CN113667486A - Acidic soil remediation agent and preparation method and application thereof - Google Patents
Acidic soil remediation agent and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to the technical field of soil improvement, and particularly discloses an acidic soil remediation agent and a preparation method and application thereof. The repairing agent comprises the following components: 20-40 parts of microbial pellets, 50-70 parts of deacidification particles and 120-160 parts of organic fertilizer. Wherein: the microbial sphere comprises: the microbial agent comprises a network matrix, polyglutamic acid, polygalacturonic acid, microbial powder and cellulose ether, wherein microorganisms in the microbial powder are attached to the network matrix. The acid reducing particles comprise: modified white mud, dicalcium ferrite and water; the modified white mud refers to white mud powder with an active ingredient comprising calcium oxide. The acidic soil remediation agent of the invention is characterized in that: the acid reducing particles taking the modified white mud and the dicalcium ferrite as main components can release alkaline substances for a long time and prevent secondary acidification of soil; the microbial ball can provide an ecological network system for the long-term survival of the microbial bacteria and can continuously release the microbial bacteria and nutrients to the soil.
Description
Technical Field
The invention relates to the technical field of soil improvement, in particular to an acidic soil remediation agent and a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In order to meet the huge food demand brought by the rapid increase of population, people increase the yield of food by means of fertilizer application. However, when the fertilizer is excessively applied, particularly when the nitrogen fertilizer is excessively applied, the nitrogen fertilizer can be converted into nitrate in the decomposition process, and a large amount of calcium and magnesium ions in the soil can be taken away while the nitrate is lost, so that soil acidification is caused. Acidification can affect the activity of organisms in soil, change the form of nutrients in soil, reduce the effectiveness of the nutrients, promote free manganese ions and aluminum ions to be dissolved in soil solution and generate toxic action on crops. Meanwhile, the fertilizing amount is further increased to meet the crop demand, so that vicious circle is caused.
At present, the measures mainly adopted to improve the land burden caused by over fertilization comprise applying organic fertilizer, reasonably watering and adding lime. Although the method can effectively and rapidly reduce acidity and supplement fertilizers, the durability is poor, and the soil is easy to be acidified again.
Disclosure of Invention
Aiming at the problems, the invention provides an acidic soil remediation agent and a preparation method and application thereof. In order to achieve the above object, the present invention provides the following technical solutions.
In a first aspect of the invention, the acidic soil remediation agent comprises the following components in parts by weight: 20-40 parts of microbial pellets, 50-70 parts of deacidification particles and 120-160 parts of organic fertilizer. Wherein: the microbial sphere comprises: the microbial agent comprises a network matrix, polyglutamic acid, polygalacturonic acid, microbial powder and cellulose ether, wherein microorganisms in the microbial powder are attached to the network matrix. The acid reducing particles comprise: modified white mud, dicalcium ferrite and water; the modified white mud refers to white mud powder with an active ingredient comprising calcium oxide.
Further, the microbial ball is a particulate matter comprising 160-180 parts by weight of a network matrix, 3-5 parts by weight of polyglutamic acid, 5-10 parts by weight of polygalacturonic acid, 10-30 parts by weight of microbial powder and 10-20 parts by weight of cellulose ether. The microbial ball can continuously release microbial bacteria and nutrients to soil, and improve soil activity and the diversity of probiotics.
Further, the microorganisms in the microbial powder include: the bacillus subtilis (active substances such as subtilin, polymyxin, nystatin, gramicidin and the like generated in the growth process have obvious inhibition effect on pathogenic bacteria or conditional pathogenic bacteria of endogenous infection), the bacillus licheniformis (the dysbacteriosis can be adjusted to achieve the treatment purpose, the organism can be promoted to generate antibacterial active substances and kill the pathogenic bacteria, the antibacterial active substances can be generated, a unique biological oxygen-deprivation action mechanism can be realized, the growth and the propagation of the pathogenic bacteria can be inhibited), the bacillus laterosporus (the soil hardening phenomenon is solved by improving and loosening the soil, so that the soil is activated, and the fertilizer utilization rate is improved), and the like.
