CN107267151B - Soil conditioner and preparation method thereof - Google Patents

Soil conditioner and preparation method thereof Download PDF

Info

Publication number
CN107267151B
CN107267151B CN201710623164.3A CN201710623164A CN107267151B CN 107267151 B CN107267151 B CN 107267151B CN 201710623164 A CN201710623164 A CN 201710623164A CN 107267151 B CN107267151 B CN 107267151B
Authority
CN
China
Prior art keywords
soil conditioner
percent
bentonite
soil
dolomite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710623164.3A
Other languages
Chinese (zh)
Other versions
CN107267151A (en
Inventor
蒋奇晋
吕书记
Original Assignee
蒋奇晋
吕书记
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 蒋奇晋, 吕书记 filed Critical 蒋奇晋
Priority to CN201710623164.3A priority Critical patent/CN107267151B/en
Publication of CN107267151A publication Critical patent/CN107267151A/en
Application granted granted Critical
Publication of CN107267151B publication Critical patent/CN107267151B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00Soil-conditioning materials or soil-stabilising materials
    • C09K17/02Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
    • C09K17/10Cements, e.g. Portland cement
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2101/00Agricultural use
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2109/00MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation

Abstract

The invention relates to a soil conditioner, which is prepared from the following raw materials in percentage by weight: 10 to 40 percent of Portland cement clinker, 20 to 30 percent of limestone, 10 to 30 percent of dolomite, 5 to 15 percent of sepiolite, 1 to 10 percent of zeolite, 1 to 10 percent of bentonite, 3 to 8 percent of iron ore and 1 to 10 percent of active carbon. The invention also relates to a preparation method of the soil conditioner, which comprises the following steps: (1) crushing limestone and dolomite, calcining in a kiln, and then discharging and cooling; (2) crushing, grinding and heating sepiolite, zeolite, bentonite, iron ore and active carbon, then discharging and cooling; (3) and (3) mixing the materials obtained in the step (1) and the step (2) with silicate cement clinker, grinding and sieving to obtain the soil conditioner. The soil conditioner provided by the invention can improve soil acidification, inhibit crops from absorbing heavy metals and increase crop yield.

