CN115353888B - Salinized farmland functional water-retaining agent and preparation method and application thereof - Google Patents
Salinized farmland functional water-retaining agent and preparation method and application thereof Download PDFInfo
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- CN115353888B CN115353888B CN202211128227.5A CN202211128227A CN115353888B CN 115353888 B CN115353888 B CN 115353888B CN 202211128227 A CN202211128227 A CN 202211128227A CN 115353888 B CN115353888 B CN 115353888B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 86
- 239000002689 soil Substances 0.000 claims abstract description 55
- 239000010871 livestock manure Substances 0.000 claims abstract description 48
- 210000003608 fece Anatomy 0.000 claims abstract description 46
- 238000009395 breeding Methods 0.000 claims abstract description 32
- 230000001488 breeding effect Effects 0.000 claims abstract description 32
- 239000011368 organic material Substances 0.000 claims abstract description 30
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 27
- 235000013365 dairy product Nutrition 0.000 claims abstract description 25
- 235000021419 vinegar Nutrition 0.000 claims abstract description 24
- 239000000052 vinegar Substances 0.000 claims abstract description 24
- 239000002023 wood Substances 0.000 claims abstract description 24
- 108010059892 Cellulase Proteins 0.000 claims abstract description 22
- 229940106157 cellulase Drugs 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 240000006024 Lactobacillus plantarum Species 0.000 claims abstract description 11
- 235000013965 Lactobacillus plantarum Nutrition 0.000 claims abstract description 11
- 229940072205 lactobacillus plantarum Drugs 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000855 fermentation Methods 0.000 claims description 28
- 230000004151 fermentation Effects 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 125000000129 anionic group Chemical group 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- 206010016807 Fluid retention Diseases 0.000 abstract description 6
- 230000003750 conditioning effect Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000002550 fecal effect Effects 0.000 abstract 3
- 239000010865 sewage Substances 0.000 abstract 3
- 230000006872 improvement Effects 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 7
- 241000227653 Lycopersicon Species 0.000 description 6
- 235000007688 Lycopersicon esculentum Nutrition 0.000 description 6
- 230000035558 fertility Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 230000004083 survival effect Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000186660 Lactobacillus Species 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229940039696 lactobacillus Drugs 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002688 soil aggregate Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention discloses a salinized farmland functional water-retaining agent, a preparation method and application thereof, and belongs to the technical field of soil conditioning. It includes a functional water retaining agent of salinized farmland, includes: 1-2 parts of cellulase, 1-2 parts of lactobacillus plantarum, 10-100 parts of polyacrylamide and 100000 parts of cow breeding manure organic materials in parts by mass; the preparation method of the dairy cow breeding fecal sewage organic material comprises the steps of adding polyacrylamide to enable the dairy cow breeding fecal sewage to be subjected to solid-liquid separation, and fermenting to prepare the dairy cow breeding fecal sewage organic material. The functional water-retaining agent and wood vinegar disclosed by the invention can be applied in a combined way, so that the water retention of soil can be enhanced, the organic matter conversion of the soil itself can be improved, the physical and chemical properties of the soil can be improved, the salinization problem of the soil can be eliminated, and the soil alkalization phenomenon can be effectively solved and inhibited.
Description
Technical Field
The invention belongs to the technical field of soil conditioning, and particularly relates to a functional water-retaining agent for salinized farmland, and a preparation method and application thereof.
Background
The problems of high salinity, poor physical structure, low fertility and the like of the salinized soil inhibit the growth and the yield of crops. The prior salty soil in China is about 3.69 multiplied by 10 7 hm 2 Most of which are not utilized effectively. The salinized farmland is reasonably developed and utilized, the quality and productivity level of the salinized farmland are improved, the important measure for solving the problems of more people and less land resources and lack of land resources in China at present is solved, and the agricultural development space can be effectively expanded.
The dairy cow breeding manure contains rich nutrient substances, and the resource utilization can not only solve the pollution problem of the breeding manure, but also be used for fertility improvement and soil structure improvement. Due to the advantages of low cost, strong dispersibility and the like, the polyacrylamide is widely used as a flocculant and a dehydrating agent in wastewater purification. The polyacrylamide applied to the soil can increase the cohesive force among soil particles, improve the soil aggregate structure, improve the water retention capacity of the soil and reduce the salt surface aggregation and nutrient loss caused by soil evaporation.
Disclosure of Invention
1. Problems to be solved
Aiming at the problem of high salinity of the existing salinized farmland, the invention provides a functional water-retaining agent for the salinized farmland, and a preparation method and application thereof.
