CN101054454A - Liquid ground film and manufacturing and using method thereof - Google Patents
Liquid ground film and manufacturing and using method thereof Download PDFInfo
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- CN101054454A CN101054454A CN 200610017627 CN200610017627A CN101054454A CN 101054454 A CN101054454 A CN 101054454A CN 200610017627 CN200610017627 CN 200610017627 CN 200610017627 A CN200610017627 A CN 200610017627A CN 101054454 A CN101054454 A CN 101054454A
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Abstract
A liquid mulching film is composed of fatty acid dregs, polyvinyl alcohol, octadecanol, neutral emulsifying agent and water and is produced by pretreatment, saponification, emulsification and refrigeration. The application method of the liquid mulching film is: adding water for diluting it, then uniformly spraying on the smooth floor or leaf area. The product has a low price, a simple producing craft, a convenient application. The liquid mulching film can prevent soil water evaporation, improve the soil physical figure, pave a good growth and development foundation for crops.
Description
Technical field
The invention belongs to mulch film, relate in particular to liquid ground film; Also relate to the manufacture method of this mulch film and its using method simultaneously.
Background technology
What use was more in the present farmland is plastic film, this mulch film in use has and heats, economizes on water and make the effect of crop precocious, but because this mulch film is mainly made by polyethylene, and polyethylene is a kind of material that is difficult to degrade, along with its a large amount of uses, mulch film residual in the soil is more and more, their accumulations have formed barrier layer, hinder the growth of crop root and to the moisture content nutrient absorbing, thereby influence growing and output of crop, especially more obvious to the influence of fibrous root type crop; In addition, in order to make agricultural mulching under temperature variation and sun exposure, keep stablizing condition, increase heavy metal salt and organic compound such as containing Pb, Cd, Zn, Ba, Sn through regular meeting in process of production, in mulch film uses, these heavy metals are easy to stripping and enter soil, cause the pollution of soil; Softening agent-the phthalic acid and the diisobutyl ester that add when producing mulch film can also destroy the chlorophyllous formation of crop, blade is bleached and cause crop failure.Therefore some novel mulch films are developed in the recent period, be to disclose " a kind of lignin water conservation complex liquid mulch film " in 02121393.3 the patent application document as application number, this mulch film is to be mixed by lignin liquor, chitosan, collagen protein, tensio-active agent and whipping agent, this mulch film can be avoided the disadvantage of plastic film, but manufacturing cost is higher.
Summary of the invention
It is more cheap to the purpose of this invention is to provide a kind of price, easy to use, not only has the water conservation warming effect but also be beneficial to the liquid ground film that improves the soil physics shape; The manufacture method and the using method of this liquid ground film are provided simultaneously.
The objective of the invention is to be achieved through the following technical solutions: this liquid ground film is formed by the feedstock production of following weight part:
Fatty acid residue 15-30 polyvinyl alcohol 4-6 stearyl alcohol 7-12
Neutral emulsifying agent 0.4-0.8 water 50-75.
Described fatty acid residue be the residue after edible oil proposes or produce soap after residue.Described neutral emulsifying agent is a peregal.
Described neutral emulsifying agent is sodium lauryl sulphate salt or calcium dodecylbenzene sulphonate or stearic acid sodium salt.
Make the method for described liquid ground film, undertaken by following step: a, elder generation take by weighing raw material by above-mentioned dosage; Getting water in the dosage again, to prepare concentration be 2～7% sodium hydroxide solution;
B, pre-treatment
The fatty acid residue that the takes by weighing saponification container of packing into, be heated to 70～95 ℃;
C, saponification
In the good fatty acid residue of pre-treatment, be added in the concentration for preparing among the step a and be 2～7% sodium hydroxide solution, the temperature of this solution should be 75～90 ℃, answers the limit edged to stir when adding sodium hydroxide solution, with the degree of being that neutralizes fully, saponification time is 1～3 minute;
D, emulsification
In the good solution of saponification, add remainder water in stearyl alcohol, polyvinyl alcohol, neutral emulsifying agent and the dosage that takes by weighing by dosage, making water temperature is 80～90 ℃, fully stirs then, and this solution temperature remains on 60～90 ℃, and emulsification times is 40～50 minutes;
E, cooling
After emulsification finishes, stop heating, but will continue to stir 100～200 rev/mins of stirring velocitys.
