CN112335472A - Method for manufacturing degradable mulching film for crops - Google Patents

Method for manufacturing degradable mulching film for crops Download PDF

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Publication number
CN112335472A
CN112335472A CN202011235877.0A CN202011235877A CN112335472A CN 112335472 A CN112335472 A CN 112335472A CN 202011235877 A CN202011235877 A CN 202011235877A CN 112335472 A CN112335472 A CN 112335472A
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China
Prior art keywords
parts
crops
mulching film
friendly
protective layer
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Pending
Application number
CN202011235877.0A
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Chinese (zh)
Inventor
阮刘文
杨文军
朱智勇
周勇军
许冬
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Henan Longdu Tianren Biology Material Co ltd
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Henan Longdu Tianren Biology Material Co ltd
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Priority to CN202011235877.0A priority Critical patent/CN112335472A/en
Publication of CN112335472A publication Critical patent/CN112335472A/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protecting plants
    • A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
    • A01G13/0256—Ground coverings
    • A01G13/0268—Mats or sheets, e.g. nets or fabrics
    • A01G13/0275—Films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2300/00—Characterised by the use of unspecified polymers
    • C08J2300/14—Water soluble or water swellable polymers, e.g. aqueous gels
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2397/00—Characterised by the use of lignin-containing materials
    • C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
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    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08K2003/2241—Titanium dioxide
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    • C08K3/24—Acids; Salts thereof
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    • C08K2003/262—Alkali metal carbonates
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming

Abstract

The invention discloses a manufacturing method of a degradable mulching film for crops, which comprises a degradation layer and an antiviral protective layer, wherein the degradation layer and the antiviral protective layer are tightly attached, and the antiviral protective layer is tightly attached to the ground. After the crops are mature, the mulching film does not need to be manually recycled, can be covered with the ground through the soil turning machine, can be automatically decomposed without influencing the next planting of the crops, has no damage to the soil, can have an inactivation effect on bacteria and weeds in the soil, improves the soil characteristics, and improves the yield and the quality of the crops.

Description

Method for manufacturing degradable mulching film for crops
Technical Field
The invention relates to the technical field of degradable materials, in particular to a manufacturing method of a degradable mulching film for crops.
Background
The biodegradable mulching film refers to a plastic mulching film which can be degraded under the action of microorganisms under natural environment conditions. After the plastic film is eroded by the microbial paste of bacteria, fungi and actinomycetes, the polymer component is hydrolyzed, ionized or protonated by the growth of cells, and is mechanically destroyed and split into oligomer fragments. Enzymes secreted by fungi or bacteria break down or oxidatively degrade water soluble polymers into water soluble fragments, generating new small molecule compounds, until finally breaking down or carbon dioxide and water.
The biodegradable mulching film is one kind of new ground covering film, and is used mainly in ground covering to raise soil temperature, maintain soil moisture, maintain soil structure and prevent pest from attacking crop and some microbe caused diseases, so as to promote plant growth
The existing biodegradable mulching film has the following defects: (1) once the biodegradable mulching film is used, weeds below the biodegradable mulching film cannot be cleaned, otherwise, the mulching film is damaged, and the growth of plants is influenced; (2) after the mulching film is used, the fertilizer cannot be applied and the bactericide cannot be sprayed, so that the diseases and insect pests are bred, and the crop dysplasia is caused.
Disclosure of Invention
The invention aims to provide a method for manufacturing a degradable mulching film for crops, which mainly solves the problem that the fertilizer cannot be applied and the weed cannot be removed after the film is coated on the ground surface.
In order to achieve the purpose, the invention provides the following technical scheme: the anti-virus protective layer comprises a degradation layer 1 and an anti-virus protective layer 2, wherein the degradation layer 1 and the anti-virus protective layer 2 are tightly attached to each other, and the anti-virus protective layer 2 is tightly attached to the ground.
Further, degradation layer 1 includes polylactic acid, low-pressure polyethylene resin, environmental protection instant glue, natural environmental protection resin and titanium dioxide powder, polylactic acid, low-pressure polyethylene resin, environmental protection instant glue, natural environmental protection resin and titanium dioxide powder each component content is: 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder.
Further, the anti-virus protective layer 2 comprises plant straw fiber, tefurazoline bactericide, a soil treatment agent and plant ash, wherein the plant straw fiber, the tefurine bactericide, the soil treatment agent and the plant ash comprise the following components in percentage by weight: 10-15 parts of plant straw fiber, 8-15 parts of tefurazolin bactericide, 9-18 parts of soil treatment agent and 4-8 parts of plant ash.
Further, the plant straw fiber is any one of wheat straw, corn straw or rice straw.
Further, the method comprises the following steps: the method comprises the following steps: taking 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder, uniformly mixing the polylactic acid, the low-pressure polyethylene resin, the environment-friendly instant glue, the natural environment-friendly resin and the titanium dioxide powder by using a mixing machine, placing the mixed raw materials into an extruding machine, adding an adhesive, extruding and molding to prepare a degradation layer, and then rolling the degradation layer by using a rolling machine for later use; step two: taking 10-15 parts of the plant straw fiber, 8-15 parts of the tefurazoline bactericide, 9-18 parts of the soil treatment agent and 4-8 parts of the plant ash, then placing the plant straw fiber, the tefurazoline bactericide, the soil treatment agent and the plant ash into a mixer to be uniformly mixed, then putting the mixed raw materials into an extruding machine, adding an adhesive to prepare an antiviral protective layer, and then rolling the antiviral protective layer by a rolling machine for later use; step three: the prepared degradation layer 1 and the prepared anti-virus protective layer 2 are rapidly attached by using an attaching machine, and then are rolled by using a rolling machine.
Further, in the first step, the mixing time of the mixer is 15-20 minutes, and the temperature of the extruding machine is controlled to be 50-120 ℃.
Further, in the second step, the mixing time of the mixer is 8-16 minutes, and the temperature of the extruding machine is controlled to be 50-120 ℃.
Furthermore, the pasting time of the laminator in the third step is 10-30 m/min, and the temperature of the laminator is controlled at 50-120 ℃.
The invention has the beneficial effects that: according to the manufacturing method of the degradable mulching film for crops, the degradable layer 1 is tightly attached to the antiviral protective layer 2, the antiviral protective layer is tightly attached to the ground, and nutrient components rich in the antiviral protective layer 2 can act on the ground surface and penetrate into soil; after crops are mature, the mulching film does not need to be manually recycled, the mulching film can be covered underground through a soil turning machine, the mulching film is automatically decomposed into carbon dioxide and water, the next planting of the crops is not influenced, the soil is not damaged, the environment-friendly effect is realized, and meanwhile, after the mulching film is laid, the quickly-degraded mulching film layer can be quickly degraded; the protective layer rich in the bactericide, the soil treatment agent and the plant ash can improve the acid-base property of the soil, so that the soil is rich in fertility and is suitable for plant growth; other benefits of this patent are further illustrated in the following examples.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
illustration of the drawings: 1. a degradation layer 2 and an antivirus protective layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
With reference to the attached drawing 1, the manufacturing method of the degradable mulching film for the crops comprises a degradation layer and an antiviral protective layer, wherein the degradation layer and the antiviral protective layer are tightly attached, and the antiviral protective layer is tightly attached to the ground. The degradation layer comprises polylactic acid, low-pressure polyethylene resin, environment-friendly instant glue, natural environment-friendly resin and titanium dioxide powder, wherein the polylactic acid, the low-pressure polyethylene resin, the environment-friendly instant glue, the natural environment-friendly resin and the titanium dioxide powder comprise the following components in percentage by weight: 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder. The anti-virus protective layer comprises plant straw fiber, tefurazoline bactericide, a soil treatment agent and plant ash, wherein the plant straw fiber, the tefurazoline bactericide, the soil treatment agent and the plant ash comprise the following components in percentage by weight: 10-15 parts of plant straw fiber, 8-15 parts of tefurazolin bactericide, 9-18 parts of soil treatment agent and 4-8 parts of plant ash. The method comprises the following steps: taking 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder, uniformly mixing the polylactic acid, the low-pressure polyethylene resin, the environment-friendly instant glue, the natural environment-friendly resin and the titanium dioxide powder by using a mixing machine, placing the mixed raw materials into an extruding machine, adding an adhesive, extruding and molding to prepare a degradation layer, and then rolling the degradation layer by using a rolling machine for later use; step two: taking 10-15 parts of the plant straw fiber, 8-15 parts of the tefurazoline bactericide, 9-18 parts of the soil treatment agent and 4-8 parts of the plant ash, then placing the plant straw fiber, the tefurazoline bactericide, the soil treatment agent and the plant ash into a mixer to be uniformly mixed, then putting the mixed raw materials into an extruding machine, adding an adhesive to prepare an antiviral protective layer, and then rolling the antiviral protective layer by a rolling machine for later use; after the crops are harvested, the mulching film is buried in the soil through the soil turning machine, and the degradable mulching film can be completely degraded within 40-60 days under the action of polylactic acid.
It should be noted that, in the above examples, tefurazoline is a sterol demethylation inhibitor, and is a systemic fungicide having protective and therapeutic effects. Has good quick action and durability, strong permeability and low use concentration. The invention has the advantages that the pollution to crops and environment is small under the normal use technical condition, the sterilization effect can play a good role in the early stage of disease occurrence or the spread of the disease occurrence, the sterilization effect of the invention is accompanied with the growth period of the crops, the crops are comprehensively protected from growing, the sterilization effect is divided into three steps in the growth process, the sterilization effect is slow in the initial stage of film covering, the components in the film in the middle stage of the crop growth are excited, the sterilization effect is fast, and the sterilization effect is slow in the later stage of the crop growth.
The soil treatment agent with the function can be applied by adopting a spraying method, a watering method and a poison method, and can also be mixed with other materials to kill weeds from the source.
The mulching film can improve the soil temperature, keep a loose and ventilated state, promote seeds to sprout in advance, grow seedlings in order and strong, has high seedling rate, can improve the vitality of leaves, prevent early leaf fall, enhance photosynthesis and promote flowers and fruits to be beautiful and gorgeous.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, the present invention is described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (8)