2. Technical proposal
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the invention aims to provide a functional water-retaining agent prepared from cow breeding manure, polyacrylamide, cellulose and the like, which is applied in combination with wood vinegar for improving salinized farmland. The method has the advantages of wide raw material sources, simple process and low cost, and simultaneously solves the problems of improvement of salinized farmland and safe utilization of cow breeding manure. The invention uses polyacrylamide to overcome the problems of large volume and high water content in the resource utilization process of the dairy manure, and prepares the functional water-retaining agent with soil improvement and soil fertility improvement, thereby achieving the purposes of high-efficiency, rapid and safe utilization of the dairy manure. The invention is not only beneficial to the resource utilization of cow breeding manure, but also solves the problem of unsatisfactory improvement effect of a single conditioner.
A functional water-retaining agent for salinized farmland, comprising: 1-2 parts of cellulase, 1-2 parts of lactobacillus plantarum, 10-100 parts of polyacrylamide and 100000 parts of cow breeding manure organic materials in parts by mass;
the preparation method of the dairy cow breeding manure organic material comprises the following steps:
1) Solid-liquid separation of cow breeding manure: adding 0.5-1kg polyacrylamide into each cubic meter of dairy cow breeding manure, and carrying out solid-liquid separation on the manure by using roller screening;
2) And (3) preparing a dairy cow breeding manure organic material: uniformly mixing straw and the solid-phase manure obtained in the step 1) according to the mass ratio of 5% -15% to obtain a fermentation primary material, adding 10-50 parts of fermentation bacterial liquid and 1-2 parts of cellulase into each 100000 parts of the fermentation primary material, and fermenting to prepare the dairy cow breeding manure organic material.
Wherein, the cow dung and urine mixture in the step 1) is collected from a cow farm.
Preferably, the polyacrylamide in the step 1) is anionic, and the molecular weight is 300-400 ten thousand.
Preferably, the fermentation C/N ratio in the step 2) is 15:1, the water content is controlled to be 30-40%, the relative humidity is 65-75%, and the temperature is 40-70 ℃.
Preferably, the functional water-retaining agent is functional water-retaining agent particles with the diameter of 2-3 mm.
A preparation method of a salinized farmland functional water-retaining agent comprises the following steps:
s1, preparing a dairy cow breeding manure organic material:
1) Solid-liquid separation of cow breeding manure: adding 0.5-1kg polyacrylamide into each cubic meter of dairy cow breeding manure, and carrying out solid-liquid separation on the manure by using roller screening;
2) And (3) preparing a dairy cow breeding manure organic material: uniformly mixing straw and the solid-phase manure obtained in the step 1) according to the mass ratio of 5% -15% to obtain a fermentation primary material, adding 10-50 parts of fermentation bacterial liquid and 1-2 parts of cellulase into each 100000 parts of the fermentation primary material, and fermenting to prepare cow breeding manure organic materials;
s2, preparing a primary material of the functional water-retaining agent: respectively adding 1-2 parts of cellulase (purchased from Yiyuan Kangyuan biotechnology Co., ltd.), 1-2 parts of lactobacillus plantarum and 10-100 parts of polyacrylamide into 100000 parts of organic materials, and uniformly mixing to obtain a functional water-retaining agent primary material; preferably, the polyacrylamide is anionic, and the molecular weight is 300-400 ten thousand;
s3, preparing functional water-retaining agent particles: and (3) crushing the functional water-retaining agent primary material obtained in the step (S2), and then utilizing a granulator to prepare functional water-retaining agent particles with the diameter of 2-3mm, and screening qualified conditioner particles to obtain the functional water-retaining agent suitable for salinized farmland.
Preferably, the mass parts of the fermentation primary material, the fermentation broth and the cellulase in the step 2) are 100000 parts, 15 parts and 1 part.
Preferably, the parts by mass of the cellulase, the lactobacillus plantarum, the polyacrylamide and the organic material in the step S2 are 1 part, 50 parts and 100000 parts.
The application of the functional water-retaining agent for the salinized farmland comprises the step of co-applying the functional water-retaining agent particles and wood vinegar.
Preferably, 1.5-2t of the functional water-retaining agent and 0.2-1t of wood vinegar are uniformly spread out per mu of land, and deep-ploughed mechanically for 20-30cm to be fully and uniformly mixed with soil.
