CN105237311A - Controlled-release fertilizer for tea tree and preparation method thereof - Google Patents
Controlled-release fertilizer for tea tree and preparation method thereof Download PDFInfo
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- CN105237311A CN105237311A CN201510518114.XA CN201510518114A CN105237311A CN 105237311 A CN105237311 A CN 105237311A CN 201510518114 A CN201510518114 A CN 201510518114A CN 105237311 A CN105237311 A CN 105237311A
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Abstract
The invention discloses a controlled-release fertilizer for a tea tree and a preparation method thereof, belonging to the technical field of preparation of fertilizers. The controlled-release fertilizer for the tea tree comprises the following raw materials by weight: 60 to 140 parts of a packaging material and 200 to 1400 parts of fertilizer granules. The controlled-release fertilizer for the tea tree is prepared by comprising the steps of mixing, stirring, granulating, drying, cooling, packaging, etc.. According to the invention, controlled-release rate of the fertilizer is moderate and stable; nutrition is balanced; the loss rate of the fertilizer can be effectively reduced; utilization efficiency of the fertilizer is improved; healthy growth of the tea tree is promoted; and an average yield of tea leaves is increased by 14.8% to 15.6%.
Description
[technical field]
The invention belongs to fertilizer preparing technical field, be specifically related to a kind of tea tree slow-release fertilizer and preparation method thereof.
[background technology]
China be drink tea, Zhong Cha big country, tealeaves annual production occupies the second in the world.According to plantation geographical position and the difference of kind, tea tree can be gathered 2-4 tealeaves for 1 year, therefore needs to keep continual nutrient supply in the process of growth of tea tree, the especially supply of nitrogenous fertilizer, tea yield just can be made to remain on higher level.
For this reason, someone begins one's study tea tree fertilizer at present.Such as, (application number: the special fertilizer 93102872.8) disclosing tea tree blade face, it comprises the urea of 30%-55%, the glucose of 5%-20%, the sylvite of 10%-25%, the zinc salt of 10%-30% and antibiotic etc. to patent documentation.
More composite fertilizer at present.Such as, patent documentation (patent please number: ZL200910016860.3) disclose tea tree organic and inorganic compound fertilizer, it comprises urea 3-15 part, ammonium sulfate 10-30 part, diammonium phosphate 5-25 part, potassium sulfate 5-15 part and to ferment furfural dregs, scarp and differentiation matchmaker and fermentation fertilizer 40-70 part of obtaining by microbial fermentation inoculum.
But after above Term Fertilization, especially after southern rain-belt is used, wherein soluble inorganic fertilizer can dissolve with fast speed, reduces the effect of Term Fertilization on the one hand, causes fertilizer to waste, also pollute surrounding body in addition.For this reason, people is had to prepare slowly-releasing (controlled release) fertilizer by the mode increasing coating at fertilizer surface.Such as, patent documentation (application number: 03128868.5) disclose a kind of tea tree control release composite fertilizer special, it is made up of coated carbamide and phosphorus potassium complex fertilizer, wherein the ratio of nitrogen, phosphorus, potash fertilizer is 1:0.2-0.5:0.2-0.5, and coated carbamide is made up of urea, urease inhibitors, nitrification inhibitor and organic coated material.Wherein organic coated material is polyacrylic acid or urethane resin, even if the buried underground of the Plastic Resins such as urethane, also needs to decompose decades.Therefore, in this tea tree control release composite fertilizer special, organic coated material usage is many, be then difficult to effectively discharge inner fertilizer, even causes the white pollution of Plastic Resin; And organic coated material usage is few, the soluble componentss such as the urea of infiltration are many, then urea etc. dissolve rapidly after meeting water, and easily make fertiliser granulates form vesicular or disintegration, actual slowly-releasing (controlled release) ability is very limited.
And for example, patent documentation (patent please number: ZL00710115645.X) disclose a kind of special controlled release fertilizer for tree plant, wherein still continue above thinking and use thermoplastic resin, still cannot solve white pollution and slowly-releasing (controlled release) hyperenergia or excessively weak problem.Especially the potash fertilizer of this patent, phosphate fertilizer and trace element not coated parcel, and be only be uniformly mixed with thermoplastic resin membrane wrapping urea, therefore almost do not have slowly-releasing (controlled release) ability of this few constituents.Therefore develop that a kind of controlled release rate is moderate, stable and the fertilizer of environmental protection is development trend.
