Desertification control method and quicksand stabilization method

Abstract

Summary of the invention: Method for controlling desert or sand. Spraying water and spreading organic solids is done manually or mechanically on the surface of the desert or sand in any direction, or a cohesive and adhesive solution consisting of organic solids is sprayed directly. A sand body on the surface of the desert or sand is sprayed with a solution formed by organic solids or is spread with organic solids and sprayed with water and uniformly stirred using a stirring device, so that the sand body on the surface layer of the desert or sand is modified into a modified sand body. The control method can be directly placed on the desert or sand required for control, and the sand body modified by the mixer does not need to be separately flexible, so that a lot of construction costs are saved and construction efficiency is improved. In addition, the process of mixing the surface layer of the desert or sand can also be used as an agricultural process on the surface layer of the desert or sand that has changed into soil, in order to facilitate the subsequent seeding operation on the controlled desert or sand.

Description

Desertification control method and quicksand stabilization method Cross-reference to relevant statements

[0001] This application claims priority to Chinese Patent Application No. 201610725079.3, filed on August 25, 2016, the disclosure of which is incorporated herein by reference. Field of invention

[0002] This invention relates to a method for treating sand or sandy soil in deserts and desert lands. History of the invention

[0003] Desertification and desertification are currently one of the most serious environmental problems on Earth. Desertification leads to the "destruction" or "blockage" of soil, turning it into a "desert" or "sandy land" or "sandy soil" surrounded by sand (sandy soil also includes other natural types, especially sand-based soil types). The dangers of desertification and blockage include the covering of land by moving sand dunes, the blockage of rivers, reservoirs, water channels and roads, etc., as well as the destruction of entire ecosystems, the loss of land resources, regional economic problems caused by the combination, and also socio-economic problems such as social instability. The rapid expansion of desertification and desertification is related to the more volatile of land resources. They lead to the destruction of naturally fertile soil, damage to soil structure, and cause the loss of soil nutrients. However, it usually takes tens, hundreds, or even thousands of years for soil to naturally improve its fertility. If existing methods are used to restore soil fertility, the amount of input required is large and difficult to calculate.

[0004] In general, desertification and desertification control methods are often divided into three types: engineering (mechanical) method, vegetation method and chemical method. Engineering and vegetation methods aim to reduce wind speed and thus reduce the speed of sand movement, while chemical method is used to control the process of wind erosion on the sand surface by spreading a chemical substance on the desert surface and desert lands. The mechanical equipment available for desertification and desertification control is usually used in the chemical method to stabilize the sand. After the chemical substance penetrates into the sand to form a layer of hard sand on the desert surface or desert land, the loose sand is stabilized and thus the damage caused by sand is controlled.

[0005] Chinese patents "Modified sand material" (ZL 2013102233 "90.4), "Method for producing modified sand material" (ZL 201310224659.0) and "Method for treating sandy soil by modified sand material (ZL 201310224654.8)" disclose a modified sand or sandy soil that has the mechanical properties, environmental characteristics, air permeability, as well as the water, nutrient and air retention capacity and the growth of microorganisms as fertile natural soil. The modification or "soiling" of the sandy soil or sandy soil enables the control of sand or sandy soil from moving, and the modified or soiled sandy soil or sand is able to retain water and nutrients and make it more suitable for plant growth, so the problem of desertification and desertification can be fundamentally controlled.

[0006] The above-mentioned registered inventions have the following features: the modified sand is formed by mixing sand or sandy soil with a cohesive and cohesive solution produced by dissolving a water-soluble solid organic matter; after mixing with sand or sandy soil, said cohesive and cohesive solution can be bonded to the sand or sandy soil grains, thereby forming a modified sandy material with a porous structure. Water in the cohesive and cohesive solution is retained between the sand or sandy soil granules by the solution. After the water in the cohesive and cohesive solution evaporates, the water-soluble solid organic matter in the sandy soil or sand can be bonded to the sand or sandy soil grains, and when it comes into contact with water, it is dissolved in water again, and thus the cohesive and cohesive solution is formed again and bonded to the sand or sandy soil granules.

[0007] After the water evaporates in the cohesive and integrated solution, the water-soluble solid organic matter in the sandy soil or gravel can be bonded to the grains of the sand or gravel; after the water evaporates in the cohesive and integrated solution, the weight ratio between the remaining solid organic matter and the sandy soil or gravel is between 30-8000:1.

[0008] In addition, there are closed pores and internal connections between the grains of sand or modified sandy soil. The water-soluble organic solids include at least one natural polymer, modified natural polymer, and synthetic polymer.

[0009] And at least one of an organic macromolecular additive, a small molecular additive, a surfactant, an inorganic reactive powder / particle material, an inorganic non-reactive powder / particle material, a solid material, and a pH adjusting agent can then be added to the solution.

[0010] The water-soluble organic solids comprise at least one of polyvinyl alcohol, polyoxyethylene, polyethylene glycol, sodium polyacrylate, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, cellulose ether, and a copolymer thereof.

[0011] The disclosure of the above inventions can seriously aerate sandy soil or soil for the purpose of controlling desertification and desertification.

[0012] In mechanical properties, sand or sandy soil is a granular material. Due to the predominance of sand granule content, it has a "discrete" state in its mechanics, which is described as mobile or mobile and is therefore unstable for supporting plant roots. However, soil exists in two states: in the rheological state when wet and in the solid state when dry, and the two states can be easily transformed into each other, i.e. the rheological state becomes a solid state after evaporation of water or the solid state becomes a rheological state after absorption of water. In both the rheological and solid states, soil is not mobile and can provide a stable support for plant roots.