The obtained functional water-retaining agent particle product has the effects of conditioning the soil structure and fertilizing the soil fertility. Wherein the fertilizer plays a role in fertility improvement and is one or more of organic materials, cellulase and plant lactobacillus. The wood vinegar has the function of regulating the pH of soil. Wherein, the conditioning effect is one or more of polyacrylamide, organic materials, cellulase and lactobacillus plantarum.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) The functional water-retaining agent prepared based on cow breeding manure, polyacrylamide and cellulase has the advantages of wide raw material sources, simple process and low cost, and does not pollute soil and surrounding environment; meanwhile, due to the addition of polyacrylamide, the separation and fermentation process of the culture manure is easier to operate, and the water retention performance of the functional water-retaining agent is greatly improved.
(2) The lactobacillus plantarum and the organic materials can loosen soil to form a good aggregate structure, so that the soil temperature is improved, and the water retention of the soil is enhanced; the cellulase can improve the organic matter conversion of soil and improve the physicochemical property of the soil; the polyacrylamide can rapidly improve the water retention property of soil and eliminate the salinization problem of the soil; the pyroligneous liquor contains low molecular weight organic acid, and can effectively solve and inhibit soil alkalization after being applied to soil.
(3) The invention adopts a mode of combining the water-retaining agent and the wood vinegar, the water-retaining agent has long-acting conditioning property, the wood vinegar has more quick-acting effect, and organic materials are applied to a saline-alkali layer by deep turning of 20-30cm mechanically, so that the air permeability and the water retention property of the salinized farmland are fundamentally improved.
(4) The functional water-retaining agent prepared by the invention realizes the safe utilization of the cultivation manure, has low cost, and can be used as a practical technology for large-scale treatment and improvement of salinized farmland.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
As used herein, the term "about" is used to provide the flexibility and inaccuracy associated with a given term, metric or value. The degree of flexibility of a particular variable can be readily determined by one skilled in the art.
Parts by mass and other numerical data may be presented herein in a range format. It is to be understood that such range format is used merely for convenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. For example, a numerical range of about 1 to about 4.5 should be interpreted to include not only the explicitly recited limits of 1 to about 4.5, but also include individual numbers (such as 2, 3, 4) and subranges (such as 1 to 3, 2 to 4, etc.). The same principle applies to ranges reciting only one numerical value, such as "less than about 4.5," which should be construed to include all such values and ranges. Moreover, such an interpretation should apply regardless of the breadth of the range or the characteristics being described.
The invention is further described below in connection with specific embodiments.
Example 1
S1, preparing a dairy cow breeding manure organic material:
1) 1kg of anionic polyacrylamide (with the molecular weight of 400 ten thousand) is added into each cubic meter of dairy cow breeding manure, and solid-liquid separation is carried out by utilizing roller screening;
2) Mixing straw and the solid-phase manure obtained in the step 1) uniformly in a mass ratio of 10% to obtain a fermentation primary material, adding 15 parts of fermentation bacterial liquid (purchased from Anhui national environmental protection technology Co., ltd., model HW-E-12, named as special livestock manure decomposing agent) and 1 part of cellulase (purchased from Yiyuan Kangyuan biotechnology Co., ltd.) into 100000 parts of fermentation primary material (the relative humidity is 70%, the temperature is 50 ℃, the C/N ratio is 25:1, the water content is 40-65%, and after fermentation is carried out for 7 days under ventilation conditions), so as to obtain the dairy cow cultivation manure organic material (the water content is 30%).
S2, preparing a primary material of the functional water-retaining agent:
1 part of cellulase, 1 part of Lactobacillus plantarum (purchased from Chaoyang Huaxing bioengineering Co., ltd.) and 50 parts of polyacrylamide (molecular weight 400 ten thousand) were added to 100000 parts of organic materials to obtain a functional water-retaining agent.
S3, preparing granulating particles of the functional water-retaining agent: and (3) crushing the functional water-retaining agent primary material obtained in the step (S2), and then utilizing a granulator to prepare functional water-retaining agent particles with the diameter of 2-3mm, and screening qualified conditioner particles to obtain the functional water-retaining agent suitable for salinized farmland.
Application of the functional water-retaining agent in improving saline soil cultivation land: in the soil with the salt content of 0.32% and the pH value of 7.46, the application amount of the functional water-retaining agent and the wood vinegar is respectively 2 t/mu and 0.8 t/mu, the functional water-retaining agent and the wood vinegar are uniformly spread on the surface layer of the soil, and then the soil is mechanically deeply turned for 20-30cm so as to be fully mixed with the soil.
By applying the functional water-retaining agent and the wood vinegar through the method, the salt content of the soil surface can be obviously reduced compared with a control, and the survival rate of tomato seedlings is improved from 80.6 percent (without applying the functional water-retaining agent and the wood vinegar) to 91.3 percent. Soil volume weight was determined from l.18g cm of control (without functional water-retaining agent and wood vinegar applied) -3 Reduced to 1.09g cm -3 The pH value is reduced from 7.46 to 7.03, the evaporation capacity can be reduced by 17.5% to the maximum extent compared with the unmodified soil, and the tomato yield is improved by 73.3%.
