CN115491126A - Degradable liquid mulching film prepared by enzymolysis of lignite - Google Patents
Degradable liquid mulching film prepared by enzymolysis of lignite Download PDFInfo
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- CN115491126A CN115491126A CN202211303906.1A CN202211303906A CN115491126A CN 115491126 A CN115491126 A CN 115491126A CN 202211303906 A CN202211303906 A CN 202211303906A CN 115491126 A CN115491126 A CN 115491126A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D197/00—Coating compositions based on lignin-containing materials
- C09D197/005—Lignin
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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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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D105/00—Coating compositions based on polysaccharides or on their derivatives, not provided for in groups C09D101/00 or C09D103/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- 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
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Abstract
The invention relates to the technical field of agricultural application, and provides a degradable liquid mulching film prepared by hydrolyzing lignite with enzyme, which comprises the following raw materials in parts by weight: 85 to 90 parts of deionized water, 5 to 10 parts of zymolytic lignite, 5 to 8 parts of guar gum emulsion, 3 to 5 parts of polylactic acid, 2.5 to 3.5 parts of glycerol and 1 to 2.5 parts of polyvinyl alcohol. Through the technical scheme, the problems that the mulching film is difficult to degrade, the tensile strength is low and the effect of promoting the growth of crops is limited in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of agricultural application, in particular to a degradable liquid mulching film prepared by hydrolyzing lignite with enzyme.
Background
The mulching film, namely the ground covering film, can meet the requirements of soil moisture conservation, heat preservation and fertility preservation of crops when being used for cultivating the crops, prevent pests from attacking the crops and diseases caused by certain microorganisms, and promote the yield and income increase of the crops. Although the seedling culture medium looks thin and thin, the effect is quite large, the soil temperature, water retention, soil and fertilizer retention and fertilizer efficiency can be improved, and the seedling culture medium has multiple functions of weed control, disease and insect prevention, drought and waterlogging resistance, salt inhibition and seedling protection, improvement of ground photo-thermal conditions, sanitation and cleanness of products and the like, and also has the effects of root protection and growth promotion for seedlings just emerging. Generally, the raw material of the plastic film is basically polyvinyl chloride or polyethylene, the film cultivation can cover a large amount of plastic film in the field, the fertilizer efficiency can be improved, the growth of crops can be promoted, the effect is limited, the film can remain in the soil after the crops are harvested, however, the plastic film made of polyvinyl chloride or polyethylene has low strength, is easy to break and more importantly cannot be degraded, the recovery rate of the residual film is low along with the prolonging of the cultivation period of the film covering, the amount of the residual film in the soil is gradually increased, and the serious 'white pollution' is caused to the soil. Therefore, it is an urgent need to solve the problem of providing a degradable mulching film with high tensile strength for promoting crop growth.
Disclosure of Invention
The invention provides a degradable liquid mulching film prepared by enzymatic hydrolysis of lignite, which solves the problems of difficult degradation, low tensile strength and limited crop growth promoting effect of the mulching film in the related technology.
The technical scheme of the invention is as follows:
a degradable liquid mulching film prepared by lignite containing enzyme hydrolysis comprises the following raw materials in parts by weight: 85-90 parts of deionized water, 5-10 parts of enzymolysis lignite, 5-8 parts of guar gum emulsion, 3-5 parts of polylactic acid, 2.5-3.5 parts of glycerol and 1-2.5 parts of polyvinyl alcohol.
As a further technical scheme, the enzymatic hydrolysis lignite is prepared by the following method: crushing and sieving the raw lignite powder, mixing the crushed and sieved raw lignite powder with an enzymolysis solution, introducing oxygen for enzymolysis, drying and crushing the mixture after the enzymolysis is finished, and thus obtaining the enzymolysis lignite.
