294 results about "Ecological engineering" patented technology

The invention belongs to the technical field of ecological engineering and particularly relates to a method of vegetation restoration and reconstruction of a bare rock slope in East China. the engineering materials such as active plant material and synthetic geonet are utilized, a plant-growing substrate (plant tool species seed, nutritional soil and binder) is uniformly mixed according to a certain proportion and injected on the rock slope according to the design thickness by a special injection device for the plant-growing substrate, an ecological environment which can ensure normal growth of the plant is created on the rock slope, the slope reinforcement and vegetation restoration are realized through the growth of the plant and other auxiliary functions, and the purpose of vegetation reconstruction of the bare rock slope is achieved. The method is applicable to the vegetation restoration and reconstruction of the bare rock slope in East China with respects to plant tool species and medium formulation and obtains obvious ecological benefits after several years of implementation and popularization.

To deal with climate change, the present invention provides an eco-engineering for systematic carbon mitigation, in particular, a comprehensive carbon management system with a group of Stabilized Functional Carbons (SFCs) to reduce the total amount of carbons in atmosphere. SFCs are sourced and manufactured from the carbon-fixed biomass by one of the seven thermo-chemical treatments or one dehydration treatment with no less than 75% carbon conversion rates of the source material. The present invention transforms the perishable biomass into SFCs, which act as a carbon sink with stability and safety for at least 40 years' storage. The primary eco-friendly carbon and non-carbon mitigation are achieved by the sourcing, manufacturing and storage of SFCs. The advanced eco-friendly carbon and non-carbon mitigation are achieved at various pollution emission sources by the resource utilization of SFCs. An annual total amount of 0.5-10 billion tons of carbon emission could be reduced globally.

The invention provides an experimental apparatus for simulation research on water quality and quantity of biotical retained elements under an artificial rainfall condition. The experimental apparatus comprises a rainwater storage tank, a water pump, an aqueduct, a supporting frame, a water quantity regulation tank, a valve, a water outlet pipe, a spray head, rainfall holes, a porous water distribution plate, an experimental soil bin, a small sampling perforated pipe and a large sampling perforated pipe, wherein the lower outlet of the rainwater storage tank is connected with a water inlet of the water pump; a water outlet of the water pump is communicated with the water quantity regulation tank arranged on the supporting frame through the aqueduct; the outlet of the water quantity regulation tank is provided with the valve and connected with the spray head through the water outlet pipe; the porous water distribution plate which is provided with a plurality of rainfall holes is arranged under the spray head and above the experimental soil bin; and the small sampling perforated pipe is positioned on the central part of the experimental soil bin, while the large sampling perforated pipe is positioned on the lower part of the experimental soil bin. The experimental apparatus for the water quality and quantity simulation research on the biotical retained elements under the artificial rainfall condition has a simple structure, can regulate rainfall intensity and uniformity, and realize water sampling of soil in different time and different structural space, and has an application prospect in the field of environment engineering and ecological engineering.

The invention relates to a farmland runoff pollution ecological intercepting ditch. The cross section of the ditch is trapezoid; the two walls and the bottom of the ditch are hardened by a concrete plate on which a plurality of rectangular holes are formed, and plants which have high capacity of absorbing nitrogen and phosphorus are planted in the holes; a plurality of check gates are arranged in the ditch; and the bottom of the ditch is provided with a plurality of filter boxes arranged in an S shape, holes are distributed on the four walls of each filter box all over, an adsorbing material which has high capacity of adsorbing the nitrogen and the phosphorus is filled in each filter box, and the plants which have high capacity of absorbing the nitrogen and the phosphorus are planted in the filter boxes. By the farmland runoff pollution ecological intercepting ditch, the nitrogen and the phosphorus in farmland drainage can be effectively intercepted, and the intercepting rate is over 50 percent and over 60 percent respectively; suspended matters in the farmland drainage can be effectively intercepted, and the intercepting rate is over 95 percent; the conventional farmland drainage ditch can be fully utilized, and the problem that ecological engineering occupies more cultivated land is solved; and engineering cost and maintenance cost are low, and the ditch is easy to operate and maintain and convenient to popularize and apply in a large area.