[0013] In a discrete state, the constraint between sand or sandy soil granules is a contact constraint, and there are only two limited reaction forces: contact pressure and friction, so the sand of the discrete sandy soil moves, may collapse, and is therefore unstable to support plant roots. The typical characteristic of a granular material in a discrete state is that there is a limited slope called the critical angle of repose during accumulation. When a cohesive and cohesive solution is added to the sandy soil or sand, an all-round integration constraint (or "bonding constraint") is formed between the sand or sandy soil grains, so the sandy soil or sand is transformed from a discrete state to a rheological state. The all-round integration constraint (hereinafter referred to as the ODI constraint) can not only produce contact pressure and friction, but also form stress and momentum to connect the granules together, and also have the ability to be all-round and store.The granular material in the rheological state is flexible in granular composition and can be transformed or molded into any shape: both masses can be integrated into one mass, and each mass can be divided into two masses as a wet soil.

[0014] When the ODI constraint among the sand or gravel granules becomes a “fixed” constraint, the granular material becomes a solid. When the fixed constraint causes the reaction forces to limit the granular reconstruction, the granular material in the solid state cannot change its shape, so its granular reconstruction becomes fixed, and when the granular arrangement changes, it means that the soil will collapse or break in the dry state. The mechanical properties of the solid state are characterized by the strength of the bond.

[0015] Due to the frequently water-soluble nature of the organic solids (such as CMC) added to the sandy soil or gravel in the above invention, when the CMC in the dry soil reabsorbs water, the fixed constraint among the granules becomes an ODI constraint, so the "soil" in the dry solid state can be converted to a wet and rheological state.

[0016] The "self-repairing" and "self-regulating" biomechanical properties of soil are determined by the mechanical properties of the stable transition between the rheological state and the solid state.

[0017] The modified sand material (soiled) in the above inventions has the "self-repairing" property of natural soil. "Self-repairing" means that the soil can repair the cracks or damage it suffers in the solid state by returning to the rheological (water-absorbing) state. The economic and mechanical property of "self-repairing" can explain the secret of why soil can maintain its endless ecosystem cycle. Why can soil maintain its endless ecosystem cycle? Since soil can transition between its rheological state and its solid state for years, for example, soil granules can continuously change between the "soft" ODI limit and the "hard" stability limit. Otherwise, soil will no longer be soil. Without the "self-repairing" property, soil will suffer from two extreme scenarios. One is that the constraint among soil granules is so severe that the soil becomes hard; Another is that the constraint among soil granules will weaken until there is no tension between soil granules and only a "contact" constraint remains, indicating that the soil has eventually become desertified.Both hardened and desertified soils are unfavorable for plant growth.

[0018] The biomechanical properties of "self-adjustment" exist only when the soil is in a rheological state. This property is determined by the ODI constraint between the granules. The modified sand or gravel in this invention has the "self-adjustment" property of natural soil. "Self-adjustment" has two reasons. One is that the granular arrangement among the soil granules is flexible; the other is that there is always a binding force among the soil granules. Even when any sand or gravel modified in the rheological state is mixed with each other and its granular arrangement changes, the newly formed modified sand or gravel is still in a rheological state and there is still a binding force among the granules, and the constraint between the granules is still characterized by the characteristics of comprehensiveness and restorability.

[0019] It has been shown in theory and practice that a soil that is favorable for plants has the following characteristics: its ecological properties include ecological and mechanical properties, self-repair and self-regulation, as well as the capacity to retain water, nutrients and air. Such a habitat can be man-made! The "soil" modified from sand and sandy soil has the mechanical properties and ecological properties of natural soil and is therefore essentially the same as natural soil because both are suitable habitats for plants. This is the theoretical basis of the "soiling" of the desert, and also the discovery and creativity of this invention.

[0020] The above-mentioned modified sand material provides a general method for controlling desertification or desertification. During implementation, a special tank is typically used to mix water and organic solids with sand, and then it is used for transportation, discharge and mixing on the surface of the desert or desertified land, which is inefficient and cannot be used for large-scale mechanical desertification. Therefore, a new innovative method for carrying out desertification on a large scale is needed. Therefore, a new method for implementing sand or sandy soil in desert lands is needed, in which the organic matter is directly spread on the surface of the desert or desertified land, and then mixed with the sandy soil or sand on the desert surface so that large-scale mechanical landification is possible. The modified sandy soil or sand is stable, water-retaining and air-permeable as natural soil, and also has the ability to retain nutrients. Planting of plants will be done in sandy soil or amended sand.In this way, the problem that sand has difficulty retaining water and nutrients will be solved, and thus desertification and desertification will be effectively treated on a large scale by mechanical means. Summary of the invention

[0021] Based on the principle of forming modified sandy materials, this invention seeks to provide a new method for implementing soil amendment of sand or sandy soil in desert and desert land. This method is capable of directly spreading organic matter on the surface of desert and desertified land, and then mixing with sandy soil on the desert surface, so that mechanized soil amendment on a large scale is possible. The modified sandy soil or sand is made stable, water-retaining and air-permeable as natural soil, and also has the ability to retain nutrients. Planting of plants will be carried out on the modified sandy soil or sand. In this way, the problem that it is difficult for sand to retain water and nutrients will be solved, and thus desert and desertification can be effectively treated on a large scale by mechanical means.