As a further technical scheme, the enzymolysis solution is prepared by mixing urea, sodium chloride, glucose, polyglutamic acid, peptone, bacillus subtilis and water according to the mass ratio of 1 (2-3) to 5 (5-7) to 5 (7-9) to 0.005.
According to a further technical scheme, the enzymolysis solution is prepared by mixing urea, sodium chloride, glucose, polyglutamic acid, peptone, bacillus subtilis and water in a mass ratio of 1.
As a further technical scheme, the mass ratio of the raw lignite to the enzymolysis solution is 7.
As a further technical scheme, the temperature is 40-50 ℃, the pressure is 0.1-0.3 MPa, and the time is 7-14 days during enzymolysis.
As a further technical scheme, the guar gum emulsion is prepared by the following method: mixing dipotassium hydrogen phosphate, monopotassium phosphate and deionized water, heating, adding guar gum powder while stirring, continuously stirring uniformly, adding molasses dry powder, and stirring uniformly again to obtain guar gum emulsion.
As a further technical scheme, the mass ratio of the dipotassium phosphate, the monopotassium phosphate, the deionized water, the guar gum powder and the molasses dry powder is (2-5).
As a further technical scheme, the temperature is raised to 40-60 ℃.
The invention also provides a preparation method of the degradable liquid mulching film prepared by the lignite containing the enzyme hydrolysis, which comprises the following steps: sequentially mixing and stirring deionized water, enzymolysis lignite, guar gum emulsion, polylactic acid and glycerol, adding polyvinyl alcohol, continuously stirring, and standing to obtain the liquid mulching film.
As a further technical scheme, deionized water, enzymolyzed lignite, guar gum emulsion, polylactic acid and glycerol are sequentially mixed and stirred for 20min, polyvinyl alcohol is added, stirring is continued for 10min, and standing is carried out for 15min to obtain the liquid mulching film.
As a further technical scheme, the stirring temperature is 40-50 ℃, and the rotating speed is 1000rpm.
As a further technical scheme, the degradable liquid mulching film prepared by the method can be used as a mulching film for crops.
The working principle and the beneficial effects of the invention are as follows:
1. the degradable liquid mulching film prepared by using the lignite containing the enzyme has ecological degradability and no toxicity, is in a liquid state before use, is uniformly sprayed on the surface of soil when in use, connects soil particles together to form a special soil film structure, has the functions of keeping the temperature of the soil, the humidity of the soil and the like, and has the effect of increasing the fertilizer efficiency of the soil. Meanwhile, the polylactic acid is used as a degradation catalyst, has high degradation speed, ensures that the polylactic acid is degraded along with the extension of time after the solid mulching film is formed, can be completely degraded in soil, cannot generate harmful gas, and prevents white plastic pollution.
2. On one hand, guar gum is dissolved in water to form a colloidal substance, and an auxiliary agent with high tensile strength and good moisturizing and heat insulating effects is compounded in the guar gum solution, so that under the condition of ensuring that the property of the guar gum is not changed, hydroxyl in glycerol molecules is combined with water molecules, the tensile strength can be improved, the tensile strength of the liquid mulching film is ensured, and the defects of the common plastic mulching film technology are overcome; on the other hand, the thickening agent is sprayed on the soil surface by utilizing the thickening property of the guar gum, can achieve the effect of rapid thickening, can permeate into soil gaps, is combined with soil clay minerals, forms a solid coagulation film between soil air interfaces along with the evaporation of water, and has good promotion effect on the growth and development of crops.
3. Humic acid is a natural organic matter and can be used as a fertilizer, a soil conditioner and a hormone required by plant growth. The invention utilizes a microbial dissolution method to extract humic acid, has mild reaction conditions, can clean conversion, and more importantly, the extracted humic acid is neutral in the liquid mulching film, can be better and uniformly mixed with guar gum emulsion, and has higher biological activity, stronger disease resistance, nematode resistance and stress resistance.
