CN106431756A - Preparation method of slow-release fertilizer for improving soil - Google Patents
Preparation method of slow-release fertilizer for improving soil Download PDFInfo
- Publication number
- CN106431756A CN106431756A CN201610838142.4A CN201610838142A CN106431756A CN 106431756 A CN106431756 A CN 106431756A CN 201610838142 A CN201610838142 A CN 201610838142A CN 106431756 A CN106431756 A CN 106431756A
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- Prior art keywords
- montmorillonite
- preparation
- release fertilizer
- slow release
- mechanical agitation
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C5/00—Fertilisers containing other nitrates
- C05C5/02—Fertilisers containing other nitrates containing sodium or potassium nitrate
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a preparation method of a slow-release fertilizer for improving soil. The preparation method particularly comprises the following steps that montmorillonite is taken to be washed, dried, ground and then dissolved into a HCl solution, mechanical stirring is conducted for a certain time, vacuum filtration is conducted, washing, drying and screening are conducted, and acidized montmorillonite powder is obtained; the acidized montmorillonite powder is added into a chitosan solution, mechanical stirring is conducted for a certain time after ultrasonic oscillation and dispersion are conducted, centrifuging is conducted, precipitates are taken to be subjected to vacuum drying, ground and screened, and then a chitosan-montmorillonite compound is obtained; sodium nitrate and potassium chloride are mixed and then added into a sodium alginate solution to form a fertilizer kernel, the fertilizer kernel and the obtained compound are added into a disc granulator to be granulated, and then fertilizer granules are obtained. According to the preparation method, the adsorption capacity of the montmorillonite is enhanced by conducting acidizing treatment on the montmorillonite, the acidized montmorillonite is added into the chitosan solution to prepare the chitosan-montmorillonite compound, and then the slow-release fertilizer is obtained; the obtained slow-release fertilizer has the effects of decreasing the fertilizing frequency and avoiding nutrient loss and has an improving effect on the soil contaminated by heavy metals.
Description
Technical field
The invention belongs to technical field of fertilizers, more particularly to a kind of preparation method of the slow release fertilizer of improved soil.
Background technology
Montmorillonite also known as montmorillonite, montmorillonite, a kind of natural minerals of silicate, are the essential mineral of bentonite ore
Component.Monoclinic system, multidigit crystallite, aggregation is in the shape such as earthy, spherolite.White micro-strip light gray, in pale yellow, shallow when impure
Green, light blue, earthy gloss or tarnish, there is sliding sense.The inflatable several times of its volume after adding water, and become pastel.It is heated de-
Volume contraction after water.There is very strong absorbability and cation exchange property, mainly originate in the weathering crust of volcanic tuff.
Montmorillonite is less than 25nm, can bleach through dispersion of delaminating, purification remodeling, super-fine classified, special organic composite, average wafer thickness
Agent, adsorbent filler, are referred to as " universal material ".
Slow release fertilizer is also known as slow-release fertilizer or release and release control fertilizer, and in its fertilizer, the compound containing nutrient discharges speed in soil
The slow or nutrient releasing speed of degree can obtain a certain degree of control for the utilization of crop constant absorption.Long-time field is tried
Test and show with result of study, under normal conditions, after people's soil applied by nitrogenous fertilizer, the utilization absorbed by crops of only 30-50% energy, and
Remainder then lost in vain.Loss of nitrogen fertilizer being caused, is due to the volatilization of ammonia. leaching loss, nitrification and denitrification act on institute
Cause.Developing and slow-release nitrogen fertilizer is applied, exactly in order to reduce the dissolution velocity of nitrogenous fertilizer, nitrogenous fertilizer is made successively for making in slow course of dissolution
Thing provide nitrogen, injure because local concentration is too high when preventing from applying in a large number crop seed, seedling or leaf of burning etc. bad after
Really, to reach the purpose for improving utilization rate of nitrogen fertilizer.
Content of the invention
It is an object of the invention to provide a kind of preparation method of the slow release fertilizer of improved soil, by prepare shitosan/
Montmorillonite composite is obtained slow release fertilizer and has minimizing fertilizer application frequency, it is to avoid effect of nutrient loss as fertilizer carrier, while
Heavy metal contaminated soil has the effect of improvement.
The present invention is achieved by the following technical solutions：
A kind of preparation method of the slow release fertilizer of improved soil, comprises the following specific steps that：
S1, take montmorillonite washing and drying after be milled to particle diameter for 1.28-1.75mm, obtain montmorillonite particle；
S2, the montmorillonite particle for preparing in S1 is dissolved in 1mol/L HCl solution, after mechanical agitation certain time
To acid montmorillonite suspension；
S3, will wash after the acid montmorillonite suspension vacuum filtration for obtaining in S2 and use AgNO3Solution detection chloride ion is residual
Stay, milled 300 mesh sieve of post-drying, obtain acid montmorillonite powder；
S4, by the montmorillonite powder for obtaining in S3 in add chitosan solution in, solid-to-liquid ratio be 1:500, ultrasonic vibration divides
After dissipating, mechanical agitation certain time, centrifuging and taking precipitation is vacuum dried and ground 200 mesh sieve obtains shitosan/montmorillonite Composite
Thing；
S5, will sodium nitrate and potassium chloride mixing after be added in 3% sodium alginate soln, solid-to-liquid ratio be 1:7.5, with drop
The mixed solution is added dropwise over forming kernel in 5% calcium chloride solution by pipe, by the kernel and S4 after standing 10-20min
Shitosan/the montmorillonite composite of preparation add to granulating disc in pelletize, be put into after pelletize in 60 DEG C of baking ovens dry, cooling
Sieve and retain fertiliser granulates of the particle diameter for 1.2-1.8mm to room temperature.
Further, in the S1, montmorillonite is washed with deionized 2-3 time, and drying temperature is that 90 DEG C, drying time is
2-4h.
Further, it is 6-8h 80 DEG C, mechanical agitation time that in the S2, mechanical agitation temperature is, mechanical agitation speed is
200-250r/min.
Further, in the S3, drying temperature is 105 DEG C, and drying time is 4-6h.
Further, chitosan solution concentration described in S4 is 2g/L, and the solvent of the chitosan solution is that 2% acetic acid is molten
Liquid, the chitosan solution pH is 4.8-5.5.
Further, in the S4, ultrasonic power is 180-220w, and ultrasonic time is 20-30min.
Further, in the S4, mechanical agitation temperature is 60 DEG C, and mechanical agitation speed is 250r/min, during mechanical agitation
Between be 8h.
Further, in the S4, centrifugation rate is 4500-6000r/min, and centrifugation time is 20min.
Further, in the S5, the mass ratio of sodium nitrate and potassium chloride is 5:1.
The invention has the advantages that：
The present invention strengthens its absorbability by carrying out acidification to montmorillonite, and acid montmorillonite is added gathers to shell
Shitosan/montmorillonite composite is prepared in sugar juice, by this complex and sodium nitrate and a kind of slow release of potassium chloride mixture manufacturing
Fertilizer, obtains slow release fertilizer and has minimizing fertilizer application frequency, it is to avoid effect of nutrient loss, while heavy metal contaminated soil has
The effect of improvement.