[summary of the invention]
The invention provides a kind of tea tree slow-release fertilizer and preparation method thereof, to solve fertilizer control release weak effect, the problems such as fertilizer utilization efficiency is low.Fertilizer control release speed of the present invention is moderate and stable, balanced in nutrition, effectively can reduce the turnover rate of fertilizer, improves the utilising efficiency of fertilizer, promotes that tea tree grows up healthy and sound, improves growth of tea plant speed.
For solving above technical problem, the present invention by the following technical solutions:
A kind of tea tree slow-release fertilizer, in units of weight part, comprises following raw material: lapping 60-140 part, fertiliser granulates 200-1400 part;
Described lapping, in units of weight part, comprises following raw material: fatty 50-120 part, bicarbonate of ammonia 3-6 part, calcium phosphate 3-6 part, Repone K 3-6 part, potassium borate 0.2-0.4 part, ferrous sulfate 0.2-0.4 part, zinc chloride 0.2-0.4 part, Mn-Gly 0.2-0.4 part, glycocoll-copper 0.2-0.4 part;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 50-320 part, potassiumphosphate 50-300 part, saltpetre 30-250 part, calcium chloride 12-60 part, borax 10-58 part, zinc nitrate 2-8 part, iron(ic) chloride 2-8 part, Manganous chloride tetrahydrate 2-8 part, cupric chloride 2-8 part, yellow humic acid 30-350 part, polyacrylamide 2-6 part, polyacrylic acid potassium 2-6 part, wilkinite 2-5 part, diatomite 1-4 part, urethane 2-5 part, methylene-bis naphthalene sulfonic acid potassium 1-4 part.
Preferably, described tea tree slow-release fertilizer, in units of weight part, comprises following raw material: lapping 80-120 part, fertiliser granulates 300-1200 part.
Preferably, described fat to carry out processing and fabricating by greasyfoot.
The present invention also provides a kind of preparation method of tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid are mixed and adds water and to stir to obtain uniform mixture, described uniform mixture granulation, oven dry, cooling i.e. obtained fertiliser granulates;
S2: namely fertiliser granulates obtained for step S1 is obtained tea tree slow-release fertilizer with after lapping parcel.
Preferably, the water yield added in step S1 is 650-5000 part.
Preferably, the uniform mixture in step S1 is dried to water content≤8%, is cooled to 25-30 DEG C.
Preferably, in step S1, the particle diameter of fertiliser granulates is 1-3mm.
Preferably, uniform mixture is dried at 50-90 DEG C.
The present invention has following beneficial effect:
(1) fertilizer control release speed of the present invention is moderate and stable, and fertiliser granulates is balanced in nutrition, effectively can reduce the turnover rate of fertilizer, improves the utilising efficiency of fertilizer, and promote that tea tree grows up healthy and sound, tealeaves mean yield improves 14.8%-15.6%;
(2) lapping increases the element such as nitrogen, phosphorus, potassium, calcium, boron, iron, zinc, manganese, copper needed for growth of tea plant, controlled release fertilizer in early stage can be avoided not enough, affect the shortcoming of growth of tea plant;
(3) fat in lapping carries out processing and fabricating by greasyfoot and forms, and can greatly reduce costs;
(4) increase yellow humic acid in fertiliser granulates of the present invention, not only can increase nutriment in a fertilizer, and effectively can improve encapsulation rate, reduce the consumption of lapping, reduce production cost;
(5) increase the water-holding agent such as polyacrylamide, polyacrylic acid potassium in fertiliser granulates of the present invention, soil water-retaining performance, improvement Soil structure, the deep percolation reducing water and loss of soil nutrient, raising efficiency of water application can be strengthened;
(6) increase the amendment such as wilkinite, diatomite in fertiliser granulates of the present invention, can improve soil, increase fertilizer efficiency and stimulate crop growth, wilkinite, diatomite are soil fertilizer conditioner and long agent is urged in soil-repairing agent, plant growth;
(7) dispersion agent such as urethane, methylene-bis naphthalene sulfonic acid potassium is increased in fertiliser granulates of the present invention, the viscosity of fertilizer particle and high molecular polymer can be reduced, fertilizer particle can be made to be quickly dispersed in water, high molecular polymer also can be made simultaneously to play its dispersiveness;
(8) fertilizer component overwhelming majority degradable of the present invention, can not bring environmental pollution;
(9) method for preparing fertilizer of the present invention is simple to operate, is conducive to applying.
[embodiment]
Be specifically described below in conjunction with specific embodiment.
