CN102424640A - Two-layer coated water-retaining sustained-release fertilizer and preparation method thereof - Google Patents
Two-layer coated water-retaining sustained-release fertilizer and preparation method thereof Download PDFInfo
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- CN102424640A CN102424640A CN2011102757120A CN201110275712A CN102424640A CN 102424640 A CN102424640 A CN 102424640A CN 2011102757120 A CN2011102757120 A CN 2011102757120A CN 201110275712 A CN201110275712 A CN 201110275712A CN 102424640 A CN102424640 A CN 102424640A
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Abstract
The invention discloses a two-layer coated water-retaining sustained-release fertilizer and a preparation method thereof. The two-layer coated water-retaining sustained-release fertilizer comprises fertilizer particles and two-layer coatings coating the surfaces of the fertilizer particles; an inner-membrane controlled-release layer is made of carrageenan and soluble potassium salt or soluble ammonium salt; and an outer-membrane water-retaining layer is made of high water absorption resin. The two-layer coated water-retaining sustained-release fertilizer provides various nutrient elements required by plants, and improves the sustained release property of the nutrient elements; meanwhile, through the combination of the fertilizer and the water absorption resin, the two-layer coated water-retaining sustained-release fertilizer has multiple functions of absorbing and retaining water, performing sustained release, conditioning soil and the like.
Description
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Technical field
The present invention relates to the slow-release or control-release fertilizer technical field, particularly relate to a kind of water-holding slow-release fertilizer and preparation method thereof with double-deck coating.
Background technology
Chemical fertilizer occupies the effect that tool is wanted in agriculture prodn, Food and Argriculture OrganizationFAO's conclusion: in the raising the output of developing country's grain, account for 55% from the effect of chemical fertilizer.In China's chemical fertilizer this season utilization ratio, nitrogen is about 30%～35% at present, and phosphorus is 10%～25%, and potassium is 35%～50%, far below world developed country level.Causing the low major cause of utilization rate of fertilizer is leaching loss, especially with nitrogenous fertilizer, potash fertilizer for.People are making great efforts to seek to improve the method for utilization rate of fertilizer, and one of them is that fertilizer itself is carried out modification, and exploitation is suitable for the new-type fertilizer of plant growth demand.The development slowly/controlled releasing fertilizer is one of effective measure of generally adopting of countries in the world.The advantage of slow release fertilizer is that utilization ratio is high, and nutrient loss is few, environmental friendliness.In various sustained-controll-release fertilisers, polymer coated controlled release fertilizer more should satisfy the nutrient demand of crop growth period again with the accurate sustained release of nutrient, and therefore, the tempo that polymer coated controlled release is fertile in recent years is very fast.But the used high molecular polymer as slow-release material generally is that difficult degradation maybe can not be degraded at present, and long-term application also can cause soil pollution; And need heating in producing and use organic solvent.Since the last century the nineties, some Japanese firms have developed the polyolefine coated fertilizer in succession and have realized industrialization, and the patent that has a collection of coating controlled-release fertilizer to make successively is open; Like JP 2002-234790; CN 1749220A, JP 2004-217434, JP 2000-185991.Can find out that from these external releasable material proportionings the coating layer material all contains polyolefine, also there is this type of patent in China, is PS, Vestolen PP 7052, Vilaterm like the lapping of publication number CN 101462907A.The main drawback that above-mentioned each release and release control fertilizer exists is: some organic solvent such as benzene, YLENE and the halohydrocarbon that use in the production have severe toxicity, even forbid both at home and abroad at present.Therefore, very high to the sealing requirements of production unit, thus increased the equipment input cost.In addition, the residual film of polymkeric substance that controlled release is fertile is very long at the degraded in soil required time, is prone to cause the secondary pollution to soil.
In addition, the film of coated fertilizer receives physical damage easily when packing, transportation, use, will lose the slow controlled capability to fertilizer like this.
Like " a kind of preparation method of granular compound fertilizer " of publication number CN 101891543 A with the crosslinked sodium-alginate of calcium chloride; Because the crosslinked control of its solid state reaction is inhomogeneous; Cause its initial stage release rate too fast; Wherein the burst size of urea is up to 92.8% in 5 days, and burst size is also near 70% and 80% in other two kinds of fertilizer phosphorus and the potassium 5 days.