The invention belongs to the field of ecological engineering and relates to a construction method of spraying and covering planting in an ecological restoration project, namely, a vegetation restoration method adopting a plant fiber blanket with the assist of slurry spraying. The invention is characterized in that the method comprises the following steps: laying a slope through the plant fiber blanket firstly, spraying and covering the slope through slurry and covering the slope through the plant fiber blanket. In the invention, a three-dimensional net made of geotextile material can be replaced; chemical synthetic materials entering the natural world can be obviously reduced when the effect of improving the overall and local stability of the slope is achieved; moreover, vegetable fiber can also increase organic components of soil, is beneficial for improving the capacities of water retaining and constant-temperature keeping of the soil on the surface layer and is beneficial for the growth of vegetation on the slope; when the construction cost is reduced, the low carbon conversion and utilization of agricultural and forestal residuals are realized, agricultural and forestal chains are extended, and the industrial added value of by-products is improved; and the method has a large application value in the soil and water conservation, sand prevention and control and ecological restoration of the damaged vegetation in a project in China.

The invention belongs to the technical field of environmental protection and ecological engineering, relates to topological micro-reformation and vegetation restoration, and discloses a vegetation restoration method applicable to degraded plateau and lake wetlands. The vegetation restoration method is low in personnel and capital investment and mainly includes stages of background evaluation, selective enclosure and livestock reduction, topological micro-reformation for the wetlands and construction of screened plant communities or plant zones. The vegetation restoration method has the advantages that plateau wetland vegetation restoration is accelerated, wetland vegetation ecosystems are constructed, and the environmental quality of the degraded wetlands is improved.

The present invention relates to an engineering method for producing biochar soil from dredging sediment, and belongs to the field of solid waste resource utilization. The biochar soil is prepared by uniformly mixing the raw materials of dredging sediments, poultry manure and dry straw according to a certain weight proportion, adjusting the C / N ratio and moisture content of the mixture, adding a certain proportion of a nitrogen retention and water-retaining agent; carrying out windrow composting by a mechanical turning and static forced ventilation combined manner for about 30 days, maintaining the pile at 55-65 DEG C for 10-12 days until the full maturity of the compost products. The biochar soil is utilized according to actual need. The invention realizes large-scale engineering treatment of dredging sediment, poultry manure and crops straws, provides an ecological way to solve the non-point source pollution caused by dredging sediment and poultry manure, and air problem caused by crops straws burning; and the compost products can be used for ecological engineering construction, so as to organically combine environmental benefits, economic benefits and ecological benefits.

The invention belongs to the technical field of ecological engineering, particularly relating to a multifunctional lake ecology restoration simulation device and use method as well as application. The device comprises a multifunctional ecology restoration simulation test cylinder, a light source control system and a water temperature control system, wherein the light source control system and the water temperature control system are positioned outside the top of the test cylinder; the outer surface of a reaction cylinder is provided with a top cover, a culture liquid inlet and a circulating water outlet; the middle of the reaction cylinder is provided with a water sampling port, and the lower part of the reaction cylinder is provided with the circulating water inlet, a substrate sludge pore water sampling port and a bottom plug; and the test cylinder internally comprises a nitrogen cycle bacteria carrier, submerged plants and settings. By using the method and device, the comprehensive regulation and control as well as optimization of parameters such as settings, submerged plants, denitrification microorganism, water temperature, light and water quality can be carried out, lake and inflowing riverway nutrient salt can be simulated and controlled, and a lake ecology restoration mechanism can be studied. The device disclosed by the invention is simple in structure, is strong in mobility, is diversified in restoration simulation function, is simple in manufacturing, is low in cost and is easy to operate, and can be used indoor and outdoor.

The present invention relates to the embankment protection in water conservancy and hydroelectric power system, especially inner slope in water reservoir. The plant configuration and ecological engineering technology of the present invention is superior to traditional concrete, laid stone wall, anchor pile and other traditional rigid means, which are lack of ecological effect of purifying water and lasting effect, and superior to available biological engineering means with non ideal effect. The present invention is one ecological engineering technology with vetiver as main body and other plant variety, and has superior ecological effect, lasting slope protection effect, low cost and simple construction process.

The invention provides a method for restoring a slash type degraded wetland. The degraded wetland is restored by adopting one or more of a hydrological connection method, a microrelief transformation method, a matrix recovery method, a vegetation recovery method and a riparian zone slope protection method. According to the specific circumstance of the degraded wetland, the method can comprehensively utilize the whole technical system, and also can separately utilize certain technology. The method improves the landform, a water system, a wetland matrix and the riparian zone environment of the degraded wetland through ecological engineering measures so as to reasonably arrange wetland vegetation from land to open water, construct an optimal wetland vegetation community structure, and effectively improve the stability and the self-maintenance of the degraded wetland.