4. The molasses dry powder has acid-base resistance and oxidation resistance, can be well adapted to various soils after a liquid mulching film is formed, has strong chelating capacity for divalent cations, and is chelated with trace elements to form soluble organic mineral elements beneficial to absorption of plants. More importantly, the liquid mulching film can become plant nutrient substances after being degraded, and the more organic substances are accumulated along with the prolonging of the cultivation period, the better the soil fertility is.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a photograph of a front side of a liquid mulch potted corn;
FIG. 2 is a top view of a liquid mulch potted corn;
in the figures 1 and 2, a, b, c and d are photographs of the mulching film provided by the control group, the comparative example 3, the comparative example 2 and the example 1 and the potted corn respectively.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 inventive step, are intended to be within the scope of the present invention.
The enzymatic solutions in the following examples were prepared by the following method: mixing 10g of urea, 20g of sodium chloride, 50g of glucose, 50g of polyglutamic acid, 80g of peptone, 0.05g of bacillus subtilis and 200g of water to prepare an enzymolysis solution.
Example 1
S1, preparing enzymolysis lignite: crushing 700g of raw lignite by a crusher, sieving the crushed raw lignite by a sieve of 80 meshes, putting the crushed raw lignite and 300g of enzymolysis solution into a reaction kettle, introducing oxygen for enzymolysis, mixing the mixture at 40 ℃ and 0.1MPa for 7 days, taking out the mixture, drying the mixture, and crushing the mixture to obtain enzymolysis lignite;
s2, preparing guar gum emulsion: weighing 20g of dipotassium phosphate and 30g of monopotassium phosphate, adding 300mL of deionized water, heating to 40 ℃, starting stirring, slowly adding 50g of guar gum powder, stirring at the rotating speed of 1000rpm for 30min, then slowly adding 20g of molasses dry powder, and continuously stirring at the rotating speed of 1000rpm for 60min to form uniform guar gum emulsion;
s3, preparing a liquid mulching film: adding 85g of deionized water into a container, stirring at 40 ℃, sequentially adding 5g of zymolytic lignite, 5g of guar gum emulsion, 3g of polylactic acid and 2.5g of glycerol, stirring at the rotating speed of 1000rpm for 20min, finally adding 1g of polyvinyl alcohol, continuously stirring at the rotating speed of 1000rpm for 10min, and standing for 15min to obtain the liquid mulching film.
Example 2
S1, preparing enzymolysis lignite: crushing 700g of raw lignite by a crusher, sieving the crushed raw lignite by a sieve of 80 meshes, putting the crushed raw lignite and 300g of enzymolysis solution into a reaction kettle, introducing oxygen for enzymolysis, mixing the mixture at 50 ℃ and 0.2MPa for 10 days, taking out the mixture, drying the mixture, and crushing the mixture to obtain enzymolysis lignite;
s2, preparing guar gum emulsion: weighing 20g of dipotassium phosphate and 30g of monopotassium phosphate, adding 300mL of deionized water, heating to 50 ℃, opening stirring, slowly adding 50g of guar gum powder, stirring at the rotating speed of 1000rpm for 30min, then slowly adding 30g of molasses dry powder, and continuously stirring at the rotating speed of 1000rpm for 60min to form uniform guar gum emulsion.
S3, preparing a liquid mulching film: adding 90g of deionized water into a container, stirring at 50 ℃, sequentially adding 7g of enzymatic lignite, 6g of guar gum emulsion, 4g of polylactic acid and 3g of glycerol, stirring at the rotating speed of 1000rpm for 20min, finally adding 2.5g of polyvinyl alcohol, continuously stirring at the rotating speed of 1000rpm for 10min, and standing for 15min to obtain the liquid mulching film.
Example 3
S1, preparing enzymolysis lignite: crushing 700g of raw lignite by a crusher, sieving by a sieve of 80 meshes, putting the crushed raw lignite and 300g of enzymolysis solution in a reaction kettle, introducing oxygen for enzymolysis, mixing for 14 days at 50 ℃ and 0.3MPa, taking out the mixture, drying again, and crushing the mixture to obtain the enzymolysis lignite.
