CN105085054A - Lychee release-control fertilizer and preparation method thereof - Google Patents
Lychee release-control fertilizer and preparation method thereof Download PDFInfo
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- CN105085054A CN105085054A CN201510518133.2A CN201510518133A CN105085054A CN 105085054 A CN105085054 A CN 105085054A CN 201510518133 A CN201510518133 A CN 201510518133A CN 105085054 A CN105085054 A CN 105085054A
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Abstract
The invention discloses a lychee release-control fertilizer and a preparation method thereof and belongs to the technical field of fertilizer preparation. The lychee release-control fertilizer comprises, by weight, 60 to 120 parts of coating material and 200 to 1200 parts of fertilizer granules; the lychee release-control fertilizer is prepared by steps of mixing, granulating, drying, cooling, coating and the like. The lychee release-control fertilizer has a moderate and stable release control speed, has balanced nutrition and is effective in reducing its loss rate, improving its availability and promoting healthy growth of lychee, lychee yield is averagely increased by 11.6% to 12.8%, and lychee sugar content is increased by 0.32% to 0.39%.
Description
[technical field]
The invention belongs to fertilizer preparing technical field, be specifically related to a kind of lichee release and release control fertilizer and preparation method thereof.
[background technology]
China is the lichee country of origin and the first in the world big producing country, and culture area and output account for global 81% and 70% respectively, in the structure of rural undertaking of the lichee main producing regions such as Guangdong, Guangxi, Fujian, Hainan, have critical role.Due to fruit economy and be of high nutritive value, consumption increase severely.For a long time, although culture technology obtains tremendous development, orchard worker applies fertilizer and mostly uses traditional fertilizer.Such as, patent documentation (application number: 201010585728.7) disclose litchi formula fertilizer, it comprises urea 240-260 jin, calcium superphosphate 290-310 jin, calcium magnesium phosphorus 90-110 jin, Repone K 340-360 jin etc., in use there is many problems in these fertilizer, rate of fertilizer application rapidly increases, but the not corresponding growth of output, produce the problems such as Cracking fruit is high, fruit quality is low simultaneously.
In addition, 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: 201210423975.6) disclose the synchronous Controlled Release Fertilizer of a kind of lichee special nutritional, obtained through mixing by Polymer coated urea, urea, diammonium phosphate, calcium magnesium phosphorus, Repone K and borax, and coated carbamide be polyurethanes reaction film Polymer coated urea, epoxy resin is reacted into membrane polymer coated carbamide or alkyd resin class is reacted into membrane polymer coated carbamide.Even if the buried underground of these Plastic Resins above, also need to decompose decades.Therefore, in the synchronous Controlled Release Fertilizer of this lichee special nutritional, 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.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 lichee release and release control 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 lichee is grown up healthy and sound, improves the lichee speed of growth.
For solving above technical problem, the present invention by the following technical solutions:
A kind of lichee release and release control fertilizer, in units of weight part, comprises following raw material: lapping 60-120 part, fertiliser granulates 200-1200 part;
Described lapping, in units of weight part, comprises following raw material: fatty 50-100 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: urea 50-270 part, potassiumphosphate 50-250 part, potassium sulfate 30-200 part, calcium chloride 12-60 part, magnesium borate 10-58 part, zinc nitrate 2-8 part, ferric sulfate 2-8 part, manganous sulfate 2-8 part, copper sulfate 2-8 part, yellow humic acid 30-300 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 lichee release and release control fertilizer, in units of weight part, comprises following raw material: lapping 80-100 part, fertiliser granulates 300-1000 part.
Preferably, described fat to carry out processing and fabricating by greasyfoot.
The present invention also provides a kind of preparation method of lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 lichee release and release control fertilizer with after lapping parcel.