The invention relates to the fields of environmental engineering and ecological engineering. An ecological check dam prevention and control system for three gorges reservoir region hilly land ravine agricultural non-point source pollution is characterized in that multiple levels of ecological check dams are in trapezoidal distribution with natural fall from high to low along with the hilly land; each level of ecological check dam consists of a water storage regulating pond, a constructed wetland and a check dam main body, which are arranged sequentially according to the water flow direction; the water storage regulating pond is communicated with an overflow port in the previous level of the check dam main body. The system can effectively intercept and control the hilly land ravine agricultural non-point source pollution of the drainage basin, can reduce water and soil loss, can perform water-harvest irrigation, can reduce attenuation of channel nutrients before and after rainfall on sloping fields, and can realize ecological interception of agricultural non-point source pollutants.

The invention relates to a control method of spartina alterniflora, belonging to the technical field of ecological engineering. Spartina alterniflora is artificially introduced in China in the 1980s, and plays a positive role for damping waves, protecting slopes, promoting deposition and reclaiming lands on Chinese coastline, however, as an alien invasive species recognized internationally, the population characters of powerful breeding and rapid extending ability of the spartina alterniflora bring a series of negative effects to the natural wetlands ecosystem of Chinese coastal tidal land and the regional biodiversity; and control of the spartina alterniflora is already a universal problem. The prior single physical, biological or chemical control method has the disadvantages of low efficiency, high environmental pollution risk, low ecological safety, high cost and unobvious control effect. The invention overcomes the disadvantages of the prior preventing and controlling techniques, and utilizes the comprehensive control method of cradling and water level regulating, eradicates the invasive species and controls the growth and rapid extension of the invasive species through restraining the growth of spartina alterniflora, plays an active restoring role to the ecological system destroyed in large areas, and provides an efficient path for preventing spartina alterniflora from spreading extensively in coastal areas.

The present invention belongs to the field of ecological engineering technology. The biomass of the strand mallow is large, its body interior contains a great quantity of biomass energy. Said invention is characterized by adopting various measures to develop and utilize biomass energy of every portion of strand mallow and converte it into salt-tolerant plant with higher economic benefits.

The invention discloses a farmland non-point pollution stepped undercurrent dam ecological purification ditch system. The system has a trapezoidal ditch section; the ditch wall and ditch bottom on two sides of the ditch are provided with seepage-proofing building blocks; hexagonal hole structures are formed in the middle of the building blocks, and plants are planted on the hexagonal hole structures; the periphery of the building blocks are laid with pebbles and fibers; undercurrent dams are arranged in the ditch body in a distance of 10-20m at an interval; an intercepting plate is arranged at a part which is 1m away from the upstream of the undercurrent dam; small holes are formed on the lower part of the intercepting plate; the upstream face of the dam body of the undercurrent dam is provided with a fine grid filtering net; the lower part of the dam body is provided with a filling layer which takes gravel and ceramsite as fillings; the filler particles are gradually thinned along the water flow direction; the upper part of the dam body is provided with a clay layer; and plants are planted on the clay layer. The problem that large land is occupied in ecological engineering is solved, the system has the characteristics of high treatment efficiency, wide application range, good visual effect and the like, the water body is subjected to full-face purification at the normal water level, and the normal drainage and flood discharge functions during large-rainfall period are not influenced.

The present invention belongs to the field of ecological planting technology. By way of ecological engineering design, the use of compound fertilizer trophosome, complex planting and green manure technology, the present invention realizes equilibrious soil nutrient, balancing soil microorganism , increasing disease resistance of plants, reducing pathogen and at same time it solves problems that continuous cropping and coming cropping are impossible and must be planted alternatively after four and five years. It is very important to the development of castor beans planting and the increase of economic benefit of castor bean processing corporation and planting farmers.