Described manufacture method is: in saponification step, stirring velocity is 2000～3000 rev/mins; In emulsifying step, stirring velocity is 200～500 rev/mins; In cooling step, when solution is cooled to 30～50 ℃, stop to stir.
The using method of described liquid ground film is: the water that adds the 20-80 weight part in the described mulch film of 1 weight part dilutes it, then evenly sprays with the spraying apparatus.
Described using method is: the liquid ground film after will diluting evenly is sprayed on the smooth good soil surface.
Described using method is: will dilute good liquid ground film and evenly be sprayed on the crop profile blade with the spraying apparatus.
Since manufacture a product among the present invention raw material type few, and price is more cheap, manufacturing process is also not too complicated, therefore the liquid ground film price of making is more cheap; This product only needs to get final product with conventional agricultural atomizer tool sprinkling behind the thin up in use, and is very easy to use;
If with behind the product thin up of the present invention, be applied in soil surface, the surface of soil then can form one deck cured film, and this film has stoped the evaporation of soil moisture to have good water conservation effect; If this product after will diluting evenly is sprayed on the crop profile blade, can reduce blade transpiration rate 25～35%, improve leaf water utilising efficiency 30～40%,
After soil is covered by liquid ground film, owing to restrained the evaporation of moisture content in the soil, therefore preserved because of the lost energy of water evaporates, so this in addition liquid ground film is that black helps absorbing more sun power after solidifying, thereby also improved the heat energy of soil, so product of the present invention has tangible warming effect to soil;
After this liquid ground film is covered in soil, can also reduces the soil weight, increase soil porosity, help combination between soil particle, form comparatively ideal coacervate, and then improved the physical form of soil, for well growing of crop laid a good foundation.
Embodiment
Embodiment 1:a, take by weighing: fatty acid residue 15 weight parts, polyvinyl alcohol 4 weight parts, stearyl alcohol 7 weight parts, peregal 0.4 weight part, water 50 weight parts; Getting a part of water, to make concentration be 2% sodium hydroxide solution;
B, fatty acid residue is carried out pre-treatment: promptly, be heated to 70 ℃, and keep 70 ℃ temperature 5 minutes the fatty acid residue saponification container of packing into.
C, saponification
The concentration that step a is made is most 75 ℃ of 2% sodium hydroxide solution heating, this solution is slowly joined in the good fatty acid residue of pre-treatment, and stir on hydro-oxidation sodium solution limit, limit, with the degree of being that neutralizes fully, stirring velocity is 2000 rev/mins, and saponification time is 3 minutes.
D, emulsification
In the good solution of saponification, add stearyl alcohol, polyvinyl alcohol, peregal and the remainder water of the amount of taking by weighing among the step a, water temperature should be at 80 ℃, fully stir then, stirring velocity is 200 rev/mins, and solution temperature should remain on 60～65 ℃ around here, and emulsification times is 40 minutes.
The e cooling
After emulsification finishes, stop heating, but will continue to stir, stirring velocity is 100 rev/mins, when treating that solution is cooled to 30 ℃, stops to stir, and is finished product.
Fatty acid residue in the present embodiment is for making the remaining slag of perfumed soap; Add " remainder water " in the emulsifying step and remove in the saponification step water outside institute's water in the sodium hydroxide solution for the water of dosage.Water sum in " remainder water " and the sodium hydroxide solution is 50 weight parts in the present embodiment.
Embodiment 2:a, take by weighing: fatty acid residue 30 weight parts, polyvinyl alcohol 6 weight parts, stearyl alcohol 12 weight parts, peregal 0.8 weight part, water 75 weight parts
B, fatty acid residue is carried out pre-treatment:, heat and be retained to 95 ℃ promptly the fatty acid residue saponification container of packing into.
C, saponification
In the good fatty acid residue of pre-treatment, slowly adding concentration is that 7% temperature is 90 ℃ a sodium hydroxide solution, and stir on hydro-oxidation sodium solution limit, limit, and with the degree of being that neutralizes fully, stirring velocity is 2000 rev/mins, and saponification time is 3 minutes.