Embodiment 1
A kind of tea tree slow-release fertilizer, in units of weight part, comprises following raw material: lapping 60 parts, fertiliser granulates 1400 parts;
Described lapping is in units of weight part, comprise following raw material: 50 parts, fat, 3 parts, bicarbonate of ammonia, 3 parts, calcium phosphate, 3 parts, Repone K, potassium borate 0.2 part, 0.2 part, ferrous sulfate, zinc chloride 0.2 part, Mn-Gly 0.2 part, glycocoll-copper 0.2 part, described fat carries out processing and fabricating by greasyfoot and forms;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 320 parts, potassiumphosphate 300 parts, 250 parts, saltpetre, 60 parts, calcium chloride, borax 58 parts, zinc nitrate 8 parts, 8 parts, iron(ic) chloride, Manganous chloride tetrahydrate 8 parts, cupric chloride 8 parts, yellow humic acid 350 parts, polyacrylamide 6 parts, polyacrylic acid potassium 6 parts, wilkinite 5 parts, 4 parts, diatomite, urethane 5 parts, methylene-bis naphthalene sulfonic acid potassium 4 parts.
The preparation method of described tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 5000 parts of water and to stir to obtain uniform mixture, described uniform mixture causes particle diameter to be that drying to water content at 50-90 DEG C after 1-3mm particle is 6%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain tea tree slow-release fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 2
A kind of tea tree slow-release fertilizer, is characterised in that, in units of weight part, comprises following raw material: lapping 140 parts, fertiliser granulates 200 parts;
Described lapping is in units of weight part, comprise following raw material: 120 parts, fat, 6 parts, bicarbonate of ammonia, 6 parts, calcium phosphate, 6 parts, Repone K, potassium borate 0.4 part, 0.4 part, ferrous sulfate, zinc chloride 0.4 part, Mn-Gly 0.4 part, glycocoll-copper 0.4 part, described fat carries out processing and fabricating by greasyfoot and forms;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 50 parts, potassiumphosphate 50 parts, 30 parts, saltpetre, 12 parts, calcium chloride, borax 10 parts, zinc nitrate 2 parts, 2 parts, iron(ic) chloride, Manganous chloride tetrahydrate 2 parts, cupric chloride 2 parts, yellow humic acid 30 parts, polyacrylamide 2 parts, polyacrylic acid potassium 2 parts, wilkinite 2 parts, 1 part, diatomite, urethane 2 parts, methylene-bis naphthalene sulfonic acid potassium 1 part.
The preparation method of described tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 650 parts of water and to stir to obtain uniform mixture, described uniform mixture causes particle diameter to be that drying to water content at 50-90 DEG C after 1-3mm particle is 8%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain tea tree slow-release fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 3
A kind of tea tree slow-release fertilizer, is characterised in that, in units of weight part, comprises following raw material: lapping 100 parts, fertiliser granulates 800 parts;
Described lapping, in units of weight part, comprises following raw material: 85 parts, fat, 5 parts, bicarbonate of ammonia, 5 parts, calcium phosphate, 4 parts, Repone K, potassium borate 0.2 part, 0.2 part, ferrous sulfate, zinc chloride 0.2 part, Mn-Gly 0.2 part, glycocoll-copper 0.2 part;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 180 parts, potassiumphosphate 175 parts, 140 parts, saltpetre, 36 parts, calcium chloride, borax 34 parts, zinc nitrate 5 parts, 5 parts, iron(ic) chloride, Manganous chloride tetrahydrate 5 parts, cupric chloride 5 parts, yellow humic acid 195 parts, polyacrylamide 4 parts, polyacrylic acid potassium 4 parts, wilkinite 3 parts, 3 parts, diatomite, urethane 4 parts, methylene-bis naphthalene sulfonic acid potassium 2 parts.
The preparation method of described tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 3000 parts of water and to stir to obtain uniform mixture, described uniform mixture causes particle diameter to be that drying to water content at 50-90 DEG C after 1-3mm particle is 6%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain tea tree slow-release fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 4
A kind of tea tree slow-release fertilizer, in units of weight part, comprises following raw material: lapping 80 parts, fertiliser granulates 1200 parts.