In addition, fertilizer and water are two big factors of restriction agriculture prodn development, and it is vital how improving water resources and fertilizer utilization ratio.Because China's the greater part rainfall is relatively concentrated (4-September); And have rainfall big, last short characteristics; This make cultivation farm crop dry season (10-March) water resources lack, and rainy season the moisture content utilization ratio not high, support in the fertilizer part run off serious.Super absorbent resin is also claimed super-strong moisture absorbing property polymkeric substance (Superabsorbent Polymer is abbreviated as SAP), can absorb a large amount of water within a short period of time, and can keep moisture adding to depress also.One of main application of super absorbent resin is exactly the utilization ratio that is used for improving on agricultural and the gardening water.And by after being applied in the soil, it also has air permeability, the stability of improving soil and prevents function such as Soil degradation.The optimal combination of slow release fertilizer and super strength water absorbent can be improved nutritional status, the minimizing water soluble fertilizer of plant frequency is irrigated in spinoff, reduction moisture evaporation speed and the minimizing of environment.
Summary of the invention
The present invention seeks to overcome the deficiency of prior art, a kind of double-deck coating water-holding slow-release fertilizer and preparation method thereof is provided.
The double-deck coating water-holding slow-release of the present invention is fertile; Form by chemical fertilizer granule and the inner membrance controlled release layer and the adventitia water conservation layer that are wrapped in said chemical fertilizer granule surface; The constituent material of said inner membrance controlled release layer comprises carrageenin and soluble potassium salt or solubility ammonium salt, and the constituent material of said adventitia water conservation layer comprises super absorbent resin.
Said chemical fertilizer granule is any one fertilizer in nitrogenous, phosphorus, the potassium, or wherein any two or three composite fertilizer.
Said super absorbent resin is one or more in starch based (promptly being the super absorbent resin of feedstock production with the starch grafted acrylate), cellulose family (taking the CMC 99.5 as the super absorbent resin of grafting parent preparation), synthetic type (monomer with vinylformic acid or acrylic amide carries out grafting); With said chemical fertilizer granule ratio of weight and number be 1～30:70～99, be preferably 8～15:85～92.
Said inner membrance controlled release layer is the crosslinked carrageenin internal layer coating of soluble potassium salt or solubility ammonium salt, and the content of carrageenin and said chemical fertilizer granule ratio of weight and number are 1～20:80～99, are preferably 3～10:90～97; The crosslinked consumption of sylvite or solubility ammonium salt be the carrageenin consumption (with K
+Or NH
4 +Metering) 0.1%～30%, preferred 10%～15%; As containing sylvite or ammonium salt in the fertilizer, can direct crosslinked carrageenin, then need not add soluble potassium salt or solubility ammonium salt.
The fertile preparation method of the double-deck coating water-holding slow-release of the present invention comprises following process step:
(1) chemical fertilizer granule of in tablets press, putting into; Spray into atomized water with particle surface wetting after; The carrageenin powder is joined in the tablets press; It is outer to make carrageenin be wrapped in the fertilizer kernel, and spray into sylvite and/or ammonium salt aqueous solution carrageenin is carried out crosslinked, the carrageenin as fertilizer sources inner membrance controlled release layer after crosslinked;
(2) the super absorbent resin powder is joined in the tablets press, make the super absorbent resin powder wrapped outer, as fertilizer sources adventitia water-absorbing-retaining layer at fertiliser granulates;
(3) after the fertiliser granulates drying that coating is accomplished, be finished product.
The fertile another kind of preparation method of the double-deck coating water-holding slow-release of the present invention comprises following process step:
(1) carrageenan solutions is sprayed chemical fertilizer granule, spray into then sylvite and/or ammonium salt aqueous solution carrageenin is carried out crosslinked, the carrageenin as fertilizer sources inner membrance controlled release layer after crosslinked;
(2) with super absorbent resin solution spraying chemical fertilizer granule, as fertilizer sources adventitia water-absorbing-retaining layer;
(3) after the fertiliser granulates drying that coating is accomplished, be finished product.
The used coated fertilizer of the present invention is polysaccharide and degradable polymer, aborning without organic solvent, need not heating, compares with foregoing patent documentation, has advantages such as asepsis environment-protecting is energy-conservation.Except using outside linking agent, the urea of its as fertilizer sources, potash fertilizer also provide more crosslinked group, at these K
+Or NH
4 +During effusion, carrageenin can be further crosslinked, makes it can form a good internal layer controlled release coating, and the gel parcel that the skin of this insoluble gel is formed by super absorbent resin again forms a stable gel group.The formation hydrogel because crosslinked carrageenin can absorb water in a large number, better than the water absorbing and retaining properties of single use super absorbent resin.
