CN103642501A - Saline-alkali soil improving agent - Google Patents
Saline-alkali soil improving agent Download PDFInfo
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- CN103642501A CN103642501A CN201310715527.8A CN201310715527A CN103642501A CN 103642501 A CN103642501 A CN 103642501A CN 201310715527 A CN201310715527 A CN 201310715527A CN 103642501 A CN103642501 A CN 103642501A
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Abstract
The invention belongs to the technical field of saline-alkali soil improvement and particularly relates to a saline-alkaline soil improving agent. The saline-alkali soil improving agent is characterized by comprising the following raw materials in parts by weight: 10-15 parts of flue gas desulfurization wastes, 20-30 parts of mixed grass meal, 3-8 parts of compound microorganisms, 5-15 parts of sawdust, 6-15 parts of sweet clover root powder and 10-15 parts of kieselguhr, wherein the mixed grass meal consists of sainfoin, symphytum officinale, coronilla varia and festuca arundinacea, and the compound microorganisms consist of nitrogen-fixing bacteria, Bacillus subtilis, bacillus licheniformis and bacillus mucilaginosus. The improving agent disclosed by the invention not only can greatly and effectively improve the current situations of saline-alkali soil, but also can utilize wastes and recycle resources and ecological vegetation, and is environment-friendly, safe and free of secondary pollution problem.
Description
Technical field
The technical field that the invention belongs to alkaline land soil improvement, is specifically related to a kind of saline-alkali land soil conditioner.
Background technology
Saline-alkali soil is the class soil that salinization or alkalization form, and comprises solonchak, alkaline earth and various salinized soil.In arid
And semiarid zone, contained salinity in underearth and underground water, due to evaporation from land effect, along with soil capillarity makes
The surface layer that is raised to waterborne of contained salinity, after moisture evaporation, makes salinity stay upper soll layer, builds up and formation saltings.Strand
Area is because resident seawater is invaded stain, and saltings is distributed more widely, and salt content is high, gathers too much solvable in upper soll layer or the soil body
Property salt.How dry saltings surface soil is, is white in color, and even forms salt incrustation, the be full of cracks of hardening, and salinity is high, and corrodibility is strong, can destroy plant cell tissue, hinders plant-growth, and high salinity degree soil even can directly make root system of plant rot to cause plant dead.
The formation of China's alkaline earth and alkali-affected soil, most of relevant with the accumulative total of Carbonates In Soil, basicity is generally higher, and serious salt affected soil regional plant almost can not be survived.Saltings utilizing in the middle of process, is simply said, can be divided into light saltings, moderate saltings and heavy saline.Light saltings refers to emerging very likely of it, and saltiness is below 3/1000ths; Heavy saline refers to that its saltiness surpasses 6/1000ths, and seedling rate is lower than 50%, and moisture in soil pH value surpasses 8.5, causes soil compaction, and the root system of crop is had to restraining effect, crop is not grown or grow unhealthy; Moderate saltings is between between the two.At present along with scientific and technical development, should only not see disadvantageous one side, more it should be regarded as to very precious land resources, because there are many biologies to comprise plant, comprise microorganism, can adapt to this environment, and increasing scientific worker just puts among the work of administering saltings with the enthusiasm of having one's bosom filled with, the work of administering saltings is bound to obtain final triumph.
