CN108848732A - A kind of desert original position microorganism film coating technique and its green ecological administering method for combining salix monogolica - Google Patents

Abstract

The invention discloses an in-situ microbial coating technology for deserts and a green ecological treatment method combined with salix salix, which comprises the steps of: dividing the desert area to be treated into regions, dividing the desert area to be treated into multiple vegetation planting areas and Multiple microbial-coated sandy soil areas; activate the seeds of the desert-derived fungus CGMCC No.15633, and expand the cultivation step by step; spray the desert-derived bio-cementing agent in multiple microbial-coated sandy areas, and each microbial-coated sandy area Under the action of the desert's self-derived biological cement, a microbial coating layer is formed to fix the surface sand in the desert area to be controlled; in the multiple vegetation planting areas, a plurality of salix willows are respectively planted, and each vegetation planting area is in a corresponding The vegetation layer is formed under the action of Salix salix, and the lower sand layer of the desert area to be controlled is fixed. The invention can cover the desert soil in situ, prevent foreign organisms from invading, suppressing and crowding out local organisms, and truly achieve the purpose of sand control.

Description

A desert in-situ microbial mulching technology and its green ecological management combined with Salix salix method

technical field

The invention relates to a green ecological management method of deserts, in particular to a desert in-situ microbial coating technology and a green ecological management method combined with Salix salix.

Background technique

The desertification and erosion caused by wind and sand all over the world have caused the reduction of organisms and the destruction of the environment, directly or indirectly causing major economic losses and serious ecological problems to the country and society. Therefore, all countries have invested a lot of manpower and material resources in the field of windbreak and sand fixation, with the purpose of innovating the desert governance mechanism, which has received good results. The management of deserts can not only improve the ecological environment and agricultural and animal husbandry production conditions, but more importantly, it is also of great significance to promote economic structural adjustment and social progress.

Desert aeolian soil is a special soil developed on the parent material of aeolian sand, with fine particles, good roundness, no cohesion between particles, loose, easy to flow, and easy to wind erosion. Many scholars at home and abroad have conducted in-depth research on desertification control and governance issues, and achieved good results. For example, through the study of the interaction mechanism among atmospheric nitrogen deposition, microbial colonies and desert vegetation, we sought ways to promote desert vegetation. It was found that the increase in nitrogen deposition will increase the nutrients in the desert and enrich the microorganisms, which is conducive to the growth of vegetation. growth, based on the desert landscape to establish a conceptual model to study the geomorphic control on the distribution of biological soil crusts, etc. The patent application with the publication number CN106717226A discloses a method for desert greening by using a straw blanket, which is used to control the desert. There are grass seeds, tree species, flower seeds, vegetable seeds, etc. in the straw blanket, and they are mixed. The seeds take root and germinate, which can improve the greening and ecology of the desert. The patent application with publication number CN206118663U discloses a kind of sandy land plant ecological management and its device, including a ring, the outside of which is connected with water-collecting blades, simple in structure, easy to operate, made of degradable plastic, and the degraded Plastic can also provide nutrients for plants. The device is easy to install and will not be blown away by the wind. It can also be maintained on the surface of the sand when the flow of the sand body is not large, and it is not easy to damage. It is worth promoting. The management mode in the above invention is to carry out vegetation protection. The work of vegetation protection is reflected in the selection of plant species. The disadvantage is that it completely depends on the package of plant roots. Because of desert climate conditions, it is difficult for green vegetation to survive. Even if it survives, it can only be used. Mobile sand dunes become semi-fixed dunes, which fail to fundamentally cut off the source of sand and dust. At the same time, plant sand fixation will cause the wind direction of the natural wind field to change, and the disturbed wind field will re-transport and re-transport sand and dust in the area where the wind speed decreases. accumulation.

The use of chemical reinforcement is also a commonly used control measure in desert engineering. The patent application with publication number CN 101548595 B discloses a desert control method based on chemical sand-fixing greening technology based on organic composite materials. On the sand or soil layer where greening materials are sown, spray Hydrophilic polyurethane resin curing agent solution forms a porous solidified sand layer. In the desert-specific environment without abundant groundwater sources and strong wind erosion, it can solidify the sand stably and effectively, realize the function of plant greening and protect the desertified land. Ecological restoration and governance. The patent application of publication number CN106348872A discloses soil control fertilizer for improving desertified soil quality and preparation method thereof, and using the prepared soil control fertilizer for improving sandy soil quality can effectively improve soil fertility and reduce the degree of desertification. However, the use of chemical building materials for grouting to reinforce the soil will cause serious water and soil pollution and cause adverse effects on the environment.