Example 2
S1, preparing a dairy cow breeding manure organic material:
1) Adding 0.5kg of anionic polyacrylamide (with the molecular weight of 400 ten thousand) into each cubic meter of dairy cow breeding manure, and carrying out solid-liquid separation by utilizing roller screening;
2) Mixing straw and the solid-phase manure obtained in the step 1) uniformly in a mass ratio of 10% to obtain a fermentation primary material, adding 40 parts of fermentation bacterial liquid (purchased from Anhui national environmental protection technology Co., ltd., model HW-E-12 and named as special decomposing agent for livestock manure) and 1 part of cellulase (purchased from Yiyuan Kangyuan biotechnology Co., ltd.) into 100000 parts of fermentation primary material (the relative humidity is 70%, the temperature is 50 ℃, the C/N ratio is 25:1, the water content is 40-65%, and after fermentation is carried out for 7 days under the ventilation condition), so as to obtain the organic material (the water content is 30%) for the dairy cow cultivation manure.
S2, preparing a primary material of the functional water-retaining agent:
1.5 parts of cellulase, 1.5 parts of Lactobacillus plantarum (purchased from Chaoyang Huaxing bioengineering Co., ltd.) and 100 parts of polyacrylamide (molecular weight 400 ten thousand) were added to 100000 parts of organic materials to obtain a functional water-retaining agent.
S3, preparing granulating particles of the functional water-retaining agent: and (3) crushing the functional water-retaining agent primary material obtained in the step (S2), and then utilizing a granulator to prepare functional water-retaining agent particles with the diameter of 2-3mm, and screening qualified conditioner particles to obtain the functional water-retaining agent suitable for salinized farmland.
Application of the functional water-retaining agent in improving saline soil cultivation land: in the soil with the salt content of 0.32% and the pH value of 7.46, the application amount of the functional water-retaining agent and the wood vinegar is respectively 2 t/mu and 0.8 t/mu, the functional water-retaining agent and the wood vinegar are uniformly spread on the surface layer of the soil, and then the soil is mechanically deeply turned for 20-30cm so as to be fully mixed with the soil.
By applying the functional water-retaining agent and the wood vinegar through the method, the salt content of the soil surface can be obviously reduced compared with a control, and the survival rate of tomato seedlings is improved from 80.6 percent (without applying the functional water-retaining agent and the wood vinegar) to 86.4 percent. Soil volume weight was determined from l.18g cm of control (without functional water-retaining agent and wood vinegar applied) -3 Reduced to 1.13g cm -3 The pH value is reduced from 7.46 to 7.11, the evaporation capacity can be reduced by 14.1% at maximum compared with the unmodified soil, and the tomato yield is improved by 42.6%.
Example 3:
s1, preparing a dairy cow breeding manure organic material:
1kg of anionic polyacrylamide (with the molecular weight of 400 ten thousand) is added into each cubic meter of dairy cow breeding manure, and solid-liquid separation is carried out by utilizing roller screening;
2) Mixing straw and the solid-phase manure obtained in the step 1) uniformly in a mass ratio of 10% to obtain a fermentation primary material, adding 15 parts of fermentation bacterial liquid (purchased from Anhui national environmental protection technology Co., ltd., model HW-E-12, named as special livestock manure decomposing agent) and 1 part of cellulase (purchased from Yiyuan Kangyuan biotechnology Co., ltd.) into 100000 parts of fermentation primary material (the relative humidity is 70%, the temperature is 50 ℃, the C/N ratio is 25:1, the water content is 40-65%, and after fermentation is carried out for 7 days under ventilation conditions), so as to obtain the dairy cow cultivation manure organic material (the water content is 30%).
S2, preparing a primary material of the functional water-retaining agent:
2 parts of cellulase, 2 parts of Lactobacillus plantarum (purchased from Chaoyang Huaxing bioengineering Co., ltd.) and 50 parts of polyacrylamide (molecular weight 400 ten thousand) were added to 100000 parts of organic materials to obtain a functional water-retaining agent.
S3, preparing granulating particles of the functional water-retaining agent: and (3) crushing the functional water-retaining agent primary material obtained in the step (S2), and then utilizing a granulator to prepare functional water-retaining agent particles with the diameter of 2-3mm, and screening qualified conditioner particles to obtain the functional water-retaining agent suitable for salinized farmland.