The test result of the sustained release performance in soil shows that this product was no more than 75% in the time of the 28th day, and the conform european standard council (CEN) shows that to the slowly-releasing standard of slow release fertilizer it has the good slow release performance.
After this product adds soil; Not only improve the water-retaining capacity of soil, also have water-retaining effect ability preferably simultaneously, the evaporation that can slow down moisture in the soil; Slowly discharge the moisture of being stored; It is fully absorbed by crop, effectively improve the utilization ratio of water resources, application promise in clinical practice is arranged in arid, lack of water or the big area of daily evaporation amount.Simultaneously, nutrient discharges along with the release of moisture.Double-deck coating water-holding slow-release fertilizer in the soil after the swelling resembles a miniature reservoir that keeps moisture and nutrient, can improve the utilization ratio of moisture and nutrient simultaneously.
Description of drawings
Fig. 1 is the slowly-releasing of double-deck coating water-holding slow-release urea in soil;
Fig. 2 is the water retention property of double-deck coating water-holding slow-release urea in soil;
Fig. 3 is the slowly-releasing of double-deck coating water-keeping slow release composite fertilizer in soil;
Fig. 4 is the water retention property of double-deck coating water-keeping slow release composite fertilizer in soil.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated, but not only for so, the umber of raw material is mass fraction among the embodiment.
Embodiment 1
(1) the double-deck coating water-holding slow-release carbamide fertilizer of preparation
In granulating disc (the auspicious permanent machinofacture in Zhengzhou ltd; ZL10) the lining urea granules that to put into 90 parts of diameters be l-2mm; Spray into atomized water with the urea granules moistened surface after; The carrageenin powder of 10 parts of mistake 110 mesh sieves is joined the coating that rolls in the granulating disc, make to be wrapped on the fertilizer kernel, because urea and water generates ammonium ion (NH
4 +), crosslinked carrageenin.At last 10 parts of water-absorbent resin powders that prepare (agricultural high-hygroscopicity resin, NIPPO, Japanese catalyst) are joined the coating that rolls in the disk, make water-absorbent resin powder be wrapped in the fertiliser granulates skin, the outer coating of as fertilizer sources.Room temperature is dried then, promptly obtains double-deck coating water-holding slow-release carbamide fertilizer finished product.
(2) performance test of the water-holding slow-release of double-deck coating water-holding slow-release carbamide fertilizer (specimen in use is embodiment 1 gained)
2.1. the mensuration of water-intake rate (Wa)
Accurately take by weighing the double-deck coating water-holding slow-release urea of 1 gram, put into the beaker that is added with the 200mL tap water, soak after 90 minutes under the room temperature and filter with self-control nylon wire (aperture 0.076mm); And left standstill on the net 5 minutes; Take off and weigh, note is made Mi, and water-intake rate is pressed Wa=Mi-1 and calculated.
Sample is inhaled 89 times in tap water under normal pressure, be 79 times and have only super strength water absorbent coated urea particle (self-control sample, the preparation method is identical with embodiment 1, but does not add carrageenin) to inhale tap water.
2.2. slow-releasing is measured:
Get and put into the 300mL beaker after the double-deck coating water-holding slow-release urea of 1 gram mixes with 180 gram dry ground (cross 26 mesh sieves), add 120 gram tap water, parallel doing 8 (keeping in the various kinds water-content constant through adding zero(ppm) water in the experimentation); Respectively at 1,2,5; 10,15,20; Got one in 25,30 days, with 0.01MCaCl
2Nitrogen content is surveyed in the solution lixiviate.Do blank and two control samples simultaneously; Wherein do not add fertilizer in the blank, add the urea without any processing with nitrogen content such as the double-deck coating water-holding slow-release of 1g urea in control samples, what add 1 gram in another control samples has only super strength water absorbent coated urea particle (self-control sample; The preparation method is identical with embodiment 1; But do not add carrageenin, inhaling tap water is 79 times), wherein the double-deck coating water-holding slow-release of the total nitrogen content of urea and 1g urea is equal to.Nitrogen content is measured with the Kelvin cooking method that disappears in the various kinds.Calculate the release ratio.
Like Fig. 1, urea surpasses 95% at its nutrient release amount on the same day that adds soil; And the super absorbent resin coated urea in being added to soil after, nutrient release rate is compared with pure urea and is slowed down to some extent, but still apparently higher than the rate of release of the nitrogen of double-deck coating water-holding slow-release urea.Double-deck coating water-holding slow-release urea is in the time of the 2nd, 5 and 30 day, and the burst size of nitrogen is respectively 9,16 and 69wt%.Be no more than 75% in the time of the 28th day, the conform european standard council (CEN) shows that to the slowly-releasing standard of slow release fertilizer it has the good slow release performance.
