CN101759496B - Degradable high polymer film-coated controlled release fertilizer - Google Patents
Degradable high polymer film-coated controlled release fertilizer Download PDFInfo
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- CN101759496B CN101759496B CN200910230287A CN200910230287A CN101759496B CN 101759496 B CN101759496 B CN 101759496B CN 200910230287 A CN200910230287 A CN 200910230287A CN 200910230287 A CN200910230287 A CN 200910230287A CN 101759496 B CN101759496 B CN 101759496B
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Abstract
The invention discloses a degradable high polymer film-coated controlled release fertilizer. The degradable high polymer film-coated controlled release fertilizer has the particle size range of 2.0 to 5.0mm, the coating rate of 2 to 10 percent and the nutrient release period of 1 to 10 months. A film-coated material has good biodegradability, so a film shell can be degraded quickly after the fertilizer is applied, and the controlled release fertilizer is favorable for protecting the agricultural ecological environment. The nutrient release period of the product can be controlled between 1 and 12 months accurately. In addition, products with different release periods and different release characteristics can be blended in a certain proportion and made into specific film-coated controlled release fertilizers special for various crops by simulating the nutrient demands of the various crops, and nutrient release curves of the controlled release fertilizers are made to coincide with nutrient uptake curves of the crops to achieve the aim of controlling the release of the nutrient accurately.
Description
Technical field
The invention belongs to the Chemicals field, be specifically related to a kind of degradable high polymer film-coated controlled release fertilizer product.
Background technology
China's chemical fertilizer consumption amount accounts for 20～30% of world Fertilizer total quantity consumed, ranks first in the world, and developed country's chemical fertilizer this season utilization ratio average out to 50～60%, China's chemical fertilizer this season utilization ratio on average is merely 30～35%.The loss waste of macronutrient not only brings enormous economic loss to society, but also can cause serious environmental to pollute.At present, along with the continuous increase of fertilizer amount, devote exclusive attention to output and lay equal stress on both quality and quantity at agricultural-food, and the requirement of eco-friendly multiple target down, the modification problem of fertilizer just seems even more important.Exploitation slowly-releasing, release and release control fertilizer improve utilization rate of fertilizer, reduce environmental pollution, are simple measures, are particularly suitable for the national conditions of China.China's chemical fertilizer utilization ratio is lower than one of reason of developed country, is difficult to prove effective in China in the series that developed country the taked technology of applying fertilizers scientifically exactly.China peasant's level of education is low, and peasant household's land area is small and scattered, and planting system is complicated, and mechanization degree is low, and the farmingization service system is difficult to set up and put in place, and rational application of fertilizers is difficult to the service that the peasant provides convenience with other technical measures; In addition, in the developed area, be unwilling the time and efforts that in agronomy operation such as topdress, costs a lot of money of peasant.Therefore, be badly in need of a kind ofly collecting rational application of fertilizers, controlled-release technology is the materialization fertilizer product of one.The appearance of novel controlled release compound manure can not only improve utilization rate of fertilizer, guarantees grain security, reduces environmental pollution, has also satisfied peasant's actual demand.
Film-coated controlled release fertilizer is to be core with the granular chemical fertilizer; The top layer applies the inorganic substance or the organic polymer of one deck low water solubility or microsolubility; Change the stripping property of chemical fertilizer nutrient, prolongation or control fertilizer nutrient discharge, and make the supply of soil nutrient and the new-type fertilizer formulation that crop needs fertile requirement to coordinate.The kind of film-coated controlled release fertilizer; Divide from coated fertilizer; Can be divided into inorganics coated fertilizer and organic polymer coated fertilizer; The former majority is with mineral manure that contains certain nutrient or soil conditioner and so on material, and the latter comprises that organic synthesis thing of high molecular polymer, low water solubility or insoluble etc. is as coated fertilizer.The inorganics coated fertilizer is general to the slow controlled-release effect of nutrient, is difficult to reach fertilizer nutrient rate of release and crop to the corresponding to requirement of nutrient demand speed; High polymer film-coated controlled release fertilizer is widely used in aspects such as flowers, landscape plant, golf course because of its good nutrient controlled release properties, and effect very significantly; But high polymer film-coated material generally is difficult to degraded or degradation time is longer, so the selection of mould material and manufacture craft is the key of the good degradable film-coated controlled release fertilizer of production performance.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can improve utilization rate of fertilizer, can protect the degradable high polymer film-coated controlled release fertilizer of agroecological environment again, can on facilities horticulture, farm crop, be applied.