Description

Soil conditioner and preparation method thereof
Technical Field
The invention relates to the technical field of farmland soil improvement, in particular to a soil conditioner and a preparation method thereof.
Background
At present, soil acidification is aggravated due to a large amount of industrial activities and excessive application of farmland fertilizers in China, and the total amount and the effective state content of heavy metals in soil are increased due to the emission of industrial wastes, so that the content of the heavy metals in partial planted crops exceeds the standard. Therefore, the 'action plan for preventing and controlling soil pollution' was issued by the department of environmental protection in 2016, and a policy for controlling farmland soil with the general idea of ensuring the quality and safety of agricultural products is determined.
Although various soil conditioners can be used for improving soil quality in the market at present, the soil conditioners mainly solve the problems of soil acidification, salinization, hardening, excessive fertilization and the like, can not effectively reduce the negative effects of heavy metal pollution of soil on agricultural products in a targeted manner, and the quality safety of the agricultural products is still difficult to ensure.
Disclosure of Invention
Based on this, the present invention aims to provide a soil conditioner which can improve soil acidification, inhibit crops from absorbing heavy metals, and increase crop yield.
The technical scheme adopted by the invention is as follows:
a soil conditioner is prepared from the following raw materials in percentage by weight: 10 to 40 percent of Portland cement clinker, 20 to 30 percent of limestone, 10 to 30 percent of dolomite, 5 to 15 percent of sepiolite, 1 to 10 percent of zeolite, 1 to 10 percent of bentonite, 3 to 8 percent of iron ore and 1 to 10 percent of active carbon.
The Portland cement clinker is an important industrial cementing material in China, and mainly generates calcium silicate hydrate gel and calcium hydroxide after reacting with water, wherein the calcium silicate hydrate gel has stronger adsorption capacity on heavy metal ions; the main component of the limestone is calcium carbonate which generates calcium oxide after being calcined; the main component of dolomite is CaMg (CO)3)2Calcium oxide and magnesium oxide are generated after calcination; the sepiolite is a hydrated magnesium silicate clay mineral, has a large specific surface area, and is a clay mineral with the strongest adsorption capacity; zeolite is an aluminosilicate mineral which has adsorbability and is widely used as an adsorbent; the main component of bentonite is montmorillonite, which is also an aluminosilicate mineral and has adsorptivity and cation exchange performance; the iron ore contains iron simple substance and iron compound; activated carbon has a large specific surface area and a complicated pore structure, and is widely used as an adsorbent.
The soil conditioner provided by the invention reacts with water after being applied to soil, hydroxide such as calcium hydroxide and magnesium hydroxide generated by alkaline oxide and water can effectively neutralize the acidity of the soil and increase calcium and magnesium ions in the soil, calcium silicate gel generated by portland cement clinker can passivate and adsorb heavy metal ions in the soil, and sepiolite, zeolite, bentonite, iron ore and active carbon are compounded to have an adsorption effect on various heavy metal ions in the soil, so that the transfer of heavy metals to crops can be reduced, the absorption of the crops on the heavy metals is reduced, the physical and chemical properties of the soil are improved, and the growth of the crops is promoted.
The soil conditioner disclosed by the invention is reasonable in formula, low in cost, convenient to use, capable of being prepared in advance and stored for later use, capable of improving farmland soil acidification, reducing heavy metal transfer in soil and reducing heavy metal content in crops, and is in line with national policy and policy guidelines for farmland soil pollution control, and has an important promotion effect on guaranteeing food safety of consumers.
Further, the soil conditioner is prepared from the following raw materials in percentage by weight: 35% of portland cement clinker, 25% of limestone, 10% of dolomite, 12% of sepiolite, 5% of zeolite, 5% of bentonite, 5% of iron ore and 3% of activated carbon.
Further, the soil conditioner is prepared from the following raw materials in percentage by weight: 25% of portland cement clinker, 20% of limestone, 15% of dolomite, 15% of sepiolite, 5% of zeolite, 10% of bentonite, 8% of iron ore and 2% of activated carbon.
Further, the lime saturation coefficient of the portland cement clinker is 0.70-0.90; the content of calcium oxide in the limestone is greater than or equal to 45%; the content of magnesium oxide in the dolomite is 15 to 35 percent.
Further, the bentonite is one or more of calcium bentonite, hydrogen bentonite and organic bentonite; the iron ore is one or more of limonite, goethite and hematite.
The invention also provides a preparation method of the soil conditioner, which comprises the following steps:
(1) crushing limestone and dolomite, calcining in a kiln, and then discharging and cooling;
(2) crushing, grinding and heating sepiolite, zeolite, bentonite, iron ore and active carbon, then discharging and cooling;
(3) and (3) mixing the materials obtained in the step (1) and the step (2) with silicate cement clinker, grinding and sieving to obtain the soil conditioner.
In the step (1), limestone is calcined to generate calcium oxide, and dolomite is calcined to generate calcium oxide and magnesium oxide; in the step (2), the crystal water in the material can be removed by heating and heat preservation, and enough pore structures are ensured to be used for adsorbing heavy metals.
Further, the step (1) is as follows: crushing limestone and dolomite into 3-5 cm, calcining in a kiln to 600-1000 ℃, and then discharging and cooling.
The limestone and the dolomite are crushed into lump materials with certain sizes, which is beneficial to improving the calcining efficiency, and the calcining temperature is limited, so that the limestone can be fully decomposed into calcium oxide, and the dolomite can be fully decomposed into calcium oxide and magnesium oxide.
Further, the step (2) is as follows: the sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground to 80-100 meshes, then heated to 80-300 ℃, kept warm for 0.5-3 hours, and then discharged and cooled.
The sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground into powder with a certain size, so that the uniform heating is facilitated, and the further grinding in the step (3) is facilitated. By limiting the range of the heating temperature and the heat preservation time, on one hand, the heating is ensured to be sufficient, the crystal water in the material is removed, the material has enough pore structure, the effect of adsorbing heavy metal is enhanced, and on the other hand, the crystal structure of the material is prevented from being damaged by excessive heating.