Preferably, the water yield added in step S1 is 650-4500 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, fertiliser granulates is balanced in nutrition, effectively can reduce the turnover rate of fertilizer, improves the utilising efficiency of fertilizer, promote that lichee is grown up healthy and sound, lichee mean yield volume increase 11.6%-12.8% lichee sugar content increases 0.32%-0.39%;
(2) lapping increases the element such as nitrogen, phosphorus, potassium, calcium, boron, iron, zinc, manganese, copper needed for lichee growth, controlled release fertilizer in early stage can be avoided not enough, affect the shortcoming of lichee growth;
(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.
[embodiment]
Be specifically described below in conjunction with specific embodiment.
Embodiment 1
A kind of lichee release and release control fertilizer, in units of weight part, comprises following raw material: lapping 60 parts, fertiliser granulates 1200 parts;
Described lapping, in units of weight part, comprises 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 fertiliser granulates, in units of weight part, comprises following raw material: 270 parts, urea, potassiumphosphate 250 parts, potassium sulfate 200 parts, 60 parts, calcium chloride, magnesium borate 58 parts, zinc nitrate 8 parts, 8 parts, ferric sulfate, manganous sulfate 8 parts, 8 parts, copper sulfate, yellow humic acid 300 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 lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 7%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain lichee release and release control fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 2
A kind of lichee release and release control fertilizer, is characterised in that, in units of weight part, comprises following raw material: lapping 120 parts, fertiliser granulates 200 parts;
Described lapping is in units of weight part, comprise following raw material: 100 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: 50 parts, urea, potassiumphosphate 50 parts, potassium sulfate 30 parts, 12 parts, calcium chloride, magnesium borate 10 parts, zinc nitrate 2 parts, 2 parts, ferric sulfate, manganous sulfate 2 parts, 2 parts, copper sulfate, 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 lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 6%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain lichee release and release control fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 3
A kind of lichee release and release control fertilizer, is characterised in that, in units of weight part, comprises following raw material: lapping 90 parts, fertiliser granulates 700 parts;
Described lapping is in units of weight part, comprise following raw material: lipase 37 5 parts, 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 fat carries out processing and fabricating by greasyfoot and forms;
Described fertiliser granulates, in units of weight part, comprises following raw material: 150 parts, urea, potassiumphosphate 150 parts, potassium sulfate 115 parts, 36 parts, calcium chloride, magnesium borate 34 parts, zinc nitrate 5 parts, 5 parts, ferric sulfate, manganous sulfate 5 parts, 5 parts, copper sulfate, yellow humic acid 175 parts, polyacrylamide 5 parts, polyacrylic acid potassium 5 parts, wilkinite 3 parts, 2 parts, diatomite, urethane 3 parts, methylene-bis naphthalene sulfonic acid potassium 2 parts.
The preparation method of described lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 lichee release and release control fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 4
A kind of lichee release and release control fertilizer, in units of weight part, comprises following raw material: lapping 80 parts, fertiliser granulates 1000 parts.
Described lapping, in units of weight part, comprises 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 fertiliser granulates, in units of weight part, comprises following raw material: 245 parts, urea, potassiumphosphate 200 parts, potassium sulfate 150 parts, 46 parts, calcium chloride, magnesium borate 40 parts, zinc nitrate 6 parts, 6 parts, ferric sulfate, manganous sulfate 6 parts, 6 parts, copper sulfate, yellow humic acid 270 parts, polyacrylamide 2-6 part, polyacrylic acid potassium 5 parts, wilkinite 5 parts, 3 parts, diatomite, urethane 4 parts, methylene-bis naphthalene sulfonic acid potassium 3 parts.
The preparation method of described lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, yellow humic acid, polyacrylamide, polyacrylic acid potassium, wilkinite, diatomite, urethane, methylene-bis naphthalene sulfonic acid potassium are mixed and adds 4000 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 lichee release and release control fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
Embodiment 5
A kind of lichee release and release control fertilizer, in units of weight part, comprises following raw material: lapping 100 parts, fertiliser granulates 300 parts.