Specific embodiment
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The all other embodiment for being obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1
S1, take after montmorillonite is washed with deionized 2 times drying 2h is put in 90 DEG C of baking ovens, the montmorillonite of drying is ground
It is 1.28mm to particle diameter, obtains montmorillonite particle；
S2, the montmorillonite particle for preparing in S1 is dissolved in 1mol/L HCl solution, machinery under 80 DEG C of water bath condition
Stirring 6h, mixing speed is 200r/min, to obtain acid montmorillonite suspension；
S3, the acid montmorillonite suspension for obtaining in S2 is cooled to room temperature, with distilled water wash 3 times after vacuum filtration, uses
AgNO3Solution detects Chloride residue；
Acid montmorillonite after this is washed is put into drying 4h, milled 300 mesh sieve in 105 DEG C of baking ovens, obtains acidifying and covers
De- soil powder；
S4, weigh shitosan and be dissolved in 2% acetum, chitosan concentration is to adjust 2g/L, with 1mol/L NaOH solution
Section pH to 4.8, obtains chitosan solution；
The montmorillonite powder for obtaining in S3 is added in the chitosan solution, and solid-to-liquid ratio is 1:500,180w ultrasonic vibration
20min, with 250r/min mechanical agitation 8h under 60 DEG C of water bath condition, is centrifuged 20min with 4500r/min afterwards, takes precipitation vacuum
After drying, ground 200 mesh sieve obtains shitosan/montmorillonite composite；
S5, will sodium nitrate and potassium chloride mixing after be added in 3% sodium alginate soln, solid-to-liquid ratio be 1:7.5, wherein
The mass ratio of sodium nitrate and potassium chloride is 5:1, with dropper, the mixed solution is added dropwise in 5% calcium chloride solution in formation
Core, pelletize in after standing 10min adding the shitosan/montmorillonite composite for preparing in the kernel and S4 to granulating disc,
It is put into after pelletize in 60 DEG C of baking ovens and dries, after being cooled to room temperature, sieves and retain fertiliser granulates of the particle diameter for 1.2mm.
Embodiment 2
S1, take after montmorillonite is washed with deionized 3 times drying 4h is put in 90 DEG C of baking ovens, the montmorillonite of drying is ground
It is 1.75mm to particle diameter, obtains montmorillonite particle；
S2, the montmorillonite particle for preparing in S1 is dissolved in 1mol/L HCl solution, machinery under 80 DEG C of water bath condition
Stirring 8h, mixing speed is 250r/min, to obtain acid montmorillonite suspension；
S3, the acid montmorillonite suspension for obtaining in S2 is cooled to room temperature, with distilled water wash 5 times after vacuum filtration, uses
AgNO3Solution detects Chloride residue；
Acid montmorillonite after this is washed is put into drying 6h, milled 300 mesh sieve in 105 DEG C of baking ovens, obtains acidifying and covers
De- soil powder；
S4, weigh shitosan and be dissolved in 2% acetum, chitosan concentration is to adjust 2g/L, with 1mol/L NaOH solution
Section pH to 5.5, obtains chitosan solution；
The montmorillonite powder for obtaining in S3 is added in the chitosan solution, and solid-to-liquid ratio is 1:500,220w ultrasonic vibration
30min, with 250r/min mechanical agitation 8h under 60 DEG C of water bath condition, is centrifuged 20min with 6000r/min afterwards, takes precipitation vacuum
After drying, ground 200 mesh sieve obtains shitosan/montmorillonite composite；
S5, will sodium nitrate and potassium chloride mixing after be added in 3% sodium alginate soln, solid-to-liquid ratio be 1:7.5, wherein
The mass ratio of sodium nitrate and potassium chloride is 5:1, with dropper, the mixed solution is added dropwise in 5% calcium chloride solution in formation
Core, pelletize in after standing 20min adding the shitosan/montmorillonite composite for preparing in the kernel and S4 to granulating disc,
It is put into after pelletize in 60 DEG C of baking ovens and dries, after being cooled to room temperature, sieves and retain fertiliser granulates of the particle diameter for 1.8mm.