Further, the step (3) is as follows: and (3) mixing the materials obtained in the step (1) and the step (2) with silicate cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner. The grinding fineness of the soil conditioner is determined according to the viscosity of the soil, and the lower the viscosity of the soil is, the smaller the ground particles of the soil conditioner can be, so that the phenomenon of soil hardening during application is avoided.
The invention also provides a use method of the soil conditioner, which comprises the following steps: uniformly spreading 100-400 kg of soil conditioner in each mu of farmland, carrying out rotary tillage for 1-2 times, and planting crops after 2-5 days. Specifically, the pH value and the heavy metal content of the soil are measured before application, and the dosage of the soil conditioner is adjusted according to the measurement result.
Detailed Description
Example one
The following raw materials are weighed according to the weight ratio: 35% of portland cement clinker, 25% of limestone, 10% of dolomite, 12% of sepiolite, 5% of zeolite, 5% of bentonite, 5% of iron ore and 3% of activated carbon.
Crushing limestone and dolomite into 3-5 cm, calcining in a kiln to 800 ℃, and then discharging and cooling. The sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground into 80-100 meshes, then the mixture is heated to 100 ℃, the temperature is kept for 2 hours, and then the mixture is discharged and cooled. And mixing the materials obtained in the steps with portland cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner.
Measuring the pH value and the heavy metal content of the soil before application, uniformly spreading 100-400 kg of the prepared soil conditioner per mu according to the measurement result, and planting crops after 1-2 times of rotary tillage and 2-5 days of interval.
Example two
The following raw materials are weighed according to the weight ratio: 25% of portland cement clinker, 20% of limestone, 15% of dolomite, 15% of sepiolite, 5% of zeolite, 10% of bentonite, 8% of iron ore and 2% of activated carbon.
Crushing limestone and dolomite into 3-5 cm, calcining in a kiln to 1000 ℃, and then discharging and cooling. The sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground into 80-100 meshes, then heated to 200 ℃, kept warm for 1 hour, and then discharged and cooled. And mixing the materials obtained in the steps with portland cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner.
Measuring the pH value and the heavy metal content of the soil before application, uniformly spreading 100-400 kg of the prepared soil conditioner per mu according to the measurement result, and planting crops after 1-2 times of rotary tillage and 2-5 days of interval.
EXAMPLE III
The following raw materials are weighed according to the weight ratio: 10% of portland cement clinker, 30% of limestone, 30% of dolomite, 6% of sepiolite, 10% of zeolite, 1% of bentonite, 3% of iron ore and 10% of activated carbon.
Crushing limestone and dolomite into 3-5 cm, calcining the crushed limestone and dolomite in a kiln to 600 ℃, and then discharging and cooling. The sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground into 80-100 meshes, then the mixture is heated to 300 ℃, the temperature is kept for 0.5 hour, and then the mixture is discharged and cooled. And mixing the materials obtained in the steps with portland cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner.
Measuring the pH value and the heavy metal content of the soil before application, uniformly spreading 100-400 kg of the prepared soil conditioner per mu according to the measurement result, and planting crops after 1-2 times of rotary tillage and 2-5 days of interval.
Example four
The following raw materials are weighed according to the weight ratio: 40% of portland cement clinker, 20% of limestone, 20% of dolomite, 5% of sepiolite, 3% of zeolite, 5% of bentonite, 4% of iron ore and 3% of activated carbon.
Crushing limestone and dolomite into 3-5 cm, calcining in a kiln to 900 ℃, and then discharging and cooling. The sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground into 80-100 meshes, then heated to 80 ℃, kept warm for 3 hours, and then discharged and cooled. And mixing the materials obtained in the steps with portland cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner.
Measuring the pH value and the heavy metal content of the soil before application, uniformly spreading 100-400 kg of the prepared soil conditioner per mu according to the measurement result, and planting crops after 1-2 times of rotary tillage and 2-5 days of interval.
Effect test
The soil conditioners prepared in examples one to four were applied to rice plots each having an area of 30m as a test2According to each 667m2The application of 300kg of soil conditioner is repeated for three times to verify the effects of improving soil acidification, inhibiting heavy metal absorption of rice and increasing rice yield of the soil conditioner.
(1) Applying soil conditioner to test plot I
The basic physicochemical properties of the soil in the first test field before application of the soil conditioner are shown in table 1 below.
TABLE 1
After applying the soil conditioner, planting and harvesting the rice, detecting the pH value of the soil of the first test field, the yield of the paddy rice in the cell and the content of heavy metals in the produced brown rice, wherein specific detection results are shown in the following table 2.
TABLE 2
(2) Application of soil conditioner to test plot II
The soil basic physicochemical properties of test plot two are shown in table 3 below.
TABLE 3
After applying the soil conditioner, planting and harvesting the rice, detecting the pH value of the soil of the test field two, the yield of the paddy rice in the cell and the content of heavy metals in the produced brown rice, wherein specific detection results are shown in the following table 4.
TABLE 4
(3) Analysis of test results
As can be seen from comparison of tables 1 and 2 and comparison of tables 3 and 4, respectively, the soil pH values after application of the soil conditioners prepared in examples one to four were significantly improved compared to the soil pH before application of the soil conditioner.
As can be seen from tables 2 and 4, the soil acidification was significantly improved after the application of the soil conditioners prepared in examples one to four, as compared with the treatment without the application of the soil conditioner, at every 30m2The yield of the paddy in the area of the community is obviously increased, the content of five heavy metals of cadmium, lead, chromium, mercury and arsenic in the produced brown rice is also obviously reduced, and the inhibition effect on the transfer of the cadmium, lead and chromium to crops is better.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (9)