Organic matter composite materials are also a means of sand control. The patent application with publication number CN106358482A discloses a method for controlling deserts and sandy lands. Water and solid organic matter can be sprinkled on the surface of deserts or sandy lands in any order by manpower or machinery. , or directly sprinkle a cohesive and adhesive solution formed by solid organic substances, use a stirring device to sprinkle the solution formed by solid organic substances or sprinkle solid organic substances and sprinkle sand on the surface of deserts and sandy land Mix well to modify the sand bodies on the surface of deserts and sandy lands. However, the degradation products have certain toxic and side effects, which will bring harm to the surrounding ecology. The patent application with the publication number CN106947492A discloses a composite sand-fixing model and its preparation method and application. By first spraying fiber filaments on the field, and then spraying the biological reinforcement liquid on the surface, the microbial reinforcement liquid will harden on the surface and inside of the sand, combined with Fiber filaments together form a reinforced structure, which overcomes the shortcomings of the original microbial sand fixation method, such as high surface brittleness, poor durability, and easy wind erosion. Engineering, leading to the decline and disappearance of the original biological community, may cause irreversible pollution to the environment.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention proposes a kind of desert in-situ microbial coating technology and its green ecological management method combined with Salix salix. Use the self-sourced bacterial strains screened from the desert in the area to be treated to cover the desert soil in situ to prevent the invasion of foreign organisms from suppressing and crowding out local organisms, and truly achieve the purpose of sand control. On the basis of this technology, combined with the plant Salix salix, which is resistant to drought, wind erosion, sand burial, rapid growth, well-developed rhizomes, windbreak and sand fixation, and water and soil maintenance, to fix the sand under the microbial film layer, providing a good green governance linkage for desert governance structure.

The present invention adopts the following technical schemes to realize: a kind of desert in-situ microbial coating technology and its green ecological management method combined with Salix salix, which comprises the steps of:

Step 1: the desert area to be treated is divided into regions, and the desert area to be controlled is divided into a plurality of vegetation planting areas and a plurality of microorganism-coated sandy soil areas;

Step 2: activate the seeds of desert self-derived bacteria CGMCC No.15633, and expand the cultivation step by step;

Step 3: On the basis of step 1, the desert self-sourced bio-cementing agent is sprayed in a plurality of the microbial-coated sandy soil areas, and each microbial-coated sandy soil area forms a microbial coating under the action of the desert self-sourced bio-cementing agent. The film layer fixes the surface sand in the desert area to be controlled;

The desert self-sourced bio-cementing agent includes desert self-sourced bacterial liquid, cementing nutrient solution and cementing particles; the desert self-sourced bacterial liquid is formed by expanding the desert self-sourced bacteria in step 2; the cementing nutrient solution is made of CO (NH ₂ ) ₂ , CaCl ₂ .2H ₂ O; the main component of the cemented particles is a degradable high-molecular water-absorbing polymer;

Step 4: plant a plurality of Salix salix in described a plurality of vegetation planting areas respectively, each vegetation planting area forms vegetation layer under the action of corresponding Salix salix, fixes the lower sand layer of described desert area to be controlled.

As a further improvement of the above-mentioned scheme, a plurality of the microorganism-coated sandy soil areas and a plurality of the vegetation planting areas are interlacedly distributed.

Further, a plurality of said microorganism-coated sand areas are arranged in an array, and the four corners of each microorganism-coated sand area are respectively arranged with a said vegetation planting area.

As a further improvement of the above scheme, the cemented particles are evenly sprayed into the microorganism-coated sand area at 50-70 grams per square meter; 5-6 liters of desert self-source Bacteria solution, 12-15 liters of the cemented nutrient solution.

As a further improvement of the above scheme, the day after the day of spraying the cemented granules is regarded as the first day, and on the first day, the desert-derived bacterial solution and the cemented nutrient solution are in a volume ratio of 1:2.5 The proportion of spraying alternately, the alternating sequence is to spray the desert self-sourced bacterium liquid first, then spray the cementing nutrient solution, and alternately carry out successively; 1 hour; on the second, third, and fourth day, spray the same volume of cementing nutrient solution as the first day.