The invention relates to a composite constructed wetland used for low pollution water purification treatment of farmlands and villages. The composite constructed wetland comprises a floating plant stabilization pond, a submerged plant oxidation pond and an emergent aquatic plant / hygrophyte ecology gravel bed which are orderly set along a water flow direction, wherein the floating plant stabilization pond is planted with floating plants, the submerged plant oxidation pond is planted submerged plants, and the emergent aquatic plant / hygrophyte ecology gravel bed is planted with emergent aquatic plants / hygrophytes. The composite constructed wetland adopts an ecological engineering processing method, and the operation cost of the composite constructed wetland is low; the total nitrogen removal rate and the total phosphorus removal rate of the low pollution water of farmlands and villages can reach more than 50% and more than 60%. In the composite constructed wetland, the floating plates, the submerged plants, and the emergent aquatic plants / hygrophytes planted in the floating plant stabilization pond, the submerged plant oxidation pond and the emergent aquatic plant / hygrophyte ecology gravel bed are aquatic economic plants which are capable of generating economic benefits and are easy to popularize in rural areas.

The invention belongs to the technical field of ecological engineering, and particularly relates to a device for simulating an in-situ river course sediment anaerobic ammoxidation process, and a use method and application thereof. The device is composed of an organic glass column, a gas collection box on the top of a test column, a water body temperature control system on the surface of the double-layer organic glass column, a computer monitoring unit and an in-situ water body water storage unit. The inside of the simulation test column is provided with a submerged plant (waterweed), an in-situ sediment deposit, a temperature probe, a pH probe and a dissolved oxygen probe. The device can implement real-time monitoring on the temperature, pH and dissolved oxygen in the whole simulation culture process, and can regularly complete determination of gas production condition in the device, determination of the concentration of water body nutritive salts and determination of the anaerobic ammoxidation bacteria related function gene copy number in the sediment deposit. The device is simple in structure, can be operated indoors and outdoors, has favorable effect on simulating the river course anaerobic ammoxidation process, and is convenient to manufacture and low in cost.

The invention relates to the technical field of ecological engineering and water treatment, and particularly relates to an ecological floating bed and a method for purifying a water body. The substrate in the ecological floating bed consists of magnesium slag ceramic filter balls, bentonite particles and zeolite. The ecological floating bed belongs to a porous inorganic material, has the characteristics of developed micropores, high mechanical strength, good adsorption performance and the like, can be used for effectively adsorbing organic matters and partial inorganic matters in the water body, has relatively strong microbial affinity, and is advantageous to microorganism growth and reproduction to improve the biofilm culturing efficiency of microorganisms, so that the water body purification effect can be improved. According to the ecological floating bed, a planting basket can sink into the water body and float on the water surface periodically, so that the substrate can be alternately located in an aerobiotic environment and an anoxic environment, growth and reproduction of aerobiotic microorganisms and anoxic microorganisms can be facilitated, organic matters in the water body can be well decomposed, and nitrogen and phosphor in the water body can be removed. The ecological floating bed is capable of effectively playing effects of the porous substrate, aerobiotic microorganisms, anoxic microorganisms and aquatic plants, and the purification efficiency of the ecological floating bed can be remarkably improved.

The invention relates to the field of ecological engineering and in particular relates to a method for rapidly planting vegetation in saline-alkali bare land. The method comprises the steps of harrowing, building a furrow, taking aeolian sandy soil or farmland soil, mixing the aeolian sandy soil with saline-alkali soil, then mixing with seeds of perennial plants, dibbling the seeds into the furrow, and then covering, and finally carrying out pulled-type rolling. The method disclosed by the invention provides a safe site for seed germination, seedling settlement, growth and propagation of the perennial plants, and the perennial plants can quickly grow on the saline-alkali bare land in salinized and alkalized grassland. Thus, the method disclosed by the invention can rapidly increase covering power of vegetation on the grassland, reduce harm of wind erosion and water erosion in the saline-alkali bare land to adjacent grassland and farmland and protect and improve ecological environment; meanwhile, a large area of saline-alkali bare land can be utilized, high-quality forage grass is provided for development of animal husbandry, and higher ecological, economic and social benefits are produced. The method disclosed by the invention has the advantages that operation is easy, efficiency is high, cost is low, is sustainable and easy to popularize, and the like.

The invention relates to a method for fully utilizing wind and solar energy and substantially improving the efficiency of solar salt, pertaining to the technical field of ecological engineering. The invention comprises a water evaporation system, a suspension device of the evaporation system, a solution regular transmission system and a solution regular distribution system. By adopting the invention, full and sustainable use of the wind energy and the solar energy can be realized so as to speed up water evaporation, reduce energy consumption, shorten the cycle of solar salt and greatly improve salt production and the original production and design capacity on the basis of not increasing the area of a saltern.

