CN108147922A - Reduce the method for rice field nitrous oxide emission and modification muck charcoal used - Google Patents
Reduce the method for rice field nitrous oxide emission and modification muck charcoal used Download PDFInfo
- Publication number
- CN108147922A CN108147922A CN201810014004.3A CN201810014004A CN108147922A CN 108147922 A CN108147922 A CN 108147922A CN 201810014004 A CN201810014004 A CN 201810014004A CN 108147922 A CN108147922 A CN 108147922A
- Authority
- CN
- China
- Prior art keywords
- charcoal
- muck
- modified
- preparation
- modification
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
Abstract
The invention discloses a kind of preparation methods of modified muck charcoal, include the following steps：Initial charcoal is prepared using muck；Initial charcoal is placed in container, is sealed after adding in modifying agent, fully shaking 1~7 day under the frequency of 150~300rmp；Then it is filtered by vacuum, drying to constant weight in 50~90 DEG C for the charcoal of recycling, obtains modified muck charcoal.The present invention also provides the method for reduction rice field nitrous oxide emission carried out using the modification muck charcoal that the above method is prepared simultaneously：Amount ratio of the muck charcoal according to 60 ± 10 tons of per hectares will be modified, modified muck charcoal is disposably added into rice field.Method using the present invention can significantly reduce the discharge of rice field nitrous oxide.
Description
Technical field
The present invention relates to rice soil Technology of Reducing Greenhouse Gas Emissions fields, and in particular to a kind of to be dropped using modified pig manure charcoal
The method of low rice field nitrous oxide emission.
Background technology
Global warming is the environmental problem of today's society common concern, nitrous oxide (N2O) it is used as a kind of greenhouse gas
Body, its warming effect are the 296 of carbon dioxide, and much larger than the warming effect of methane.Meanwhile N2O retaining in an atmosphere
Time is long, can cause depletion of the ozone layer, be detrimental to health.Farmland ecosystem is air N2One of important sources of O, according to system
Meter, farmland ecosystem is to N2The contribution of O discharges is equivalent to the 58% of human activity discharge.N in farmland2The discharge of O is by soil
Nitrification and denitrification are completed jointly, and in flooded soils, and denitrification is to N2The contribution of O releases is much larger than nitre
Change acts on.China's rice cultivated area is about 31,000,000 hectares, and rice total yield ranks first in the world.But paddy ecosystem by
In the long-term waterflooding environment for irrigating formation, cause microorganism denitrification strong, a large amount of nitrogenous fertilizer is converted into N2O gases and damage
It loses, and N2The discharge of O exacerbates the destruction of greenhouse effects and ozone layer, and environmental hazard can not be ignored.
Feces of livestock and poultry (based on the pig manure) total amount that China generates every year is 108Ton, and with the time increase yield by
Gradually rise.Using pig manure as organic fertilizer application to field, some negative effects can be generated.For example, nitrogen and phosphorus element in pig manure into
Entering water body can cause body eutrophication to pollute；There is safety in some self-contained pathogens of pig manure and heavy metal, chronic administration
Risk.Pig manure has been had been widely adopted by the method that pyrolysis generates charcoal.This method for pyrolysis had both solved a large amount of pigs
The reluctant problem of excrement, the charcoal being prepared have improvement and rehabilitating soil and other effects again.Charcoal is with pyrolysis temperature
The difference of degree, there are larger differences for itself physicochemical property.Low temperature pyrogenation (300 DEG C) pig manure charcoal and high temperature pyrolysis (700 DEG C)
Charcoal is compared, and has the characteristics that yield height, less energy consumption, organo-functional group abundance, active organic carbon content are high, therefore are reducing
The advantage of aluminium poison, absorption heavy metal, raising soil activation carbon storehouse and promotion crop yield etc. is significantly larger than high temperature pyrolysis life
Object charcoal.But low temperature pyrogenation pig manure charcoal is applied to paddy ecosystem and also there is dispute, because numerous studies proof is low
The application of warm pig manure charcoal can promote soil nitrification and denitrification, increase farmland ecosystem N2The discharge of O, from
And aggravate greenhouse effects.Especially in paddy ecosystem, soil is in long-term waterflooding state and along with the application of nitrogenous fertilizer,
The N of charcoal driving2O discharges are especially strong.Therefore, low temperature pyrogenation pig manure charcoal is applied into paddy ecosystem, though it can rise
To the effects that soil fertility improvement and contaminated soil remediation, it can also increase N2The discharge of O, causes the loss of nitrogenous fertilizer, and aggravates gas
It waits and becomes warm ozone layer destroying.Low temperature pyrogenation pig manure charcoal is modified, reduces N2The discharge of O, in farmland ecosystem temperature
Room gas abatement field is of great significance.