Further, within 4 hours of the first day, the desert self-derived bacterial solution and the cemented nutrient solution were sprayed twice each.

Further, the spraying process of the cemented particles, the preparation process and the spraying process of the two liquids of the desert self-sourced bacterial liquid and the cemented nutrient solution are respectively completed by different sprinkler irrigation equipment.

As a further improvement of the above scheme, in step 2: activate the seeds of desert autogenous bacteria CGMCC No.15633, and then insert them into shake flasks, seed tanks and fermenters for gradual expansion.

As a further improvement of the above scheme, the desert self-sourced bacteria solution is composed of the desert self-sourced bacteria after expansion and centrifugation and adding fresh medium, and the fresh medium is composed of yeast powder 20 grams per liter, 0.1 ~ 1mol NaCl , 0.05 ~ 1mol NH ₄ Cl, 0.1 ~ 1mol CO (NH ₂ ) ₂ material composition.

As a further improvement of the above solution, the cementing nutrient solution is composed of 0.4mol˜1mol CO(NH ₂ ) ₂ , 0.25mol˜0.5mol CaCl ₂ .2H ₂ O substances.

The advantages of the present invention are:

1. Use the desert-derived microorganisms screened from the soil of the desert area to be treated (that is, the desert-derived bacteria CGMCCNo.15633) to fix the surface layer of the desert area to be treated to form a microbial film with stable performance, high strength, and strong water retention. Fundamentally block the source of sand and dust, and at the same time, the use of self-sourced microorganisms reduces the impact of foreign microorganisms on the treatment of desert areas, and realizes the application of in-situ microbial coating technology for desert control in desert green ecological management;

2. Use desert microorganisms to fix the desert surface sand and add degradable cementing particles to form a microbial coating layer that has good water permeability and air permeability, and can penetrate atmospheric water vapor or rainwater into the lower sand layer to provide plant roots in the planting area. Sufficient moisture nourishment greatly improves the survival rate of vegetation;

3. The microorganisms in the desert area to be treated fix the desert surface sand, and the vegetation root system fixes the desert bottom sand. The combination of the two is to combine the green microbial technology with the desert ecological environment on the basis of not destroying the original sand ecological self-balancing system. The perfect combination is the original technological innovation in the green governance and restoration of the desert ecosystem.

Description of drawings

Fig. 1 is the schematic diagram after the region segmentation of the desert area to be controlled;

Figure 2 is the desert control effect diagram of in-situ microbial mulching technology and its combination with salix salix for green ecological control of desert;

Fig. 3 is the fixed desert topsoil of microbial film layer, and the schematic diagram of plant fixed desert bottom soil structure;

Fig. 4 is the trend chart of the test results of the penetration resistance of microbial fixed sand layer by adopting the method provided by the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

The green ecological management method of the desert in-situ microbial film covering technology and its combination Salix salix of the present embodiment comprises the following steps.

Step 1: The desert area to be treated is divided into regions, and the desert area to be treated is divided into multiple vegetation planting areas and multiple microbial-coated sandy soil areas.

A plurality of said microorganism-coated sand areas and a plurality of said vegetation planting areas are preferably interlaced with each other, preferably an array layout of a plurality of said microorganism-coated sand areas, and the four corners of each microbial-coated sand area are arranged respectively One said vegetation planting area. In addition, a plurality of the microorganism-coated sandy soil areas and a plurality of the vegetation planting areas are interlacedly distributed, which can also meet the needs of local desert landscape design.

Step 2: activate the seeds of the desert self-derived fungus CGMCC No.15633, and expand the cultivation step by step.

In this example, the seeds of the desert self-derived bacterium CGMCC No.15633 were activated, and then inserted into shake flasks, seed tanks and fermenters for gradual expansion. The bacteria are self-derived microorganisms with cementation and solidification effects, and the extraction of self-derived microorganisms prevents the rapid reproduction of the bacterial flora after the invasion of foreign organisms into a suitable growth area, resulting in damage to the local ecological security. The strain gy1# was deposited on April 18, 2018 in the General Microorganism Center of the China Committee for Culture Collection of Microorganisms (CGMCC for short), and the registration number of the deposit center is CGMCC No.15633. The bacterium is Staphylococcus sp.