Described lapping is in units of weight part, comprise following raw material: 65 parts, fat, 5 parts, bicarbonate of ammonia, 4.5 parts, calcium phosphate, 4 parts, Repone K, potassium borate 0.3 part, 0.3 part, ferrous sulfate, zinc chloride 0.3 part, Mn-Gly 0.3 part, glycocoll-copper 0.3 part, described fat carries out processing and fabricating by greasyfoot and forms;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 295 parts, potassiumphosphate 250 parts, 200 parts, saltpetre, 46 parts, calcium chloride, borax 40 parts, zinc nitrate 6 parts, 6 parts, iron(ic) chloride, Manganous chloride tetrahydrate 6 parts, cupric chloride 6 parts, yellow humic acid 320 parts, polyacrylamide 5 parts, polyacrylic acid potassium 5 parts, wilkinite 4 parts, 4 parts, diatomite, urethane 4 parts, methylene-bis naphthalene sulfonic acid potassium 3 parts.
The preparation method of described tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 4500 parts of water and to stir to obtain uniform mixture, described uniform mixture causes particle diameter to be that drying to water content at 50-90 DEG C after 1-3mm particle is 5%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain tea tree slow-release fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 5
A kind of tea tree slow-release fertilizer, in units of weight part, comprises following raw material: lapping 120 parts, fertiliser granulates 300 parts.
Described lapping, in units of weight part, comprises following raw material: 103 parts, fat, 5 parts, bicarbonate of ammonia, 5 parts, calcium phosphate, 5 parts, Repone K, potassium borate 0.4 part, 0.4 part, ferrous sulfate, zinc chloride 0.4 part, Mn-Gly 0.4 part, glycocoll-copper 0.4 part;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 54 parts, potassiumphosphate 60 parts, 50 parts, saltpetre, 34 parts, calcium chloride, borax 20 parts, zinc nitrate 4 parts, 4 parts, iron(ic) chloride, Manganous chloride tetrahydrate 4 parts, cupric chloride 4 parts, yellow humic acid 50 parts, polyacrylamide 3 parts, polyacrylic acid potassium 3 parts, wilkinite 3 parts, 2 parts, diatomite, urethane 3 parts, methylene-bis naphthalene sulfonic acid potassium 2 parts.
The preparation method of described tea tree slow-release fertilizer, comprises the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 1500 parts of water and to stir to obtain uniform mixture, described uniform mixture causes particle diameter to be that drying to water content at 50-90 DEG C after 1-3mm particle is 7%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain tea tree slow-release fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
For verifying the effect of tea tree slow-release fertilizer of the present invention, by following experimental verification.
(1) the result of extraction experiment of Wrapped fertilizer
Tea tree slow-release fertilizer prepared by Example 1,2,3, and Example 1 prepare without Wrapped fertilizer and with the fertilizer of polyethylene parcel in contrast, be immersed in clear water, at different time water sampling detection fertilizer solubility rate wherein, result is as shown in the table.
As seen from the above table, almost all dissolve at once without Wrapped fertilizer, show not there is slow releasing function; The fertilizer wrapped up with polyethylene, except not having the fertiliser granulates of environmental sealing (encapsulating) in initial dissolving, almost no longer disengages fertilizer thereafter; The encapsulation rate of tea tree slow-release fertilizer prepared by embodiment 1,2,3 is higher, and the fertilizer of major part encapsulating continues to disengage later.
(2) tea tree fertilization effect experiment
Experiment 1: the present inventor entrusts Guigang, Guangxi to plant tea tree company, with tea tree slow-release fertilizer prepared by embodiment 1, manurial experiment is carried out to tea tree, use once before the spring sprouts for annual, simultaneously with embodiment 1 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is higher by 14.8% than the tealeaves mean yield of control group.
Experiment 2: the present inventor entrusts Nanning to plant tea tree company, with tea tree slow-release fertilizer prepared by embodiment 2, manurial experiment is carried out to tea tree, use once before the spring sprouts for annual, simultaneously with embodiment 2 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is higher by 15.6% than the tealeaves mean yield of control group.
Experiment 3: the present inventor entrusts City: A Case Study in Baise to plant tea tree company, with tea tree slow-release fertilizer prepared by embodiment 3, manurial experiment is carried out to tea tree, use once before the spring sprouts for annual, simultaneously with embodiment 3 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is higher by 15.2% than the tealeaves mean yield of control group.
Comprehensive above experiment 1,2,3 known, tealeaves mean yield improves 14.8%-15.6%, visible tea tree slow-release fertilizer of the present invention, effectively can reduce the turnover rate of fertilizer, improve the utilising efficiency of fertilizer, simultaneously balanced in nutrition, can promote that tea tree grows up healthy and sound, improve growth of tea plant speed.