[0022] The present invention provides a method for treating sandy soil in desert land, which includes the following steps (hereinafter referred to as M1):

[0023] a) spreading water over the surface of a desert or desert land;

[0024] b) spreading a solid organic material over the surface of the desert or desert land;

[0025] c) agitating water, organic solids, and sand or sandy soil on the desert or desert land surface to create a modified sand layer on the desert or desert land surface;

[0026] This step is performed as step a), step b), and step c, respectively. Or

[0027] Steps a) and b) are performed first and simultaneously, respectively, and then step c); or

[0028] In this case, step a) is performed first, and then step b) and step c) are performed simultaneously; or

[0029] In this case, step b) is performed first, and then step a) and step c) are performed simultaneously; or

[0030] Step a), step b), and step c) are performed simultaneously.

[0031] The method for treating sandy soil or sand in desert or desert lands in this invention can be carried out in the following steps (hereinafter referred to as M2):

[0032] a) dissolves an organic solid in water to form a cohesive, uniform solution of the organic solid;

[0033] b) spreading the organic solid solution of step a) onto the desert surface or desert land;

[0034] c) mixing the solid organic matter solution with sandy soil or sand on the desert surface or desert land, to create a modified sand layer on the desert surface or desert land;

[0035] That the steps performed are performed as step a), step b), and step c; or

[0036] In order, step a) is performed first and then step b) and step c) are performed simultaneously; or

[0037] Steps a) and b) are performed first and simultaneously, and then step c); or

[0038] Step a), step b) and step c) are performed simultaneously.

[0039] Step a) in both M1 and M2 can be performed in manual mode, mechanical mode, or a combination thereof; step b) in both M1 and M2 is performed in manual mode, mechanical mode, or a combination thereof; and step c) in both M1 and M2 is performed in manual mode, mechanical mode, or a combination thereof.

[0040] Step mixing c) in both M1 and M2 is performed with a device with an external mixing module in walking mode on a desert surface or desert terrain.

[0041] In step M1, step a) is performed by a device with a spraying module in a walking mode or an irrigation system on the desert surface or desert land; and step b) is performed in a walking mode by a device with a module capable of spreading organic solids on the desert surface or desert land.

[0042] Step b) is performed in both M1 and M2 in walking mode by a device with a module capable of spraying organic solids onto the desert surface or desert terrain.

[0043] The device is a rotary cultivator with an external stirring module.

[0044] The amount of water sprayed on the surface of a desert or desert land can moisten sandy soil to a depth of less than 2 centimeters.

[0045] The method then includes a step of fertilizing the sand or sandy soil of the desert or desert land, wherein the fertilizing is carried out in conjunction with at least one of the above three steps a), b) and c) in both M1 and M2, or separately.

[0046] The method further comprises a step of sowing seeds in sandy soil or gravel in desert or desert lands, wherein the sowing is carried out with at least one of the above three steps a), b) and c) in both M1 and M2, or separately.

[0047] The mixing is performed by a device with an external mixing module in a walking mode on a desert surface or desert terrain, at least once.

[0048] The surface of desert or wilderness lands may be plowed prior to step A in both M1 and M2.

[0049] In this invention, manual mode, mechanical mode or a combination thereof can be used to treat the surface of sandy soil or sand layer in desert or desert land to form a modified sandy material as a modified sandy material described in Chinese Patents “Modified Sandy Material” (ZL 201310223390.4), “Method for Producing Modified Sandy Material” (ZL 201310224659.0) and “Method for Treating Sandy Soil with Modified Sand Material” (ZL 201310224654.8). The method of this invention can be directly implemented on the surface of desert or desert land. In addition, the method of stirring on the surface of desert or desert land can be considered as a planting step for the modified sand or sand to facilitate post-planting operations to provide a suitable habitat for plant growth.

[0050] Desert or desert surface in this invention refers to both the natural surface and the treated surface of desert or desert lands. The purpose of leveling the desert or desert surface is to facilitate the process of compacting sand or sandy soil. Where the original ground surface of the desert or deserts is not sufficiently flat due to erosion, manual or mechanical means may be applied to level the desert or desert land by loosening, grading or compacting to facilitate the subsequent compaction process. The leveled surface of the desert or desert land may have a slope.

[0051] In this invention, the solid organic material can be dissolved in water to form a cohesive and flexible solution. The cohesive and flexible solution can be bonded to the sand or sandy soil grains after mixing with sand or sandy soil; after the water in the cohesive and flexible solution evaporates, the water-soluble solid organic material in the sandy soil or sand can be bonded to the sand or sandy soil grains and, when in contact with water, dissolves in water again, thus forming a cohesive and cohesive solution again, which is present in the sand or soil granules. The water-soluble organic solid material includes at least one natural polymer, modified natural polymer and synthetic polymer. At least one of natural polymers, modified natural polymers, and synthetic polymeric materials that can be dispersed in solution can be added to the solution, and at least one of organic macromolecular additives, small molecular additives, surfactant, inorganic reactive powder / particle material, inorganic non-reactive powder / particle material, solid material, and pH adjusting agent can then be added to the solution.

[0052] In the present invention, when steps a), b) and c) in both M1 and M2 are performed by manual operation, it can be performed as step a), step b) and step c), respectively. Or step a) and step b) are performed first and simultaneously, and then step c); or step a) is performed first and then step b) and step c) are performed simultaneously; or step b) is performed first and then step a) and step c) are performed simultaneously; or steps a), b) and c are performed simultaneously.

[0053] In this invention, "simultaneously" refers to the simultaneous execution of two or more steps in a short time without regard to which step is performed first. To ensure the satisfactory result of this invention, after the completion of the three steps, water is sprayed onto the surface of the desert or parched land, or the water is kept in a cohesive and cohesive solution of organic solids mainly in the surface layer of sand or sandy soil.