Embodiment 3
S1, take after montmorillonite is washed with deionized 2 times drying 3h is put in 90 DEG C of baking ovens, the montmorillonite of drying is ground
It is 1.5mm to particle diameter, obtains montmorillonite particle；
S2, the montmorillonite particle for preparing in S1 is dissolved in 1mol/L HCl solution, machinery under 80 DEG C of water bath condition
Stirring 7h, mixing speed is 220r/min, to obtain acid montmorillonite suspension；
S3, the acid montmorillonite suspension for obtaining in S2 is cooled to room temperature, with distilled water wash 4 times after vacuum filtration, uses
AgNO3Solution detects Chloride residue；
Acid montmorillonite after this is washed is put into drying 5h, milled 300 mesh sieve in 105 DEG C of baking ovens, obtains acidifying and covers
De- soil powder；
S4, weigh shitosan and be dissolved in 2% acetum, chitosan concentration is to adjust 2g/L, with 1mol/L NaOH solution
Section pH to 5.0, obtains chitosan solution；
The montmorillonite powder for obtaining in S3 is added in the chitosan solution, and solid-to-liquid ratio is 1:500,200w ultrasonic vibration
25min, with 250r/min mechanical agitation 8h under 60 DEG C of water bath condition, is centrifuged 20min with 5500r/min afterwards, takes precipitation vacuum
After drying, ground 200 mesh sieve obtains shitosan/montmorillonite composite；
S5, will sodium nitrate and potassium chloride mixing after be added in 3% sodium alginate soln, solid-to-liquid ratio be 1:7.5, wherein
The mass ratio of sodium nitrate and potassium chloride is 5:1, with dropper, the mixed solution is added dropwise in 5% calcium chloride solution in formation
Core, pelletize in after standing 15min adding the shitosan/montmorillonite composite for preparing in the kernel and S4 to granulating disc,
It is put into after pelletize in 60 DEG C of baking ovens and dries, after being cooled to room temperature, sieves and retain fertiliser granulates of the particle diameter for 1.6mm.
Slow release fertilizer is also known as slow-release fertilizer or release and release control fertilizer, and in its fertilizer, the compound containing nutrient discharges speed in soil
The slow or nutrient releasing speed of degree can obtain a certain degree of control for the utilization of crop constant absorption.The present invention is by right
Montmorillonite carries out acidification and strengthens its absorbability, and prepare during acid montmorillonite is added to chitosan solution shitosan/
Montmorillonite composite, this complex and sodium nitrate and a kind of slow release fertilizer of potassium chloride mixture manufacturing obtain slow release fertilizer tool
It is reduced fertilizer application frequency, it is to avoid effect of nutrient loss, while heavy metal contaminated soil has the effect of improvement.
Above content is only citing made for the present invention and illustrates, affiliated those skilled in the art are to being retouched
The specific embodiment that states make various modification supplement or using similar mode replacement, without departing from invention or surpass
More scope defined in the claims, all should belong to protection scope of the present invention.
Claims (9)
1. a kind of preparation method of the slow release fertilizer of improved soil, it is characterised in that comprise the following specific steps that：
S1, take montmorillonite washing and drying after be milled to particle diameter for 1.28-1.75mm, obtain montmorillonite particle；
S2, the montmorillonite particle for preparing in S1 is dissolved in 1mol/L HCl solution, mechanical agitation obtains acid after certain time
Change montmorillonite suspension；
S3, will wash after the acid montmorillonite suspension vacuum filtration for obtaining in S2 and use AgNO3Solution detects Chloride residue, it
Milled 300 mesh sieve of post-drying, obtains acid montmorillonite powder；
S4, by the montmorillonite powder for obtaining in S3 in add chitosan solution in, solid-to-liquid ratio be 1:500, after ultrasonic vibration dispersion,
Mechanical agitation certain time, centrifuging and taking precipitation is vacuum dried and ground 200 mesh sieve obtains shitosan/montmorillonite composite；
S5, will sodium nitrate and potassium chloride mixing after be added in 3% sodium alginate soln, solid-to-liquid ratio be 1:7.5, will with dropper
The mixed solution is added dropwise over forming kernel in 5% calcium chloride solution, will be prepared after standing 10-20min in the kernel and S4
Shitosan/montmorillonite composite add to granulating disc in pelletize, be put into after pelletize in 60 DEG C of baking ovens and dry, be cooled to often
Sieve and retain fertiliser granulates of the particle diameter for 1.2-1.8mm after temperature.
2. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S1
Montmorillonite is washed with deionized 2-3 time, and it is 2-4h that drying temperature is 90 DEG C, drying time.
3. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S2
Mechanical agitation temperature is 80 DEG C, and it is 200-250r/min that the mechanical agitation time is 6-8h, mechanical agitation speed.
4. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S3
Drying temperature is 105 DEG C, and drying time is 4-6h.
5. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：Described in S4
Chitosan solution concentration is 2g/L, and the solvent of the chitosan solution is 2% acetum, and the chitosan solution pH is 4.8-
5.5.
6. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S4
Ultrasonic power is 180-220w, and ultrasonic time is 20-30min.
7. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S4
Mechanical agitation temperature is 60 DEG C, and it is 8h 250r/min, the mechanical agitation time that mechanical agitation speed is.
8. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S4
Centrifugation rate is 4500-6000r/min, and centrifugation time is 20min.
9. the preparation method of the slow release fertilizer of a kind of improved soil according to claim 1, it is characterised in that：In the S5
The mass ratio of sodium nitrate and potassium chloride is 5:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610838142.4A CN106431756A (en) | 2016-09-21 | 2016-09-21 | Preparation method of slow-release fertilizer for improving soil |
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| CN201610838142.4A CN106431756A (en) | 2016-09-21 | 2016-09-21 | Preparation method of slow-release fertilizer for improving soil |
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| CN201610838142.4A Pending CN106431756A (en) | 2016-09-21 | 2016-09-21 | Preparation method of slow-release fertilizer for improving soil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966782A (en) * | 2017-03-03 | 2017-07-21 | 安徽金培因科技有限公司 | A kind of preparation method of the slow release fertilizer based on Rice Cropping |
| CN108467316A (en) * | 2018-06-29 | 2018-08-31 | 望江县东方米业有限责任公司 | A kind of Rice Cropping Water-retaining slow-release fertilizer |
| CN109180305A (en) * | 2018-08-31 | 2019-01-11 | 广西南宁大地肥田农业科技有限公司 | Prevention and treatment crop root rot nutrient for plants and preparation method thereof is made using Chinese herbal medicine |
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| CN101456766A (en) * | 2007-12-11 | 2009-06-17 | 傅博 | Composite coated slow-released fertilizer |
| CN101524635A (en) * | 2009-03-28 | 2009-09-09 | 大连理工大学 | Method for preparing chitosan/organo montmorillonite nanometer composite material |
| CN101928179A (en) * | 2009-06-19 | 2010-12-29 | 深圳市意可曼生物科技有限公司 | Slow release fertilizer having soil remediation function and soil contamination remediation method |
| CN105110997A (en) * | 2015-10-07 | 2015-12-02 | 吴朱冠宇 | Controlled release fertilizer and preparation method thereof |
-
2016
- 2016-09-21 CN CN201610838142.4A patent/CN106431756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456766A (en) * | 2007-12-11 | 2009-06-17 | 傅博 | Composite coated slow-released fertilizer |
| CN101524635A (en) * | 2009-03-28 | 2009-09-09 | 大连理工大学 | Method for preparing chitosan/organo montmorillonite nanometer composite material |
| CN101928179A (en) * | 2009-06-19 | 2010-12-29 | 深圳市意可曼生物科技有限公司 | Slow release fertilizer having soil remediation function and soil contamination remediation method |
| CN105110997A (en) * | 2015-10-07 | 2015-12-02 | 吴朱冠宇 | Controlled release fertilizer and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966782A (en) * | 2017-03-03 | 2017-07-21 | 安徽金培因科技有限公司 | A kind of preparation method of the slow release fertilizer based on Rice Cropping |
| CN108467316A (en) * | 2018-06-29 | 2018-08-31 | 望江县东方米业有限责任公司 | A kind of Rice Cropping Water-retaining slow-release fertilizer |
| CN109180305A (en) * | 2018-08-31 | 2019-01-11 | 广西南宁大地肥田农业科技有限公司 | Prevention and treatment crop root rot nutrient for plants and preparation method thereof is made using Chinese herbal medicine |
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