1. A soil conditioner characterized by: the composite material is prepared from the following raw materials in percentage by weight: 10 to 40 percent of Portland cement clinker, 20 to 30 percent of limestone, 10 to 30 percent of dolomite, 5 to 15 percent of sepiolite, 1 to 10 percent of zeolite, 1 to 10 percent of bentonite, 3 to 8 percent of iron ore and 1 to 10 percent of active carbon; the lime saturation coefficient of the portland cement clinker is 0.70-0.90; the content of calcium oxide in the limestone is greater than or equal to 45%; the content of magnesium oxide in the dolomite is 15 to 35 percent.
2. The soil conditioner of claim 1, wherein: the composite material is prepared from the following raw materials in percentage by weight: 35% of portland cement clinker, 25% of limestone, 10% of dolomite, 12% of sepiolite, 5% of zeolite, 5% of bentonite, 5% of iron ore and 3% of activated carbon.
3. The soil conditioner of claim 1, wherein: the composite material is prepared from the following raw materials in percentage by weight: 25% of portland cement clinker, 20% of limestone, 15% of dolomite, 15% of sepiolite, 5% of zeolite, 10% of bentonite, 8% of iron ore and 2% of activated carbon.
4. A soil conditioner as claimed in any one of claims 1 to 3, wherein: the bentonite is one or more of calcium bentonite, hydrogen bentonite and organic bentonite; the iron ore is one or more of limonite, goethite and hematite.
5. A method of preparing a soil conditioner as claimed in any one of claims 1 to 3, characterised by the steps of:
(1) crushing limestone and dolomite, calcining in a kiln, and then discharging and cooling;
(2) crushing, grinding and heating sepiolite, zeolite, bentonite, iron ore and active carbon, then discharging and cooling;
(3) and (3) mixing the materials obtained in the step (1) and the step (2) with silicate cement clinker, grinding and sieving to obtain the soil conditioner.
6. The method for preparing a soil conditioner according to claim 5, wherein: the step (1) is as follows: crushing limestone and dolomite into 3-5 cm, calcining in a kiln to 600-1000 ℃, and then discharging and cooling.
7. The method for preparing a soil conditioner according to claim 5, wherein: the step (2) is as follows: the sepiolite, the zeolite, the bentonite, the iron ore and the active carbon are crushed and ground to 80-100 meshes, then heated to 80-300 ℃, kept warm for 0.5-3 hours, and then discharged and cooled.
8. The method for preparing a soil conditioner according to claim 5, wherein: the step (3) is as follows: and (3) mixing the materials obtained in the step (1) and the step (2) with silicate cement clinker, grinding the mixture to 100-200 meshes, sieving the mixture to obtain the soil conditioner, and then inspecting, packaging and warehousing the soil conditioner.
9. A method of using a soil conditioner as claimed in any one of claims 1 to 3, characterised by the steps of: uniformly spreading 100-400 kg of soil conditioner in each mu of farmland, carrying out rotary tillage for 1-2 times, and planting crops after 2-5 days.
CN201710623164.3A 2017-07-27 2017-07-27 Soil conditioner and preparation method thereof Active CN107267151B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710623164.3A CN107267151B (en) 2017-07-27 2017-07-27 Soil conditioner and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710623164.3A CN107267151B (en) 2017-07-27 2017-07-27 Soil conditioner and preparation method thereof