Therefore, it is necessary to the prior art is improved.
Invention content
The technical problem to be solved in the present invention is to provide a kind of method for reducing rice field nitrous oxide emission and used change
Property muck charcoal.
To solve the above-mentioned problems, the present invention provides a kind of preparation method of modified muck charcoal, includes the following steps：
S1, initial charcoal is prepared using muck；
S2, the initial charcoal that step S1 prepared to gained are placed in container, are sealed after adding in modifying agent, in 150~
Fully shaking 1~7 day under the frequency of 300rmp；Then it is filtered by vacuum, the charcoal (particle) of recycling is dried in 50~90 DEG C
Constant weight obtains modified muck charcoal.
The improvement of the preparation method of modification muck charcoal as the present invention：
Modifying agent is distilled water in the step S2, and the solid-liquid ratio of charcoal and distilled water is 1kg:4-6L is (preferably
1kg:5L)。
The another of the preparation method of modification muck charcoal as the present invention improves：
Modifying agent is acetone in the step S2, and the solid-liquid ratio of charcoal and acetone is 1g:9-11ml (preferably 1g:
10ml)。
The preparation method of modification muck charcoal as the present invention is further improved：
The method that the step S1 prepares initial charcoal is：
Muck is dried to moisture≤5% (quality %) in 100~110 DEG C, in anaerobic closed container in 300~
700 DEG C of isothermal pyrolysis 1~3 hour (preferably 2 hours), are then crushed to grain size≤3mm, obtain initial charcoal.
The muck is various Animal manures, for example, pig manure, chicken manure, cow dung etc..
The preparation method of modification muck charcoal as the present invention is further improved：
The step S1 carries out isothermal pyrolysis after being warming up to 300~700 DEG C with 20~30 DEG C/min of heating rate.
The preparation method of modification muck charcoal as the present invention is further improved：
It is 1~3 day that the time is shaken in the step S2, and concussion frequency is 200rmp；The charcoal (particle) of recycling is in 60
DEG C drying to constant weight.
The reduction rice field nitrous oxide emission that the modification muck charcoal being prepared using any of the above-described method is carried out
Method：Amount ratio of the muck charcoal according to 60 ± 10 tons of per hectares will be modified, modified muck life is disposably added into rice field
Object charcoal.
Application times are primary, without secondary addition.
The present invention carries out property representation to the modification low temperature pyrogenation pig manure charcoal of gained, measures element composition and virtue respectively
Fragrant structure, and be administered to and the emission reduction effect for verifying its nitrous oxide is carried out in rice soil.Compared with prior art, skill of the invention
Art advantage is：
1st, modified muck charcoal can significantly reduce the discharge of rice field nitrous oxide, emission reduction effect compared with initial charcoal
Fruit is with obvious effects up to 94%.
2nd, the agent that is modified in modifying process removal substance, main component be non-melt aromatic series organic matter, recyclable profit
With.For example, the Water Soluble Organic Carbon and mineral element of distillation flooding are by working process, it is fertile as novel organic or mineral
Material.The easy of acetone extraction decomposes organic carbon and aldehydes matter, by working process, as bio-fuel or chemical materials.
3rd, modified required extraction solvent is distilled water or acetone, and distilled water obtains simply, at low cost；Acetone has strong
Volatility, recyclable multiple utilization.The invention requires the purity and dosage of these digestion agents less, only need to fully extract biology
Non-melt aromatic series organic matter in charcoal, popularizing application prospect are big.
4th, the method for reducing rice field nitrous oxide emission using modified low temperature pyrogenation pig manure charcoal, is changed by preparing one kind
Property pig manure charcoal, significantly reduces the discharge of rice field nitrous oxide.
In conclusion present invention offer is a kind of to remove initial charcoal (pig manure using distilled water or organic solvent-acetone
Charcoal) in N2O increases the driving substance of row, inhibits soil denitrification effect, the final N for reducing paddy ecosystem2The discharge of O
Technical solution.