D, emulsification
In the good solution of saponification, add stearyl alcohol, polyvinyl alcohol, peregal and the remainder water of the amount of taking by weighing among the step a, water temperature should be at 80 ℃, fully stir then, stirring velocity is 200～rev/min, solution temperature should remain on 60～65 ℃ around here, and emulsification times is 40 minutes.
The e cooling
After emulsification finishes, stop heating, but still need to stir, stirring velocity is 100 rev/mins, when treating that solution is cooled to 30 ℃, stops to stir, and is finished product.
Fatty acid residue in the present embodiment is for making the remaining slag of soap; Add " remainder water " in the emulsifying step and remove in the saponification step water outside institute's water in the sodium hydroxide solution for the water of dosage.Water sum in " remainder water " and the sodium hydroxide solution is 75 weight parts in the present embodiment.
Other working method are identical with embodiment 1.
Embodiment 3:a, take by weighing: fatty acid residue 20 weight parts, polyvinyl alcohol 5 weight parts, stearyl alcohol 8 weight parts, peregal 0.5 weight part, water 55 weight parts, getting a part of water, to make concentration be 3% sodium hydroxide solution;
B, fatty acid residue is carried out pre-treatment:, be heated to 75 ℃ and remained on 70-75 ℃ of temperature following 4 minutes promptly the fatty acid residue saponification container of packing into.
C, saponification
In the good fatty acid residue of pre-treatment, adding the concentration for preparing among the step a is that 3% temperature is 80 ℃ a sodium hydroxide solution, and stir on hydro-oxidation sodium solution limit, limit, and with the degree of being that neutralizes fully, stirring velocity is 2500 rev/mins, and saponification time is 2.5 minutes.
D, emulsification
In the good solution of saponification, add stearyl alcohol, polyvinyl alcohol, peregal and the remainder water of the amount of taking by weighing among the step a, water temperature should be 85 ℃, fully stir then, stirring velocity is 300 rev/mins, and solution temperature should remain on 65～65 ℃ around here, and emulsification times is 40 minutes.
The e cooling
After emulsification finishes, stop heating, but should constantly stir, 120 rev/mins of stirring velocitys when treating that solution is cooled to 40 ℃, stop to stir, and are finished product.
Fatty acid residue in the present embodiment is that the sesame oil expression proposes the remaining slag in oil back; Add " remainder water " in the emulsifying step and remove in the saponification step water outside institute's water in the sodium hydroxide solution for the water of dosage.Water sum in " remainder water " and the sodium hydroxide solution is 55 weight parts in the present embodiment.
Other working method are identical with embodiment 1.
Embodiment 4:a, take by weighing: fatty acid residue 25 weight parts, polyvinyl alcohol 5 weight parts, stearyl alcohol 8.5 weight parts, sodium lauryl sulphate salt 0.6 weight part, water 60 weight parts
When fatty acid residue is carried out pre-treatment, should be heated to 70 ℃ and remain on 70 ℃ following 3 minutes of temperature.
C, saponification
In the good fatty acid residue of pre-treatment, slowly adding concentration is that 4% temperature is 78 ℃ a sodium hydroxide solution, and stir on hydro-oxidation sodium solution limit, limit, and with the degree of being that neutralizes fully, stirring velocity is 2000 rev/mins, and saponification time is 3 minutes.
D, emulsification
In the good solution of saponification, add stearyl alcohol, polyvinyl alcohol, sodium lauryl sulphate salt and the remainder water of the amount of taking by weighing among the step a, water temperature should be at 80 ℃, fully stir then, stirring velocity is 200～rev/min, solution temperature should remain on 60～65 ℃ around here, and emulsification times is 40 minutes.
The e cooling
After emulsification finishes, stop heating, 100 rev/mins of stirring velocitys when treating that solution is cooled to 30 ℃, stop to stir, and are finished product.Other are identical with embodiment 1.
Embodiment 5: step and method according to embodiment 3 take by weighing earlier: fatty acid residue 25 weight parts, polyvinyl alcohol 5.5 weight parts, stearyl alcohol 10 weight parts, Sodium dodecylbenzene sulfonate 0.7 weight part, water 70 weight parts
Again fatty acid residue is carried out pre-treatment: in pre-treatment, be heated to 90 ℃, and remain on 85～90 ℃.