Application of the functional water-retaining agent in improving saline soil cultivation land: in the soil with the salt content of 0.32% and the pH value of 7.46, the application amount of the functional water-retaining agent and the wood vinegar is respectively 2 t/mu and 0.3 t/mu, the functional water-retaining agent and the wood vinegar are uniformly spread on the surface layer of the soil, and then the soil is mechanically deeply turned for 20-30cm so as to be fully mixed with the soil.
By applying the functional water-retaining agent and the wood vinegar liquid in the method, the obvious reduction of the salt content of the soil surface compared with the control can be obviously observed, and the survival rate of the tomato seedlings is from 80.6 percent (the functional water-retaining agent and the wood vinegar liquid are not applied)The improvement is up to 89.3%. Soil volume weight was determined from l.18g cm of control (without functional water-retaining agent and wood vinegar applied) -3 Reduced to 1.10g cm -3 The pH value is reduced from 7.46 to 7.24, the evaporation capacity can be reduced by 16.9% at maximum compared with the unmodified soil, and the tomato yield is improved by 57.2%.
The above description of the invention and its embodiments has been given by way of illustration and not limitation, and the examples shown are merely examples of embodiments of the invention, without limitation to the actual embodiments. Therefore, if one of ordinary skill in the art is informed by this disclosure, embodiments and examples similar to the technical solution are not creatively devised without departing from the gist of the present invention, and all the embodiments and examples are considered to be within the protection scope of the present invention.
Claims (8)
1. The preparation method of the salinized farmland functional water-retaining agent is characterized by comprising the following steps:
s1, preparing a dairy cow breeding manure organic material:
1) Solid-liquid separation of cow breeding manure: adding 0.5-1kg polyacrylamide into each cubic meter of dairy cow breeding manure, and carrying out solid-liquid separation on the manure by using roller screening;
2) And (3) preparing a dairy cow breeding manure organic material: uniformly mixing straw and the solid-phase manure obtained in the step 1) according to the mass ratio of 5% -15% to obtain a fermentation primary material, adding 10-50 parts of fermentation bacterial liquid and 1-2 parts of cellulase into each 100000 parts of the fermentation primary material, and fermenting to prepare cow breeding manure organic materials;
s2, preparing a primary material of the functional water-retaining agent: respectively adding 1-2 parts of cellulase, 1-2 parts of lactobacillus plantarum and 10-100 parts of polyacrylamide into 100000 parts of organic materials, and uniformly mixing to obtain a functional water-retaining agent primary material; the cellulase is purchased from Yiyuan Kangyuan biotechnology limited company;
s3, preparing functional water-retaining agent particles: and (3) crushing the functional water-retaining agent primary material obtained in the step (S2), and then utilizing a granulator to prepare functional water-retaining agent particles with the diameter of 2-3mm, and screening qualified conditioner particles to obtain the functional water-retaining agent suitable for salinized farmland.
2. The method for preparing the salinized farmland functional water-retaining agent according to claim 1, wherein the mass parts of the fermentation primary material, the fermentation broth and the cellulase in the step 2) are 100000 parts, 15 parts and 1 part.
3. The method for preparing the salinized farmland functional water-retaining agent according to claim 1, wherein the mass parts of the cellulase, the lactobacillus plantarum, the polyacrylamide and the organic materials in the step S2 are 1 part, 50 parts and 100000 parts.
4. The method for preparing a functional water-retaining agent for salinized farmland according to claim 1, wherein the polyacrylamide in the step 1) is anionic, and the molecular weight is 300-400 ten thousand.
5. The method for preparing a functional water-retaining agent for salinized farmland according to claim 1, characterized in that the fermentation C/N ratio in step 2) is 15:1, the water content is controlled to be 30-40%, the relative humidity is controlled to be 65-75%, and the temperature is controlled to be 40-70 ℃.
6. The method for preparing a functional water-retaining agent for salinized farmland according to claim 1, wherein the functional water-retaining agent is functional water-retaining agent particles with a diameter of 2-3 mm.
7. The application of the functional water-retaining agent for salinized farmland, which is characterized by comprising the step of co-applying particles of the functional water-retaining agent prepared by the preparation method of the functional water-retaining agent for salinized farmland according to claim 1 with pyroligneous liquor.
8. The application of the functional water-retaining agent for salinized farmland according to claim 7, which is characterized in that 1.5-2t of the functional water-retaining agent and 0.2-1t of wood vinegar are uniformly spread per mu of land, and deep-ploughing is performed mechanically for 20-30cm, so that the functional water-retaining agent and the wood vinegar are fully and uniformly mixed with soil.
Priority Applications (1)
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