Novel environment-friendly, healthy, degradable and harmless plant mulching film prepared from straws, root systems, branches and leaves and like of green and natural plants

Abstract

The novel plant mulching film which is prepared from straws, root systems, branches and leaves and the like of green natural plants and has the characteristics of environmental protection, health, degradability, no harm and the like has good functions of ventilation, heat preservation, moisture preservation, sound insulation, noise reduction and the like, so that agricultural plant seedlings below the mulching film and microorganisms in the earth surface are protected from being damaged by various external noises and the like; the mulching film can replace chemical plastic mulching film products which are harmful to the environment, ecology and crops. Plant raw materials are sorted, crushed and uniformly mixed, then plant raw material fragments with different lengths and sizes are automatically screened and separated out through a machine, and the natural plant fragments are pressed into types similar to'jute bag cloth ', 'gauze' and the like by adopting a mechanical rolling method so as to meet the requirements on the mulching film under different conditions. The plant mulching film can also be used for sound insulation, noise reduction, heat preservation and the like in the fields of urban construction, road traffic and the like. The plant mulching film can reduce harm to human beings and pollution to the environment, and has a good market application prospect.

Description

Technical Field

[0001] The present invention relates to the fields of agricultural mulch film, product safety, environmental protection, human health, etc.

[0002] The purpose is to provide a green, environmentally friendly, crop-friendly, human-health-friendly, naturally degradable agricultural plant material mulch. Background Art

[0003] The existing traditional agricultural mulch film is a petrochemical plastic product. The main components of plastic mulch film are chemicals such as polyethylene, polystyrene, polypropylene, polyvinyl chloride, etc. It is usually a transparent or black film, also known as plastic agricultural film. It is widely used in agricultural planting for ground covering to increase soil temperature, retain soil moisture, maintain soil structure, prevent pest invasion, etc., and to a certain extent plays a role in protecting and promoting plant growth.

[0004] The technical analysis of plastic mulch products is as follows: 1. Hazards of plastic mulch: Plastic mulch has promoted the development of traditional agriculture to a certain extent, but mulch made from petrochemical products has polluted the human ecological environment, affected the quality of agricultural products, and is difficult to degrade, causing a certain degree of irreparable losses and harm to human survival.

[0005] In agricultural production, a large amount of plastic mulch is used every year. After being exposed to wind and sun, most of them are damaged and broken, and it is not convenient to clean and recycle. These agricultural mulch wastes that will not rot for hundreds of years remain in the soil, which will cause the following major hazards: ① It seriously affects the growth of crop roots and the vitality of microorganisms, causing soil compaction, and also hinders the deep rooting of crop roots and the absorption of soil nutrients and water, resulting in reduced crop yields; ② Some will grow into "plastic" agricultural products, "plastic food", "plastic vegetables", etc.; ③ It causes serious harm to soil microorganisms, damages the ecological environment, causes damage to the ecological chain of plants and organisms, and seriously affects human living conditions.

[0006] (II) Limitations and hazards of degradable mulch: Degradable mulch is a new type of degradable mulch. Its degradation principle is to add degradable biomass into the plastic component, so that large pieces of plastic can be easily degraded into small pieces of plastic. However, this kind of degradation is not true and complete degradation, but only degraded into small particles of plastic. The tiny plastic particles are also called "microplastics". These small particles of plastic still remain in the soil, and the existing technology cannot continue to completely degrade small particles of plastic. This kind of degradation is only a surface phenomenon, which only turns plastic blocks into plastic particles, but they still exist in the soil environment, and the actual degradation is not significant.

[0007] Therefore, it is of great significance to develop a new type of mulch film that is environmentally friendly, healthy and degradable. Summary of the invention

[0008] The present invention is a green, environmentally friendly, crop-safe, human-health-friendly agricultural plant material mulch film that can be naturally degraded, that is, a green, environmentally friendly, healthy, degradable new natural plant mulch film.