Further, the acid reducing particles are particles comprising 70-90 parts by weight of modified white mud, 10-20 parts by weight of dicalcium ferrite and 15-30 parts by weight of water. The acid reducing particles can not only realize the restoration of acidified soil, but also prevent the secondary acidification of the soil.
Further, the network matrix comprises juice waste residue powder, such as waste residue powder of at least one of apple, pear, etc. dried after juicing. The fruit juice waste residue not only contains a large amount of cellosilk which can provide an ecological network for microorganisms in the microbial powder to attach, but also contains pectin which can be converted into pectinase to promote the attachment of microbial strains.
Further, the organic fertilizer comprises: compost, cake manure, green manure, biogas manure, animal manure and urine manure, and the like. In the invention, the organic fertilizer not only can provide comprehensive nutrition for crops, but also has long fertilizer efficiency, can increase and renew soil organic matters, promotes the propagation of microorganisms, and improves the physicochemical property and the biological activity of soil.
In a second aspect of the invention, a method for preparing an acidic soil remediation agent is provided, which comprises the following steps:
(1) preparing modified white mud powder: calcining the lime mud to obtain CaCO3、Ca(OH)2Decomposing into active ingredient CaO, and grinding to obtain modified white mud powder.
(2) Preparing the deacidification particles: mixing the modified white mud powder, dicalcium ferrite and water, and granulating to obtain the deacidification particles.
(3) Preparing a microbial pellet: and (3) performing steam explosion treatment on the network matrix powder, then uniformly mixing the network matrix powder with the polyglutamic acid, the polygalacturonic acid and the microbial powder, maintaining, then adding the cellulose ether, uniformly mixing and granulating to obtain the microbial ball.
(4) And mixing the deacidification particles, the microbial balls and the organic fertilizer in proportion to obtain the acid soil remediation agent.
Further, in the step (1), if the white mud is not dried, the white mud is dried for 1-3 hours at 90-115 ℃ before calcination, so that redundant moisture in the white mud is removed, and later-stage calcination is facilitated.
Further, in the step (1), the calcination conditions are as follows: calcining for 2-3 hours at 500-750 ℃, and then grinding for 10-40 minutes to obtain the product. CaCO in lime mud after high temperature calcination3、Ca(OH)2Decomposing into active ingredient CaO, which can release hydroxide ions after being hydrated in the soil, thereby reducing the acidity of the soil.
Further, in the step (3), the preparation method of the network matrix powder comprises: washing and drying the fruit juice waste residues until the water content is 15-40%, and then grinding to obtain fruit juice waste residue powder, namely the network matrix. In the invention, the network matrix can provide an ecological network for microorganisms to attach to, and the microbial ball taking the network matrix as a main component can effectively increase the porosity of soil, improve the air permeability and effectively solve the problem of soil hardening.
Further, in the step (3), the steam explosion treatment refers to performing steam explosion treatment on the juice waste residue powder at a pressure of 1.2-2.4 MPa for 5-25 seconds. The internal structure of the juice waste residue is destroyed through steam explosion treatment, so that tissues such as lignin, cellulose, hemicellulose and the like and sugar chains are separated in a segmented manner, and a rich space network structure is formed inside the juice waste residue.
Further, in the step (3), the curing conditions are as follows: curing for 10-20 hours at the temperature of 25-55 ℃ and the relative humidity of 60-90%. During the curing process, the microbial powder is attached to and grows on the fruit juice waste residue powder through polyglutamic acid and polygalacturonic acid.
In a third aspect of the invention, the application of the acidic soil remediation agent in the fields of agricultural engineering, environmental engineering and the like is provided, and the remediation agent not only can be used for remedying acidified soil, but also can be used for improving the secondary acidification resistance of the soil.
Compared with the prior art, the invention has the following beneficial effects:
(1) the acidic soil remediation agent of the invention is characterized in that: the acid reducing particles taking the modified white mud and the dicalcium ferrite as main components can release alkaline substances for a long time, so that the secondary acidification resistance of the soil is improved; the microbial ball can provide an ecological network system for the long-term survival of the microbial bacteria, can continuously release the microbial bacteria and nutrients to the soil, and promotes the soil activity. The organic fertilizer not only can provide comprehensive nutrition for crops, but also has long fertilizer efficiency, can increase and renew soil organic matters, promotes microbial propagation, and improves the physicochemical property and the biological activity of soil.