Above content can not assert that the present invention specifically implements to be confined to these explanations; for general technical staff of the technical field of the invention; do not departing under concept thereof of the present invention; some simple deduction or replace can also be made, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (8)
1. a tea tree slow-release fertilizer, is characterized in that, in units of weight part, comprises following raw material: lapping 60-140 part, fertiliser granulates 200-1400 part;
Described lapping, in units of weight part, comprises following raw material: fatty 50-120 part, bicarbonate of ammonia 3-6 part, calcium phosphate 3-6 part, Repone K 3-6 part, potassium borate 0.2-0.4 part, ferrous sulfate 0.2-0.4 part, zinc chloride 0.2-0.4 part, Mn-Gly 0.2-0.4 part, glycocoll-copper 0.2-0.4 part;
Described fertiliser granulates, in units of weight part, comprises following raw material: primary ammonium phosphate 50-320 part, potassiumphosphate 50-300 part, saltpetre 30-250 part, calcium chloride 12-60 part, borax 10-58 part, zinc nitrate 2-8 part, iron(ic) chloride 2-8 part, Manganous chloride tetrahydrate 2-8 part, cupric chloride 2-8 part, yellow humic acid 30-350 part, polyacrylamide 2-6 part, polyacrylic acid potassium 2-6 part, wilkinite 2-5 part, diatomite 1-4 part, urethane 2-5 part, methylene-bis naphthalene sulfonic acid potassium 1-4 part.
2. tea tree slow-release fertilizer according to claim 1, is characterized in that, in units of weight part, comprises following raw material: lapping 80-120 part, fertiliser granulates 300-1200 part.
3. sugarcane controlled-release fertilizer according to claim 1, is characterized in that, described fat carries out processing and fabricating by greasyfoot.
4. a preparation method for the tea tree slow-release fertilizer according to any one of claim 1-3, is characterized in that, comprise the following steps:
S1: primary ammonium phosphate, potassiumphosphate, saltpetre, calcium chloride, borax, zinc nitrate, iron(ic) chloride, Manganous chloride tetrahydrate, cupric chloride, yellow humic acid are mixed and adds water and to stir to obtain uniform mixture, described uniform mixture granulation, oven dry, cooling i.e. obtained fertiliser granulates;
S2: namely fertiliser granulates obtained for step S1 is obtained tea tree slow-release fertilizer with after lapping parcel.
5. the preparation method of tea tree slow-release fertilizer according to claim 4, is characterized in that, the water yield added in step S1 is 650-5000 part.
6. the preparation method of tea tree slow-release fertilizer according to claim 4, is characterized in that, the uniform mixture in step S1 is dried to water content≤8%, is cooled to 25-30 DEG C.
7. the preparation method of tea tree slow-release fertilizer according to claim 4, is characterized in that, in step S1, the particle diameter of fertiliser granulates is 1-3mm.
8. the preparation method of tea tree slow-release fertilizer according to claim 6, is characterized in that, uniform mixture is dried at 50-90 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631561A (en) * | 2016-11-18 | 2017-05-10 | 安徽新视野园林绿化工程有限公司 | Special organic fertilizer for tea trees |
| CN108059528A (en) * | 2017-12-18 | 2018-05-22 | 梅庆波 | A kind of preparation method of drought resistance agent |
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| CN102584439A (en) * | 2012-02-08 | 2012-07-18 | 叶长东 | Tea tree slow-release fertilizer and preparation technology thereof |
| CN102910978A (en) * | 2012-11-21 | 2013-02-06 | 尹明灯 | Large-particle slow/controlled-release fertilizer with multi-layer coating structure and coating equipment of fertilizer |
| CN104016791A (en) * | 2014-05-23 | 2014-09-03 | 广西地源之本肥业有限公司 | Fertilizer special for tea tree |
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| US5030267A (en) * | 1988-11-14 | 1991-07-09 | Nutrihold Inc. | Method of preparing controlled release fertilizers and products thereof |
| EP0867422A2 (en) * | 1997-03-26 | 1998-09-30 | Central Glass Company, Limited | Coated granular fertilizer and method for producing same |
| CN201678605U (en) * | 2010-05-04 | 2010-12-22 | 安徽省司尔特肥业股份有限公司 | Special composite particle slow-release fertilizer for tea tree |
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| CN106631561A (en) * | 2016-11-18 | 2017-05-10 | 安徽新视野园林绿化工程有限公司 | Special organic fertilizer for tea trees |
| CN108059528A (en) * | 2017-12-18 | 2018-05-22 | 梅庆波 | A kind of preparation method of drought resistance agent |
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