[0054] In this invention, when steps a), b) and c) are performed by mechanical equipment, steps a), b) and c) can be performed separately one step after another by different devices; or steps a), b) and c) can be performed by one device with all the required functions one step after another or simultaneously.

[0055] In this invention, the water spraying device may be a device capable of spraying water or an irrigation device for use in agriculture. The device capable of spreading organic solids may be a fertilizer spreader, seed spreader, feeding device, etc.

[0056] When the tillage method is carried out by mechanical means, to achieve the purpose of this invention and to facilitate post-planting operations in sandy soil, the mechanical equipment may be equipped with one or more auxiliary devices for leveling the ground, planting, fertilizing, spraying insecticides, etc.

[0057] As an object of this invention, the soiling of the surface layer of sandy or sandy soil in desert or desert lands is desirable for plants, the soiling process may be carried out manually or mechanically or a combination thereof, together with one or more operations such as fertilization and planting in order to provide the necessary conditions for plant growth.

[0058] In this invention, the mechanical device with an external stirring module can be a rotary cultivator. The rotary cultivator rotates and mixes sand or sandy soils in deserts and deserts using its tine to create a uniform mixture of sandy soil, water and organic matter, thereby creating a suitable habitat for planting. The rotary cultivator is inexpensive and desirable in terms of mixing effect for implementing this invention.

[0059] The mechanical equipment for this invention is not limited to the rotary cultivator, and can be any mechanical device or combination of mechanical devices with the following functions: 1) spreading organic solids on the desert surface or desert land in a uniform material; 2) spreading water (or liquid with water as the main component) on the desert surface or desert land uniformly; 3) mixing water, organic solids and the surface layer of sand on the desert or desert land uniformly, and also, if necessary, it can be installed with one or more auxiliary devices for leveling the land, planting, spraying insecticide, etc. The invention can also be implemented with only one integrated machine with the function of spraying water and organic solids into a uniform material, and then mixing with sand or sandy soils on the desert surface by one or more operations.

[0060] By using manual or mechanical means or a combination thereof, the cohesive and integrated solution after mixing with sand or sandy soil can bond with the sand granules to form a modified sandy material with a porous structure. Water is stored in the cohesive and integrated solution between the sand or sandy soil granules. After the water in the cohesive and integrated solution evaporates, the water-soluble solid organic matter in the sandy soil or sand can be bonded to the sand or sandy soil grains and, when in contact with water, it will be dissolved in water again, and thus the cohesive and integrated solution is re-formed and bonded to the sand or sandy soil granules. The modified (earthed) sand or sandy soil in the desert or desert has the characteristics of natural soil. The whole earthing process is simple and efficient. Sandy or gravel soil in desert or desert lands can be directly compacted without conventional transportation methods and embankment after compaction, thus saving cost and time.In addition, the mixing method on the desert or desert land surface can also be considered as a planting step for sandy soil to facilitate planting operations to provide a good habitat for plants.

[0061] The advantages of the invention are that the modified sand material is described in Chinese Patents "Modified Sand Material" (ZL 2013102233 "90.4), "Method for Producing Modified Sand Material" (ZL 201310224659.0) and "Method for Treating Sandy Soil by Modified Sand Material" (ZL 201310224654.8) and can be directly applied by manual or mechanical means or a combination thereof, by first spraying water and organic solids onto the desert surface or desert land, or directly spraying a cohesive and cohesive solution containing organic solids onto the desert surface or desert land, and then mixing the water and organic solids or its solution with sand uniformly.

[0062] This invention is fundamentally different from the traditional agricultural operations of planting, sowing, fertilizing, weeding, harvesting, and irrigation.

[0063] Rotary cultivators are also used in traditional soil cultivation, but the purpose is to loosen the soil. Sowing is the process of planting seeds embedded in the soil at a specified depth and spacing. Fertilization is the addition of nutrient supplements to natural soil, which cannot provide adequate nutrition for plants. Weeding is the removal of weeds using manual or mechanical tools in order to provide favorable conditions for crop growth. When natural rainfall is insufficient or unevenly distributed and crops do not have enough water, irrigation is necessary to provide water for crop growth for a good harvest.

[0064] The above cultivation, planting, fertilization, weeding, harvesting and irrigation operations are only for agriculture, not for sand treatment, and the difference between agricultural techniques and this invention is in the purpose, materials used, effect, theoretical principles and purpose.

[0065] According to the objectives of this invention, the invention is to soil the surface layer of desert or desert land to enable sandy soil to acquire the biomechanical properties of soil, change the relationship between sand granules and form a porous structure with a connecting force (cohesion force) between sand granules, so that the modified sandy soil or sand has the economic and mechanical properties of natural soil and the capacity to retain water, nutrients and air, in order to provide a favorable habitat for plant growth.

[0066] In terms of the materials used, the invention uses a water-soluble organic solid. The organic solid can be dissolved in water to form a cohesive and cohesive solution. The cohesive and cohesive solution can be bonded to the sand grains after being mixed with sand or sandy soil, thereby forming a modified sandy material with a porous structure. The water in the cohesive and cohesive solution is retained between the sand or sandy soil granules by the solution. After the water in the cohesive and cohesive solution evaporates, the water-soluble organic solid in the sandy soil can bond the sand or sandy soil granules together, and when it comes into contact with water, it dissolves again, and thus there is again a cohesive and cohesive solution in the sand or sandy soil granules.

[0067] In this invention, after the organic solid is dissolved in water and then mixed with sandy soil or gravel, the ODI confinement is formed among the modified sand or gravel granules for easy transition between the rheological state and the solid state, thereby obtaining the mechanical properties and thus the self-repairing and self-regulating biomechanical properties of natural soil.

[0068] In terms of theoretical principles, this invention is based on the granule confinement theory proposed by the applicant. The modified sand or sandy soil is transformed from a discrete state to a rheological state having the same mechanical properties as natural soil after the bonding constraint (ODI constraint provided by the organic solid solution) is formed among the sand granules. When the water in the "bonding constraint" evaporates, the "bonding constraint" becomes a "fixed constraint", and the modified sand or sandy soil is transformed from a rheological state to a solid state having the same mechanical properties as dry soil. When the modified sand or sandy soil absorbs water again, it returns from a solid state to a rheological state. Therefore, the modified sand or sandy soil has the same stable mechanical properties as natural soil, whether it is wet or dry. Furthermore, a mixture of sand and sandy soil, water, and organic solids is completely compatible with nature because its adhesion and cohesion are maintained.In terms of water and nutrient retention capacity, modified sand is composed of restricted and porous-structured granules (either in dry or wet states), so it can freely exchange water, nutrients, and air with the external environment, hence modified sand or sandy soil is capable of retaining water and nutrients.

[0069] In terms of purpose, the aforementioned agronomic techniques have not been used in the case of desert or desert lands, which are usually detrimental to plant growth, and this invention is provided with the aim of using them to improve sandy soil in desert or desert lands.

[0070] In terms of effect, planting experiments in sandy and sandy soil have proven that any sand (including sandy soil with sand as the main component) can be turned into soil by applying a restriction to that soil and then become a suitable habitat for plants. The soiled sand or sandy soil can maintain its ecological and environmental-mechanical properties for many years, which indicates that the “bonding constraint” created by the above method can be maintained among the sand granules. When plants grow in sandy and sandy soil, better protection is formed by the roots along with the bonding constraint, and in addition, when the roots, stems and leaves of the plants decompose, the viscous solution acts as a kind of “bonding constraint” in the mechanics to enhance the soiling effect. Experiments have shown that heavy rain does not destroy the bonding constraint between sand granules; Conversely, many algae grow on the surface of the soil to create a protective layer to limit the inside.Thus, a new ecological system is formed, and as the soiled sand becomes more fertile, it exhibits even greater soil properties.

[0071] The theoretical principles, purpose and intent of this invention determine that steps a), b) and c) in both M1 and M2 are closely and necessarily interrelated with each other. Only after the completion of the three steps is the earthing achieved.

[0072] The ultimate goal of this invention is to move sand or sandy soil in desert lands to form a suitable habitat for plant growth. Therefore, during or after the soiling process, planting or fertilization operations can be performed so that plants can soon grow in the amended sand or sandy soil. Although planting and fertilization operations are not part of this invention, they are necessary for plant growth after the steps of this invention.

[0073] This invention can aerate sandy or gravelly soil in desert and desert lands.

[0074] Overall, the invention is fundamentally different from traditional agricultural techniques of tillage, fertilization, planting, weeding, harvesting, and irrigation operations used for natural soil.

[0075] This invention also differs from prevailing sand control methods.

[0076] In the dominant sand control methods, the vegetation method is to grow plants in desert and desertification areas to improve the natural environment; the engineering method is to mechanically reduce the wind speed to temporarily cause sand to fall. The chemical method is to spray a chemical on the desert surface so that the surface layer of sand sticks together by chemical penetration to form a protective coating or layer on the desert surface, so that the sand is not easily blown away by the wind. In short, the vegetation method is to plant trees. The engineering method is to disturb the movement of sand, and the chemical method is to form a hard or protective coating or layer (in a solid state) that cannot be returned to the rheological state.

[0077] In this invention, a designed "soil" layer of a certain thickness is formed on the surface of a desert or desert land by mixing sand, water and organic solids. This invention successfully turns sandy or sandy soil into soil by mixing sand, water and organic solids uniformly to create a suitable habitat for plant growth, thus achieving two objectives: stabilizing sand and plant growth. Compared with the vegetation method for controlling sand that does not change the characteristics of sand, this invention changes the nature of the plant habitat and promotes the desired growth of plants. Compared with the engineering method, instead of reducing the wind speed to prevent sand movement, this invention prevents sand movement by changing the nature of the sandy or sandy soil once and for all. Compared with the chemical method that only solidifies the surface layer of the desert or desert land by forming an inflexible and hard layer, this invention converts the sandy or sandy soil layer in the desert or desert land into soil with the environmental characteristics of natural soil.

[0078] In summary, the present invention can rapidly aerate the surface layer of sandy or gravel soil in desert and desert lands and transform it into a suitable habitat for plants, differently from conventional sand control methods and also differently from traditional agricultural practices. Detailed description of the invention

[0079] An example of a method for treating (soiling) sand or sandy soils in desert or desert lands includes the following steps: (M1):

[0080] a) spreading water over the surface of a desert or desert land;

[0081] b) spreading a solid organic material over the surface of the desert or desert land;

[0082] c) agitating water, organic solids, and sand or sandy soil on the desert or desert land surface to create a modified sand layer on the desert or desert land surface;

[0083] The organic solid is dissolved in water to form a cohesive and cohesive solution; the cohesive and cohesive solution can be attached to the sand or sandy soil granules after being mixed with sand or sandy soil; after the water in the cohesive and flexible solution evaporates, the water-soluble organic solid in the sandy soil can attach the sand or sandy soil grains together, and when it comes into contact with water, it dissolves again, and thus there is again a cohesive and cohesive solution in the sand or sandy soil granules.