(2) The acid reducing particles bond the modified white mud powder together through the gelling property generated after the hydration of dicalcium ferrite, and the hydration releases the iron glue (Fe (OH)3) The iron colloid can hydrate and release OH of calcium oxide in the modified white mud-The adsorption is carried out, so that the control of the acid reducing rate is realized, the acid reducing particles can release alkaline substances for a long time, and the problems of poor durability and easy re-acidification of soil in the traditional method of applying organic fertilizer, reasonably watering, lime adding and the like to the soil for acid reduction are solved. In addition, the OH of the deacidification particles can be regulated and controlled by the matching proportion of the dicalcium ferrite and the modified white mud powder-Release rate and period.
(3) The dicalcium ferrite in the acid reducing particles can release calcium ions to make up the calcium ions taken away when nitrate converted in the process of decomposing nitrogen fertilizer is lost, so that the dicalcium ferrite is helpful for preventing secondary acidification of soil, and meanwhile, the dicalcium ferrite is hydrated to generate iron colloid (Fe (OH)3) The method is beneficial to improving the soil cohesiveness, improving the aggregation degree, increasing the soil porosity and preventing hardening.
(4) Too high soil acidity can affect the activity of organisms in the soil, and changing the form of nutrients in the soil can reduce the effectiveness of the nutrients. However, the effect of directly reducing acid or supplementing nutrients to the soil is easy to rebound after watering. The microbial community provided by the invention takes the fruit juice waste residue powder as a main component, can be used as an ecological network-shaped matrix to provide an attachment place for microbial community, and the microbial community is attached to the fruit juice waste residue powder through polyglutamic acid and polygalacturonic acid, survives for a long time and can continuously provide diversified microbial community for soil. Meanwhile, the microbial community taking the network matrix as the main component can effectively increase the porosity of soil, improve the air permeability, effectively solve the problem of soil hardening and improve the micro-ecological environment.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a diagram illustrating the effect of the acid-reducing particles prepared according to the first embodiment of the present invention.
FIG. 2 is a diagram showing the inner effects of the microorganism pellet prepared in the first embodiment of the present invention after being sectioned.
Detailed Description
The invention is further illustrated by the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
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. The reagents or starting materials used in the present invention can be purchased from conventional sources, and unless otherwise specified, the reagents or starting materials used in the present invention can be used in a conventional manner in the art or in accordance with the product specifications. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention. The preferred embodiments and materials described herein are intended to be exemplary only.
In the following examples, the white mud is a byproduct produced in the alkali recovery process of paper-making enterprises, and the main component is CaCO3And Ca (OH)2And also contains a small amount of SiO2And Al2O3NaOH, etc.
In the following examples, the microbial bacterial powder was purchased from Weichafang Conn's Biotechnology Ltd, which mainly included Bacillus coagulans 4X 108Bacillus licheniformis 4 x 10 per gram8Bacillus laterosporus 1X 10/g8Per gram.
First embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 105 deg.C for 2 hr, placing in muffle furnace, calcining at 650 deg.C for 2.5 hr, wherein CaCO is the main component of white mud3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 30 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 85 parts by weight of the modified white mud powder prepared in the step (1), 16 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) Preparing juice waste residue powder: washing the waste residue after plough juicing with water for 3 times, drying at 65 deg.C until the water content is 15%, and grinding in a grinder for 15 min to obtain fruit juice waste residue powder for use.
(4) Preparing a microbial pellet: steam explosion treatment is carried out on 170 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 2.0MPa for 15 seconds, then the fruit juice waste residue powder, 4.5 parts by weight of polyglutamic acid and 7 parts by weight of polygalacturonic acid are mixed and evenly stirred, then 22 parts by weight of microbial powder are added and evenly stirred, and then the mixture is maintained for 14 hours under the conditions of 40 ℃ and relative humidity of 65%; and finally, adding 15 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(5) And mixing 55 parts by weight of the deacidification particles, 30 parts by weight of the microbial balls and 135 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Second embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 115 deg.C for 1 hr, placing in muffle furnace, calcining at 500 deg.C for 3 hr, and calcining to obtain CaCO as main ingredient3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 20 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 75 parts by weight of the modified white mud powder prepared in the step (1), 10 parts by weight of dicalcium ferrite and 15 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) Preparing juice waste residue powder: washing the apple juiced waste residue with water for 3 times, drying at 65 deg.C until the water content is 30%, and grinding in a grinder for 20 min to obtain fruit juice waste residue powder.