Specific embodiment
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This.
The preparation method of embodiment 1, modified muck charcoal, follows the steps below successively：
A, charcoal is prepared：Pig manure raw material is collected, moisture is dried in 100~110 DEG C less than 5%, it is closed to be put into anaerobic
In container (such as muffle furnace), 300~320 DEG C of isothermal pyrolysis are warming up to 2 hours with 20~30 DEG C/rate per minute, cooling
After after to room temperature, grain size is crushed to as≤3mm, that is, grain size is generally 0.15~3mm；Initial charcoal is obtained, is named as B300.
B, B300 that step A is prepared to gained is placed in container, adds in distilled water, and charcoal water ratio is 1kg:5L, sealing.Fully
Concussion 24 hours, concussion frequency are 200rpm；Carbon aqueous mixtures are filtered by vacuum later, leaching liquor is collected and (includes water-soluble
Property organic matter), be named as WC300, charcoal particle recycled using filter paper (film), wherein filter paper (film) only needs to be sufficiently separated extraction
Liquid and charcoal particle；By charcoal particle, drying to constant weight under the conditions of 60 DEG C (that is, removing moisture removal completely), obtains modification
Muck charcoal, is named as B300-WC300.
The characterization of modified muck charcoal B300-WC300 and muck charcoal B300 fundamental propertys are as shown in table 1：
Table 1, fundamental property
The preparation method of embodiment 2, modified muck charcoal, follows the steps below successively：
Step A is the same as embodiment 1；
B, by step A) prepare gained B300 be placed in container, add in acetone, charcoal ketone ratio be 1kg:10L, sealing.Fully
Concussion 24 hours, concussion frequency are 200rpm；Charcoal alcohol/ketone mixtures are filtered by vacuum later, collecting leaching liquor, (acetone can soak
Carry state organic matter), AC300 is named as, charcoal particle is recycled using filter paper (film), charcoal particle is dried under the conditions of 60 DEG C
It does to constant weight (that is, removing moisture removal completely), obtains modified muck charcoal, be named as B300-AC300.
The fundamental property characterization of modified muck charcoal B300-AC300 is as shown in table 1.
As shown in Table 1, the pH of charcoal before modification after, do not change substantially, 7.0 or so.Initial charcoal
Total carbon content is 39.3%, and after distilled water and modified by acetone, total carbon content reduces 9.3% and 10.7% respectively.Just
Eozoon charcoal total hydrogen content is 4.35%, and 1.55% and 1.11% are reduced respectively after distilled water and modified by acetone.It steams
The modified charcoal of distilled water, content of ashes decline 6.2%, and after modified by acetone, the content of ashes of charcoal rises
6.2%.The aromaticity of initial charcoal is 55.7%, after distilled water and modified by acetone, reduces by 16.0% He respectively
22.2%.The content of inorganic nitrogen in of charcoal there is no variation before and after distilled water or modified by acetone, in 200mg kg-1
Left and right.
Pyrolysis temperature in step A in embodiment 1 is modified to 700 ± 20 DEG C by embodiment 3 by 300~320 DEG C；Remaining
It is equal to embodiment 1.
In this case, the initial charcoal that is prepared by step 1 is named as B700, is changed by what step B was prepared
Property muck charcoal, is named as B700-WC700.
B700 is placed in container by comparative example 1, adds in WC300, and charcoal liquor ratio is 1kg:5L, sealing.Fully shaking 24 is small
When, concussion frequency is 100rpm；Carbon aqueous mixtures are filtered by vacuum later, charcoal particle is recycled using filter paper (film),
By charcoal particle, drying to constant weight under the conditions of 60 DEG C (that is, removing moisture removal completely), obtains modified muck charcoal, is named as
B700+WC300。
B700 is placed in container by comparative example 2, adds in AC300, and charcoal liquor ratio is 1kg:5L, sealing.Fully shaking 24 is small
When, concussion frequency is 100rpm；Carbon aqueous mixtures are filtered by vacuum later, charcoal particle is recycled using filter paper (film),
By charcoal particle, drying to constant weight under the conditions of 60 DEG C (that is, removing moisture removal completely), obtains modified muck charcoal, is named as
B700+AC300。
Experiment 1,
The modification muck charcoal (B300-WC300) of 1 above-mentioned preparation of embodiment is separately added into two parts of identical rice soil
In, and two parts of rice soil are set into two water content gradients, it is the 60% and 130% of field capacity, that is, be respectively aerobic shape
State (non-waterflooding) and anaerobic state (waterflooding).Backward every part of rice soil in add nitrate fertilizer, additive amount is 120mg N kg-1
Dry ground is equivalent to field amount of application 180kg N ha-1, the dosage of above-mentioned modification biological charcoal is 60 tons of per hectares (that is, modification biological
3%) additive amount of charcoal is.Cultivation temperature is 25 DEG C, and when culture is limited to 34 days, during which dynamic monitoring Soil oxidation Asia nitrogen (N2O)
Rate of discharge and denitrification related gene nirK and nosZ gene abundance dynamic rule.It is additionally provided in this experiment
Blank control group (CK), that is, set and only add nitrate fertilizer, and additive amount is 120mg N kg-1Two parts of rice soil of dry ground, two parts
Rice soil is respectively oxygen condition (non-waterflooding) and anaerobic state (waterflooding).