[0084] In this example, the method is carried out in step a), step b) and step c), respectively. Water and organic solids are sprayed in step a), step b) and step c) according to Chinese Patents “Modified Sand Material” (ZL 2013102233 “90.4), “Method for Producing Modified Sand Material” (ZL 201310224659.0) and “Method for Treating Sandy Soil by Modified Sand Material” (ZL 201310224654.8).

[0085] These steps are performed in the order of step a), step b), and step c), or step a) and step b) first and simultaneously, and then step c); or step a) first and then step b) and step c) simultaneously, or step b) first and then step a) and step c) simultaneously; or steps a), b), and c) are performed simultaneously. Different configurations may be used for different environmental conditions of the desert or desert terrain. For example, when the wind is quite strong, it is better to perform step b) and step c) simultaneously.

[0086] The ultimate goal of this invention is to form a modified sand material, which is described in Chinese patents “Modified sand material” (ZL 2013102233 "90.4), “Method for producing modified sand material” (ZL 201310224659.0) and “Method for treating sandy soil by modified sand material” (ZL 201310224654.8), so the implementation method can also follow the following steps:

[0087] a) spreading water over the surface of a desert or desert land;

[0088] b) spreading a solid organic material over the surface of the desert or desert land;

[0089] c) agitating water, organic solids, and sand or sandy soil on the desert or desert land surface to create a modified sand layer on the desert or desert land surface;

[0090] wherein the steps are performed in the order of step a), step b), and step c), or step a) and step b) first and simultaneously, and then step c); or step a) first and then step b) and step c) simultaneously, or step b) first and then step a) and step c) simultaneously; or steps a), b), and c) are performed simultaneously.

[0091] All of these methods can achieve the purpose of this invention.

[0092] The organic solid is dissolved in water to form a cohesive and cohesive solution; the cohesive and cohesive solution can be attached to the sand or sandy soil granules after being mixed with sand or sandy soil; after the water in the cohesive and flexible solution evaporates, the water-soluble organic solid in the sandy soil can attach the sand or sandy soil grains together, and when it comes into contact with water, it dissolves again, and thus there is again a cohesive and cohesive solution in the sand or sandy soil granules.

[0093] Desert or wilderness surface in this invention refers to both the natural surface and the improved surface of desert or wilderness lands. The purpose of leveling the desert or wilderness surface is to facilitate the process of soiling sand or sandy soil. Where the original surface of the desert or wilderness land is not sufficiently level due to erosion, manual or mechanical means may be used to level the desert or wilderness surface by loosening, grading or compacting to facilitate the subsequent soiling process. The leveled desert or wilderness surface may have a slope.

[0094] In this case, step a) can be performed in a manual mode, a mechanical mode, or a combination thereof; step b) can be performed in a manual mode, a mechanical mode, or a combination thereof; step c) can be performed in a manual mode, a mechanical mode, or a combination thereof.

[0095] In this configuration, manual or mechanical mode or a combination thereof can be used to spray water and organic matter in any direction, or directly spray the cohesive and homogeneously dissolved solution of organic solids onto the desert surface or desert land, and then the water and organic matter or the organic matter-containing solution is mixed with sand on the desert surface or desert land into a uniform material to form a modified sand material similar to the Chinese Patents “Modified Sand Material” (ZL 2013102233 “90.4), “Method for Producing Modified Sand Material” (ZL 201310224659.0) and “Method for Treating Sandy Soil by Modified Sand Material” (ZL 201310224654.8). This sand treatment method can be directly implemented on the desert surface or desert land. In addition, the mixing method on desert or desert land can also be carried out according to a step Planting is used for sandy or gravelly soil to facilitate planting which will later provide a suitable habitat for plants.

[00100] In this configuration, step c) is performed in a walking mode by a device with an external mixing module, while mixing is performed on a desert surface or desert land; the device with an external mixing module includes a rotary cultivator, road construction equipment with a mixing device, etc.

[00101] In this configuration, the device with an external stirring module refers to a rotary cultivator. The rotary cultivator uses its blades to rotate and mix sand or sandy soil in desert and desert terrain to form a uniform mixture of soil, water and organic solids to provide good conditions for seeding and planting therein. The rotary cultivator used to implement the present invention is low-cost and favorable in terms of mixing effect.

[00102] The mechanical equipment for this configuration can be any mechanical device or combination of mechanical devices with the following functions: 1) spreading organic solids on the surface of the desert or desert land in a uniform material; 2) spraying water (or a liquid with water as the main component) onto the surface of the desert or desert land uniformly; 3) mixing water, organic solids and the surface layer of sand on the desert or desert land uniformly, and also, if necessary, it can be installed with one or more auxiliary devices for leveling the land, seeding, spraying insecticide, etc. The invention can be implemented with only one integrated machine with the function of spraying water and organic solids into a uniform material, and then mixing with sand or sandy soils on the surface of the desert or desert land in one or more operations.

[00103] In this configuration, the three steps a), b) and c) of the present invention can be performed by different devices with the desired function or functions or can be performed by other devices integrated with two or three functions. The mechanical equipment may operate repeatedly to perform the steps of the present invention. Each step of the present invention should not be performed less than once to achieve the purpose of the present invention. In addition, to facilitate planting after soiling, the mechanical equipment of the present invention can be installed with one or more devices with capacities such as leveling, planting and fertilizing.

[00104] In this configuration, step a) is performed in a walking mode by a water sprinkler distributing water on the desert surface or desert land and can also be performed by an irrigation system for agricultural use; step b) is performed by a device capable of spraying organic solids, pre-spreading on the desert surface or desert land.