(4) Preparing a microbial pellet: steam explosion processing 165 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 1.2MPa for 25 seconds, then mixing with 3 parts by weight of polyglutamic acid and 5 parts by weight of polygalacturonic acid, uniformly stirring, then adding 12 parts by weight of microbial powder, uniformly stirring, and then maintaining for 20 hours at the temperature of 25 ℃ and the relative humidity of 60%; finally, 10 parts by weight of cellulose ether is added and evenly mixed, and then the mixture is granulated into balls to obtain the microbial balls with the size less than 5 mm for later use.
(5) And mixing 50 parts by weight of the deacidification particles, 25 parts by weight of the microbial balls and 120 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Third embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 100 deg.C for 3 hr, calcining at 750 deg.C for 2 hr in muffle furnace3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 10 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 70 parts by weight of the modified white mud powder prepared in the step (1), 12 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) Preparing juice waste residue powder: washing the pear juiced waste residue for 2 times, drying at 60 ℃ until the water content is 40%, and then grinding in a grinder for 25 minutes to obtain fruit juice waste residue powder for later use.
(4) Preparing a microbial pellet: performing steam explosion treatment on 160 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 2.4MPa for 5 seconds, then mixing with 4 parts by weight of polyglutamic acid and 6 parts by weight of polygalacturonic acid, uniformly stirring, then adding 10 parts by weight of microbial powder, uniformly stirring, and then maintaining for 15 hours at the temperature of 55 ℃ and the relative humidity of 90%; and finally adding 13 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(5) And mixing 60 parts by weight of the deacidification particles, 20 parts by weight of the microbial balls and 140 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Fourth embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 90 deg.C for 3 hr, calcining at 600 deg.C for 3 hr in muffle furnace, wherein CaCO is the main component of white mud3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 40 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 90 parts by weight of the modified white mud powder prepared in the step (1), 20 parts by weight of dicalcium ferrite and 30 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) Preparing juice waste residue powder: washing the residues obtained after apple juicing with water for 2 times, drying at 60 deg.C until the water content is 20%, and grinding in a grinder for 20 min to obtain fruit juice residue powder.
(4) Preparing a microbial pellet: performing steam explosion treatment on 180 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 1.8MPa for 20 seconds, then mixing the fruit juice waste residue powder with 5 parts by weight of polyglutamic acid and 10 parts by weight of polygalacturonic acid, uniformly stirring, adding 30 parts by weight of microbial powder, uniformly stirring, and then maintaining for 10 hours at the temperature of 40 ℃ and the relative humidity of 65%; and finally, adding 20 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(5) And mixing 70 parts by weight of the deacidification particles, 40 parts by weight of the microbial balls and 160 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Fifth embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing the deacidification particles: mixing 16 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator for granulation and balling to obtain deacidified particles for later use.
(2) Preparing juice waste residue powder: washing the juiced residue of juicy peach with water for 3 times, drying at 65 deg.C until the water content is 15%, and grinding in a grinder for 15 min to obtain juice residue powder.
(3) Preparing a microbial pellet: steam explosion treatment is carried out on 170 parts by weight of the fruit juice waste residue powder prepared in the step (2) under the pressure of 2.0MPa for 15 seconds, then the fruit juice waste residue powder, 4.5 parts by weight of polyglutamic acid and 7 parts by weight of polygalacturonic acid are mixed and evenly stirred, then 22 parts by weight of microbial powder are added and evenly stirred, and then the mixture is maintained for 14 hours under the conditions of 40 ℃ and relative humidity of 65%; and finally, adding 15 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(4) And mixing 55 parts by weight of the deacidification particles, 30 parts by weight of the microbial balls and 135 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Sixth embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing white mud powder: and drying the white mud at 105 ℃ for 2 hours, cooling to room temperature after the drying, and then placing the white mud in a grinding machine for grinding for 30 minutes to obtain white mud powder for later use.
(2) Preparing the deacidification particles: mixing 85 parts by weight of the white mud powder prepared in the step (1), 16 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture in a granulator for granulation to obtain deacidification particles for later use.
(3) Preparing juice waste residue powder: washing the juiced residue of juicy peach with water for 3 times, drying at 65 deg.C until the water content is 15%, and grinding in a grinder for 15 min to obtain juice residue powder.
(4) Preparing a microbial pellet: steam explosion treatment is carried out on 170 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 2.0MPa for 15 seconds, then the fruit juice waste residue powder, 4.5 parts by weight of polyglutamic acid and 7 parts by weight of polygalacturonic acid are mixed and evenly stirred, then 22 parts by weight of microbial powder are added and evenly stirred, and then the mixture is maintained for 14 hours under the conditions of 40 ℃ and relative humidity of 65%; and finally, adding 15 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(5) And mixing 55 parts by weight of the deacidification particles, 30 parts by weight of the microbial balls and 135 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Seventh embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 105 deg.C for 2 hr, placing in muffle furnace, calcining at 650 deg.C for 2.5 hr, wherein CaCO is the main component of white mud3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 30 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 85 parts by weight of the modified white mud powder prepared in the step (1) with 20 parts by weight of water, uniformly stirring, and placing the obtained mixture in a granulator for granulation and balling to obtain deacidified particles for later use.
(3) Preparing juice waste residue powder: washing the juiced residue of juicy peach with water for 3 times, drying at 65 deg.C until the water content is 15%, and grinding in a grinder for 15 min to obtain juice residue powder.
(4) Preparing a microbial pellet: steam explosion treatment is carried out on 170 parts by weight of the fruit juice waste residue powder prepared in the step (3) under the pressure of 2.0MPa for 15 seconds, then the fruit juice waste residue powder, 4.5 parts by weight of polyglutamic acid and 7 parts by weight of polygalacturonic acid are mixed and evenly stirred, then 22 parts by weight of microbial powder are added and evenly stirred, and then the mixture is maintained for 14 hours under the conditions of 40 ℃ and relative humidity of 65%; and finally, adding 15 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(5) And mixing 55 parts by weight of the deacidification particles, 30 parts by weight of the microbial balls and 135 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Eighth embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 105 deg.C for 2 hr, placing in muffle furnace, calcining at 650 deg.C for 2.5 hr, wherein CaCO is the main component of white mud3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 30 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 85 parts by weight of the modified white mud powder prepared in the step (1), 16 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) 55 parts by weight of the deacidification particles prepared in the embodiment and 135 parts by weight of the compost are mixed and uniformly stirred, and the acid soil remediation agent is obtained.
Ninth embodiment
A preparation method of an acidic soil remediation agent comprises the following steps:
(1) preparing modified white mud powder: drying white mud at 105 deg.C for 2 hr, placing in muffle furnace, calcining at 650 deg.C for 2.5 hr, wherein CaCO is the main component of white mud3And Ca (OH)2Decomposed into CaO. And after the calcination is finished, cooling to room temperature, and then placing the mixture into a grinder to grind for 30 minutes to obtain modified white mud powder for later use.
(2) Preparing the deacidification particles: and (2) mixing 85 parts by weight of the modified white mud powder prepared in the step (1), 16 parts by weight of dicalcium ferrite and 20 parts by weight of water, uniformly stirring, and placing the obtained mixture into a granulator to granulate into balls to obtain deacidification particles for later use.
(3) Preparing a microbial pellet: mixing 4.5 parts by weight of polyglutamic acid and 7 parts by weight of polygalacturonic acid, uniformly stirring, adding 22 parts by weight of microbial powder, uniformly stirring, and then maintaining for 14 hours at 40 ℃ and relative humidity of 65%; and finally, adding 15 parts by weight of cellulose ether, uniformly mixing, and granulating to form balls to obtain the microbial balls with the size of less than 5 mm for later use.
(4) And mixing 55 parts by weight of the deacidification particles, 30 parts by weight of the microbial balls and 135 parts by weight of the compost prepared in the embodiment, and uniformly stirring to obtain the acidic soil remediation agent.
Performance testing
1. The physical effect diagrams of the acid reducing particles and the acid soil remediation agent prepared in the first embodiment are respectively shown in fig. 1 and fig. 2, and it can be seen that the acid reducing particles and the acid soil remediation agent have granular structures.
2. The soil conditioner prepared in the embodiment is added into a plough layer according to the application amount of 1500 kg/mu, and the change rule of the pH value of the soil is measured by using a Topytonne TZS-pH-IG soil pH value tester. And (3) determining the change rule of the total nitrogen of the soil by using a TY-GZN high-precision intelligent soil fertilizer nutrient detector. The Shannon diversity index of soil was determined to characterize biocenomic diversity (the larger the index, the higher the diversity), and the soil microbial population formation information was determined using the Illumina Miseq sequencing platform for 16srDNA assay, followed by processing of the assay data using Microsoft Excel to obtain the Shannon diversity index (the larger the index, the higher the diversity). As shown in tables 1-3, it can be seen that the acid soil remediation agents prepared in the first to fourth examples have significantly higher remediation capability for soil pH than the acid soil remediation agents prepared in the fifth to ninth examples.
TABLE 1 soil pH
| Initial | 10 days | 20 days | 30 days | 60 days | 120 days | |
| First embodiment | 4.72 | 5.49 | 6.27 | 6.21 | 6.20 | 6.15 |
| Second embodiment | 4.72 | 5.21 | 6.19 | 6.18 | 6.23 | 6.10 |
| Third embodiment | 4.72 | 5.33 | 6.22 | 6.18 | 6.18 | 6.20 |
| Fourth embodiment | 4.72 | 4.26 | 6.15 | 6.13 | 6.11 | 6.19 |
| Fifth embodiment | 4.72 | 5.74 | 4.75 | 4.73 | 4.68 | 4.79 |
| Sixth embodiment | 4.72 | 5.01 | 5.12 | 5.14 | 5.09 | 4.99 |
| Seventh embodiment | 4.72 | 5.82 | 6.59 | 6.30 | 5.98 | 5.27 |
| Eighth embodiment | 4.72 | 5.47 | 6.25 | 6.17 | 6.17 | 6.02 |
| Ninth embodiment | 4.72 | 5.47 | 6.23 | 6.15 | 6.02 | 6.08 |
TABLE 2 law of change of total nitrogen in soil (unit: g/kg)
| Initial | 10 days | 20 days | 30 days | 60 days | 120 days | |
| First embodiment | 0.82 | 1.02 | 1.58 | 1.63 | 1.61 | 1.64 |
| Second embodiment | 0.82 | 1.07 | 1.63 | 1.69 | 1.65 | 1.64 |
| Third embodiment | 0.82 | 1.01 | 1.60 | 1.64 | 1.64 | 1.63 |
| Fourth embodiment | 0.82 | 1.02 | 1.63 | 1.71 | 1.63 | 1.64 |
| Fifth embodiment | 0.82 | 0.98 | 1.56 | 1.62 | 1.57 | 1.48 |
| Sixth embodiment | 0.82 | 0.93 | 1.43 | 1.59 | 1.55 | 1.42 |
| Seventh embodiment | 0.82 | 0.98 | 1.46 | 1.57 | 1.52 | 1.40 |
| Eighth embodiment | 0.82 | 0.98 | 1.39 | 1.49 | 1.40 | 1.28 |
| Ninth embodiment | 0.82 | 1.02 | 1.41 | 1.51 | 1.43 | 1.33 |
TABLE 3 Shannon diversity index characterization of biocenomic diversity
| Initial | 10 days | 20 days | 30 days | 60 days | 120 days | |
| First embodiment | 9.23 | 9.37 | 9.57 | 9.79 | 9.75 | 9.75 |
| Second embodiment | 9.23 | 9.35 | 9.59 | 9.81 | 9.77 | 9.73 |
| Third embodiment | 9.23 | 9.39 | 9.62 | 9.82 | 9.79 | 9.79 |
| Fourth embodiment | 9.23 | 9.33 | 9.64 | 9.75 | 9.79 | 9.78 |
| Fifth embodiment | 9.23 | 9.31 | 9.34 | 9.39 | 9.33 | 9.29 |
| Sixth embodiment | 9.23 | 9.36 | 9.37 | 9.36 | 9.31 | 9.27 |
| Seventh embodiment | 9.23 | 9.31 | 9.37 | 9.34 | 9.32 | 9.34 |
| Eighth implementationExample (b) | 9.23 | 9.25 | 9.22 | 9.26 | 9.21 | 9.20 |
| Ninth embodiment | 9.23 | 9.24 | 9.22 | 9.23 | 9.23 | 9.19 |
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An acidic soil remediation agent, which comprises the following components in parts by weight: 20-40 parts of microbial pellets, 50-70 parts of deacidification particles and 120-160 parts of organic fertilizer; wherein:
the microbial sphere comprises: the microbial agent comprises a network matrix, polyglutamic acid, polygalacturonic acid, microbial powder and cellulose ether, wherein microorganisms in the microbial powder are attached to the network matrix;
the acid reducing particles comprise: modified white mud, dicalcium ferrite and water;
the modified white mud refers to white mud powder with an active ingredient comprising calcium oxide.
2. The acidic soil remediation agent of claim 1 wherein the microbial pellet is a particulate comprising 160-180 parts by weight of a network matrix, 3-5 parts by weight of polyglutamic acid, 5-10 parts by weight of polygalacturonic acid, 10-30 parts by weight of microbial powder, 10-20 parts by weight of cellulose ether.
3. The acidic soil remediation agent of claim 1 wherein the acid reducing particulates are particulate matter comprising, by weight, 70 to 90 parts modified white mud, 10 to 20 parts dicalcium ferrite, and 15 to 30 parts water.
4. The acidic soil remediation agent of claim 1, wherein the microorganisms in said microbial powder comprise: at least one of bacillus subtilis, bacillus licheniformis and bacillus laterosporus.
5. The acidic soil remediation agent of claim 1 wherein said network matrix comprises fruit juice waste meal, preferably waste meal dried after juicing at least one of apple and pear.
6. The acidic soil remediation agent of any one of claims 1 to 5, wherein said organic fertilizer comprises: at least one of compost, cake manure, green manure, biogas manure and animal manure and urine manure.
7. The method of preparing an acidic soil remediation agent of any one of claims 1 to 6 including the steps of:
preparing modified white mud powder: calcining the lime mud to obtain CaCO3、Ca(OH)2Decomposing into active ingredient CaO, and grinding to obtain modified white mud powder;
preparing the deacidification particles: mixing the modified white mud powder, dicalcium ferrite and water, and granulating to obtain deacidification particles;
preparing a microbial pellet: performing steam explosion treatment on the network matrix powder, then uniformly mixing the network matrix powder with the polyglutamic acid, the polygalacturonic acid and the microbial powder, maintaining, then adding the cellulose ether, uniformly mixing and granulating to obtain a microbial pellet;
and mixing the deacidification particles, the microbial balls and the organic fertilizer in proportion to obtain the acid soil remediation agent.
8. The method of claim 7 wherein said lime mud, if not dried, is dried at 90-115 ℃ for 1-3 hours prior to calcination;
alternatively, the calcination conditions are: calcining for 2-3 hours at 500-750 ℃, and then grinding for 10-40 minutes to obtain the product.
9. The method of claim 7 wherein said step (3) of preparing said network matrix powder comprises: washing and drying the fruit juice waste residues until the water content is 15-40%, and grinding to obtain fruit juice waste residue powder, namely the network matrix;
or, the steam explosion treatment refers to performing steam explosion treatment on the fruit juice waste residue powder at the pressure of 1.2-2.4 MPa for 5-25 seconds;
or, in the step (3), the curing conditions are as follows: curing for 10-20 hours at the temperature of 25-55 ℃ and the relative humidity of 60-90%.
10. The use of the acidic soil remediation agent of any one of claims 1 to 6 or the acidic soil remediation agent obtained by the preparation method of any one of claims 7 to 9 in the fields of agricultural engineering and environmental engineering.
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