2.3. the maximum measurement of water-content coefficient of soil
Used soil is taken from Linyi, Shandong in the experiment.Get the double-deck coating water-holding slow-release urea of 5 grams and mix with 495 gram dry ground (mistake 26 mesh sieves), the diameter 4.5cm that packs into then, the bottom is surrounded by in the pvc pipe of gauze (aperture 0.076mm), and weigh (being designated as).To manage unsettled the pouring gradually from top, till the bottom has water to ooze out, leave standstill, treat weigh when no longer oozing out (being designated as Ww) into tap water.Do control experiment (do not add double-deck coating water-holding slow-release urea, all the other conditions are with above-mentioned) simultaneously, the maximum water ratio of soil (being designated as W%) is calculated as follows: W=[(Ww ﹣ Wd)/(Ww ﹣ Wd ﹢ 500)] * 100%
Experiment shows that the maximum water ratio that does not add the soil of double-deck coating water-holding slow-release urea is 30.2%, and the maximum water ratio of soil is 42.5% behind the adding fertilizer, improves about 12.3%.This shows that prepared fertilizer has water absorbing properties preferably in soil, can obviously improve soil moisture content, effective storing rainwater or irrigation water, thus improve water utilization rate.This is its big advantage of comparing with general slow release fertilizer.
2.4. soil water-retaining property mensuration
To get in the 1000mL beaker of packing into after 5 double-deck coating water-holding slow-release urea of gram and 495 gram dry ground (crossing 26 mesh sieves) mix, add 500 gram tap water, weigh; The room temperature held was whenever weighed once at a distance from 5 days, was designated as Wi.; Day-night observation 30 days; Do control experiment (do not add double-deck coating water-holding slow-release urea, all the other conditions are with above-mentioned) simultaneously, moisture retention (being designated as W%) is calculated as follows: W=[(Wi ﹣ 500)/500] * 100%
Like Fig. 2, the water retention property of soil that adds double-deck coating water-holding slow-release urea is better than the water-retentivity of the soil that does not add.After one month, the soil moisture content that contains double-deck coating water-holding slow-release urea exceeds about 28% than what do not add.Explain after prepared double-deck coating water-holding slow-release carbamide fertilizer adds soil and not only have water-retaining capacity preferably; Also has water retention capacity preferably simultaneously; Can slow down the evaporation of moisture in the soil, slowly discharge the moisture of being stored, it is fully absorbed by crop; Effectively improve the utilization ratio of water resources, application promise in clinical practice is arranged in arid, lack of water or the big area of daily evaporation amount.
Embodiment 2
(1) the double-deck coating water-keeping slow release composite fertilizer of preparation
In granulating disc (the auspicious permanent machinofacture in Zhengzhou ltd; ZL10) the lining nitrogen-phosphorus-potassium compound fertilizer particle that to put into 92 parts of diameters be l-2mm (providing) by ecological fertile industry ltd of Shandong happiness Toyota, spray into atomized water with particle surface wetting after, the carrageenin powder of 8 parts of mistake 110 mesh sieves is joined the coating that rolls in the granulating disc; Make and be wrapped on the fertilizer kernel; Spray into 5% the KCl aqueous solution and carrageenin is carried out crosslinked, consumption is 8% of a carrageenin dry weight, crosslinked carrageenin.At last 10 parts of water-absorbent resin powders that prepare (agricultural high-hygroscopicity resin, NIPPO, Japanese catalyst) are joined the coating that rolls in the disk, make water-absorbent resin powder be wrapped in the fertiliser granulates skin, the outer coating of as fertilizer sources.Room temperature is dried then, promptly obtains double-deck coating water-keeping slow release composite fertilizer finished product.
(2) performance test of the water-holding slow-release of double-deck coating water-keeping slow release composite fertilizer (specimen in use is embodiment 2 gained)
2.1. the mensuration of water-intake rate (Wa)
Accurately take by weighing the double-deck coating water-keeping slow release composite fertilizer of 1 gram, put into the beaker that is added with the 200mL tap water, soak after 90 minutes under the room temperature and filter with self-control nylon wire (aperture 0.076mm); And left standstill on the net 5 minutes; Take off and weigh, note is made Mi, and water-intake rate is pressed Wa=Mi-1 and calculated.