Step 3: On the basis of step 1, the desert self-sourced bio-cementing agent is sprayed in a plurality of the microbial-coated sandy soil areas, and each microbial-coated sandy soil area forms a microbial coating under the action of the desert self-sourced bio-cementing agent. The film layer fixes the sand on the surface of the desert area to be controlled.

The desert-derived bio-cementing agent includes desert-derived bacterial liquid, cementing nutrient solution and cementing particles. The desert self-sourced bacteria liquid is formed by expanding the desert self-sourced bacteria in step 2. For example, the desert self-sourced bacteria liquid is composed of the desert self-sourced bacteria after expansion and centrifugation and adding fresh medium. The fresh medium is composed of 20 g/liter of yeast powder, 0.1-1 mol of NaCl, 0.05-1 mol of NH ₄ Cl, and 0.1-1 mol of CO(NH ₂ ) ₂ . ; The cemented nutrient solution is composed of CO(NH ₂ ) ₂ , CaCl ₂ .2H ₂ O substances, for example, the cemented nutrient solution is composed of 0.4mol～1molCO(NH ₂ ) ₂ , 0.25mol～0.5molCaCl ₂ .2H ₂ O material composition. The main component of the cemented particles is a degradable high-molecular water-absorbing polymer, which is evenly sprayed into the soil of the microbial desert control area.

Taking the day after the spraying day of the cemented granules as the first day, on the first day, the self-sourced bacterial solution and the cemented nutrient solution are alternately sprayed with a volume ratio of 1:2.5, and the specific alternating sequence is to spray first The self-sourced bacterial solution is then sprayed with the cementing nutrient solution alternately, and the interval between the alternate spraying of the self-sourced bacterial solution and the cemented nutrient solution is 1 hour. On the second, third, and fourth days, the same volume of cementing nutrient solution as that on the first day was sprayed each day. The spraying of the cementing particles and the preparation process and the spraying process of the two cementing liquids are respectively completed by different sprinkling equipment.

In the implementation process, the cemented particles are evenly sprayed into the microorganism-coated sand area at 50-70 grams per square meter; 5-6 liters of desert self-sourced bacterial liquid are sprayed on one square meter of the microorganism-coated sand area , 12-15 liters of the cementing nutrient solution. Taking the day after the spraying day of the cemented particles as the first day, on the first day, the desert self-sourced bacterial solution and the cemented nutrient solution are alternately sprayed with a volume ratio of 1:2.5, which The alternating sequence is to spray the desert self-sourced bacterial solution first, and then spray the cemented nutrient solution, which are carried out alternately; the interval between the alternate spraying of the desert self-sourced bacterial solution and the cemented nutrient solution is 1 hour; second, On the third and fourth day, the same volume of cementing nutrient solution as that on the first day was sprayed each day. In 4 hours on the first day, spray desert self-source bacterial liquid and cementing nutrient solution respectively 2 times altogether. The spraying process of the cemented granules, the preparation process and the spraying process of the two liquids, the desert-derived bacteria liquid and the cemented nutrient solution, are respectively completed by different sprinkler irrigation equipment.

The thickness of the microbial coating layer can be adjusted according to the environment and the goal of governance.

Step 4: plant a plurality of Salix salix in described a plurality of vegetation planting areas respectively, each vegetation planting area forms vegetation layer under the action of corresponding Salix salix, fixes the lower sand layer of described desert area to be controlled.

Salix salix is one of the few plants that can grow in saline-alkali land. Its branches are not afraid of sand pressure, have strong germination power, and a well-developed root system. It is a material characteristic that fixes sand without destroying or polluting the sand itself. It can also fix sand loss and stabilize water systems. Plants of choice. As for the density of the vegetation layer, it can be adjusted according to the environment and the goal of governance.

Through a kind of desert in-situ microbial coating technology and its green ecological management method combined with Salix salix provided by the present invention, the desert area to be treated is divided into multiple vegetation planting areas and multiple microbial coating sandy soil areas, and the microbial coating The sandy soil area forms a microbial coating layer under the action of the desert's self-sourced biological cement, and fixes the surface sand in the desert area to be controlled. The vegetation planting area forms a vegetation layer under the action of Salix salix, and fixes the lower part of the desert area to be treated. The sandy soil layer, the combination of the two, realizes the comprehensive management of the desert area to be treated.

