CN109575422A - The ecological degradative plastic film of Southwestern Shandong peanut - Google Patents
The ecological degradative plastic film of Southwestern Shandong peanut Download PDFInfo
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- CN109575422A CN109575422A CN201910111006.9A CN201910111006A CN109575422A CN 109575422 A CN109575422 A CN 109575422A CN 201910111006 A CN201910111006 A CN 201910111006A CN 109575422 A CN109575422 A CN 109575422A
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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
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
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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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- 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
- 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
- C08J2323/08—Copolymers of ethene
-
- 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
- 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
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
-
- 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
- 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
- C08J2423/02—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
- C08J2423/10—Homopolymers or copolymers of propene
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Environmental Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Soil Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Protection Of Plants (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The present invention provides a kind of Southwestern Shandong peanut ecological degradative plastic film, the ecological plastic matrix EBP-1603 of polyethylene and 1~6wt% including 94wt%~99wt%.The present invention is according to Southwestern Shandong climate characteristic, local peanut cultivation habit and Peanut Crop growth to temperature, the characteristics of demand of humidity, by selecting reasonable polyethylene raw material, ecological degradable master batch, scientific matching, the degradation induction period length of tailored version mulch is controlled, to adapt to the requirement of Southwestern Shandong Peanut Crop growth and development.Ecology degradative plastic film provided by the invention is conducive to the growth and development of peanut according to the Demand Design of local Peanut Crop growth and development, improves crop yield, and can reduce field operating procedure, reduces investment outlay, to improve income.
Description
Technical field
The invention belongs to degradative plastics technical field more particularly to a kind of ecological degradative plastic films of Southwestern Shandong peanut.
Background technique
Southwestern Shandong belongs to warm temperate zone monsoon climate, makes a clear distinction between the four seasons, and has abundant Luminous energy resource, average temperature of the whole year 13.3
DEG C -14.1 DEG C, 597-820 millimeters of average annual precipitation or so, gesture is high in the east and low in the west, cereal crops based on wheat, corn and rice,
Peanut is the most important industrial crops in this area, and wherein Jining City is the largest peanut species growing area, about 600,000 mu of cultivated area, always
180,000 tons of yield or so, it is mainly distributed on the East Hillsides mountain area such as Qufu, Surabaja and Zhou Cheng.Southwestern Shandong peanut cultivation is main
Based on spring sowing peanut, kind is based on the big fruit of plain edition；Level land in a manner of ridge culture based on, Ridged plant all carry out mulches cover
Lid, covering with ground sheeting area account for the 82% of peanut cultivation area up to 490,000 mu.According to investigations, this area's peanut seeding time generally collects
In by the end of April；Harvest time is generally by the end of August to mid-September.
Degradative plastic film is applied in peanut production, has Meteorological effect effect of increasing production similar with common ground film, can both send out
The production-increasing function that heats of common ground film is waved, and can save and manually pick up film recruitment, moreover it is possible to effectively peanut vine be developed, be used for
Cattle and sheep etc. are fed, can more prevent mulch from remaining the environmental pollution caused by soil.Therefore, degradative membrane has very wide popularization
Application prospect.Currently, degradative plastic film in the market is with mainly having photodegradation film, Biodegradable mulch and light/bio-degradable
Film and ecological degradative plastic film several types.
Photodegradation film is to introduce light enhanced sensitivity group in high molecular polymer or photosensitive material is added, and is absorbing it
A kind of mulch for causing photochemical reaction after solar ultraviolet light and macromolecular chain fracture being made to become low molecular mass compound.Light drop
Solution mulch is divided into addition type photodegradation film and synthetic photodegradative mulch two major classes.The degradation of photodegradation film is mainly mulch
In ultraviolet light of the sensitiser absorption in sunlight under the synergistic effect of other auxiliary agents cause photooxidation reaction, gather
Ethylene molecule chain starts to be broken, and mulch becomes fragile, physical mechanical property decline, last fracture and disappearance.But light degradation
There is also deficiencies for film: first is that the restriction that degradation is illuminated by the light the factors such as intensity, geographical environment, season climate, variety of crops is larger.
Degradation rate is difficult to accurately control；Second is that crop field covering is in use, the part in placing into the soil cannot be degraded.And it is decomposed
Object to atmosphere, water quality, whether soil generates secondary pollution is still not clear, therefore its application is restricted.
Biodegradable mulch is a kind of ground degraded by the vital movement of edaphon under field conditions (factors)
Film.Biodegradable mulch is divided into the polymer-based mulch of chemical synthesis, natural polymer base film two major classes；In terms of mechanism of degradation,
Biodegradable mulch can be divided into endless whole life cycle design and fully biodegradable mulch again.Wherein, not exclusively biology drops
Solution mulch refers to be mixed into a certain amount of (10%-30%) and is had in general-purpose plastics (PE, PV, PVC etc.) by blending or grafting
The substance of biological degradability；Fully biodegradable mulch is used using the function of middle holding and existing plastics same degree
After can be the microbial action breaks such as bacterium, fungi, seaweed in nature into low molecular compound, and be ultimately breaks down into water and two
The high molecular material of the inorganic matters such as carbonoxide.Although this kind of mulch can degrade, all there are processing difficulties, mechanical property and resistance to
Aqueous problem that can be poor, is difficult to promotion and application at present.
Light/life Shuangjing county is that photosensitizer, autoxidator, antioxidant are added in commodity polymer material (such as PE)
A kind of mulch being made with the biodegradable auxiliary agent etc. as microbiological culture media.The characteristics of light/life Shuangjing county is
Plastic-film disintegration at little particle, too apparent negative effect is not had to plant growth in a short time, but with using the time
Extend, plastic grain gradually increases in soil, will affect the growth or even the underproduction of crop root.In addition, the plastics after degradation are small
Particle can not be removed by artificial means, be unfavorable for the sustainable development of agricultural.
Ecological degradative plastic film technology is the degradative plastics technology with the leading level in the world.The technology be by the U.S.,
Canada, Australia, tens place chemistry, materialogy, environmentology, agrology and the biology of the well-known universities and colleges of Japan and the country etc.
The doctor of profession makes great efforts the achievement developed after the several years.The core of the technology is that be changed into conventional plastic can rapid and natural point
The environment-friendly material of solution passes through oxidation under the action of the factors such as natural environment light abundant, heat, oxygen and microorganism first
Macromolecular in plastics is become small molecule by degradation, then by it is biodegradable by plastic molecules be converted into carbon dioxide, water and
Organic matter returns the ecosphere and is recycled, to fundamentally solve the problems, such as " white pollution ".
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of Southwestern Shandong peanut ecological degradative plastic film, the present invention
When the ecological degradative plastic film of offer is for Southwestern Shandong plantation peanut, it can be obviously promoted the growth of peanut, improve peanut
All kinds of fruits weight and Pod Yield, and can degrade, soil texture will not be damaged.
The present invention provides a kind of Southwestern Shandong peanuts with ecological degradative plastic film, the poly- second including 94wt%~99wt%
The ecological plastic matrix EBP-1603 of alkene and 1~6wt%.Wherein, EBP-1603 is ecological plastic matrix, purchased from the strong ring in Shandong day
Protect Co., Ltd.
The present invention according to Southwestern Shandong climate characteristic, local peanut cultivation habit and Peanut Crop growth to temperature,
The characteristics of demand of humidity, by selecting reasonable polyethylene raw material, ecological degradable master batch, scientific matching controls tailored version mulch
Degradation induction period length, to adapt to the requirement of Southwestern Shandong Peanut Crop growth and development.Ecology degradation provided by the invention
Mulch is conducive to the growth and development of peanut according to the Demand Design of local Peanut Crop growth and development, improves crop yield, and energy
Field operating procedure is enough reduced, is reduced investment outlay, to improve income.
In one embodiment, the polyethylene is selected from linear low density polyethylene.
In one embodiment, the ecological plastic matrix EBP-1603 of the polyethylene including 97wt% and 3wt%.
In one embodiment, the ecological plastic matrix EBP-1603 of the polyethylene including 96wt% and 4wt%.
It in one embodiment, further include accounting for polyethylene and ecological plastic matrix EBP-1603 total amount 3wt%~8wt%
Black master batch.
In one embodiment, width is 700mm~1200mm, preferably 900mm；With a thickness of 0.004mm~
0.008mm, preferably 0.004mm.
The present invention is not particularly limited the preparation method of the ecological degradative plastic film, the preparation of fief film inflation film manufacturing machine.
The application method of ecology degradative plastic film provided by the invention is as follows, i.e. the planting patterns of peanut is as follows:
Fine site preparation is the basis of plastic film mulching cultivation stable high yield, and rake drag soil moisture conservation in time, reaches soil nothing fine crushing after ploughing
Clod, Land leveling are without root stubble.Whole organic fertilizers and 2/3 chemical fertilizer in early spring in conjunction with plough, applied in 20~30cm soil layer deeply,
The chemical fertilizer of residue 1/3 is spread fertilizer over the fields on the ground before peanut ridging, and is wrapped and applied in ridge.Seed broadcasts before shell first band shell and basks seeds 2~3
It, carries out classification grain-by-grain seed selection to seed after broadcasting shell, selects level-one to be good for rice and plants.Spring Peanut has to fertilizer spraying, it is ensured that seed sprouting
The demand of phase and Seedling Stage to moisture.It can be used the soil moisture conservation of first ridging overlay film, when optimum period punches the planting patterns of sowing on film.?
The kind ditch of two depth 3cm is opened on ridge, for the ditch heart away from 10~12cm of ridge side, soil moisture content is slightly worse, first a small amount of water can be poured along ditch, to seep under water
Afterwards, simultaneously grain lays flat 2 seeds, 16~19cm of hill spacing in every cave.Then bio-fertilizer or potassium dihydrogen phosphate and each 50~70kg/ of urea are applied
Hm2, immediately earthing.
Require ridge face flat when overlay film, ridge slope is steep, the compacting of film both sides, and ridge face mulch is non-wrinkled.In conditional situation, advocate
Mechanical film.Forbid when artificial overlay film or mechanical film to mulch laterally and longitudinally excessive tensile, to guarantee ecology degradation
Mulch meets peanut necessity overlay film phase, consistent with degradation induction period setting time.It carries out earthing on film and draws seedling cultivation, overlay film
Afterwards, it takes soil to cover the mound of thickness 5cm above sowing row out of furrow, rises to film surface or more, Miao Qianru to draw a liter peanut cotylcdon section
Rain is met, mound agglomeration should be arranged in time, eliminate agglomeration.
The degradation induction period of ecology degradative plastic film provided by the invention is identical with the Southwestern Shandong peanut growth phase, no
When influencing the yield and economic benefit of peanut, and harvesting, peanut rice shoot is not wound, makes peanut rice shoot that can reprocess utilization, create
Make economic benefit.The experimental results showed that when ecology degradative plastic film provided by the invention is planted for Southwestern Shandong peanut tectorial,
Peanut yield be higher than not overlay film, cover common polythene film and cover photodegradation film.
Detailed description of the invention
Fig. 1 is that the ecological degradative plastic film that the embodiment of the present invention 1 provides is laid with photo；
Fig. 2 is the ecological degradative plastic film rupture event photo that the embodiment of the present invention 1 provides；
Fig. 3 is that the embodiment of the present invention 3 covers common polythene film and the ecological degradative plastic film of the preparation of embodiment 1 is received in peanut
Rupture event photo after obtaining.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1
Process equipment is the production of Laiwu in Shandong province Jing Rui plastics machinery Co., Ltd, screw diameter 45mm mulch blown film unit.
Using raw material be low density linear polyethylene (LLDPE), mass fraction 97%, ecological plastic matrix EBP-1603,
Mass fraction is 3%.
Process conditions:
Body temperature: 142 DEG C of an area, two 160 DEG C of areas, three 170 DEG C of areas, four 180 DEG C of areas, five 178 DEG C of areas, 171 DEG C of head.
Engine speed: 37 revs/min.
Product specification: thickness 0.004mm, width 900mm.
Embodiment 2
Process equipment is the production of Laiwu in Shandong province Jing Rui plastics machinery Co., Ltd, screw diameter 45mm mulch blown film unit.
Using raw material be low density linear polyethylene (LLDPE), mass fraction 96%, ecological plastic matrix EBP-1603,
Mass fraction is 4%.Black color masterbatch is the 6% of low density linear polyethylene and ecological plastic matrix EBP-1603.
Process conditions:
Body temperature: 140 DEG C of an area, two 160 DEG C of areas, three 170 DEG C of areas, four 180 DEG C of areas, five 180 DEG C of areas, 175 DEG C of head.
Engine speed: 37 revs/min.
Product specification: thickness 0.005mm, width 1000mm.
3 crop field Application Example of embodiment
Application type: ecological plastics prepared by setting common polythene mulch, photodegradation film, not overlay film and embodiment 1
Four kinds of cropping pattern processing such as mulch.
Application specification: 900mm*0.004mm*5kg
Application range: southwest in Shandong Province region Jining Zhou Cheng
Application effect: shown in as shown in Figure 1, Figure 2, Fig. 3, Tables 1 and 2, Fig. 1 is the ecology degradation that the embodiment of the present invention 1 provides
Mulch is laid with photo, and Fig. 2 is the ecological degradative plastic film rupture event photo that the embodiment of the present invention 1 provides, and Fig. 3 is that the present invention is implemented
The rupture event photo of ecological degradative plastic film prepared by the covering common polythene film of example 3 and embodiment 1 after harvesting peanut.
The dedicated ecological degradative plastic film degradation property evaluation of 1 Southwestern Shandong peanut of table
| Mulch type | Induction period (d) | Residual rate (%) | Elongation at break (%) |
| Common polythene film | -- | 99 | 310 |
| Photodegradation film | 120 | 76 | 167 |
| Embodiment 1 | 75 | 33 | 0 |
2 Southwestern Shandong ecology degradative plastic film of table covers peanut yield evaluation
Application effect appraisal:
1. ecology plastic film provided by the invention application effect in the plantation of southwest in Shandong Province peanut tectorial is good, can be fine
Meet Zaozhuang area cropping pattern, be suitable for mechanical plastic film mulch and artificial plastic film mulch.
2. ecology plastic film provided by the invention has no adverse effects to Jining Zhou Cheng area peanut growth and yield, can
Household economy benefit is ensured well.
3. it is provided by the invention ecology plastic film overcome existing for current other technologies it is non-degradable, degradation not exclusively,
Degrading, uncontrollable, price is high, causes secondary pollution problems, can after harvesting peanut fast degradation, not contaminated land, not dirty
Contaminate environment, not under the influence of season crop sow, be able to solve farmland white pollution, have very high economic benefit and social benefit.
4 crop field applicating evaluating of embodiment
Application type: ecology modeling prepared by setting common polythene mulch, Biodegradable mulch, not overlay film and embodiment 2
Expect four kinds of cropping pattern processing such as mulch.
Application specification: 1000mm*0.005mm*5kg
Application range: southwest in Shandong Province region Heze City
Application effect: as shown in the following table 3, table 4.
The dedicated ecological degradative plastic film degradation property evaluation of 3 Southwestern Shandong peanut of table
| Mulch type | Induction period (d) | Residual rate (%) | Elongation at break (%) |
| Common polythene film | -- | 99 | 410 |
| Biodegradable mulch | 28 | 0 | 0 |
| Embodiment 2 | 82 | 27 | 0 |
4 Southwestern Shandong ecology degradative plastic film of table covers peanut growing way and Yield evaluation
Application effect appraisal:
1. ecology plastic film provided by the invention is good in Heze Prefecture's application effect, the ecological plastic film feeds back in peasant household to be made
It is fully able to meet local demand with performance, and better than currently common mulch.
2. ecology plastic film provided by the invention data feedback during the application of Heze region, ecological plastic film application effect
Fruit is good, has good Meteorological effect performance, does not influence traditional cropping pattern, does not increase additional popularization cost.
3. ecology plastic film provided by the invention during the application of Heze region, does not influence the growth of area's peanut, produces
Amount and breeding time timing node can be good at the economic effect for ensureing peasant household.Peanut rice shoot after harvest can process work again
For animal feeding-stuff, increase household income again.
4. ecology plastic film provided by the invention starts to degrade, in peanut when peanut does not need mulch Meteorological effect
It degrades after harvest completely, to soil and environmental nonpollution, can be good at improving environment and soil property, there is good economic benefit
And social benefit.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of ecological degradative plastic film of Southwestern Shandong peanut, which is characterized in that the polyethylene including 94wt%~99wt%
With the ecological plastic matrix EBP-1603 of 1~6wt%.
2. ecology degradative plastic film according to claim 1, which is characterized in that the polyethylene is selected from linear low density polyethylene
Alkene.
3. ecology degradative plastic film according to claim 2, which is characterized in that polyethylene and 3wt% including 97wt%
Ecological plastic matrix EBP-1603.
4. ecology degradative plastic film according to claim 2, which is characterized in that polyethylene and 4wt% including 96wt%
Ecological plastic matrix EBP-1603.
5. ecological degradative plastic film described in any one according to claim 1~4, which is characterized in that further include account for polyethylene and
The black master batch of ecological plastic matrix EBP-1603 total amount 3wt%~8wt%.
6. ecological degradative plastic film described in any one according to claim 1~4, which is characterized in that width be 700mm~
1200mm, with a thickness of 0.004mm~0.008mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111006.9A CN109575422A (en) | 2019-02-12 | 2019-02-12 | The ecological degradative plastic film of Southwestern Shandong peanut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910111006.9A CN109575422A (en) | 2019-02-12 | 2019-02-12 | The ecological degradative plastic film of Southwestern Shandong peanut |
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| Publication Number | Publication Date |
|---|---|
| CN109575422A true CN109575422A (en) | 2019-04-05 |
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| CN201910111006.9A Withdrawn CN109575422A (en) | 2019-02-12 | 2019-02-12 | The ecological degradative plastic film of Southwestern Shandong peanut |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643100A (en) * | 2019-10-18 | 2020-01-03 | 河南省银丰塑料有限公司 | Special green mulching film for peanuts and preparation method thereof |
-
2019
- 2019-02-12 CN CN201910111006.9A patent/CN109575422A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643100A (en) * | 2019-10-18 | 2020-01-03 | 河南省银丰塑料有限公司 | Special green mulching film for peanuts and preparation method thereof |
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Application publication date: 20190405 |