[0009] The new type of natural plant mulch is characterized by using green natural plant straw, plant roots, plant branches and leaves, etc., which are sorted, crushed, and evenly mixed, and then automatically screened by a machine to separate plant raw material fragments (blocks, particles, etc.) of different lengths and sizes. The plant raw material fragments are classified according to their different sizes, and some of the straws are then mechanically crushed for a secondary time, processed by soft silk (floccose fiber structure), etc. The above plant raw materials with different particle structures are evenly mixed and pressed into plant mulch films in styles similar to "cool mats", "window flowers", "window paper", "gunny cloth", "gauze" or "horse manure paper". These plant mulches are characterized by different sizes of fragments, different arrangement densities, and different pressed thicknesses, and have different air permeability, heat preservation and noise reduction effects, so as to be suitable for agricultural mulch film requirements in different geographical environments.

[0010] The processing methods of plant mulch can be a mixture of various plant straws, a semi-woven method, a woven method, etc., and the thickness is about several millimeters to several centimeters.

[0011] The thickness of thinner plant mulch is similar to the wall thickness of horse manure paper, mats or conventional cardboard boxes, and is mainly used in agricultural mulch and other fields.

[0012] Thicker plant mulch can be used as filling materials or board structures for "sound insulation, noise reduction, and thermal insulation". Its sound insulation, noise reduction, and thermal insulation effects depend on the particle size of the "plant mulch" straw, the size of the gaps inside the straw fibers, and the overall density. The different sizes of these parameters correspond to different bands of the sound insulation and noise reduction spectrum.

[0013] Technical Solution In order to achieve the above-mentioned invention object, the present invention adopts the following technical solutions: (I) The preparation process of plant mulch mainly includes the following steps: 1. Main processing steps: ① Material preparation: mixing of various plant raw materials; ② Laying flat: the raw materials are spread out flat; ③ Point pressing: evenly distributed point pressing or top pressing is to increase the degree of mixing "teething" and "biting" between materials such as plant straw; ④ Gluing: shower-type, horizontal or inclined spraying; ⑤ Rolling: Horizontal overall rolling forming.

[0014] 2. Main processing methods: ① Various plant straws are evenly mixed and pressed; ② After pressing various plant straws separately, they are combined and pressed again, similar to the production method of three-ply board and five-ply board; ③ After pressing multiple plants together, press them together in multiple layers.

[0015] 3. Specific processing flow: ①Raw material preparation Prepare various green natural plants, green natural plant adhesives and other auxiliary materials as needed.

[0016] Green natural plants include the stalks, roots, branches and leaves of corn, sorghum, wheat, rice, reeds and hay.

[0017] Green natural plant adhesives include starch glue, gum, rosin glue, lignin glue, etc.

[0018] ② Plant raw material sorting Green natural plants are classified and sorted according to different plant species and different plant structures (plant stalks, plant roots, plant branches and leaves, etc.).

[0019] ③ Plant crushing The sorted plants are classified and crushed according to different needs, and each different structure needs to be crushed separately according to the requirements of different fragment sizes and crushed to the required particle length.

[0020] ④Screen according to the size of different fragments According to different plants, different plant structures (straw, roots, branches and leaves, etc.), and different fragment lengths, machines are used to automatically screen and separate plant raw material fragments of different lengths and sizes (blocks, particles, etc.), and store them in different plant raw material storage boxes.

[0021] ⑤Proportion of plant raw materials According to the different working conditions, usage conditions and performance requirements of the mulch film, plant raw materials with different mulch film performances are mixed according to the required proportions.

[0022] ⑥Uniform mixing of plant raw materials Evenly mixed and proportioned plant material fragments with different mulch film properties.

[0023] ⑦Spread the raw materials flat ⑧Rolling machine rolling After the plant material fragments and the flocculent straw are evenly mixed, they are rolled by a roller. The roller of the roller has a multi-distributed cylindrical structure similar to a "capless rivet". The function is to make each part of the plant film more fully compacted by point pressure. At the same time, each cylindrical structure similar to a "capless rivet" can also rotate slowly along its axis. After the plant film is evenly distributed by point pressure, top pressure or rotation pressure (similar to screwing), the plant straw and other materials are more densely "bite" or "teeth", the purpose is to increase the degree of close connection between the plant straws.

[0024] ⑨Gluing (spraying glue): Without adding any harmful chemicals, green natural plant adhesives can be added or sprayed to bond the plant mulch straws together. The purpose is to improve the structural properties and tensile strength of the plant mulch to meet the requirements for mulch performance under different climatic and geographical conditions.

[0025] ⑩Rolling machine rolling again: The glued plant mulch is sent to the rolling machine again for uniform rolling and forming to form the basic layer of different types of plant mulch.

[0026] 4. Combined use: Multi-layer plant mulch film combination production Figure 1 As shown. First, various plant straws are pressed into mulch substrates separately, and then the layers of substrates are combined, stacked, and glued to form them, which is similar to the production method of "three-ply board and five-ply board" in wood processing, that is, two or more plant mulch films are combined, stacked, and pressed together to form a multi-layer plant mulch film. According to actual needs, each layer of mulch substrate can be made of a single plant straw raw material or a mixed plant straw raw material.

[0027] (II) Packaging, transportation, storage and sales The prepared plant mulch is bundled, packaged, transported to designated locations for storage, and sold.

[0028] 3. Use of plant mulch in farmland and its post-processing 1. Use of plant mulch in farmland: Different types of plant mulch films are selected according to different seasons, different climatic conditions, different geographical locations and other crop planting conditions. Plant mulch films have certain heat preservation (heat preservation properties of plant straw, etc.), moisture retention (preventing surface water from evaporating and absorbing and condensing water in the air) and breathability functions to protect the agricultural plant seedlings under the mulch film; the plant fiber structure of plant mulch films also has noise reduction functions such as sound absorption and sound insulation to protect the microorganisms under the mulch film and on the surface from being harmed by various noises from the outside world.

[0029] 2. Post-treatment of plant mulch: Plant mulch is made from crushed green and natural plant straw, plant roots, plant branches and leaves, etc., and does not contain overly long plant fibers. Although it is formed through point pressing, rolling, etc., it does not form a relatively strong woven structure, so it does not have excessive tensile strength. The adhesive used is also a green and natural plant adhesive.

[0030] In the early stage of use, plant mulch has a certain strength and flexibility. After seasons of use, after completing its functional tasks, the plant mulch can be easily decomposed naturally through wind and sun, and become plant fertilizer and integrated into the soil, completing the life cycle of a relatively perfect mulch product that is harmless to the ecological environment and crops.

[0031] (IV) Technical analysis of plant mulch: 1. Machine rolling: Before mechanical rolling, the plant fragments at the machine's feed port are evenly mixed, scattered and intertwined, and have a certain thickness. When the machine rolls, the plant fragments are evenly mixed and intertwined. After rolling, they will form a sheet structure with a certain "discrete" distribution and intertwined together, similar to "evenly distributed branches" pressed together.

[0032] 2. Plant structure fiber connection status: Because plants are "non-rigid structures", the indentations of plant stalks, plant roots, plant branches and leaves will form a "bite" state after being pressed, which is equivalent to the "chain", "welding", "hinge" and "teething" connection forms in mechanical structures. Its structure is also similar to the arrangement of paper fibers after ordinary paper is magnified.

[0033] 3. Gluing: During rolling and bonding of different layers, no harmful chemicals are added, and green natural plant adhesives are added or sprayed to improve the structural properties and tensile strength of the plant mulch.

[0034] 4. Combination: Plant fiber mulches of various sizes and densities can be used alone or in combination. For example, the arrangement of three layers of mulches is that the outer layer uses a coarse fiber (larger pieces) mulch structure to protect the entire mulch and provide support; the middle layer uses a fine fiber mulch structure to provide warmth and ventilation; the inner layer uses a coarse fiber (larger pieces) mulch to protect the middle layer and provide support.

[0035] 5. Raw material particle classification: The new type of natural plant mulch is characterized by the use of green natural plant straw, plant roots, plant branches and leaves, etc., which are sorted, crushed (crushed to a certain particle size), and evenly mixed, and then automatically screened by a machine to separate larger pieces of raw materials and smaller pieces of raw materials. They can also be subdivided into ① large pieces, ② larger pieces, ③ medium pieces, ④ finer pieces, and ⑤ fine particles.

[0036] 6. Coarse structure plant fiber mulch: The large raw materials, relatively large raw materials and medium-sized raw materials automatically screened and separated by the machine are mixed separately and transported to a roller machine for rolling forming via a conveyor belt. The performance and specifications of the mulch film are controlled by adjusting parameters such as the temperature, pressure and speed of the roller machine to produce a curtain-like coarse-structured plant fiber mulch film with a certain width, different densities, equivalent to the thickness of a mat, and similar to a "window paper-cut" style.

[0037] 7. Fine structure plant fiber mulch: The finer raw materials and fine particle raw materials automatically screened and separated by the machine are transported to the roller via conveyor belts for rolling and forming. The performance and specifications of the mulch film are controlled by adjusting parameters such as the temperature, pressure and speed of the roller, and a finer structured plant fiber mulch film with a certain width, different densities, and a thickness equivalent to burlap cloth and similar to a "gauze" style is made.

[0038] 8. Combination method: Plant fiber mulches of different raw material sizes (block sizes) can be used separately or in any combination as needed. For example, the combination of nine layers of plant mulches is, from outside to inside: ① large blocks, ② relatively large, ③ medium, ④ relatively fine, ⑤ fine particles, ④ relatively fine, ③ medium, ② relatively large, ① large blocks, that is, the large block particle structure of the outermost and innermost layers is similar to the frame of a "window", and the middle layers are dense structures with smaller particles, similar to the functions of "window paper-cuts", "window paper", "window glass" and other layers; other combinations can also be used, for example, the combination of three layers of plant mulches is, the first layer, that is, the outermost layer, is a mulch made of large blocks of raw materials ①, the second layer, that is, the middle layer, is a mulch made of fine particles ⑤, and the third layer, that is, the innermost layer, is a mulch made of large blocks of raw materials ①; or other combinations.

[0039] 9. Characteristics of plant mulch: The new plant mulch is green, environmentally friendly, healthy, and degradable. It has good air permeability, heat preservation, moisture retention, flexible mechanical properties, and sound insulation and noise reduction functions. It can replace plastic mulch products that are harmful to the ecological environment and crops.

[0040] In addition to being used as agricultural mulch, the various combined plant mulches can also be used for sound insulation, noise reduction and heat preservation in the fields of urban construction and road traffic.

[0041] The use of plant mulch can reduce harm to humans and pollution to the environment, and has broad market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 — Fig.14 The processing technology and experimental sample photos of the new type of environmentally friendly, healthy, degradable and harmless plant mulch made from the straw, roots, branches and leaves of green natural plants.

[0043] Supplementary explanation of the attached figures: For example, in order to make the plant mulch have both a certain supporting strength and a certain breathability and warmth-keeping effect, corn stalks, wheat stalks, rice stalks, reeds or hay, etc., can be crushed or cut into small pieces, and some of the stalks need to be processed into "coarse filaments" and "fine filaments". When mixed and used, the "short blocks" of the straw play a structural supporting role in the plant mulch, and the "woolly" straw after filamenting plays a filling role, that is, the "short blocks" of straw play a supporting role in the edges of the "windows" of the plant mulch structure, and the "woolly" straw after filamenting plays a filling role of "multi-layer window paper".

[0044] Figure 1 — Figure 7 This is a schematic diagram of the process flow of the new plant mulch production process.

[0045] Figure 1 For plant mulch process 1: prepare materials (corn stalks are shown in the picture).

[0046] Figure 2 For plant mulch process 2: straw conveyor belt and roller.

[0047] Figure 3 Process 3 for plant mulch: straw rolling process with point pressing structure.

[0048] Figure 3Supplementary explanation: After the plant material fragments and the flocculent straw are evenly mixed, they are rolled using a roller. The roller of the roller has a multi-distributed cylindrical structure similar to a "capless rivet". The function is to make each part of the plant film more fully compacted by point pressure. At the same time, each cylindrical structure similar to a "capless rivet" can also rotate slowly along its axis. After the plant film is evenly distributed by point pressure, top pressure or rotation pressure (similar to screwing), the plant straw and other materials are more densely "bite" or "teeth", the purpose is to increase the tight connection between the plant straws.

[0049] Figure 4 Process 4 for making plant mulch film: rolling process - rolling to shape the plant straw mulch film as a whole.

[0050] Figure 5 This is plant mulch process 5: schematic diagram of the processed coarse straw structure plant mulch.

[0051] Figure 6 This is plant mulch process 6: schematic diagram of the processed fine straw filament structure plant mulch.

[0052] Figure 7 This is plant mulch process 7: schematic diagram of the fine soft silk structure plant mulch after processing.

[0053] Figure 8 Photo of experimental samples of coarse straw structure plant mulch made of corn stalks, roots and leaves.

[0054] Fig. 9 This is a photo of the wheat straw plant mulch experimental sample.

[0055] Fig.10 This is a photo of the rice straw plant mulch experimental sample.

[0056] Fig.11 -- Fig.13 This is a schematic diagram of a mulch made of a mixture of various plant straws. The picture shows a sample of a mulch made of a mixture of corn straw, wheat straw, rice straw, hay and palm fiber.

[0057] Fig.11 Photo 1 of the experimental sample of the composite plant mulch (made from a mixture of corn straw, wheat straw, rice straw, hay and palm fiber, etc.) (unfolded structure).

[0058] Fig.12 Photo 2 of the experimental sample of the composite plant mulch (mixed from corn straw, wheat straw, rice straw, hay and palm fiber, etc.) (curled structure 1).

[0059] Fig.13Photo 3 (curled structure 2) of the experimental sample of the composite plant mulch (mixed from corn straw, wheat straw, rice straw, hay and palm fiber).

[0060] Fig.14 Schematic diagram of the rolling synthesis of multi-layer plant mulch.

[0061] Fig.14 Supplementary explanation: First, various plant straws are pressed into film substrates separately, and then the layers of substrates are combined and stacked together for pressing and forming, similar to the production method of "three-ply board" and "five-ply board" in wood processing, that is, two or more plant films are combined, stacked and pressed together to form a multi-layer plant film. According to actual needs, each layer of the film substrate can be made of a single plant straw raw material or a mixed plant straw raw material. When pressing multiple layers, auxiliary raw materials such as plant adhesives can be added. DETAILED DESCRIPTION

[0062] Example 1: Plant mulch made from corn stalks, roots, branches and leaves The preparation process of plant mulch made of corn stalks, roots, branches and leaves mainly includes the following steps: ①Raw material preparation Prepare the required various green natural plants, green natural plant adhesives and other auxiliary materials as needed.

[0063] ② Plant raw material sorting Green natural plants are classified and sorted according to different plant species and different plant structures (plant stalks, plant roots, plant branches and leaves, etc.).

[0064] ③ Plant crushing The sorted plants are classified and crushed according to different needs, and each different structure needs to be crushed separately according to the requirements of different fragment sizes and crushed to the required particle length.

[0065] ④Screen according to the size of different fragments According to different plants, different plant structures (straw, roots, branches and leaves, etc.), and different fragment lengths and sizes, machines are used to automatically screen and separate plant raw material fragments (blocks, particles, etc.) of different lengths and sizes, and store them in different plant raw material storage boxes.

[0066] ⑤Proportion of plant raw materials According to the different working conditions and conditions of using the mulch film, and in accordance with the proportions required by the performance requirements of the mulch film, plant raw materials with different mulch film performances are formulated.

[0067] ⑥Uniform mixing of plant raw materials Evenly mixed and proportioned plant material fragments with different mulch film properties.

[0068] ⑦Machine rolling The evenly mixed plant material fragments are sent to a rolling machine for even rolling and forming to form the basic layer of different types of plant mulch films.

[0069] ⑧Combination use Without adding any harmful chemicals, green natural plant adhesives can be added or sprayed to combine and bond different types of plant mulch basic layers together. The purpose is to improve the performance and tensile strength of the plant mulch to meet the performance requirements of the mulch under different climatic and geographical conditions.

[0070] ⑨Packaging, transportation, storage and sales The prepared plant mulch is bundled, packaged, transported to designated locations for storage, and sold.

[0071] ⑩The use of mulch in farmland and its post-processing a) Agricultural use of mulch: According to the climate, geographical location and other working conditions in different seasons, the required plant mulch is selected. Plant mulch has certain functions such as heat preservation (heat preservation performance of plant straw, etc.), moisture retention (preventing evaporation of surface water and absorbing condensed water in the air) and breathability; the plant fiber structure of plant mulch also has noise reduction functions such as sound absorption and sound insulation to protect the microorganisms under the mulch and on the surface from being harmed by various noises from the outside world.

[0072] b) Post-treatment of mulch film: Plant mulch is made of crushed green and natural plant straw, plant roots, plant leaves, etc. There are no overly long plant fibers in the raw materials. Although it is roll-formed, it does not form a similar "woven" structure. The purpose is to facilitate decomposition after the use period, so it does not have a large tensile strength, and the adhesive used is also a green and natural plant adhesive.

[0073] In the initial stage of use, the plant mulch has a certain strength and flexibility. After being used during the crop growing season, the plant mulch has completed its functional tasks. After being exposed to wind and sun, it is easy to decompose naturally and become plant fertilizer and integrate into the soil, completing a benign and relatively perfect product life cycle of the plant mulch that is harmless to the ecological environment and crops.

[0074] See attached for the processing process Figure 1 To Attachment Figure 7 , including Figure 5 Schematic diagram of the processed coarse straw structure plant mulch film, attached Figure 6 Schematic diagram of the processed fine straw soft silk structure plant mulch film, attached Figure 7Schematic diagram of the processed fine soft silk structure plant mulch.

[0075] Attached Figure 8 Photo of experimental samples of coarse straw structure plant mulch made of corn stalks, roots and leaves.

[0076] Attached Fig.11 Photo 1 of the experimental sample of the composite plant mulch (made from a mixture of corn straw, wheat straw, rice straw, hay and palm fiber, etc.) (unfolded structure).

[0077] Attached Fig.12 Photo 2 of the experimental sample of the composite plant mulch (mixed from corn straw, wheat straw, rice straw, hay and palm fiber, etc.) (curled structure 1).

[0078] Attached Fig.13 Photo 3 (curled structure 2) of the experimental sample of the composite plant mulch (mixed from corn straw, wheat straw, rice straw, hay and palm fiber).

[0079] Example 2: Wheat straw plant mulch The plant mulch film is made from wheat straw, and its processing and preparation process can refer to the technical method shown in Example 1, wherein the wheat straw can also be made into a coarse structure and a fine silk structure, and then mixed to make a plant mulch film. Fig. 9 Photo of experimental samples of plant mulch made from wheat straw.

[0080] Example 3: Rice Straw Plant Mulch The plant mulch film is made from rice straw, and its processing and preparation process can refer to the technical methods shown in Examples 1 and 2, wherein the rice straw can also be made into a coarse structure and a fine silk structure, and then mixed to make a plant mulch film. Fig.10 Photo of experimental samples of plant mulch made from rice straw.

[0081] Example 4: New plant mulch made from sorghum stalks, roots and leaves The processing and preparation process of the new plant mulch made from sorghum stalks, roots and leaves can refer to the technical methods shown in Examples 1 and 2.

[0082] Example 5: New plant mulch made of reed straw, reed leaves, etc. The processing and preparation process of the new plant mulch made of reed straw, reed leaves, etc. can refer to the technical methods shown in Examples 1 and 2.

[0083] Example 6: Combination use of new plant mulch films Plant fiber mulches of different raw material sizes (block sizes) can be used separately or in any combination as needed. For example, the combination of three-layer plant mulches is: the first layer, i.e., the outermost layer, is a mulch made of large blocks of raw materials ①, the second layer, i.e., the middle layer, is a mulch made of medium raw materials ③, and the third layer, i.e., the innermost layer, is a mulch made of finer raw materials ④; it can also be composed of nine layers, and the composition from outside to inside is: ① large blocks, ② relatively large, ③ medium, ④ relatively fine, ⑤ fine particles, ④ relatively fine, ③ medium, ② relatively large, ① large blocks; other combinations can also be used. Fig.14 Shown is a schematic diagram of the use method of the new plant mulch combination.

Claims

1. A new type of mulch film preparation technology method, characterized in that The ground film is made of green natural plants.

2. The ground film according to claim 1, characterized in that It uses plant straw, plant roots, plant leaves, etc., which are sorted, crushed (crushed to a certain particle length), and evenly mixed, and then automatically screened by a machine to separate larger and smaller pieces of raw materials. They can also be subdivided into ① large pieces, ② larger, ③ medium, ④ finer, ⑤ fine particle raw materials, etc.

3. The ground film according to claim 1 and 2, characterized in that It needs to be point pressed and rolled by the machine. ① Point pressed: the large pieces of raw materials, relatively large raw materials and medium-sized raw materials automatically screened and separated by the machine, as well as various types of straws that have been processed by silkening, are mixed and flattened, and then transported to the double-drum roller for rolling and point pressed through a conveyor belt, that is, after the plant raw material fragments and the flocculent straw after silkening are evenly mixed, the plant film needs to be rolled by a double-drum roller with multiple heads similar to "capless rivets" to make each part of the plant film more fully compacted. At the same time, each structure similar to "capless rivets" can also make slow rotational motion along its axis. After evenly distributed point pressure, top pressure or rotational pressure (similar to screwing screws), each plant straw and other materials can be more densely "bite" or "teeth" , the purpose is to increase the close connection between plant straws; ② Rolling: the plant mulch after point pressing by the machine is sent to the rolling machine for uniform rolling and forming to form the basic layer of different types of plant mulch films, (a) by adjusting the temperature, pressure and speed of the rolling machine and other parameters to control the performance and specifications of the mulch film, a curtain-like coarse structure plant fiber mulch with a certain width and different density, equivalent to the thickness of a "cool mat" and similar to the "window paper-cut" style is made; (b) by adjusting the temperature, pressure and speed of the rolling machine and other parameters to control the performance and specifications of the mulch film, a finer structure plant fiber mulch with a certain width and different density, equivalent to the "sack cloth" style and similar to the "gauze" or "window paper" style is made.

4. The ground film according to claims 1, 2 and 3, characterized in that During the machine point pressing and rolling process, gluing (spraying) is required. Without adding any harmful chemicals, green natural plant adhesives can be added or sprayed to combine and bond different types of plant mulch basic layers together. The purpose is to improve the structural properties and tensile strength of the plant mulch to meet the performance requirements of the mulch under different climatic and geographical conditions.

5. The ground film according to claims 1, 2, 3 and 4, characterized in that Plant fiber mulches of different raw material sizes (block sizes) can be used separately or in any combination as needed. For example, the combination of nine layers of plant mulches is, from outside to inside, ① large blocks, ② relatively large blocks, ③ medium blocks, ④ relatively fine blocks, ⑤ fine particles, ④ relatively fine blocks, ③ medium blocks, ② relatively large blocks, and ① large blocks, that is, the large block particle structure of the outermost and innermost layers is similar to the frame of a "window", and the middle layers are dense structures with smaller particles, similar to the functions of "window paper-cuts", "window paper", "window glass" and other layers; other combinations can also be used, for example, the combination of three layers of plant mulches is, the first layer, that is, the outermost layer, is a mulch made of large blocks of raw materials ①, the second layer, that is, the middle layer, is a mulch made of fine particles ⑤, and the third layer, that is, the innermost layer, is a mulch made of large blocks of raw materials ①; or other combinations can be used.

6. The ground film according to claims 1, 2, 3, 4 and 5, characterized in that The preparation process mainly includes the following steps: ① raw material preparation, ② raw material sorting, ③ crushing, ④ raw material size separation, ⑤ point pressing and rolling forming according to the size of the raw materials, and the subsequent work includes ⑥ packaging, transportation and storage, ⑦ sales, ⑧ farmland implementation, etc.

7. The ground film according to claims 1, 2, 3, 4, 5 and 6, characterized in that The new plant mulch is green, environmentally friendly, healthy, and degradable. It has the advantages of good air permeability, heat preservation, moisture retention, and flexible mechanical properties to protect the agricultural plant seedlings underneath the mulch. The new plant mulch can replace plastic mulch products that are harmful to the environment, ecology, and crops.

8. The ground film according to claims 1, 2, 3, 4, 5, 6 and 7, characterized in that The plant fiber structure of the new plant mulch also has noise reduction functions such as sound absorption and sound insulation, which can protect the microorganisms under the mulch and on the surface from being harmed by various external noises.

9. The ground film according to claims 1, 2, 3, 4, 5, 6, 7 and 8, characterized in that In addition to being used as agricultural mulch, the various combined plant mulches can also be used for sound insulation, noise reduction and heat preservation in the fields of urban construction and road traffic.

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