Note：NirK is to generate N in denitrification process2The gene of O；NosZ is by N in denitrification process2O is converted into N2Base
Cause.
Assay method is shown in Di, H.J.；Cameron,K.C.；Podolyan,A.；Robinson,A.Effect of soil
moisture status and a nitrification inhibitor,dicyandiamide,on ammonia
oxidizer and denitrifier growth and nitrous oxide emissions in a grassland
soil.Soil Biol.Biochem。
7 kinds of charcoals obtained by above-mentioned preparation, i.e. B300, B300-WC300, B300-AC300, B700, B700-WC700,
B700+WC300 and B700+AC300 measures its dynamic monitoring respectively by the above-mentioned method tested to B300-WC300
Soil N2The rate of discharge of O and the dynamic rule of denitrification related gene nirK and nosZ gene abundance.
Table 2, each charcoal N2(nirK and nosZ gene abundances is copy for O total emission volumns and its nirK and nosZ gene abundances
Shellfish number g-1Dry ground)
It is compareed by table 2 it is found that under 60% field capacity (60%WHC) and 130% field capacity (130%WHC),
Initial charcoal (B300) significantly increases N in soil2The total emission volumn of O, discharge capacity are respectively 2.57 and 38.2kg N ha-1。
Compared with initial charcoal, by the modified B300-WC300 of distilled water, N2The total emission volumn of O for 0.16 (60%WHC) and
24.5kg N ha-1(130%WHC) declines 93.7% and 35.9% respectively.Compared with initial charcoal, after modified by acetone
B300-AC300, N2The total emission volumn of O is 0.84 (60%WHC) and 29.8kg N ha-1(130%WHC), declines respectively
67.3% and 22.0%.In conclusion two kinds of modification biological charcoals significantly reduce N in soil2The total emission volumn of O.The opposing party
Face, although emission reduction effect of the charcoal under aerobic environment is slightly larger than anaerobic environment, under anaerobic environment, what charcoal drove
N2O total emission volumns are 10 times of aerobic environment or more, for example, under 130%WHC, compared with B300, B300-WC300 can be reduced
13.7kg N ha-1N2O discharge capacitys illustrate N of the modification biological charcoal to waterlogged soil2O emission reduction contributions are very huge.
Under two kinds of water content, the N of B700 and B700-WC7002O discharge capacitys are identical, illustrate that the present invention is more suitably applied to low temperature pyrogenation
The modification of pig manure charcoal.
It is compareed by table 2 it is found that modified pig manure charcoal produces denitrification function gene nirK in rice soil and nosZ abundance
It is raw to influence：
Microbes containing nirK genes are by NO3 -N is eventually converted by reaction2O gases emit.60%
Under WHC and 130%WHC water content, initial charcoal (B300) has been significantly increased denitrification gene nirK in soil
Abundance, and then increase N2The discharge of O.Compared with initial charcoal, the addition of modification biological charcoal significantly reduces denitrification
The abundance of effect gene nirK.
Microbes containing nosZ genes are by N2O is converted into N2Gas releases, so as to reduce N2The greenhouse that O is brought
Effect.NosZ gene abundances are higher, the N of consumption2O gases are more, N2The discharge capacity of O is fewer.Under 60%WHC, modified life
Object charcoal does not influence the Plantago fengdouensis of nosZ genes, i.e., under aerobic condition, modification biological charcoal, which mainly acts on, reduces nirK
Gene abundance inhibits N2The generation of O.Under 130%WHC, modification biological charcoal significantly reduces the abundance of nosZ genes, explanation
By N2O is converted into N2The ability of gas is weaker, further proves that modification biological charcoal reduces N2The discharge of O mainly acts on inhibition
N2The generation of O rather than acceleration N2O is converted into N2Process.
It is compareed by table 2 it is found that the charcoal component (WC300 and AC300) that digestion agent extracts is added in B700 by we
It is sufficiently mixed, forms B700+WC300 and B700+AC300, inquire into charcoal component (the i.e. N of removal2O discharge drivings substance) it is right
Rice soil N2The discharge of O has significant contribution.Two kinds of charcoals dramatically increase N in soil2The total emission volumn of O, illustrates the present invention
The method of modifying of use can effectively remove N in charcoal2The driving substance of O discharges.Under 130%WHC, the life of flooding is distilled
Object charcoal component can reduce N2The discharge of O is attributed to the N that nirK/nosZ is relatively low, that is, generates2O can be converted into more N2.It is comprehensive
N2The total emission volumn of O and related gene Plantago fengdouensis rule, the present invention are given birth to using distilled water and modified by acetone low temperature pyrogenation pig manure
Object charcoal significantly reduces N in rice soil2The discharge of O is one of effective ways for reducing rice field greenhouse gas emission.
Finally, it should also be noted that it is listed above be only the present invention several specific embodiments.Obviously, this hair
Bright to be not limited to above example, acceptable there are many deform.Those of ordinary skill in the art can be from present disclosure
All deformations for directly exporting or associating, are considered as protection scope of the present invention.
Claims (7)
1. it is modified the preparation method of muck charcoal, it is characterised in that include the following steps：
S1, initial charcoal is prepared using muck；
S2, the initial charcoal of step S1 preparation gained is placed in container, is sealed after adding in modifying agent, in 150~300rmp
Frequency under fully shaking 1~7 day；Then it is filtered by vacuum, drying to constant weight in 50~90 DEG C for the charcoal of recycling, obtains modified excrement
Fertile charcoal.
2. the preparation method of modified muck charcoal according to claim 1, it is characterised in that：
Modifying agent is distilled water in the step S2, and the solid-liquid ratio of charcoal and distilled water is 1kg:4-6L.
3. the preparation method of modified muck charcoal according to claim 1, it is characterised in that：
Modifying agent is acetone in the step S2, and the solid-liquid ratio of charcoal and acetone is 1g:9-11ml.
4. according to the preparation method of any modification muck charcoal of claims 1 to 3, it is characterised in that：
The method that the step S1 prepares initial charcoal is：
Muck is dried to moisture≤5% in 100~110 DEG C, in 300~700 DEG C of isothermal pyrolysis 1 in anaerobic closed container
~3 hours, grain size≤3mm is then crushed to, obtains initial charcoal.
5. the preparation method of modified muck charcoal according to claim 4, it is characterised in that：
The step S1 carries out isothermal pyrolysis after being warming up to 300~700 DEG C with 20~30 DEG C/min of heating rate.
6. according to the preparation method of any modification muck charcoal of claims 1 to 3, it is characterised in that：
It is 1~3 day that the time is shaken in the step S2, and concussion frequency is 200rmp；The charcoal of recycling is dried to perseverance in 60 DEG C
Weight.