The invention relates to an integrated domestic sewage treatment ecosystem box, which comprises a sewage collecting tank, an anaerobic regulating tank, an aerobiotic reaction tank, a water reusing tank and an artificial wetland. The sewage flows through the sewage collecting tank, the anaerobic regulating tank and the aerobiotic reaction tank in sequence and then enters into the artificial wetland, therefore, the sewage collection can be realized, and the anaerobic and aerobiotic degradation combines with the ecological engineering technology, to reach the purposes of sewage purification and ecological landscape reusing. The ecosystem box is divided into two layers of an upper layer and a lower layer, wherein the lower layer is divided into the sewage collecting tank, the anaerobic regulating tank and the aerobiotic reaction tank, to realize the functions of sludge collection, ozone elimination and sewage purification; the artificial wetland tank and the water reusing tank are arranged on the upper layer to realize the function that the sewage is reused into the ecological landscape.

The invention relates to an ecological engineering technology for stopping riverway coastal pollutants from entering rivers and restoring vegetation communities. The ecological engineering technology consists of four basic unit systems, namely a land pollutant stopping and purification system, a slope protection system, a base construction system and a plant cultivation system; the units consist of physical materials and plants, wherein the pollutant stopping and purification system is built by materials such as plastic, woods, gravels, plants and the like; the slope protection system is built by materials such as woods or concrete, stone blocks, metal wires and the like; the base construction system is built by materials such as plastic, woods, soils, gravels, metal wires and the like; and the plant cultivation system consists of materials such as plants, plastic, soils and the like. The ecological engineering technology aims at land directional runoff pollution and side slope ecological structure construction of rural or urban suburban riverways, and has the advantages of fully and effectively collecting, detaining and purifying the land directional runoff pollution, particularly the runoff pollution of initial rain water, reducing the total amount of pollutants entering the riverway and realizing effective control on the riverway pollution; meanwhile, by the ecological engineering technology, a physical structure and a biologic structure of the riverway from the land direction to the water direction can be stabilized and perfected by building and restoring revetments and bases of the riverway, so a healthy, stable and developed riverway side slope biologic system is formed at last.

The invention discloses a high-strength high-elasticity intravascular stent and a preparation method thereof and belongs to the field of chemical and ecological engineering. The high-strength high-elasticity intravascular stent has the advantages that a biocompatible polymer material is taken as a precursor; firstly, an electrostatic spinning method is adopted for preparing fibrous membranes with different mechanical properties; and on this basis, an electrospinning technology and a solution soaking and removing method are combined for preparing a high-strength, high-elasticity and high-porosity artificial intravascular stent, fibers used for forming the artificial intravascular stent are smooth in surface, uniform in morphology, narrow in fiber diameter distribution range, and excellent in vascular performance. The obtained artificial intravascular stent with high cell compatibility, strength, elasticity and porosity can be produced in a large scale and is expected to be applied to the actual clinical diagnosis.

The invention discloses a silt retaining and consolidating method for use in debris flow gully ecological engineering and use thereof. The method comprises: planting a plurality of brush woods for increasing the roughness of the gully bed in a silt transfer area between a debris flow flowing area and a silt settling area in the gully; planting bank-protecting and scouring-preventing forest at the foot of a slope of the gully along the bank of the gully for preventing flowing water from scouring the silt on the bank of the gully; and planting arbor and bush combined improved protection forest in the silt settling area to improve the impact strength of soil body. When the method is used, the use of other civil engineering measures in combination is determined according to the occurrence frequency of debris flow. Compared with the prior art, the method can effectively retain, consolidate and improve the silt in the silt transfer area, on the gully slope and in the silt settling area in the debris flow gully, consolidate and improve retained and deposited silt while reducing silt sources, improve the self-stability of the silt soil body in the silt settling area, strengthen the sand control capability of the gully and improve the landscape of the gully.