[00105] In this configuration, step b) is performed by a device with a spreading capacity that is pre-spread on the desert surface or desert land; the spreading device refers to a device capable of spreading a solution containing solid organic matter on the desert surface or desert land, similar to a water spray device or other devices with a capacity to pump the solution onto the desert surface or desert land, such as an irrigation system.

[00106] In this configuration, any one, two or all three steps a), b) and c) may be implemented by one or more machines with such capacities, either individually or together (i.e., the three steps may be implemented by one or more machines without affecting the scope of the invention), but each step shall not be performed less than once. When steps a), b) and c) are performed separately on different machines, the machines shall be well coordinated to ensure that each step is sufficiently performed to compact the surface layer of the desert or desert land. Similarly, both steps may be performed by one machine integrated with the required functions, and then the second machine completes the final step to compact the desert or desert land. Similarly, all three steps in this configuration may be completed by one machine for compacting the desert or desert land, but each step shall not be performed less than once.

[00107] The mechanical device for spreading water on the desert surface or desert land may be a water spraying device, an asphalt spraying machine, etc. The facility for spreading organic solids on the desert surface or desert land may be a spreading machine capable of spreading organic solids evenly on the desert surface or desert land, and may also be seeding or spreading capable of spreading organic solids evenly at a designated depth of the desert or desert land. The facility for mixing water, organic solids, and sand may be a rotary cultivator, and may also be other machines capable of advancing in the desert, collecting sand, mixing with organic solids, and then spreading the mixture on the desert surface or desert land. The step of dissolving the organic solids in water may be carried out by a sprayer, mixer, etc. The solution containing organic solids may be spread by a water sprayer, an asphalt sprayer, etc.

[00108] In this configuration, the amount of water spread on the desert or desert land surface should be able to create a surface layer of wet sand at an average depth of not less than 2 cm, in specific conditions, a depth of 20-60 cm, to achieve the purpose of the present invention. If the water penetrates into the deep layer of sandy soil or sand, the purpose of the present invention is also understandable. A suitable layer of wet sand not only helps to moisten the surface layer of the desert or desert land to provide a suitable environment for plant growth, but also reduces the cost.

[00109] In this configuration, the fertilization operation for the desert or desert surface layer may be related to at least one of the three steps of the present invention or may be performed independently. The fertilization for the desert or desert surface layer may be performed by a conventional fertilization device for agricultural use prior to steps a, b, and c or with any of these three steps. After mixing, the fertilizer should be evenly spread on the sandy soil or modified sand. For example, the solid fertilizer can be mixed with organic solids and then spread on the desert or desert surface for more efficient treatment of desert and desert lands.

[00110] In this configuration, the planting operation may be performed in conjunction with at least one of these three steps or independently. Any conventional seeding device for agricultural use may be used for planting in sandy and gravelly soil. Planting may also be performed in one of the three steps of the invention. It is recommended that the planting operation be performed after the mixing operation (step c) to prevent damage to the seeds by the mixing devices.

[00111] In this configuration, the stirring operation by a device with an external stirring module in a walking mode must be performed at least once to provide uniform mixing so as to form a suitable modified sand material.

[00112] In this configuration, before step a), the desert or wilderness land surface may first be leveled. The leveling operation may be performed by rotary cultivators, scrapers or plowing machines and the like to create a level surface on the desert or wilderness land in order to achieve the purpose of the present invention. Leveling refers to large-scale leveling, and the leveled surface may have a slope.

[00113] The difference between steps a), b) and c) performed in the different sequences of this invention is only in the direction of adding water and solid organic matter for the subsequent stirring operation and the final result is the same. The choice of sequence depends on the specific environmental conditions.