Example 2

Some microorganisms in nature can induce calcium carbonate in the process of metabolism, and can cement loose sandy soil into a new green artificial material with certain strength and good permeability.

Since desert soil is a good carrier of microorganisms, using the characteristics of microorganisms that can grow, migrate and reproduce in porous media, isolate the self-sourced bacteria with fixation and bonding effects in the desert, and generate a desert microbial coating layer to fix the surface sand. The mobile sand dunes become semi-fixed and fixed dunes after being covered with a fixed film, fundamentally blocking the source of sandstorms. The microbial coating layer has the characteristics of affinity with the rock-soil matrix, good air permeability and water retention, making it a "breathing natural barrier" in desert ecological management. Further, select drought-tolerant and barren-tolerant plants for planting and realize their optimal allocation, realize the interdependence and mutual support between the in-situ microbial film layer and the sandy green plants, and jointly build a new pattern of the sandy desert ecosystem.

Based on the above analysis, the present invention provides a kind of desert in-situ microbial coating technology and its green ecological management method combined with Salix salix, comprising the following steps.

Step 1: The desert area to be treated is divided into regions, and the desert area to be controlled is divided into a plurality of vegetation planting areas 2 and a plurality of microbial film-coated sandy soil areas 1.

As shown in Fig. 1, a plurality of said microorganism-coated sandy soil areas 1 and a plurality of said vegetation planting areas 2 are interlacedly distributed. A plurality of said microorganism-coated sandy soil areas are arranged in an array, and in an area whose length and width are 10,000 meters, a plurality of said microbial-coated sandy soil areas 1 of an array type are set every 2,000 meters in length and width. The four corners of the membrane sandy soil area 1 are respectively arranged with a vegetation planting area 2, and the diameter of the vegetation planting area 2 is 300 meters.

Step 2: The desert self-derived bacterium (CGMCC No.15633) seeds are activated, and inserted into shake flasks and tanks to expand cultivation step by step.

Step 3: Spray desert self-sourced green bio-cementing agent in all the microbial coating areas 1 to form a certain thickness of microbial coating layer 4. The desert self-sourced bio-cementing agent includes desert self-sourced bacterial liquid, cementing nutrients liquid and cemented particles.

Spray degradable cementing particles in the microbial film-covered area 1, in order to make the fixed layer in the sandy soil area fixed by the microorganisms have good strength, plasticity and permeability, the cementing particles are evenly sprayed into all the areas to be treated with 50-70 grams per square meter. In controlling the soil in the sandy soil area covered by microorganisms, the main component of the cemented particles is a degradable high molecular water-absorbing polymer.

The water-retaining agent, that is, the day after the spraying day of the cemented granules is regarded as the first day, and on the first day, the self-sourced bacterial solution and the cemented nutrient solution are alternately sprayed at a volume ratio of 1:2.5, specifically one Spray 5-6 liters of self-sourced bacterial solution and 12-15 liters of cemented nutrient solution in the microbial solidification area of square meters. The interval between the alternate spraying of the bacterial solution and the cementing nutrient solution is 1 hour, that is, the cementing nutrient solution is sprayed one hour after the self-sourced bacterial solution is sprayed, the self-sourced bacterial solution is sprayed after another hour, and the cemented nutrient solution is sprayed after another hour. Spray the self-sourced bacterial solution and the cemented nutrient solution twice each within 4 hours on the first day. On the second, third, and fourth days, the same volume of cementing nutrient solution as that on the first day was sprayed every day. The preparation process and spraying process of the cemented granules, the self-sourced bacterial solution and the cemented nutrient solution are respectively completed by different sprinkler irrigation equipment.

The self-sourced bacteria liquid is composed of desert self-sourced microorganisms after expansion and centrifugation and adding fresh medium. The fresh medium consists of yeast powder 20 g/liter, 0.1-1molNaCl, _{0.05-1molNH4Cl} , 0.1-1molNH4Cl, 1molCO(NH ₂ ) ₂ material composition. The cementing nutrient solution is composed of 0.4mol-1mol CO(NH ₂ ) ₂ , 0.25mol-0.5mol CaCl ₂ .2H ₂ O substances.

Step 4: Plant Salix salix in all described vegetation planting areas 2 respectively, form the vegetation layer 3 of certain density respectively. Apply base fertilizer to all Salix salix according to the species and quantity of Salix salix to supply the required nutrients throughout the growth cycle of Salix salix.