Be in saponification step in the good fatty acid residue of pre-treatment, adding temperature is 85 ℃, and concentration is 6% sodium hydroxide solution, and stirring velocity is 2800 rev/mins.Saponification time is 1.5 minutes.
In the emulsifying step, in the good solution of saponification, add the stearyl alcohol, polyvinyl alcohol, Sodium dodecylbenzene sulfonate and the remainder water that take by weighing, water temperature is 85 ℃, and stirring velocity is 450 rev/mins, and solution temperature remains on 80-85 ℃ around here, and emulsification times is 45 minutes.
In cooling step, stop heating, stirring velocity is 150 rev/mins, when treating that solution is cooled to 45 ℃, stops to stir, and emits finished product.Other are identical with embodiment 3.
Embodiment 6: step and method according to embodiment 3 take by weighing earlier: fatty acid residue 18 weight parts, polyvinyl alcohol 5 weight parts, stearyl alcohol 9 weight parts, stearic acid sodium salt 0.6 weight part, water 65 weight parts; Compound concentration is 5% sodium hydroxide solution.
Again fatty acid residue is carried out pre-treatment: in pre-treatment, be heated to 85 ℃, and remain on 85 ℃ stand-by.
Be in saponification step in the good fatty acid residue of pre-treatment, adding temperature is 87 ℃, and concentration is 5% sodium hydroxide solution, and stirring velocity is 2500 rev/mins.Saponification time is 2.5 minutes.
In the emulsifying step, in the good solution of saponification, add the stearyl alcohol, polyvinyl alcohol, stearic acid sodium salt and the remainder water that take by weighing, water temperature is 83 ℃, and stirring velocity is 400 rev/mins, and solution temperature remains on 78 ℃ around here, and emulsification times is 43 minutes;
In cooling step, stop heating, stirring velocity is 120 rev/mins, when treating that solution is cooled to 35 ℃, stops to stir, and is finished product.Other are identical with embodiment 3.
Embodiment 7: step and method according to embodiment 1 take by weighing earlier: fatty acid residue 18 weight parts, polyvinyl alcohol 6 weight parts, stearyl alcohol 9 weight parts, peregal 0.65 weight part, water 60 weight parts; The preparation sodium hydroxide solution.
Again fatty acid residue is carried out pre-treatment: in pre-treatment, be heated to 83 ℃, and remain on 83 ℃.
Be in saponification step in the good fatty acid residue of pre-treatment, adding temperature is 80 ℃, and concentration is 3.5% sodium hydroxide solution, and stirring velocity is 2500 rev/mins.Saponification time is 1.2 minutes.
In emulsifying step, be in the good solution of saponification, add the stearyl alcohol, polyvinyl alcohol, peregal and the water that take by weighing, water temperature is 86 ℃, and stirring velocity is 350 rev/mins, and solution temperature remains on 76 ℃ around here, and emulsification times is 48 minutes.
In cooling step, stop heating, stirring velocity is 120 rev/mins, when treating that solution is cooled to 48 ℃, stops to stir, and is finished product.Other are identical with embodiment 1.
Embodiment 8: step and method according to embodiment 1 take by weighing earlier: fatty acid residue 29 weight parts, polyvinyl alcohol 4.2 weight parts, stearyl alcohol 9 weight parts, peregal 0.45 weight part, water 60 weight parts
Again fatty acid residue is carried out pre-treatment: in pre-treatment, be heated to 72 ℃, and remain on 70 ℃.
Be in saponification step in the good fatty acid residue of pre-treatment, adding temperature is 88 ℃, and concentration is 5% sodium hydroxide solution, and stirring velocity is 2500 rev/mins.Saponification time is 2.5 minutes.
In the emulsifying step, in the good solution of saponification, add the stearyl alcohol, polyvinyl alcohol, peregal and the water that take by weighing, water temperature is 70 ℃, and stirring velocity is 240 rev/mins, and solution temperature remains on 70 ℃ around here, and emulsification times is 40 minutes.