[00114] Finally, it is to be noted that the above configurations are only some configurations for realizing the present invention. It is to be noted that the present invention is well illustrated in the above configurations, but a person of ordinary skill in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope thereof, and various changes and modifications are within the scope of the present invention. Complaint 1. A method for treating sandy soil in desert land that includes the following steps: a) Spreading water over the surface of a desert or desert land; b) Spreading a solid organic material on the surface of a desert or desert land; (c) Agitation of water, organic solids and sand or sandy soil on the surface of a desert or desert land in order to create a layer of modified sand on the surface of the desert or desert land; In which the steps are performed as step a), step b), and step c, respectively. Or Step a) and step b) are performed first and simultaneously, and then step c); or In this case, step a) is performed first, and then step b) and step c) are performed simultaneously; or In this order, step b) is performed first, then step a) and step c) are performed simultaneously; or Step a), step b), and step c) are performed simultaneously. 2. A method for treating sandy or gravelly soil in desert or desert lands, comprising the following steps: a) Dissolving an organic solid in water to form a cohesive, cohesive solution of the organic solid; b) spreading the organic solid solution in step a) onto the desert surface or desert land; c) mixing the solid organic matter solution with sandy soil or sand on the desert surface or desert land, to create a layer of modified sand on the desert surface or desert land; In which step is performed in the order of step a), step b), and step c; or In order, step a) should be done first and then step b) and step c) should be done simultaneously; or Step a) and step b) are performed first and simultaneously, and then step c); or Step a), step b), and step c) are performed simultaneously. 3. A method for treating sandy soil in desert or desert land according to claim 1 or 2, wherein step a) is carried out in a manual mode, a mechanical mode or a combination thereof; step b) is carried out in a manual mode, a mechanical mode or a combination thereof; and step c) is carried out in a manual mode, a mechanical mode or a combination thereof. 4. A method for treating sandy soil or sand in desert or desert land according to claim 1 or 2, wherein in step (c), the agitation is performed by a device with an external agitation module in a walking mode on the desert or desert land surface. 5. A method for treating sandy soil in a desert or desert land according to claim 1, wherein in step a), spreading water is performed by a device with a spray module in a walking mode or by an irrigation system on the desert or desert land surface; and in step b) spreading on the desert or desert land surface in a walking mode is performed by a device with a module capable of spreading organic solids. 6. A method for treating sandy soil in desert or wilderness land according to claim 2, wherein in step b) spreading on the desert or wilderness land surface is carried out by a device with a spreading module in a walking mode. 7. A method for treating sand or sandy soil in a desert or desert land according to claim 4, wherein the device with an external stirring module is a rotary cultivator. 8. A method for treating sandy soil in desert and desert land according to claim 1 or 2, wherein the amount of water spread over the surface of the desert or desert land can cause the formation of sandy soil or wet sand with an average depth of at least 2 centimeters. 9. A method for treating sandy soil or sand in desert or desert land according to claim 1 or 2, further comprising fertilizing the desert or desert land surface, wherein the fertilizing is carried out together with at least one of steps a), b) and c) or separately. 10. A method for treating sandy soil or sand in desert or desert lands according to claim 1 or 2, further comprising sowing seeds onto the desert or desert land surface, wherein the sowing is carried out with at least one of steps a), b) and c) or separately. 11. A method for treating sandy soil in desert and desert land according to claim 4, wherein the stirring is performed with a device with an external stirring module in a walking mode at least once. 12. A method for treating sandy soil in desert or desert land according to claim 1 or 2, further comprising, prior to step a), leveling the surface of the desert or desert land. Abstract of the invention A method of controlling desert or sand. Spraying water and spreading organic solids is carried out manually or mechanically on the surface of the desert or sand in any direction, or a solution having cohesion and adhesion and composed of organic solids is directly sprayed. A sand body on the surface of the desert or sand is sprayed with a solution composed of organic solids, or is spread with organic solids and sprayed with water, and is uniformly stirred using a stirring device, so that the sand body on the surface layer of the desert or sand is modified into a modified sand body. The control method can be directly placed on the desert or sand required for control, and the modified sand body does not need to be separately flexible using a stirrer, so that a lot of construction costs are saved and construction efficiency is improved. In addition, the process of stirring the topsoil or sand can also be used as an agricultural process on the topsoil or sand that has been converted to soil, in order to facilitate subsequent seeding operations on the controlled topsoil or sand.

Claims

CLAIMS 1. A method for treating sand or sandy soil in desert or desertified land , compris ing the following steps: a) s pread ing water onto the surface of the desert or desertified land; b) s pread ing a solid organic substance onto the surface of the desert or desertified land; c) stirring water , the solid organic substance and the sand or sandy soil on the surface of the desert or desertified land to form a modified sand layer on the surface of the desert or desertified land ; wherein the steps are performed in the order of Step a), Step b) and Step c); or in the order of Step a) and Step b) firstly and simultaneously , and then Step c); or in the order of Step a) first ly , and then Step b) and Step c) simultaneously; or in the order of Step b) first ly , and then Step a) and Step c) simultaneously; or Step a), Step b) and Step c) simultaneously.

2. A method for treating sand or sandy soil in desert or desertified land , compris ing the following steps: a) dissolving a solid organic substance into water to form an adhesive and cohesive aqueous solution of the solid organic substance; b) s pread ing the solution of the solid organic substance in Step a) onto the surface of the desert or desertified land; c) stirring the solution of the solid organic substance with the sand or sandy soil on the surface of desert or desertified land to form a modified sand layer on the surface of the desert or desertified land ; wherein the steps are performed in the order of Step a), Step b) and Step c); or in the order of Step a) firstly , and then Step b) and Step c) simultaneously; or in the order of Step a) and Step b) firstly and simultaneously, and then Step c); or Step a), Step b) and Step c) simultaneously.

3. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2, wherein Step a) is conducted in manual mode, mechanical mode, or a combination thereof ; Step b) is conducted in manual mode , mechanical mode, or a combination thereof ; and Step c) is conducted in manual mode , mechanical mode, or a combination thereof .

4. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2, wherein in Step c) , the stirring is conducted by a device with an external stirring module in walking mode on the surface of the desert or desertified land.

5. The method for treating sand or sandy soil in desert or desertified land according to claim 1 , wherein in Step a) , the spreading of water is conducted by a device with a spraying module in walking mode or by an irrigation system on the surface of desert or desertified land; and in Step b) , the spreading onto the surface of the desert or desertified land is conducted in walking mode by a device with a module capable of spr ead ing out the solid organic substance .

6. The method for treating sand or sandy soil in desert or desertified land according to claim 2 , wherein in Step b) , the spr ead ing on to the surface of the desert or desertified land is conducted by a device with a spr ead ing module in walking mode.

7. The method for treating sand or sandy soil in desert or desertified land according to claim 4 , wherein the device with an external stirring module is a rotary cultivator.

8. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2 , wherein the amount of water spread onto the surface of the desert or desertified land is able to make the sand or sandy soil wet in an average depth of not less than 2cm.

9. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2, further comprising fertilizing the surface of the desert or desertified land, wherein the fertilizing is conducted together with at least one of steps a) , b) and c), or separately.

10. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2, further comprising sowing seeds to the surface of the desert or desertified land, wherein the sowing is conducted together with at least one of steps a), b) and c) , or separately.

11. The method for treating sand or sandy soil in desert or desertified land according to claim 4 , wherein the stirring by a device with an external stirring module in walking mode is conducted at least once.

12. The method for treating sand or sandy soil in desert or desertified land according to claim 1 or 2, further comprising prior to Step a) , leveling the surface of the desert or desertified land.