Technical scheme of the present invention is following:
A kind of degradable high polymer film-coated controlled release fertilizer, its particle size range is 2.0～5.0mm, and the coating rate is 2～10%, and fertilizer releasing period is 1～10 month, and making method is:
(1) 85～95 parts of TR 301 of weighing and 5～15 parts of EVA (Injecatable EVA Copolymer) are heated to 110～130 ℃ of stirring and dissolving in the mixed solution of 1500～2000 parts of ETHYLE ACETATE and methylene dichloride, be configured to spray coating liquor.
(2) granulated fertilizer of weighing is utilized 85～110 ℃ warm air preheating in fluidized-bed; Utilize setting off by contrast of warm air, spray coating liquor sprays on suspension, the fluidizing granulated fertilizer surface, under the effect of warm air through shower nozzle; Solvent volatilizees rapidly; Coated fertilizer is wrapped in the granulated fertilizer surface and forms rete dry, smooth densification, through the continuous spraying of spray coating liquor, makes film-coated controlled release fertilizer up to accomplishing the coating process.
The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
Aforesaid degradable high polymer film-coated controlled release fertilizer, optimized technical scheme are that said TR 301 is a tree elastomer.
Aforesaid degradable high polymer film-coated controlled release fertilizer, optimized technical scheme are that ETHYLE ACETATE accounts for 40～60% of gross weight in the mixed solution of ETHYLE ACETATE and methylene dichloride.
Aforesaid degradable high polymer film-coated controlled release fertilizer, optimized technical scheme are that the coating rate is 4～8%.
Aforesaid degradable high polymer film-coated controlled release fertilizer, optimized technical scheme are that fertilizer releasing period is 2～9 months.
Aforesaid degradable high polymer film-coated controlled release fertilizer, said granulated fertilizer is selected from urea, bicarbonate of ammonia, an ammonium nitrate, ammonium sulfate, diammonium phosphate, primary ammonium phosphate, vitriolate of tartar, Repone K or nitrophosphate fertilizer.
In the making method of degradable high polymer film-coated controlled release fertilizer of the present invention, adopt the mixing solutions configuration spray coating liquor of YLENE and methylene dichloride, have good explosion-proof performance, assurance is provided for realizing safety in production; Used coated fertilizer biological degradability is good, and after fertilizer was used, under soil organisms, illumination, moisture and heat effect, putamina can be degraded rapidly, helps the protection of agroecological environment.Also have following excellent results in addition: the nutrient controlled release phase of product can be regulated according to membrane wrapping thickness and mould material prescription; Can accurately be controlled at and not wait in 1 month to 12 months; Also can the product with different release period, different release characteristics be mixed according to a certain percentage in addition; Simulate various crops to nutrient demand; Make various crop special coated controlled release fertilizers, controlled release fertile nutrient release profiles and crop are matched to the nutrient absorbing curve, reach the purpose of the accurate controlled release of nutrient.This product has carried out a large amount of pot experiments, field test and demonstration on crops such as paddy rice, corn, tobacco, peanut, wheat, cotton, strawberry, yam, multiple flowers, vegetables, fruit tree, lawn; Test-results shows; This product all has significant raising the output and synergism on above-mentioned crop, have popularizing application prospect very widely.
Description of drawings
Fig. 1 is the nutrient releasing curve diagram of 2 months controlled release phases 44-0-0 coating controlled-release fertilizer in 25 ℃ of water.
Fig. 2 is the nutrient releasing curve diagram of 3 months controlled release phases 20-8-10 coating controlled-release fertilizer in 25 ℃ of water.
Fig. 3 is the nutrient releasing curve diagram of 6 months controlled release phases 42-0-0 coating controlled-release fertilizer in 25 ℃ of water.
Fig. 4 is the nutrient releasing curve diagram of 9 months controlled release phases 20-8-10 coating controlled-release fertilizer in 25 ℃ of water.
Embodiment
Specify technical scheme of the present invention below in conjunction with embodiment, experimental example and accompanying drawing, but protection domain is not limited thereto.The raw materials used commercial goods that is all among each embodiment, used EVA (Injecatable EVA Copolymer) is available from Shahe, Laizhou City town great optical plastic factory; Used TR 301 uses tree elastomer, available from Wuhan Yuancheng Technology Development Co., Ltd..
The making of embodiment 12 months controlled release phases degradable coated release-controlled urea (44-0-0)
Weighing 38kg tree elastomer and 2kg EVA are heated to 110～130 ℃ of stirring and dissolving in 240kg ETHYLE ACETATE and 360kg methylene dichloride mixed solution, be configured to spray coating liquor; (2.0～4.75mm) utilize 85～110 ℃ warm air preheating in fluidized-bed with the 1000kg granular urea; Utilize setting off by contrast of warm air, coating liquid sprays on suspension, the fluidizing urea granules surface, under the effect of warm air through shower nozzle; Solvent volatilizees rapidly; Coated fertilizer is wrapped in the fertiliser granulates surface and forms rete dry, smooth densification, through the continuous spraying of coating liquid, makes the coating rate coated release-controlled urea of about 4% 2 months controlled release phases (44-0-0) up to accomplishing the coating process; The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
The making of the embodiment coated release-controlled composite fertilizer of 23 months controlled release phases degradable (20-8-10)
Weighing 45kg tree elastomer and 5kg EVA are heated to 110～130 ℃ of stirring and dissolving in 450kg ETHYLE ACETATE and 450kg methylene dichloride mixed solution, be configured to spray coating liquor; (2.0～4.75mm) utilize 85～110 ℃ warm air preheating in fluidized-bed with the 1000kg granular urea; Utilize setting off by contrast of warm air, coating liquid sprays on suspension, the fluidizing urea granules surface, under the effect of warm air through shower nozzle; Solvent volatilizees rapidly; Coated fertilizer is wrapped in the fertiliser granulates surface and forms rete dry, smooth densification, through the continuous spraying of coating liquid, makes the coated release-controlled composite fertilizer (20-8-10) of about 5% 3 months controlled release phases of coating rate up to completion coating process; The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
The making of embodiment 36 months controlled release phases degradable coated release-controlled urea (42-0-0)
Weighing 63kg tree elastomer and 7kg EVA are heated to 110～130 ℃ of stirring and dissolving in 630kg ETHYLE ACETATE and 630kg methylene dichloride mixed solution, be configured to spray coating liquor; (2.0～4.75mm) utilize 85～110 ℃ warm air preheating in fluidized-bed with the 1000kg granular urea; Utilize setting off by contrast of warm air, coating liquid sprays on suspension, the fluidizing urea granules surface, under the effect of warm air through shower nozzle; Solvent volatilizees rapidly; Coated fertilizer is wrapped in the fertiliser granulates surface and forms rete dry, smooth densification, through the continuous spraying of coating liquid, makes the coating rate coated release-controlled urea of about 7% 6 months controlled release phases (42-0-0) up to accomplishing the coating process; The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
The making of the embodiment coated release-controlled composite fertilizer of 49 months controlled release phases degradable (20-8-10)
Weighing 76.5kg tree elastomer and 13.5kg EVA are heated to 110～130 ℃ of stirring and dissolving in 1080kg ETHYLE ACETATE and 720kg methylene dichloride mixed solution, be configured to spray coating liquor; (2.0～4.75mm) utilize 85～110 ℃ warm air preheating in fluidized-bed with the 1000kg granular urea; Utilize setting off by contrast of warm air, coating liquid sprays on suspension, the fluidizing urea granules surface, under the effect of warm air through shower nozzle; Solvent volatilizees rapidly; Coated fertilizer is wrapped in the fertiliser granulates surface and forms rete dry, smooth densification, through the continuous spraying of coating liquid, makes the coated release-controlled composite fertilizer (20-8-10) of about 9% 9 months controlled release phases of coating rate up to completion coating process; The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
Experimental example 1:
The concrete effect of this product is described with biological test below:
(1) rice test scheme
Test is located at Hou Fangwu village, Hedong District Tang He town, Linyi; Confession try the water rice varieties be in new No. 1; Soil is rice soil; Controlled release fertilizer is treated to the dedicated release-controlled Bulk Blending Fertilizer of paddy rice (22-8-20, controlled release nitrogen accounts for 66%), is made by degradable high polymer film-coated controlled release urea (42-0-0) (embodiment 3), urea (46%), monoammonium phosphate (58%), Repone K (57%) blending; Common fertilizer treatment is urea (46%), monoammonium phosphate (58%), Repone K (57%); Special controlled release fertilizer for rice is once to apply at rice transplanting previous crops base manure, and common fertilizer is used by peasant's custom of applying fertilizer and divided base manure and topdress, and specific practice is; The urea base executes 1/3; Respectively impose 1/3 with long fringe productive phase tillering phase, and other fertilizer are turned over to drop back at rice terrace and executed, through raking the soil level fertilizer and mixing with soil.Special-purpose control-release fertilizer is established two Fertilization Level, and controlled release fertile 1 is to reduce by 15% consumption than common fertilizer, and controlled release fertile 2 is to reduce by 30% consumption than common fertilizer.
(2) test-results
The test-results (table 1) of the dedicated release-controlled Bulk Blending Fertilizer of paddy rice on Hedong District Tang He town, Linyi Hou Fangwu village paddy rice shows; Under the situation that reduces by 15% fertilizer amount; Controlled release Bulk Blending Fertilizer single fertilization has increased by 22.8% than 3 fertilisings of tradition rice yield; And under the situation of nutrient amount of application minimizing 30%, the controlled release Bulk Blending Fertilizer has increased by 13.5% than 3 fertilisings of tradition rice yields.
Table 1 different fertilization effect assessment
| Handle | Subtract than common fertilizer | Than common fertilizer stimulation ratio (%) | Effect assessment |
| Shaoshi consumption (%) | |||
| |
0 | 0 | Utilization rate of fertilizer is low, and suggestion increases fertilizer application frequency or uses new-type fertilizer. |
| Controlled release fertile 1 | 15 | 22.8 | Effect of increasing production is good, and input cost is higher, and is time saving and energy saving, can promote. |
| Controlled release fertile 2 | 30 | 13.5 | Effect of increasing production is obvious, and less investment is time saving and energy saving, is worthy to be popularized, and recommends. |
Experimental example 2:
Measuring method in the controlled release fertilizer nutrient release rate water: take by weighing the 10g fertilizer sample; Accurately, put into the pouch made from 100 order nylon gauzes and seal, pouch is put into the 250ml separating funnel to 0.01g; Adding distil water 250ml then; Sealing is placed in 25 ℃ the constant incubator, do 3 times parallel, do blank test simultaneously.At 1d, 3d, 7d, 14d, 28d, 42d, 60d, 90d, 120d ... Sampling and measuring reaches 80% up to nutrient cumulative release rate.
Fig. 1 is fertile (embodiment 1) the nutrient releasing curve diagram in 25 ℃ of water of 2 months controlled release phases 44-0-0 controlled release.Fig. 2 is fertile (embodiment 2) the nutrient releasing curve diagram in 25 ℃ of water of 3 months controlled release phases 20-8-10 controlled release.Fig. 3 is fertile (embodiment 3) the nutrient releasing curve diagram in 25 ℃ of water of 6 months controlled release phases 42-0-0 controlled release.Fig. 4 is fertile (embodiment 4) the nutrient releasing curve diagram in 25 ℃ of water of 9 months controlled release phases 20-8-10 controlled release.Can find out that by Fig. 1-4 degradable high polymer film-coated controlled release fertilizer of the present invention has good nutrient release characteristic, has well played the fertilizer nutrient controlled-release function.