The described Salix species selects drought-resistant, wind-erosion-resistant, sand-buried, rapid-growing, wind-proof and sand-fixing, water and soil maintenance effects, 1 to 3 years old without pests and diseases, small head diameter ≥ 0.7cm robust growth Salix branches, in spring Carry out cuttage, cuttage adopts the configuration mode of plant row spacing 2m * 2m (about 222 plants/acre), all described Salix salix branches before cuttingtage use ABT rooting powder solution to carry out pretreatment, carry out before the end of June every year respectively within 2 years after cuttingtage One-time fertilization, the fertilization includes applying organic fertilizer poultry or livestock manure for all Salix salix, and simultaneously applying nitrogen, phosphorus, and potassium fertilizers. The amount of organic fertilizers is 1.5-3kg/plant; nitrogen, phosphorus, and potassium fertilizers are 0.2-0.3kg/plant .

Salix salix in all vegetation planting areas 2 grows to form a vegetation layer with reasonable density, and the vegetation layer 3 is used to fix the underground soil layer in the desert area to be controlled, i.e. the sand layer 6, to achieve the effect of plant-fixed sand dunes.

All described vegetation layers 3 work together with all microbial coating layers 4 to fix the desert area to be controlled, as shown in Figures 2 and 3.

The penetrometer test is carried out on the desert film layer treated by the above-mentioned desert in-situ microbial film technology and the green ecological management method combined with Salix salix; the penetrometer detects the strength of the microbial film sand layer, that is, the microbial film layer 4 , in order to reduce the impact of the detection on the film coating effect, the detection process starts from the fourth day of spraying the desert green bio-cement and ends on the seventh day. Figure 4 is the scatter diagram and trend diagram of the penetration resistance test results of the penetration test, respectively.

Use a penetrating rod with a length of 10 cm, press down on the penetrometer at a constant speed during detection, and record the readings of the penetrometer at each centimeter of the penetrating rod. The penetration speed is generally 1-1.5cm/s, and the penetration resistance should not be less than 17N. On-site test results show that when the microorganism-coated sandy soil area is tested on the fifth day, the penetration resistance of the microbial-coated area reaches 17N, and when the microbial-coated area is tested on the seventh day, the microbial The penetration resistance in the film-covered sandy soil area reaches 47N.

Judgment of test results: When the penetration resistance of the microbial coating sand layer reaches 14-17N, it is considered that the strength of the in-situ microbial coating layer in the desert meets the requirements for use.