Publications (2)

Publication Number Publication Date
CN107267151A CN107267151A (en) 2017-10-20
CN107267151B true CN107267151B (en) 2020-01-14

Family

ID=60078672

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710623164.3A Active CN107267151B (en) 2017-07-27 2017-07-27 Soil conditioner and preparation method thereof

Country Status (1)

Country Link
CN (1) CN107267151B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019114272A1 (en) * 2017-12-11 2019-06-20 陈秋玲 Method for preparing soil treating agent for reducing acidity
WO2019114273A1 (en) * 2017-12-11 2019-06-20 陈秋玲 Method for preparing soil treating agent
CN108728102A (en) * 2018-05-11 2018-11-02 湖南农业大学 Building waste base passivator and preparation method thereof
CN108659846A (en) * 2018-05-11 2018-10-16 湖南农业大学 Passivating method of the building waste base passivator to soil heavy metal cadmium
CN108795430A (en) * 2018-05-22 2018-11-13 北京市农林科学院 A kind of renovation agent and soil remediation method of cadmium pollution soil
CN108865157A (en) * 2018-06-14 2018-11-23 中国恩菲工程技术有限公司 The reparation medicament and restorative procedure of heavy-metal contaminated soil
CN108841394A (en) * 2018-06-19 2018-11-20 合肥职业技术学院 A kind of soil-repairing agent and preparation method thereof based on garden waste and gangue
CN109456125A (en) * 2018-07-06 2019-03-12 航天凯天环保科技股份有限公司 A kind of charcoal base soil conditioner and its application
CN111087265A (en) * 2018-10-22 2020-05-01 江门市浩伦生态农业有限公司 Acid soil conditioner for grape planting and preparation process thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102295933A (en) * 2011-07-01 2011-12-28 浙江大学 Special stabilizing agent for chromium polluted soil
CN103922866A (en) * 2013-01-11 2014-07-16 海拓(北京)矿物肥料有限公司 Soil conditioner and preparation method thereof
CN105199737A (en) * 2015-10-28 2015-12-30 雷志刚 Soil conditioner used for treating heavy metal pollution
CN105316000A (en) * 2014-07-07 2016-02-10 山东乾坤环境工程科技有限公司 Preparation method of medicine for remediation of heavy metal-polluted soil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2154532C (en) * 1995-07-24 2004-06-29 Jeffrey P. Newton Method of soil remediation
JP4562929B2 (en) * 2001-02-14 2010-10-13 東武化学株式会社 Cement composition
JP4074857B2 (en) * 2004-01-27 2008-04-16 東武化学株式会社 Soil solidifying agent
CN1315749C (en) * 2004-09-14 2007-05-16 中国建筑材料科学研究院 High strength silicate clinker and its preparing method
JP2008231389A (en) * 2007-03-20 2008-10-02 Nagara Bionics Kk Soil depurating and stabilizing agent

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102295933A (en) * 2011-07-01 2011-12-28 浙江大学 Special stabilizing agent for chromium polluted soil
CN103922866A (en) * 2013-01-11 2014-07-16 海拓(北京)矿物肥料有限公司 Soil conditioner and preparation method thereof
CN105316000A (en) * 2014-07-07 2016-02-10 山东乾坤环境工程科技有限公司 Preparation method of medicine for remediation of heavy metal-polluted soil
CN105199737A (en) * 2015-10-28 2015-12-30 雷志刚 Soil conditioner used for treating heavy metal pollution

Also Published As

Publication number Publication date
CN107267151A (en) 2017-10-20

Similar Documents

Publication Publication Date Title
CN104845626B (en) For administering the passivator of heavy-metal contaminated soil and its preparation and application
CN107142112B (en) Biochar soil conditioner and preparation method thereof
CN105802637B (en) A kind of soil heavy metal passivant and preparation method and the passivating method to Cadmium in Soil
US10633588B2 (en) Preparation and use of slow-release iron-based biochar soil heavy metal passivator
CN104788265B (en) Salt-soda soil biological modification fertilizer and its preparation based on high sulfur coal gangue
CN103756684B (en) A kind of soil conditioner with multiple benefits
US10131840B2 (en) Method for preparing iron silicon sulfur multi-element composite biochar soil heavy metal conditioner
CN105950159B (en) A kind of functionalization soil conditioner and preparation method thereof
CN103408377B (en) Multifunctional compound fertilizer
CN107446588B (en) Humic acid type acid soil conditioner and preparation method and application thereof
CN107446589B (en) Acid soil cadmium passivator and application thereof
CN109122136B (en) Method for safely producing rice on medium and light heavy metal polluted soil
CN102180734B (en) Compound fertilizer capable of reducing cadmium content in rice with overproof cadmium and preparation method thereof
CN102249797B (en) Slow release material using modified zeolite as carrier, and preparation method and application thereof
CN103131424B (en) Saline alkali soil conditioner
CN104072306B (en) A kind of stable form fertilizer rich in selenium and preparation method thereof
CN107350281A (en) One kind is applied to northern farmland soil of sewage irrigation area passivator and its application process
CN105462596B (en) A kind of saline-alkali land soil conditioner and the preparation method and application thereof
CN107384427B (en) Efficient composite stabilizer for mercury-contaminated soil and mercury-contaminated soil remediation method
CN107652981B (en) Composite passivator for reducing cadmium pollution of rape field soil and preparation method and application thereof
CN102617251A (en) Selenium-rich composite organic fertilizer and preparing method thereof
CN100515966C (en) Method for treating sludge heavy metal
KR100996498B1 (en) A promoter for growing plants, and a growing method of a plat by using the same
EP2882825B1 (en) . product and process for the intensification of plant cultivation and increase plant fertillity
CN102070371B (en) Environmentally-friendly natural multielement rock fertilizer

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant