measures and isolating and discharging soluble salt in the soil; S2, reasonably utilizing water resource of the saline-alkali soil to be treated by brackish water desalination technology; S3, reasonably irrigating the saline-alkali soil to be treated by water-saving irrigation technology; S4, online detecting the saline-alkali soil to be treated by information technology; S5, improving chemical components of the saline-alkali soil to be treated by chemical measures; S6, finally improving the saline-alkali soil to be treated by biotechnology measures. The saline-alkali soil improving method provides a feasible, economic and efficient scheme for improving the saline-alkali soil in coastal regions, improvement time is short, effect is good and no backflow is caused after improvement.

The invention discloses a comprehensive improvement method suitable for inland extreme arid area saline-alkali soil. The method is formed by integrating multiple technological innovations of levellingsoil and eliminating salt accumulation in surface soil, returning straw to field and improving a soil body structure so as to block a salinity ascending channel, additionally applying an organic fertilizer and optimizing fertilized soil to improve a crop saline-alkaline tolerance capacity, deep-plowing soil and adjusting grain compositions so as to retard salinity ascending, additionally applyingan improver and creating a low-salt rhizosphere micro-environment, covering by straw and preventing soil salt return, rationally irrigating for salt-leaching and desalting and the like. The technology can be applied for performing straw simplification on preceding crops and rapidly and directly returning to the field, relieving labor intensity of a farmer, adequately using straw nutrient resources for usage by crops in the next season, reducing an applying quantity of a chemical fertilizer, and reducing agricultural production cost. An isolating layer is formed in a soil body, so the ascending of underground water and salinity in the lower soil body is retarded, and the salt accumulation in the surface soil and the salt return are reduced. The method has multiple functions of improving the saline-alkali soil, improving production capacity of cultivated land, increasing production, saving cost and increasing income and the like, and is remarkable in economic, social and ecological environment benefits.

The invention discloses a gingko planting method and belongs to the technical field of traditional Chinese medicine planting. The method comprises the steps of 1) land selection and preparation including land selection, fertilizer application, land leveling, ploughing and bedding; 2) seedling cultivation including seed collection, breeding nursery garden construction and seedling planting: 3) transplantation and planting including seeding hole digging, fertilizer application, transplantation at a male-female ratio of 95:5, soil covering and watering; 4) field management including intertillage, topdressing, pruning and pollination; 5) insect and disease prevention. According to the gingko planting method, during the leveling process, acid modifier composed of vinegar residue and decomposed straw fertilizer is applied, so that gingko can be planted and grow in saline-alkali soil, and further compared with the situation that saline-alkali soil is unsuitable for growth of gingko in the prior art, the gingko planting method widens the gingko planting area. The gingko planting method also has the advantages of being high in emergence rate, high in seedling disease resistance and the like.

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 discloses an arid region saline-alkali soil biology improvement method which comprises the following steps: conducting ditching salt avoidance and drip irrigation salt drench to create a low salt moist soil environment that seed germination needs, in the first year, excess salt of farmland plough layer soil is removed through halophyte above ground part cradling, and in the second year, improvement of soil fertility can be realized through salt tolerance leguminous green manure plant. The method is sample and convenient to operate and low in cost, by adopting the halophyte to gather salt and salt tolerance leguminous green manure plant to fertility soil, rapid desalt fertility of saline alkali soil can be realized, saline-alkali soil biology improvement and cyclic utilization mode is built, and the problem that saline-alkali soil common water conservancy improvement is difficult under the background of water resource shortage is avoided.

The invention relates to a comprehensive restoration method for a salt-alkali degraded marsh wetland in a plain area, in particular to a restoration method for the salt-alkali degraded marsh wetland, and solves the problem that a satisfactory effect cannot be achieved as a land leveling technology, a hydrologic control technology or a wetland plant cover restoration technology is singly used in the conventional restoration process for the salt-alkali degraded marsh wetland in the plain area. The comprehensive restoration method comprises the steps as follows: 1, leveling land; 2, hydrologically controlling the salt-alkali degraded marsh wetland to be restored in the plain area; and 3, carrying out plant cover technology treatment on the salt-alkali degraded marsh wetland in the plain area. The comprehensive restoration method can be applied to the field of a restoration project for the salt-alkali degraded marsh wetland in the plain area.

A method for increasing greening survival rate of seashore solonchak belongs to the technical field of seashore solonchak greening and is characterized by including steps of firstly, selecting tree seeds; secondly, planting trees; thirdly, improving soil; fourthly, reinforcing plants; fifthly, interplanting with manure; and sixthly, maintaining virescence. The method for increasing greening survival rate of seashore solonchak has the advantages that covering soil balls with rice chaff is low in cost, seedling roots are promoted to grow early, stress resistance is improved, and soil ventilation is enhanced; survival rate of seedlings is high and can reach more than 90%; both trees and shrubs can grow normally for a long period of time and never die of intolerance to salt and alkali two to three years after survival; and improvement is effective and salt content is lowered greatly.

The invention discloses a cultivation method for improving corn yield in saline-alkali land. The method comprises the following steps: irrigating the saline-alkali land for flooding for once in the middle of March, wherein the irrigation volume for per mu is 60-100 m<3>, airing for 1-1.5 months until the surface of earth is dry enough to allow people to step on, applying 1000kg-1500kg of miscellaneous manure or 50kg-55kg of compound fertilizer per mu, then performing rotary tillage for 1-2 times to mix soil and the fertilizer, pressing by using a harrow and preserving soil moisture, and leveling the surface of earth; treating corn by using a seed coating agent before the corn is seeded, wherein the seed coating agent comprises actinomycin, bacillus mucilaginosus, azospirillum, diatomite, spicy powder, heteroauxin, potassium sulphate, magnesium sulfate, zinc sulfate, an alpha-pimacol growth regulator, an EDTA-2Na chelating agent, humic acid and turf; mixing bactericide and insecticide with seeds for treating the seeds, namely, firstly adding the insecticide, and then adding the bactericide after piling for 3-6 hours; and immediately seeding after the seed mixing treatment is finished.

The invention relates to a land transformation method, in particular to a saline and alkali land improvement method. The method comprises the following steps: the saline and alkali land to be improved to is changed into an alternant land for a trench land and ridges; a layer of fine flowing sand or sandy loess with thickness of 3-3.5 cm is evenly laid on the trench land, the saw powder and the chopped grass with thickness of 1-1.5 cm are laid, and the plowing depth is 5-15 cm and is not excessively deep; the trench land is filled with water during the watering process and the ridge cannot be filled with water as possible; the saline and alkali tolerant high-quality corn variety is selected and planted or the agropyron elongatum can be planted; after the young seedlings grow out, the traditional intertillage management is carried out; after the seeds are harvested, the straw returning is carried out; as for the land tillage in the second year, the sand with thickness of 2-5 cm is laid, the saw powder and the chopped grass with thickness of 1-3 cm are laid, then a certain amount of farmyard manure is applied and the rest is the same as the tillage in the first year; as for the land tillage in the third year, the ridges on both sides of the land are respectively taken as the lands with one eighth width during the tractor-ploughing process, so the trench land is increased, and other parts are repeated according to the tillage in the second year; as for the land tillage from the fourth year to the sixth year, the tillage method in the third year is repeated; and the improvement of the whole saline and alkali land is finished after six years. The invention can enable the saline and alkali land to be changed into a fertile land, thereby thoroughly harnessing the saline-alkali land.

A method for rebuilding and maintaining vegetation ecosystem and pasture production system in semiarid wind sand area relates to the technical fields, such as agricultural water and soil conversation, prevention and control of desertification, pasture cultivation and ecological environment etc, wherein perennial pasture with properties of drought resistance, nitrogen fixing, cold resistance and saline alkali resistance is adopted to combine with a multifunctional ecological film compound fertilizer functioned to bond and fix sand, absorb dampness and infiltrate water, conserve water and soil, fertilize sand and nourish sprout, preserve heat and promote growth. The technical scheme is that: selecting in April or May in spring, on the basis of flat sandy land, after seed soaking, planting the perennial pasture plants, such as varied lobular clover, Astragalus adsurgens pall, sainfoin, vetch, Agropyron desertorum etc; then adopting a method of a spraying can or an agricultural tractor mating with a high pressure water pump; or burying a plastic pipe in the ground, one end of the plastic pipe being connected with a water pump of a large-scaled fertilizer film mixing tank and the other end thereof being connected with a spraying nozzle; spraying the multifunctional ecological film compound fertilizer by adding water in 50 to 60 times such that an ecological ground film with thickness about 2 mm is naturally formed on the surface of the earth; three processes of spraying water, applying fertilizer and laying film can be completed at the same time so as to synchronously build up an ecological vegetation and pasture production system.

The invention relates to a method for transplanting a large-sized landscape tree in saline-alkali soil. The method is characterized by mainly comprising the following steps: (1) preparing a seedling tree; (2) preparing a tree pit: (a) digging the tree pit; (b) laying a water seepage layer; (c) laying nutritional soil; (3) carrying out tree planting: (a) coiling a nutrient tube at the outer circumference of a soil ball; (b) adjusting the tree pit planting direction of the seedling tree; (c) arranging an observation well pipe at one side of the soil ball; (d) backfilling improved soil; (4) maintaining: (a) observing the water accumulation condition of the root of the tree; (b) conveying nutrient solution through the nutrient tube. The invention also relates to a structural layout of the tree pit for transplanting the large-sized landscape tree in the saline-alkali soil, wherein the water seepage layer is laid at the bottom of the tree pit, the nutritional soil is laid on the upper surface of the water seepage layer, and the observation well pipe is arranged. Compared with the prior art, the method and the structural layout have the advantages that the problems in large tree transplanting that the survival rate is low, the growth is slow, and the like are solved on the premise that an isolating layer is not arranged and a water seepage pipe or blind ditch is not laid to remove salt, the survival rate of the large tree transplanted in the offshore saline-alkali soil is increased remarkably, in addition, the implementation is simple and convenient, the cost is reduced, and the like.