Accessories during Binzhou is positioned at the inner edge in fan section, the Huanghe delta, inside faces the Yellow River, the external Bohai Sea, and its soil can be divided into three major types: alkaline soil, saline soil, sand.From the Huanghe valley more close to, its saline and alkaline is lower.Industrial sewage is irrigated the pollution to soil.According to incompletely statistics, in Binzhou Prefecture, sewage irrigation area accounts for 10% of the total area, outside industry (papermaking, printing and dyeing, chemical industry etc.) sewage organic matter removal content, contain the metal ions such as ammonia-state nitrogen, nitric nitrogen, nitrite nitrogen and lead, copper, the enrichment in soil of these objectionable impuritiess, causes soil pollution.Irrigation District of Sewage, Xiaoqinghe River two sides particularly, in soil, above-mentioned metal ion all detects, and higher close to more from riverbank.The pollution of oil-field development to soil.Accessories during Binzhou is the exploitation base of Shengli Oil Field, and thousands of mouthfuls of oil wells, water-injection plant, test satellite location, oil gathering station, storage tank are looked visible.Every dozen of a bite wells take up an area 0.2hm2 at least, nearly 1hm2 at most, before and after drilling well exploitation, a large amount of mud, landwaste, ground crude oil, pressure break agent, well-flushing acidizing fluid the like waste are piled up well site, long-term weathering losss that drench with rain, in mud, the objectionable impurities immersion soil such as oil, phenol, chromium causes secondary pollution, and not only this season farm crop are had no harvest, and in 2～3a, have a strong impact on crop growth later, run into blowout and line fracture, substantial oil lands, and directly causes working district soil compaction accumulation of salt in the surface soil alkalization.
At present the ameliorative measure in saltings is mainly contained to following three kinds:
(1) physical method improvement saltings
Physically improved is exactly to adopt the method for some physics to carry out transformation salinity soil, as adopted irrigation and drainage system, flushing desalination,
The methods such as Song Geng, pressure sand, reach the object that improvement utilizes.Wherein, take drip washing salt discharge is that main engineering measure is external saltings
The Main Means of administering, i.e. the irrigation and drainage system of Erecting and improving, the target improve the soil in conjunction with ploughing deeply, the measure such as soil removal and replacement, drip washing, alluvial reaching reduction arable layer saliferous.Although engineering measure application is comparatively extensive, exist that the amount of labour used is large, input cost is high, it is limited to hold time or be limited to the series of problems such as water resources anxiety, and can not fundamentally reduce soil salt, must be in conjunction with other
Measure is carried out.Duan Dengxuan etc. (2000) work out at saline-alkali wetland and carry out film every saline and alkaline engineering measure, utilize plastics
The effect of film water proof, blocks the path of saline and alkaline rising, reaches the effect of stablizing salt reduction alkali, but plastics film is difficult to degraded, band
Carry out the secondary pollution problem in soil.
In order reaching, to control the evaporation of soil surface moisture, to alleviate salt and alkali component to the object of earth's surface enrichment, developed a series of earth's surfaces and covered measure.For example stalk covers, cauline leaf chopping covers or stubble covers, membrane covering cement duricrust covers, asphalt emulsion covers etc., and these methods have even played good effect aspect improvement of soil fertility suppressing evaporation from topsoil, but or because becoming
This is too high, output is too low, or because of secondary pollution, or because being subject to resource limit, can not really promote aborning.
(2) chemical process improvement saltings
Chemical modifying is exactly that some acid salts substances of application are improved the character in saltings, reduces the potential of hydrogen of soil, increases
The positively charged ion replacement ability that adds soil, the saltiness of reduction soil, the activity of enhancing Soil Microorganism and enzyme, promotes plant
Root growth.Improve the physical properties of soil, increase soil aggregate, coordinate soil water fat gas heat, increase soil fertility.
(3) biological method improvement saltings
Traditional biological control measure improvement saltings, uses plant improvement saltings, easy to implement the method, remarkable in economical benefits.
Biological control measure can change the physical property of soil gradually, and Soil structure is changed, and it is loose that quality becomes, and ventilative and water storage capacity strengthens.
Due to the needs of coastland rapid economic development, the positive Devoting Major Efforts To Developing in part saltings, therefore also more and more obtains people's attention to the improvement of alkaline land soil in recent years.There are some researches show that the low-solubility calcium salts such as gypsum, desulfurated plaster, calcium sulfite have significant alkaline land soil improving effect, after applying, can effectively promote the growth of plant, reduce soil pH and sodium potassium content.But these present methods are all with a large amount of consumption of natural resource; picked-up natural material or passed through that natural processing and manufacturing forms; cannot meet the requirement of environment protection and recycling economy, therefore finding a kind of technological method that utilizes waste or recovery resource to carry out alkaline land improving is that the key point breaking through is badly in need of in this field.
Summary of the invention
The object of the invention is to for the defect of above-mentioned existence and a kind of saline-alkali land soil conditioner is provided, this modifying agent not only can greatly effectively improve the present situation of alkaline land soil, and utilize waste, reclaim resource and ecological natural vegetation, Environmental Safety, can not produce the problem of secondary pollution.
Technical scheme of the present invention is: a kind of saline-alkali land soil conditioner, is comprised of the raw material of following weight part:
10～15 parts of flue gas desulfurization wastes;
20～30 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue;
3～8 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus;
5～15 parts of wood powders;
6～15 parts of Melilotus suaveolens Ledeb. root powder;
10～15 parts of diatomite.
Described saline-alkali land soil conditioner, is comprised of the raw material of following weight part:
12 parts of flue gas desulfurization wastes;
26 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue;
7 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus;
15 parts of wood powders;
12 parts of Melilotus suaveolens Ledeb. root powder;
14 parts of diatomite.
The water content of described flue gas desulfurization waste is 170L/kg, this water content make flue gas desulfurization waste and wood powder fiting effect better, best to the improved effect of salinized soil.
In described mixing grass meal, sainfoin parts by weight are 35%, comfrey parts by weight are 25%, and coronule flower parts by weight are 20%, and alta fascue parts by weight are 20%, this blending ratio makes to mix grass meal no matter aspect nutrition, or Soil Desalting rate aspect is all reached to optimum regime.
In described complex microorganism, vinelandii parts by weight are 10%, Bacillus subtilus parts by weight are 35%, Bacillus licheniformis parts by weight are 20%, colloid bacillus cereus parts by weight are 35%, the cooperation of this complex microorganism, has built a best microflora, makes itself and other component jointly build the ecotope of harmonious and ordered, better incorporate in original edatope, thereby the sustainable use of this modifying agent is gone down.
The particle diameter of described mixing grass meal is 0.6～1.5mm, is beneficial to the absorption of former alkaline land soil.
The particle diameter of described wood powder is 0.5～1.2mm, is beneficial to the absorption of former alkaline land soil.
The particle diameter of described Melilotus suaveolens Ledeb. root powder is 1～2mm, and water ratio is 3%～6%.
Beneficial effect of the present invention is: saline-alkali land soil conditioner flue gas desulfurization waste of the present invention and wood powder compounding application, greatly improved soil, and pH value, soluble salt and the ESP of soil have remarkable reduction.Mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue, this mixing grass meal has obvious desalting, make saltings 0～20 cm, the average Soil Desalting rate of 0～100 cm soil layer reach respectively 55.1% and 43.3%, and can promote the formation of soil aggregate, improve soil physico-chemical property, the soil organism, available nitrogen are increased to some extent.Complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus, these microorganisms are all screened in the salt affected soil in Binzhou, can not cause ecological damage to local soil, these microorganisms coordinate jointly, mutually collaborative, can accelerate the formation of soil aggregate and the regeneration of soil nutrient and effectuation, thereby create good environment for follow-up plant-growth.Melilotus suaveolens Ledeb. root powder has some nutritive substances, as carbohydrate, phosphoric acid, protein etc. can be for mentioned microorganism existence, there are again some special chemical substances, as the degraded of the participation pollutents such as organic acid, phenols, promoter action has been played in dissolving to soil indissoluble material, promote the dissolving of the salts such as P, K, ca, thereby improved soil fertility comprehensively and promoted the growth of plant, formed whole microecosystem to eucyclic future development.Diatomite can effectively stick together said components.
Between raw material in saline-alkali land soil conditioner of the present invention, interact, mutually support collaborative, the ESP value of alkaline land soil is reduced to below 10%, and pH value can be reduced to below 8.0, and has increased the effect of the available nutrients such as N, P, K and replacement property K, Ca, Mg; Organic content is greater than 35%, the content of nitrogen is greater than 0.5% entirely.
Embodiment
Below by specific embodiment, the present invention will be described in detail.
Embodiment 1
A saline-alkali land soil conditioner, is comprised of the raw material of following weight part: 10 parts of flue gas desulfurization wastes, and the water content of this flue gas desulfurization waste is 170L/kg; 30 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue, and wherein sainfoin parts by weight are 35%, and comfrey parts by weight are 25%, and coronule flower parts by weight are 20%, and alta fascue parts by weight are 20%; 8 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus, and wherein vinelandii parts by weight are 10%, and Bacillus subtilus parts by weight are 35%, Bacillus licheniformis parts by weight are 20%, and colloid bacillus cereus parts by weight are 35%; 10 parts of wood powders; 8 parts of Melilotus suaveolens Ledeb. root powder; 11 parts of diatomite.
The particle diameter of described mixing grass meal is 1.2mm.
The particle diameter of described wood powder is 0.8mm.
The particle diameter of described Melilotus suaveolens Ledeb. root powder is 1.5mm, and water ratio is 4%.
After saline-alkali land soil conditioner described in employing the present embodiment, the ESP value of alkaline land soil is reduced to 8%, pH value and is reduced to 8.0.
Embodiment 2
A saline-alkali land soil conditioner, is comprised of the raw material of following weight part: 12 parts of flue gas desulfurization wastes, and the water content of this flue gas desulfurization waste is 170L/kg; 26 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue, and wherein sainfoin parts by weight are 35%, and comfrey parts by weight are 25%, and coronule flower parts by weight are 20%, and alta fascue parts by weight are 20%; 7 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus, and wherein vinelandii parts by weight are 10%, and Bacillus subtilus parts by weight are 35%, Bacillus licheniformis parts by weight are 20%, and colloid bacillus cereus parts by weight are 35%; 15 parts of wood powders; 12 parts of Melilotus suaveolens Ledeb. root powder; 14 parts of diatomite.
The particle diameter of described mixing grass meal is 1.5mm.
The particle diameter of described wood powder is 0.9mm.
The particle diameter of described Melilotus suaveolens Ledeb. root powder is 1.8mm, and water ratio is 5%.
After saline-alkali land soil conditioner described in employing the present embodiment, the ESP value of alkaline land soil is reduced to 9%, pH value and is reduced to 7.6.
Embodiment 3
A saline-alkali land soil conditioner, is comprised of the raw material of following weight part: 15 parts of flue gas desulfurization wastes, and the water content of this flue gas desulfurization waste is 170L/kg; 20 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue, and wherein sainfoin parts by weight are 35%, and comfrey parts by weight are 25%, and coronule flower parts by weight are 20%, and alta fascue parts by weight are 20%; 6 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus, and wherein vinelandii parts by weight are 10%, and Bacillus subtilus parts by weight are 35%, Bacillus licheniformis parts by weight are 20%, and colloid bacillus cereus parts by weight are 35%; 14 parts of wood powders; 10 parts of Melilotus suaveolens Ledeb. root powder; 13 parts of diatomite.
The particle diameter of described mixing grass meal is 1.3mm.
The particle diameter of described wood powder is 1.0mm.
The particle diameter of described Melilotus suaveolens Ledeb. root powder is 1.5mm, and water ratio is 4%.
After saline-alkali land soil conditioner described in employing the present embodiment, the ESP value of alkaline land soil is reduced to 8.5%, pH value and is reduced to 7.5.
Claims (8)
1. a saline-alkali land soil conditioner, is characterized in that, the raw material of following weight part, consists of:
10～15 parts of flue gas desulfurization wastes;
20～30 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue;
3～8 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus;
5～15 parts of wood powders;
6～15 parts of Melilotus suaveolens Ledeb. root powder;
10～15 parts of diatomite.
2. saline-alkali land soil conditioner according to claim 1, is characterized in that, the raw material of following weight part, consists of:
12 parts of flue gas desulfurization wastes;
26 parts are mixed grass meal, and this mixing grass meal is comprised of sainfoin, comfrey, coronule flower and alta fascue;
7 parts of complex microorganisms, this complex microorganism is comprised of vinelandii, Bacillus subtilus, Bacillus licheniformis and colloid bacillus cereus;
15 parts of wood powders;
12 parts of Melilotus suaveolens Ledeb. root powder;
14 parts of diatomite.
3. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, the water content of described flue gas desulfurization waste is 170L/kg.
4. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, in described mixing grass meal, sainfoin parts by weight are 35%, and comfrey parts by weight are 25%, and coronule flower parts by weight are 20%, and alta fascue parts by weight are 20%.
5. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, in described complex microorganism, vinelandii parts by weight are 10%, and Bacillus subtilus parts by weight are 35%, Bacillus licheniformis parts by weight are 20%, and colloid bacillus cereus parts by weight are 35%.
6. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, the particle diameter of described mixing grass meal is 0.6～1.5mm.
7. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, the particle diameter of described wood powder is 0.5～1.2mm.
8. according to saline-alkali land soil conditioner described in claim 1 or 2, it is characterized in that, the particle diameter of described Melilotus suaveolens Ledeb. root powder is 1～2mm, and water ratio is 3%～6%.
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Cited By (17)
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|---|---|---|---|---|
| CN105038801A (en) * | 2015-06-19 | 2015-11-11 | 成都普天泽科技有限公司 | Compound type soil improvement agent for saline alkali soil |
| CN105061117A (en) * | 2015-08-28 | 2015-11-18 | 张大奇 | Soil conditioner for treating saline-alkali soil |
| CN105602569A (en) * | 2015-09-21 | 2016-05-25 | 潍坊友容实业有限公司 | Saline-alkaline land improvement fertilizer |
| CN106242915A (en) * | 2016-08-29 | 2016-12-21 | 山东胜伟园林科技有限公司 | A kind of organic fertilizer utilizing bagasse fermentation preparation and the method for improvement Saline-alkali Land In Hetao Irrigation Region thereof |
| CN106316690A (en) * | 2016-08-24 | 2017-01-11 | 山东胜伟园林科技有限公司 | Method for produce liquid organic fertilizer with starch wastewater to improve saline and alkaline land |
| CN106398708A (en) * | 2016-08-28 | 2017-02-15 | 山东胜伟园林科技有限公司 | Yellow River irrigation area secondary salinization land conditioner, preparation method and application thereof |
| CN106561334A (en) * | 2016-11-08 | 2017-04-19 | 中国石油大学(北京) | Well drilling solid-phase waste disposal composition and application thereof |
| CN106986724A (en) * | 2017-04-20 | 2017-07-28 | 重庆工程职业技术学院 | A kind of soil-repairing agent in salt-soda soil and preparation method thereof |
| CN107201233A (en) * | 2017-06-23 | 2017-09-26 | 合肥市风达农业有限责任公司 | A kind of ecological, environmental protective soil conditioner and preparation method thereof |
| CN107325823A (en) * | 2017-08-16 | 2017-11-07 | 宁夏大学 | The soil conditioner and soil improvement method in a kind of salt-soda soil |
| CN108083953A (en) * | 2018-01-20 | 2018-05-29 | 斯科沃肥业（山东）有限公司 | A kind of saline-alkali land soil conditioner |
| CN108235838A (en) * | 2018-02-13 | 2018-07-03 | 鸿灌环境技术有限公司 | A kind of method of comprehensive improvement fertilizing salt affected soil |
| CN110606790A (en) * | 2019-09-12 | 2019-12-24 | 北京康地宝生物技术有限公司 | Soil improvement repairing agent and preparation method thereof |
| CN110999585A (en) * | 2019-12-02 | 2020-04-14 | 江苏凯帝农业科技发展有限公司 | Soil improvement method for large-scale fruit planting |
| US20220018557A1 (en) * | 2018-12-04 | 2022-01-20 | Renaud Green Technology Limited | Air purifying unit, air purifying device and air purifying assembly |
| CN114853552A (en) * | 2022-06-07 | 2022-08-05 | 新疆绿洲大洋生物科技有限公司 | Saline-alkali soil conditioner and preparation method and application thereof |
| CN115109595A (en) * | 2022-06-23 | 2022-09-27 | 北京晋荣农业科技有限公司 | Saline-alkali soil composite soil conditioner and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105038801A (en) * | 2015-06-19 | 2015-11-11 | 成都普天泽科技有限公司 | Compound type soil improvement agent for saline alkali soil |
| CN105061117A (en) * | 2015-08-28 | 2015-11-18 | 张大奇 | Soil conditioner for treating saline-alkali soil |
| CN105602569A (en) * | 2015-09-21 | 2016-05-25 | 潍坊友容实业有限公司 | Saline-alkaline land improvement fertilizer |
| CN106316690A (en) * | 2016-08-24 | 2017-01-11 | 山东胜伟园林科技有限公司 | Method for produce liquid organic fertilizer with starch wastewater to improve saline and alkaline land |
| CN106398708A (en) * | 2016-08-28 | 2017-02-15 | 山东胜伟园林科技有限公司 | Yellow River irrigation area secondary salinization land conditioner, preparation method and application thereof |
| CN106242915A (en) * | 2016-08-29 | 2016-12-21 | 山东胜伟园林科技有限公司 | A kind of organic fertilizer utilizing bagasse fermentation preparation and the method for improvement Saline-alkali Land In Hetao Irrigation Region thereof |
| CN106561334A (en) * | 2016-11-08 | 2017-04-19 | 中国石油大学(北京) | Well drilling solid-phase waste disposal composition and application thereof |
| CN106986724A (en) * | 2017-04-20 | 2017-07-28 | 重庆工程职业技术学院 | A kind of soil-repairing agent in salt-soda soil and preparation method thereof |
| CN107201233A (en) * | 2017-06-23 | 2017-09-26 | 合肥市风达农业有限责任公司 | A kind of ecological, environmental protective soil conditioner and preparation method thereof |
| CN107325823A (en) * | 2017-08-16 | 2017-11-07 | 宁夏大学 | The soil conditioner and soil improvement method in a kind of salt-soda soil |
| CN108083953A (en) * | 2018-01-20 | 2018-05-29 | 斯科沃肥业（山东）有限公司 | A kind of saline-alkali land soil conditioner |
| CN108235838A (en) * | 2018-02-13 | 2018-07-03 | 鸿灌环境技术有限公司 | A kind of method of comprehensive improvement fertilizing salt affected soil |
| US20220018557A1 (en) * | 2018-12-04 | 2022-01-20 | Renaud Green Technology Limited | Air purifying unit, air purifying device and air purifying assembly |
| CN110606790A (en) * | 2019-09-12 | 2019-12-24 | 北京康地宝生物技术有限公司 | Soil improvement repairing agent and preparation method thereof |
| CN110999585A (en) * | 2019-12-02 | 2020-04-14 | 江苏凯帝农业科技发展有限公司 | Soil improvement method for large-scale fruit planting |
| CN114853552A (en) * | 2022-06-07 | 2022-08-05 | 新疆绿洲大洋生物科技有限公司 | Saline-alkali soil conditioner and preparation method and application thereof |
| CN115109595A (en) * | 2022-06-23 | 2022-09-27 | 北京晋荣农业科技有限公司 | Saline-alkali soil composite soil conditioner and preparation method and application thereof |
| CN115109595B (en) * | 2022-06-23 | 2024-05-07 | 北京晋荣农业科技有限公司 | Saline-alkali soil composite soil conditioner and preparation method and application thereof |
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