Under normal pressure, inhale 96 times in tap water
2.2. slow-releasing is measured:
Get and put into the 200mL beaker after the double-deck coating water-keeping slow release composite fertilizer of 1 gram mixes with 180 gram dry ground (cross 26 mesh sieves), add 60 gram tap water, parallel doing 8 (keeping in the various kinds water-content constant through adding zero(ppm) water in the experimentation); Respectively at 1,2,5; 10,15,20; Got one in 25,30 days.Be used for measuring the content of remaining N, P and K.Nitrogen content is measured with elemental analyser, and potassium and phosphorus content are measured with the inductive coupling plasma spectrometer.Calculate the release ratio.
Like Fig. 3, its result can find out: after 30 days, the burst size of N, P and K is respectively 58 %, 61% and 74.8%.These data show that double-deck coating water-keeping slow release composite fertilizer has good slow release property in soil.Be no more than 75% in the time of the 28th day, the conform european standard council (CEN) shows that to the slowly-releasing standard of slow release fertilizer it has the good slow release performance.
2.3. the maximum measurement of water-content coefficient of soil
Used soil is taken from Linyi, Shandong in the experiment.Get the double-deck coating water-keeping slow release composite fertilizers of 5 grams and mix with 495 gram dry ground (mistake 26 mesh sieves), the diameter 4.5cm that packs into then, the bottom is surrounded by in the pvc pipe of gauze (aperture 0.076mm), and weigh (being designated as Wd).To manage unsettled the pouring gradually from top, till the bottom has water to ooze out, leave standstill, treat weigh when no longer oozing out (being designated as Ww) into tap water.Do control experiment (do not add double-deck coating water-holding slow-release urea, all the other conditions are with above-mentioned) simultaneously, the maximum water ratio of soil (being designated as W%) is calculated as follows: W=[(Ww ﹣ Wd)/(Ww ﹣ Wd ﹢ 500)] * 100%
Experiment shows that the maximum water ratio that does not add the soil of double-deck coating water-keeping slow release composite fertilizer is 28.8%, and the maximum water ratio of soil is 41.5% behind the adding fertilizer, improves about 12.7%.This shows that prepared fertilizer has water absorbing properties preferably in soil, can obviously improve soil moisture content, effective storing rainwater or irrigation water, thus improve water utilization rate.This is its big advantage of comparing with general slow release fertilizer.
2.4. soil water-retaining property mensuration
Weigh by 4.3 gained soil, the room temperature held was whenever weighed once at a distance from 5 days, was designated as Wi., and day-night observation is done control experiment (do not add double-deck coating water-keeping slow release composite fertilizer, all the other conditions are with above-mentioned) simultaneously, and moisture retention (being designated as W%) is calculated as follows:
W=[(Wi﹣500)／500]?×100%
Like Fig. 4, the water retention property of soil that adds double-deck coating water-keeping slow release composite fertilizer is better than the water-retentivity of the soil that does not add.After 20 days, the blank soil moisture that does not contain double-deck coating water-keeping slow release composite fertilizer evaporates fully to be done, and for the soil water-retaining rate that is added with double-deck coating water-keeping slow release composite fertilizer still up to 16.8wt%.Simultaneously, we also observe the soil hardening and little crackle is arranged in the time of at room temperature 10 days that does not add double-deck coating water-keeping slow release composite fertilizer, present polygon fully by 13 days, and the soil that is added with double-deck coating water-keeping slow release composite fertilizer does not have the crack.Show after prepared double-deck coating water-keeping slow release composite fertilizer adds soil and not only have water-retaining capacity preferably; Also has water-retaining effect ability preferably simultaneously; Can slow down the evaporation of moisture in the soil, slowly discharge the moisture of being stored, it is fully absorbed by crop; Effectively improve the utilization ratio of water resources, application promise in clinical practice is arranged in arid, lack of water or the big area of daily evaporation amount.Simultaneously, nutrient discharges along with the release of moisture.Double-deck coating water-keeping slow release composite fertilizer in the soil after the swelling resembles a miniature reservoir that keeps moisture and nutrient, can improve the utilization ratio of moisture and nutrient simultaneously.
Claims (6)
1. a double-deck coating water-holding slow-release is fertile; It is characterized in that: form by chemical fertilizer granule and the inner membrance controlled release layer and the adventitia water conservation layer that are wrapped in said chemical fertilizer granule surface; The constituent material of said inner membrance controlled release layer comprises carrageenin and soluble potassium salt or solubility ammonium salt, and the constituent material of said adventitia water conservation layer comprises super absorbent resin.