In cooling step, stop heating, stirring velocity is 180 rev/mins, when treating that solution is cooled to 35 ℃, stops to stir, and is finished product.Other are identical with embodiment 1.
Fatty acid residue described in the above embodiment can be grease and makes the slag that is left behind soap or the perfumed soap, also can be with remaining slag behind the oil expression taking-up greases such as cottonseed, sesame, soybean, peanut, vegetable seed.
In the saponification step, the sodium hydroxide solution that adds in the good fatty acid residue of pre-treatment can be used potassium hydroxide solution or other any alkaline solutions instead.
Also available nonadecanol of stearyl alcohol in the raw material or eicosanol replace.
Using method to the liquid ground film produced in the foregoing description is as follows:
Embodiment 9: with the liquid ground film of being produced among the embodiment 1-8, get the water that 1 weight part adds 40 weight parts it is diluted, the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the crop profile blade uniformly, with wet degree of being.
Embodiment 10: the water that adds the 55-60 weight part in the liquid ground film of being produced among the 1 weight part embodiment 1-8, with its dilution, the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the crop profile blade uniformly, with wet degree of being.
Embodiment 11: the ratio that adds 65 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the crop profile blade uniformly, squirts with the blade face to be degree.
Embodiment 12: the ratio that adds 80 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with the spraying apparatus then is sprayed on the crop profile blade uniformly, squirts with the blade face to be degree.
Embodiment 13: the ratio that adds 50 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with the spraying apparatus then is sprayed on the smooth good soil surface uniformly, and the soil surface coverage should be 50%.
Embodiment 14: the ratio that adds 70 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with the spraying apparatus then is sprayed on the smooth good soil surface uniformly, and the soil surface coverage should be 60%.
Embodiment 15: the ratio that adds 45 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with the spraying apparatus then is sprayed on the smooth good soil surface uniformly, and the soil surface coverage should be 45%.
Embodiment 16: the ratio that adds 20 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the smooth good soil surface uniformly, and the soil surface coverage should be 40%.
Embodiment 17: the ratio that adds 30 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the smooth good soil surface uniformly, and the soil surface coverage should be 45%.
Embodiment 18: the ratio that adds 35 weight parts waters in 1 weight part liquid ground film is diluted liquid ground film, and the liquid ground film after will diluting with conventional agricultural atomizer then is sprayed on the crop profile blade uniformly, with wet degree of being.
Claims (9)
1, a kind of liquid ground film is characterized in that: it is formed by the feedstock production of following weight part,
Fatty acid residue 15-30 polyvinyl alcohol 4-6 stearyl alcohol 7-12
Neutral emulsifying agent 0.4-0.8 water 50-75.
2, liquid ground film according to claim 1 is characterized in that: described fatty acid residue be the residue after edible oil proposes or produce soap after residue.
3, liquid ground film according to claim 1 and 2 is characterized in that: described neutral emulsifying agent is a peregal.
4, liquid ground film according to claim 1 and 2 is characterized in that: described neutral emulsifying agent is sodium lauryl sulphate salt or calcium dodecylbenzene sulphonate or stearic acid sodium salt.
5, make the method for liquid ground film according to claim 1, it is characterized in that being undertaken by following step:
A, elder generation take by weighing raw material by above-mentioned dosage; Getting water in the dosage again, to prepare concentration be 2～7% sodium hydroxide solution;
B, pre-treatment
The fatty acid residue that the takes by weighing saponification container of packing into, be heated to 70～95 ℃;
C, saponification
In the good fatty acid residue of pre-treatment, be added in the concentration for preparing among the step a and be 2～7% sodium hydroxide solution, the temperature of this solution should be 75～90 ℃, answers the limit edged to stir when adding sodium hydroxide solution, with the degree of being that neutralizes fully, saponification time is 1～3 minute;
D, emulsification
In the good solution of saponification, add remainder water in stearyl alcohol, polyvinyl alcohol, neutral emulsifying agent and the dosage that takes by weighing by dosage, making water temperature is 80～90 ℃, fully stirs then, and this solution temperature remains on 60～90 ℃, and emulsification times is 40～50 minutes;
E, cooling
After emulsification finishes, stop heating, but will continue to stir 100～200 rev/mins of stirring velocitys.