As shown in Figures 2 and 3, through the desert in-situ microbial coating technology provided by the present invention and the green ecological treatment method combined with salix salix, the degradable cemented particles are evenly sprayed in the desert area to be treated, and the cemented particles have high Water retention capacity, the absorbed liquid is not squeezed out by simple physical methods, and can repeatedly release liquid and absorb liquid to form a "miniature reservoir", improve the liquid retention capacity of desert biological coatings and plant planting areas, and improve the brittleness of desert coating materials Disadvantages; the desert area to be treated is divided into multiple vegetation planting areas and multiple microbial-coated sandy soil areas. The layer can fundamentally block the source of sand and dust and realize the ecological management of the desert. In addition, the in-situ microbial coating layer formed by the desert's own source microorganisms extracted from the soil of the desert area to be treated is used to fix the desert area to be treated. Achieve sand control with sand, reduce the adverse effects of alien biological species on the treatment of desert areas as much as possible; the vegetation planting area forms a vegetation layer 3 under the action of Salix salix, and the developed root system 5 of Salix salix fixes the desert to be treated The underground soil layer in the area is the sand layer 6, the microbial coating layer 4 and the vegetation layer 3 are interdependent and rely on each other, and jointly build a new pattern of the desert ecosystem. The combination of the two realizes the comprehensive fixation of the desert area to be treated. Through the penetrometer test on the in-situ microbial coating layer, the test results show that using the method proposed in the present invention, the microbial coating layer 4 has a stable effect and its strength meets the requirements for use.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A kind of desert in-situ microbial mulching technology and the green ecological management method of joint Salix salix, it is characterized in that, it comprises steps: Step 1: Carry out regional segmentation of the desert area to be treated, and divide the desert area to be divided into multiple vegetation planting areas and multiple microbial-coated sandy soil areas; Step 2: activate the seeds of desert self-derived bacteria CGMCC No.15633, and expand the cultivation step by step; Step 3: On the basis of step 1, the desert self-sourced bio-cementing agent is sprayed in a plurality of the microbial-coated sandy soil areas, and each microbial-coated sandy soil area forms a microbial coating under the action of the desert self-sourced bio-cementing agent. The film layer fixes the surface sand in the desert area to be controlled; The desert self-sourced biological cement includes desert self-sourced bacterial liquid, cementing nutrient solution and cementing particles; the desert self-sourced bacterial liquid is formed by expanding the desert self-sourced bacteria in step 2; the cementing nutrient solution is made of CO (NH ₂ ) ₂ , CaCl ₂ .2H ₂ O; the main component of the cemented particles is a degradable high molecular water-absorbing polymer; Step 4: plant a plurality of Salix salix trees in the plurality of vegetation planting areas, each vegetation planting area forms a vegetation layer under the action of the corresponding Salix salix, and fixes the lower sand layer of the desert area to be controlled. 2. The green ecological management method of desert in-situ microbial coating technology and its combination Salix salix as claimed in claim 1, it is characterized in that a plurality of said microbial coating sandy soil areas and a plurality of said vegetation planting areas are interlaced distributed. 3. The desert in-situ microbial film coating technology and its green ecological management method in conjunction with Salix Salix as claimed in claim 2, is characterized in that, a plurality of said microbial film-covered sandy soil areas are arranged in an array, and each microbial film-covered sandy soil The four corners of the area are respectively arranged with a vegetation planting area. 4. The desert in-situ microbial coating technology and the green ecological management method of Salix Salix as claimed in claim 1, wherein the cemented particles are evenly sprayed into the microbial coating with 50-70 grams per square meter. In the filmed sandy soil area: 5-6 liters of desert self-sourced bacteria solution and 12-15 liters of the cementing nutrient solution are sprayed on one square meter of the microorganism-coated sandy soil area. 5. as claimed in claim 1 or 4 described desert in situ microbial coating technology and the green ecological management method of joint salix salix, it is characterized in that, the first day is the day after the spraying day of the cemented particles, in On the first day, the desert self-sourced bacterial solution and the cemented nutrient solution were alternately sprayed at a volume ratio of 1:2.5, and the alternating sequence was to spray the desert self-sourced bacterial solution first, and then spray the The cementing nutrient solution is carried out alternately in sequence; the interval between the alternate spraying of the desert self-sourced bacterial solution and the cementing nutrient solution is 1 hour; the second, third, and fourth days are sprayed with the same volume of cementing nutrition as the first day. liquid. 6. The desert in-situ microbial mulching technology and its green ecological management method in conjunction with Salix Salix as claimed in claim 5, characterized in that, within 4 hours of the first day, the desert self-sourced bacterial liquid and cementing nutrients were sprayed altogether 2 times each. 7. The green ecological management method of desert in-situ microbial coating technology and joint salix salix as claimed in claim 5, characterized in that, the spraying process of the cemented particles, the desert self-sourced bacterial liquid and the cemented The preparation process and spraying process of the two liquids of the nutrient solution are respectively completed by different sprinkler irrigation equipment. 8. The desert in-situ microbial mulching technology and its green ecological management method in combination with Salix Salix as claimed in claim 1, characterized in that, in step 2: activate the desert self-derived bacteria CGMCC No.15633 seeds, and then inoculate Put into shake flasks, seed tanks and fermenters to expand cultivation step by step. 9. The desert in-situ microbial film coating technology and its green ecological management method in combination with Salix salix as claimed in claim 1, wherein the desert self-sourced bacterial liquid is expanded and centrifuged by the desert self-sourced bacteria Afterwards, fresh medium is added, and the fresh medium is composed of 20 g/liter of yeast powder, 0.1-1mol NaCl, 0.05-1mol NH ₄ Cl, and 0.1-1mol CO(NH ₂ ) ₂ . 10. The desert in-situ microbial mulching technology and its green ecological treatment method combined with Salix Salix as claimed in claim 1, characterized in that the cemented nutrient solution consists of 0.4mol～1mol CO(NH ₂ ) ₂ , 0.25mol～ 0.5molCaCl ₂ .2H ₂ O substance composition.