2. double-deck coating water-holding slow-release according to claim 1 is fertile, it is characterized in that: said chemical fertilizer granule is any one fertilizer in nitrogenous, phosphorus, the potassium, or wherein any two or three composite fertilizer.
3. double-deck coating water-holding slow-release according to claim 1 and 2 is fertile, it is characterized in that: said super absorbent resin is one or more in starch based (promptly being the super absorbent resin of feedstock production with the starch grafted acrylate), cellulose family (taking the CMC 99.5 as the super absorbent resin of grafting parent preparation), synthetic type (monomer with vinylformic acid or acrylic amide carries out grafting); With said chemical fertilizer granule ratio of weight and number be 1～30:70～99, be preferably 8～15:85～92.
4. double-deck coating water-holding slow-release according to claim 1 and 2 is fertile; It is characterized in that: said inner membrance controlled release layer is the crosslinked carrageenin internal layer coating of soluble potassium salt or solubility ammonium salt; The content of carrageenin and said chemical fertilizer granule ratio of weight and number are 1～20:80～99, are preferably 3～10:90～97; The crosslinked consumption of sylvite or solubility ammonium salt be the carrageenin consumption (with K
+Or NH
4 +Metering) 0.1%～30%, preferred 10%～15%; As containing sylvite or ammonium salt in the fertilizer, can direct crosslinked carrageenin, then need not add soluble potassium salt or solubility ammonium salt.
5. the fertile preparation method of double-deck coating water-holding slow-release according to claim 1 and 2 is characterized in that comprising following process step:
(1) chemical fertilizer granule of in tablets press, putting into; Spray into atomized water with particle surface wetting after; The carrageenin powder is joined in the tablets press; It is outer to make carrageenin be wrapped in the fertilizer kernel, and spray into sylvite and/or ammonium salt aqueous solution carrageenin is carried out crosslinked, the carrageenin as fertilizer sources inner membrance controlled release layer after crosslinked;
(2) the super absorbent resin powder is joined in the tablets press, make the super absorbent resin powder wrapped outer, as fertilizer sources adventitia water-absorbing-retaining layer at fertiliser granulates;
(3) after the fertiliser granulates drying that coating is accomplished, be finished product.
6. the fertile preparation method of double-deck coating water-holding slow-release according to claim 1 and 2 is characterized in that comprising following process step:
(1) carrageenan solutions is sprayed chemical fertilizer granule, spray into then sylvite and/or ammonium salt aqueous solution carrageenin is carried out crosslinked, the carrageenin as fertilizer sources inner membrance controlled release layer after crosslinked;
(2) with super absorbent resin solution spraying chemical fertilizer granule, as fertilizer sources adventitia water-absorbing-retaining layer;
(3) after the fertiliser granulates drying that coating is accomplished, be finished product.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10101465A (en) * | 1996-09-25 | 1998-04-21 | Seto Seido Kk | Controlled release fertilizer |
| JP2003165788A (en) * | 2001-09-19 | 2003-06-10 | Sumitomo Chem Co Ltd | Coated granular ammonium nitrate lime |
| CN101362662A (en) * | 2008-09-03 | 2009-02-11 | 阎宗彪 | Coating sustained-released disposable fertilizer |
| CN101891543A (en) * | 2010-07-14 | 2010-11-24 | 兰州大学 | Method for preparing granular compound fertilizer |
-
2011
- 2011-09-17 CN CN201110275712A patent/CN102424640B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10101465A (en) * | 1996-09-25 | 1998-04-21 | Seto Seido Kk | Controlled release fertilizer |
| JP2003165788A (en) * | 2001-09-19 | 2003-06-10 | Sumitomo Chem Co Ltd | Coated granular ammonium nitrate lime |
| CN101362662A (en) * | 2008-09-03 | 2009-02-11 | 阎宗彪 | Coating sustained-released disposable fertilizer |
| CN101891543A (en) * | 2010-07-14 | 2010-11-24 | 兰州大学 | Method for preparing granular compound fertilizer |
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| CN109265272A (en) * | 2018-11-29 | 2019-01-25 | 西安唯拓尔农业科技有限公司 | A kind of slow-release or control-release fertilizer particle with the double-deck coating |
| CN109734509A (en) * | 2019-02-19 | 2019-05-10 | 山东农业大学 | A kind of film-coated controlled release fertilizer and preparation method thereof of the self assembly selfreparing of loading functional substance |
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