6, manufacture method according to claim 5 is characterized in that: in saponification step, stirring velocity is 2000～3000 rev/mins; In emulsifying step, stirring velocity is 200～500 rev/mins; In cooling step, when solution is cooled to 30～50 ℃, stop to stir.
7, the using method of the described liquid ground film of claim 1 is characterized in that: the water that adds the 20-80 weight part in the described mulch film of 1 weight part dilutes it, then evenly sprays with the spraying apparatus.
8, using method according to claim 7 is characterized in that: the liquid ground film after will diluting evenly is sprayed on the smooth good soil surface.
9, using method according to claim 7 is characterized in that: will dilute good liquid ground film and evenly be sprayed on the crop profile blade with the spraying apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100176273A CN100537655C (en) | 2006-04-10 | 2006-04-10 | Liquid ground film and manufacturing and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100176273A CN100537655C (en) | 2006-04-10 | 2006-04-10 | Liquid ground film and manufacturing and using method thereof |
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| Publication Number | Publication Date |
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| CN101054454A true CN101054454A (en) | 2007-10-17 |
| CN100537655C CN100537655C (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100176273A Expired - Fee Related CN100537655C (en) | 2006-04-10 | 2006-04-10 | Liquid ground film and manufacturing and using method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101790934A (en) * | 2010-04-01 | 2010-08-04 | 于飞 | Method for improving plant planting desert |
| CN103314075A (en) * | 2010-08-20 | 2013-09-18 | 罗地亚(中国)有限公司 | Soil additives for promoting seed germination and prevention of evaporation and methods for using the same |
| CN104388097A (en) * | 2014-09-27 | 2015-03-04 | 张乔木 | Loess fixation maintaining agent and preparation method thereof |
| CN104403135A (en) * | 2014-12-02 | 2015-03-11 | 天津北洋百川生物技术有限公司 | Liquid plastic mulch and preparation method thereof |
| CN103314075B (en) * | 2010-08-20 | 2016-12-14 | 索尔维投资有限公司 | For promoting germination, the soil additive of suppression evaporation and using method thereof |
| CN109845550A (en) * | 2018-11-30 | 2019-06-07 | 烟台沃斯生物技术有限公司 | Starch a kind ofly and preparation method thereof |
| WO2020103268A1 (en) * | 2018-11-20 | 2020-05-28 | 青岛睿鸿鑫环保科技有限公司 | Use of water-soluble polymer in preparation of plant protection agent for protecting plant leaf surface from salt mist damage |
-
2006
- 2006-04-10 CN CNB2006100176273A patent/CN100537655C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101790934A (en) * | 2010-04-01 | 2010-08-04 | 于飞 | Method for improving plant planting desert |
| CN103314075A (en) * | 2010-08-20 | 2013-09-18 | 罗地亚(中国)有限公司 | Soil additives for promoting seed germination and prevention of evaporation and methods for using the same |
| CN103314075B (en) * | 2010-08-20 | 2016-12-14 | 索尔维投资有限公司 | For promoting germination, the soil additive of suppression evaporation and using method thereof |
| CN104388097A (en) * | 2014-09-27 | 2015-03-04 | 张乔木 | Loess fixation maintaining agent and preparation method thereof |
| CN104388097B (en) * | 2014-09-27 | 2017-12-26 | 广州市绿化公司 | A kind of loess fixes retention agent and preparation method thereof |
| CN104403135A (en) * | 2014-12-02 | 2015-03-11 | 天津北洋百川生物技术有限公司 | Liquid plastic mulch and preparation method thereof |
| CN104403135B (en) * | 2014-12-02 | 2016-08-17 | 天津北洋百川生物技术有限公司 | A kind of liquid ground film and preparation method thereof |
| WO2020103268A1 (en) * | 2018-11-20 | 2020-05-28 | 青岛睿鸿鑫环保科技有限公司 | Use of water-soluble polymer in preparation of plant protection agent for protecting plant leaf surface from salt mist damage |
| CN109845550A (en) * | 2018-11-30 | 2019-06-07 | 烟台沃斯生物技术有限公司 | Starch a kind ofly and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN100537655C (en) | 2009-09-09 |
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