Degradable high polymer film-coated controlled release fertilizer product of the present invention meets the national sustained-controll-release fertiliser GB/T 23348-2009 standard that played enforcement on 09 01st, 2009; Improve the fertilizer nutrient utilization ratio, improving aspects such as crop yield and Agriculture Ecological Environment Protection, obtaining outstanding technique effect.
Claims (5)
1. a degradable high polymer film-coated controlled release fertilizer is characterized in that, particle size range is 2.0～5.0mm, and the coating rate is 2～10%, and fertilizer releasing period is 1～10 month, and making method is:
(1) 85～95 parts of TR 301 of weighing and 5～15 parts of EVA (Injecatable EVA Copolymer); In the mixed solution of 1500～2000 parts of ETHYLE ACETATE and methylene dichloride, be heated to 110～130 ℃ of stirring and dissolving; Be configured to spray coating liquor, ETHYLE ACETATE accounts for 40～60% of gross weight in the mixed solution of ETHYLE ACETATE and methylene dichloride;
(2) granulated fertilizer of weighing is utilized 85～110 ℃ warm air preheating in fluidized-bed, utilize setting off by contrast of warm air, spray coating liquor sprays on suspension, the fluidizing granulated fertilizer surface through shower nozzle; Under the effect of warm air; Solvent volatilizees rapidly, and coated fertilizer is wrapped in the granulated fertilizer surface and forms rete dry, smooth densification, through the continuous spraying of spray coating liquor; Make film-coated controlled release fertilizer up to accomplishing the coating process
The evaporable solvent is through recycle and reuse, and the packing of product is put in storage.
2. degradable high polymer film-coated controlled release fertilizer according to claim 1 is characterized in that, said TR 301 is a tree elastomer.
3. according to the arbitrary described degradable high polymer film-coated controlled release fertilizer of claim 1-2, it is characterized in that the coating rate is 4～8%.
4. according to the arbitrary described degradable high polymer film-coated controlled release fertilizer of claim 1-2, it is characterized in that fertilizer releasing period is 2～9 months.
5. according to the arbitrary described degradable high polymer film-coated controlled release fertilizer of claim 1-2; It is characterized in that said granulated fertilizer is selected from urea, bicarbonate of ammonia, an ammonium nitrate, ammonium sulfate, diammonium phosphate, primary ammonium phosphate, vitriolate of tartar, Repone K or nitrophosphate fertilizer.
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| CN103449939B (en) * | 2013-08-29 | 2015-06-17 | 山东华垦化肥进出口有限公司 | Thermoplastic resin coated fertilizer and preparation method and coating material thereof |
| CN103435424B (en) * | 2013-09-02 | 2016-03-30 | 济宁道淼新材料科技有限公司 | A kind of slow controlled release coated fertilizer of the pbz polymer micro-nano grain of rice |
| CN103483059B (en) * | 2013-09-02 | 2015-11-25 | 济宁道淼新材料科技有限公司 | The slow controlled release coated fertilizer of high molecular micro nanometer grain entrapping method preparation |
| CN115594551B (en) * | 2022-09-28 | 2023-10-10 | 山东农业大学 | Accurate controlled release membrane material filled with thermosensitive polymer nanoparticles and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105398A (en) * | 1986-07-07 | 1988-01-27 | 窒素公司 | Degradation property mulch film fertilizer |
| CN101357868A (en) * | 2008-08-28 | 2009-02-04 | 山东金正大生态工程股份有限公司 | Thermoplastic resin membrane wrapping modified control-releasing fertilizer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87105398A (en) * | 1986-07-07 | 1988-01-27 | 窒素公司 | Degradation property mulch film fertilizer |
| CN101357868A (en) * | 2008-08-28 | 2009-02-04 | 山东金正大生态工程股份有限公司 | Thermoplastic resin membrane wrapping modified control-releasing fertilizer |
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