7. it is aoxidized using the reduction rice field that the modification muck charcoal that such as claim 1~6 either method is prepared carries out sub-
Nitrogen discharged method, it is characterised in that：
Amount ratio of the muck charcoal according to 60 ± 10 tons of per hectares will be modified, modified muck biology is disposably added into rice field
Charcoal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014004.3A CN108147922A (en) | 2018-01-08 | 2018-01-08 | Reduce the method for rice field nitrous oxide emission and modification muck charcoal used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014004.3A CN108147922A (en) | 2018-01-08 | 2018-01-08 | Reduce the method for rice field nitrous oxide emission and modification muck charcoal used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108147922A true CN108147922A (en) | 2018-06-12 |
Family
ID=62461143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014004.3A Pending CN108147922A (en) | 2018-01-08 | 2018-01-08 | Reduce the method for rice field nitrous oxide emission and modification muck charcoal used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108147922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284853A (en) * | 2020-10-27 | 2021-01-29 | 江西农业大学 | Forest N relieving function2Method for O emission |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515914A (en) * | 2011-11-28 | 2012-06-27 | 北京师范大学 | Preparation method and use method of biomass carbon fertilizer |
| CN104829293A (en) * | 2015-03-27 | 2015-08-12 | 中国科学院地球化学研究所 | A method of reducing gaseous state loss of nitrogen in limestone soil by utilization of charcoal |
| US20160244379A1 (en) * | 2009-06-08 | 2016-08-25 | Full Circle Biochar, Inc. | Biochar |
-
2018
- 2018-01-08 CN CN201810014004.3A patent/CN108147922A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160244379A1 (en) * | 2009-06-08 | 2016-08-25 | Full Circle Biochar, Inc. | Biochar |
| CN102515914A (en) * | 2011-11-28 | 2012-06-27 | 北京师范大学 | Preparation method and use method of biomass carbon fertilizer |
| CN104829293A (en) * | 2015-03-27 | 2015-08-12 | 中国科学院地球化学研究所 | A method of reducing gaseous state loss of nitrogen in limestone soil by utilization of charcoal |
Non-Patent Citations (2)
| Title |
|---|
| 王耀锋: "竹质生物炭中溶解性有机碳对温室气体排放和土壤养分的影响", 《南京农业大学硕士学位论文》 * |
| 章骁劼: "生物炭、水分和氮源对农田土壤N2O排放和相关微生物的影响", 《浙江大学硕士学位论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284853A (en) * | 2020-10-27 | 2021-01-29 | 江西农业大学 | Forest N relieving function2Method for O emission |
| CN112284853B (en) * | 2020-10-27 | 2021-09-14 | 江西农业大学 | Forest N relieving function2Method for O emission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102627514B (en) | Soil-acidification-resistant organic fertilizer additive and preparation method thereof | |
| CN104788265B (en) | Salt-soda soil biological modification fertilizer and its preparation based on high sulfur coal gangue | |
| CN101781568B (en) | Soil conditioner, preparation method and application thereof | |
| Hou et al. | Win-win: Application of sawdust-derived hydrochar in low fertility soil improves rice yield and reduces greenhouse gas emissions from agricultural ecosystems | |
| CN108129200A (en) | Active micro-nano composite soil conditioner of agricultural charcoal and preparation method thereof | |
| CN102060632B (en) | Method for preparing multielement organic fertilizer by spontaneous fermentation of active humic acid | |
| CN103626600B (en) | A kind of organic fertilizer produced from sludge generated and preparation method thereof | |
| CN104261981A (en) | Preparation method of seaweed organic fertilizer and organic fertilizer prepared by using method | |
| CN104496569B (en) | A kind of biodegradable sludge composting fermentation conditioner and its application | |
| Wang et al. | Sustainable composting and its environmental implications | |
| CN107162647A (en) | A kind of riverway sludge processing method | |
| CN106348976A (en) | Functional fertilizer for regulating micro-ecological environment of soil | |
| CN105367207A (en) | Nitrogen fertilizer synergist and application thereof | |
| CN107176893A (en) | It is a kind of for composite fertilizer of three-coloured amaranth and preparation method thereof | |
| Jin et al. | Response of rice and bacterial community to phosphorus-containing materials in soil-plant ecosystem of rare earth mining area | |
| CN105598158A (en) | Phosphorus-based biochar material, and preparation and application thereof | |
| KR101588817B1 (en) | Manufacturing method of organic fertilizers using food industrial wastewater sludge | |
| CN107673902A (en) | It is a kind of to match somebody with somebody fertile auxiliary material and its production method with expelling parasite and slow releasing function | |
| CN107935769A (en) | A kind of new soil recuperation agent and preparation method thereof | |
| Dai et al. | Mechanism associated with the positive effect of nanocellulose on nitrogen retention in a manure composting system | |
| CN101274861B (en) | Heavy metal-passivated organic fertilizer and composting method | |
| CN108947728A (en) | A kind of preparation method of municipal sludge rare earth organic fertilizer | |
| CN108147922A (en) | Reduce the method for rice field nitrous oxide emission and modification muck charcoal used | |
| CN102765996B (en) | Method of recycling ammonia nitrogen in biogas slurry | |
| CN107353904A (en) | A kind of preparation and application of the soil heavy metal passivant of low order life environmental risk |
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 |