1. A degradable mulching film for crops is characterized in that: the anti-virus protective layer is tightly attached to the degradable layer, and the anti-virus protective layer is tightly attached to the ground.
2. The degradable mulching film for crops as claimed in claim 1, wherein: the degradation layer comprises polylactic acid, low-pressure polyethylene resin, environment-friendly instant glue, natural environment-friendly resin and titanium dioxide powder, wherein the polylactic acid, the low-pressure polyethylene resin, the environment-friendly instant glue, the natural environment-friendly resin and the titanium dioxide powder comprise the following components in percentage by weight: 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder.
3. The degradable mulching film for crops as claimed in claim 2, wherein: the anti-virus protective layer comprises plant straw fiber, tefurazoline bactericide, a soil treatment agent and plant ash, wherein the plant straw fiber, the tefurazoline bactericide, the soil treatment agent and the plant ash comprise the following components in percentage by weight: 10-15 parts of plant straw fiber, 8-15 parts of tefurazolin bactericide, 9-18 parts of soil treatment agent and 4-8 parts of plant ash.
4. A degradable mulch film for crops as claimed in claim 3 wherein: the plant straw fiber is any one of wheat straw, corn straw or rice straw.
5. The method for manufacturing the degradable mulching film for the crops as claimed in claim 4, wherein: the method comprises the following steps:
the method comprises the following steps: taking 15-25 parts of polylactic acid, 15-25 parts of low-pressure polyethylene resin, 15-20 parts of environment-friendly instant glue, 10-15 parts of natural environment-friendly resin and 4-8 parts of titanium dioxide powder, uniformly mixing the polylactic acid, the low-pressure polyethylene resin, the environment-friendly instant glue, the natural environment-friendly resin and the titanium dioxide powder by using a mixing machine, placing the mixed raw materials into an extruding machine, adding an adhesive, extruding and molding to prepare a degradation layer, and then rolling the degradation layer by using a rolling machine for later use;
step two: taking 10-15 parts of the plant straw fiber, 8-15 parts of the tefurazoline bactericide, 9-18 parts of the soil treatment agent and 4-8 parts of the plant ash, then placing the plant straw fiber, the tefurazoline bactericide, the soil treatment agent and the plant ash into a mixer to be uniformly mixed, then putting the mixed raw materials into an extruding machine, adding an adhesive to prepare an antiviral protective layer, and then rolling the antiviral protective layer by a rolling machine for later use;
step three: and rapidly laminating the prepared degradation layer and the prepared antiviral protective layer by using a laminating machine, and rolling by using a rolling machine.
6. The method for manufacturing the degradable mulching film for the crops as claimed in claim 5, wherein: in the first step, the mixing time of the mixer is 15-20 minutes, and the temperature of the extruding machine is controlled to be 50-120 ℃.
7. The method for manufacturing the degradable mulching film for the crops as claimed in claim 6, wherein: in the second step, the mixing time of the mixer is 8-16 minutes, and the temperature of the extruding machine is controlled to be 50-120 ℃.
8. The method for manufacturing the degradable mulching film for the crops as claimed in claim 7, wherein: in the third step, the pasting time of the laminating machine is 10-30 m/min, and the temperature of the laminating machine is controlled at 50-120 ℃.
CN202011235877.0A 2020-11-05 2020-11-05 Method for manufacturing degradable mulching film for crops Pending CN112335472A (en)

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CN104742459A (en) * 2015-03-30 2015-07-01 贵州明球兴发农业科技有限公司 Insect-prevention wood-prevention degradable environment-friendly mulching film
CN105272587A (en) * 2015-10-22 2016-01-27 尹国华 Multifunctional degradable plastic mulching film
CN109429841A (en) * 2018-11-16 2019-03-08 山东隆昌塑业有限公司 A kind of degradable mulch and preparation method thereof adapting to varying environment
EP3469888A1 (en) * 2017-10-10 2019-04-17 Artinova Speciality Papers AB Biodegradable mulching film
CN110786195A (en) * 2019-11-20 2020-02-14 中国热带农业科学院农产品加工研究所 Degradable covering material with biological insect prevention function

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6828887A (en) * 1986-08-06 1988-02-11 Sumitomo Chemical Company, Limited Mulching film for repelling insect pests
KR20050103546A (en) * 2004-04-26 2005-11-01 수원대학교 산학협력단 Polyethylene mulching film having insecticidal and weeding effect, and degradation
CN104742459A (en) * 2015-03-30 2015-07-01 贵州明球兴发农业科技有限公司 Insect-prevention wood-prevention degradable environment-friendly mulching film
CN105272587A (en) * 2015-10-22 2016-01-27 尹国华 Multifunctional degradable plastic mulching film
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