S2, preparing guar gum emulsion: weighing 20g of dipotassium phosphate and 30g of monopotassium phosphate, adding 300mL of deionized water, heating to 60 ℃, starting stirring, slowly adding 50g of guar gum powder, stirring at the rotating speed of 1000rpm for 30min, slowly adding 40g of molasses dry powder, and continuously stirring at the rotating speed of 1000rpm for 60min to form uniform guar gum emulsion.
S3, preparing a liquid mulching film: adding 90g of deionized water into a container, stirring at 50 ℃, sequentially adding 10g of zymolytic lignite, 8g of guar gum emulsion, 5g of polylactic acid and 3.5g of glycerol, stirring at the rotating speed of 1000rpm for 20min, finally adding 2.5g of polyvinyl alcohol, continuously stirring at the rotating speed of 1000rpm for 10min, and standing for 15min to obtain the liquid mulching film.
Example 4
S1, preparing enzymolysis lignite: crushing 700g of raw lignite by a crusher, sieving by a sieve of 80 meshes, putting the crushed raw lignite and 300g of enzymolysis solution in a reaction kettle, introducing oxygen for enzymolysis, mixing for 14 days at 45 ℃ and 0.3MPa, taking out the mixture, drying again, and crushing the mixture to obtain the enzymolysis lignite.
S2, preparing guar gum emulsion: weighing 20g of dipotassium phosphate and 30g of monopotassium phosphate, adding 300mL of deionized water, heating to 60 ℃, starting stirring, slowly adding 50g of guar gum powder, stirring at the rotating speed of 1000rpm for 30min, slowly adding 50g of molasses dry powder, and continuously stirring at the rotating speed of 1000rpm for 60min to form uniform guar gum emulsion.
S3, preparing a liquid mulching film: adding 85g of deionized water into a container, stirring at 50 ℃, sequentially adding 5g of zymolytic lignite, 8g of guar gum emulsion, 5g of polylactic acid and 3.5g of glycerol, stirring at the rotating speed of 1000rpm for 20min, finally adding 2.5g of polyvinyl alcohol, continuously stirring at the rotating speed of 1000rpm for 10min, and standing for 15min to obtain the liquid mulching film.
Example 5
S1, preparing enzymolysis lignite: crushing 700g of raw lignite by a crusher, sieving the crushed raw lignite by a sieve of 80 meshes, putting the crushed raw lignite and 300g of enzymolysis solution into a reaction kettle, introducing oxygen for enzymolysis, mixing the mixture at 40 ℃ and 0.3MPa for 10 days, taking out the mixture, drying the mixture again, and crushing the mixture to obtain the enzymolysis lignite.
S2, preparing guar gum emulsion: weighing 20g of dipotassium phosphate and 30g of monopotassium phosphate, adding 300mL of deionized water, heating to 50 ℃, starting stirring, slowly adding 50g of guar gum powder, stirring at the rotating speed of 1000rpm for 30min, slowly adding 50g of molasses dry powder, and continuously stirring at the rotating speed of 1000rpm for 60min to form uniform guar gum emulsion.
S3, preparing a liquid mulching film: adding 90g of deionized water into a container, stirring at 40 ℃, sequentially adding 10g of zymolytic lignite, 6g of guar gum emulsion, 5g of polylactic acid and 3.5g of glycerol, stirring at the rotating speed of 1000rpm for 20min, finally adding 2.5g of polyvinyl alcohol, continuously stirring at the rotating speed of 1000rpm for 10min, and standing for 15min to obtain the liquid mulching film.
Comparative example 1
The only difference from example 1 is that no glycerol was added to S3.
Comparative example 2
The only difference from example 1 is that no molasses dry powder was added to S2.
Comparative example 3
The PE plastic mulching film is purchased in the market.
And (3) testing the tensile strength: weighing 20g of the liquid mulching films provided in examples 1 to 5 and comparative example 1, pouring the liquid mulching films into a surface dish with the diameter of 10cm, uniformly diffusing the liquid mulching films to prepare a film, and then cutting the film into strips with the width of 2cm, referring to GB/T1040.3-2006 part 3 for measuring the tensile property of plastics: test conditions for films and sheets tensile strength was measured. The test results are recorded in table 1:
TABLE 1 tensile Strength of liquid mulch film
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | Comparative example 3 | |
| Tensile Strength (N. Cm) -2 ) | 22.15 | 23.56 | 24.89 | 27.25 | 24.13 | 10.18 | 21.69 |
As can be seen from Table 1, the tensile strength of the liquid mulching films provided in examples 1 to 5 of the present invention reached 22.15 N.cm -2 The material has excellent mechanical properties; comparative example 1 in which no glycerin was added, the tensile strength of the liquid mulching film provided was only 10.18N · cm -2 The mechanical property of the mulching film is far lower than that of the embodiment, and the hydroxyl in glycerol molecules can be combined with water molecules, so that the tensile strength of the liquid mulching film is improved; comparative example 3 the tensile strength of the PE plastic mulch film purchased in the market was lower than that of the examples, and therefore, the liquid mulch film provided by the present invention remedied the defect in mechanical properties of the common plastic mulch film.
In order to better illustrate the application effect of the degradable liquid mulching film prepared by hydrolyzing lignite on actual crops, the liquid mulching films provided by the example 1 and the comparative examples 2-3 are used for potted corn, the potted corn without the mulching film is used as a control group, the control group is placed in the same laboratory environment for comparison test, and the plant height and the leaf width of the corn are measured after 15 days. The test data is recorded in table 2:
TABLE 2 maize plant height and leaf Width
| Example 1 | Comparative example 2 | Comparative example 3 | Control group | |
| Average plant height (cm) | 26.8 | 25.4 | 21.5 | 18.4 |
| Average leaf width (cm) | 0.87 | 0.86 | 0.81 | 0.77 |
As can be seen from Table 2, when the liquid mulching film provided by the embodiment 1 of the invention is used for potted corn, the average plant height of the corn is 26.8cm, the average leaf width is 0.87cm, and the molasses dry powder is not added in the comparative example 2, when the provided liquid mulching film is used for potted corn, the average plant height of the corn is 25.4cm, the average leaf width is 0.86cm, and the plant height and the leaf width are lower than those of the embodiment 1, mainly because the molasses dry powder in the embodiment 1 has the acid-base resistance and the oxidation resistance, the liquid mulching film can be well adapted to various soils after being formed, and simultaneously, divalent cations of the molasses dry powder have strong chelating capacity, and are chelated with trace elements to form soluble organic mineral elements which are beneficial to the absorption of plants, so that the crops grow better.
Comparative example 3 the average plant height and average leaf width of the corn potted with PE plastic mulch purchased on the market are also lower than those of example 1, because the liquid mulch provided by the invention is in a liquid state before use, and is uniformly sprayed on the soil surface when in use, and soil particles are connected together to form a layer of special 'soil membrane' structure, and the liquid mulch also has the functions of keeping soil temperature, soil humidity and the like, and has the function of increasing fertilizer efficiency for soil.
The control group does not use a mulching film, the average plant height of the corn is only 18.4cm, the average leaf width is only 0.77cm, and the average leaf width is far lower than that of the embodiment 1 of the invention, on one hand, the invention utilizes the thickening property of guar gum, can achieve the effect of rapid thickening when being sprayed on the soil surface, can permeate into soil gaps, is combined with soil clay minerals, forms a solid coacervate film between soil air interfaces along with the evaporation of water, and has good promotion effect on the growth and development of crops; on the other hand, the invention utilizes the microbial dissolution method to extract the humic acid, the reaction condition is mild, clean conversion can be realized, and more importantly, the extracted humic acid is neutral in the liquid mulching film and can be uniformly mixed with the guar gum emulsion, so that the biological activity of the extracted humic acid is higher, and the disease-resistant, nematode-resistant and stress-resistant effects of the extracted humic acid are stronger, therefore, when the liquid mulching film potted corn provided by the embodiment 1 is used, the plant height and the leaf width of the corn are far higher than those of a control group.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The degradable liquid mulching film prepared from the lignite containing the enzyme is characterized by comprising the following raw materials in parts by weight: 85-90 parts of deionized water, 5-10 parts of enzymolysis lignite, 5-8 parts of guar gum emulsion, 3-5 parts of polylactic acid, 2.5-3.5 parts of glycerol and 1-2.5 parts of polyvinyl alcohol.
2. The degradable liquid mulching film prepared by lignite-containing enzymolysis according to claim 1, wherein the lignite-containing enzymolysis is prepared by the following method: crushing and sieving the raw lignite powder, mixing the crushed and sieved raw lignite powder with an enzymolysis solution, introducing oxygen for enzymolysis, drying and crushing the raw lignite powder after the enzymolysis is finished, and thus obtaining the enzymolysis lignite.
3. The degradable liquid mulching film prepared by lignite through enzymolysis is characterized in that the enzymolysis solution is prepared by mixing urea, sodium chloride, glucose, polyglutamic acid, peptone, bacillus subtilis and water in a mass ratio of 1 (2-3) to (5-7) to 5 (7-9) to 0.005.
4. The degradable liquid mulching film prepared by using the lignite through enzymolysis according to claim 2, wherein the mass ratio of the raw lignite to the enzymolysis solution is 7.
5. The degradable liquid mulching film prepared by lignite through enzymolysis according to claim 2, wherein the temperature during enzymolysis is 40-50 ℃, the pressure is 0.1-0.3 MPa, and the time is 7-14 days.
6. The degradable liquid mulching film prepared by lignite with enzyme hydrolysis according to claim 1, wherein the guar gum emulsion is prepared by the following method: mixing dipotassium hydrogen phosphate, potassium dihydrogen phosphate and deionized water, heating, adding guar gum powder while stirring, continuously stirring uniformly, adding molasses dry powder, and stirring uniformly again to obtain the guar gum emulsion.
7. The degradable liquid mulching film prepared by lignite through enzymolysis is characterized in that the mass ratio of dipotassium hydrogen phosphate, potassium dihydrogen phosphate, deionized water, guar gum powder and molasses dry powder is (2-5).
8. The degradable liquid mulching film prepared by using the lignite with the enzyme according to claim 6, wherein the temperature is increased to 40-60 ℃.
9. The method for preparing the degradable liquid mulching film prepared by the lignite through enzymolysis, as claimed in claim 1, is characterized by comprising the following steps: sequentially mixing and stirring deionized water, enzymolysis lignite, guar gum emulsion, polylactic acid and glycerol, adding polyvinyl alcohol, continuously stirring, and standing to obtain the liquid mulching film.
10. The method for preparing the degradable liquid mulching film containing the enzymatic hydrolysis lignite according to the claim 9, wherein the stirring speed is 1000rpm, and the temperature during the preparation process is 40-50 ℃.
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| CN112980167A (en) * | 2021-02-26 | 2021-06-18 | 华侨大学 | Degradable agricultural mulching film and preparation method thereof |
| CN112980748A (en) * | 2021-05-07 | 2021-06-18 | 河北萌帮生物科技有限公司 | Brevibacillus brevis, application and method for producing humic acid by converting lignite |
| CN114478123A (en) * | 2022-02-24 | 2022-05-13 | 内蒙古科学技术研究院 | Degradable bioactive liquid mulching film and preparation method thereof |
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