The invention provides a diagnosis and evaluation method for the water quality of an eutrophic shallow lake subjected to ecological restoration, which comprises the following steps of: selecting two factors, i.e. water transparency and chlorophyll a concentration which are important for water-quality improvement and stabilization in the ecological restoration process of the eutrophic shallow lake, comprehensively considering the interaction between the two factors, and establishing a water-quality diagnosis index-lake water quality index (LQI) of the eutrophic shallow lake subjected to the ecological restoration. The LQI can be used for quantitatively describing the conversion between the clean-water steady state and the muddy-water steady state of the eutrophic shallow lake so as to provide a visual and convenient diagnosis method for the water quality of the eutrophic shallow lake subjected to ecological restoration and also provide a scientific and reasonable reference basis for the drafting of management measures of the eutrophic shallow lake subjected to ecological restoration and the selection and the application of a subsequent ecological engineering method.

The invention relates to an ecological engineering technology for disposing river or lake bottom mud on site to construct an ecological revetment. River or lake bottom mud in the urban region and particle components are filled into ecological bags to be used for constructing the ecological embankment on a cement hardened river or lake bank, mixtures of bottom mud and other components are filled between the ecological bags and the original bank zone, then, plants such as bushwood and sedge with high purifying capacity are planted, and thus a system for disposing bottom mud on site is constructed. With the method, river or lake bottom mud suffering urban pollution is disposed on site, transportation cost is reduced, influences on the environment are reduced, and the bottom mud is disposed in an ecological harmless mode and recycled through a constructed compound system of bottom mud matrixes, plants and microorganisms. The formed near natural plant ecological zone can intercept and absorb surface source pollutants carried into a river or lake by surface runoffs, and pollution level is reduced.

The invention provides a saline-alkali soil conditioner as well as preparation and an application thereof and belongs to the technical field of ecological engineering. The saline-alkali soil conditioner comprises a main material and an auxiliary material, wherein the main material comprises sludge, humus and / or farmyard manure; the auxiliary material comprises a compound microbial agent; the compound microbial agent comprises one or more of following strains: anaerobic lactic acid bacteria, aerobic yeast, aerobic Gram-positive actinomycetes, anaerobic fermentation filamentous bacterium floras, bacillus, nitrogen-fixing bacteria, phosphate solubilizing bacteria and potassium bacteria. The invention further provides a preparation method of the saline-alkali soil conditioner, a saline-alkali soil conditioning method based on the saline-alkali soil conditioner and a compound microbial agent for saline-alkali soil conditioning. Dual purposes of ecological disposal of the sludge and long-acting conditioning of saline-alkali soil can be achieved with the adoption of the saline-alkali soil conditioner and conditioning method.

The invention relates to an anti-microbial and anti-corrosion concrete material for marine ecological engineering. The concrete material comprises a concrete base material, a fiber-reinforced lining material and a dispersing agent, wherein the adding mass of the fiber-reinforced lining material is 2-3% of the volume of the concrete base material; the adding mass of the dispersing agent is 0.4-0.6% of the volume of the concrete base material; each one cubic meter of the concrete base material is processed by the following raw materials based on weight: 300-400kg of silicate cement, 600-800kg of desalted sea sand, 800-1,000kg of detritus, 3-5kg of inorganic antibacterial agent, 1.2-4kg of concrete water reducing agent and a proper amount of water. Compared with conventional concrete material, the concrete material disclosed by the invention has the beneficial effects as follows: 1, the desalted sea sand is wide in source, convenient to get, and is wetted or washed by sea water naturally, so that the desalted sea sand has excellent sea water corrosion resistance compared with river sand or other dinas; 2, the fiber-reinforced lining material has high toughness, so that it is equivalent that multiple micro reinforcing ribs are added in the concrete material, and the strength of the concrete material is greatly improved consequently; and 3, the concrete material is excellent in the anti-microbial property, and the service life of the concrete material is greatly prolonged.

The present invention belongs to the field of ecological engineering technology, and provides a method for controlling breeding potential of adventitious species huhuami waterweed. Said method can overcome all the defects or existent control methods and can obtain the optimization and unification of economic benefits, ecological benefits and social benefits.

The present invention belongs to saline and alkaline land reconstruction, and relates to the ecological engineering method of fast constructing vegetation in bare saline and alkaline land. The method includes timely constructing ridges, timely harrowing, rotary tillage, seeding perennial pasture and other processes. The present invention makes it possible to fast grow annual plant in the bare land and utilize the annual plant matter in improving the physical and chemical properties of the soil surface layer so as to grow perennial pasture. The present invention can increase grassland coverage fast, reduce harm of the bare saline and alkaline land on nearby farm field and grassland, improve ecological environment and utilize the saline and alkaline land to provide pasture.