Described lapping, in units of weight part, comprises following raw material: 85 parts, fat, 5 parts, bicarbonate of ammonia, 5 parts, calcium phosphate, 3 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: 55 parts, urea, potassiumphosphate 60 parts, potassium sulfate 50 parts, 34 parts, calcium chloride, magnesium borate 20 parts, zinc nitrate 4 parts, 4 parts, ferric sulfate, manganous sulfate 4 parts, 4 parts, copper sulfate, yellow humic acid 50 parts, polyacrylamide 3 parts, polyacrylic acid potassium 3 parts, wilkinite 3 parts, 2 parts, diatomite, urethane 2 parts, methylene-bis naphthalene sulfonic acid potassium 2 parts.
The preparation method of described lichee release and release control fertilizer, comprises the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 5%, is cooled to 25-30 DEG C of i.e. obtained fertiliser granulates;
S2: namely obtain lichee release and release control fertilizer after lapping is wrapped up surface by fertiliser granulates packing machine obtained for step S1.
For verifying the effect of lichee release and release control fertilizer of the present invention, by following experimental verification.
(1) the result of extraction experiment of Wrapped fertilizer
Lichee release and release control 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 lichee release and release control fertilizer prepared by embodiment 1,2,3 is higher, and the fertilizer of major part encapsulating continues to disengage later.
(2) lichee fertilization effect experiment
Experiment 1: the present inventor entrusts Nanning to plant lichee company, with lichee release and release control fertilizer prepared by embodiment 1, manurial experiment is carried out to lichee, only use once every year, simultaneously with embodiment 1 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is than the lichee mean yield volume increase 11.6% of control group, and lichee sugar content increases by 0.32%.
Experiment 2: the present inventor entrusts Yulin City of Guangxi Zhuang Autonomous to plant lichee company, with lichee release and release control fertilizer prepared by embodiment 2, manurial experiment is carried out to lichee, only use once every year, simultaneously with embodiment 2 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is than the lichee mean yield volume increase 12.8% of control group, and lichee sugar content increases by 0.39%.
Experiment 3: the present inventor entrusts City: A Case Study in Baise to plant lichee company, with lichee release and release control fertilizer prepared by embodiment 3, manurial experiment is carried out to lichee, only use once every year, simultaneously with embodiment 3 prepare without Wrapped fertilizer for contrasting, other planting conditions are identical, plant after 1 year, experimental group is than the lichee mean yield volume increase 12.1% of control group, and lichee sugar content increases by 0.36%.
Comprehensive above experiment 1,2,3 known, lichee mean yield volume increase 11.6%-12.8%, lichee sugar content increases 0.32%-0.39%, visible lichee release and release control 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 lichee is grown up healthy and sound, improve Yield of Litchi and sugar degree.
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 lichee release and release control fertilizer, is characterized in that, in units of weight part, comprises following raw material: lapping 60-120 part, fertiliser granulates 200-1200 part;
Described lapping, in units of weight part, comprises following raw material: fatty 50-100 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: urea 50-270 part, potassiumphosphate 50-250 part, potassium sulfate 30-200 part, calcium chloride 12-60 part, magnesium borate 10-58 part, zinc nitrate 2-8 part, ferric sulfate 2-8 part, manganous sulfate 2-8 part, copper sulfate 2-8 part, yellow humic acid 30-300 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. lichee release and release control fertilizer according to claim 1, is characterized in that, in units of weight part, comprises following raw material: lapping 80-100 part, fertiliser granulates 300-1000 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 lichee release and release control fertilizer according to any one of claim 1-3, is characterized in that, comprise the following steps:
S1: urea, potassiumphosphate, potassium sulfate, calcium chloride, magnesium borate, zinc nitrate, ferric sulfate, manganous sulfate, copper sulfate, 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 lichee release and release control fertilizer with after lapping parcel.
5. the preparation method of lichee release and release control fertilizer according to claim 4, is characterized in that, the water yield added in step S1 is 650-4500 part.
6. the preparation method of lichee release and release control 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 lichee release and release control 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 lichee release and release control 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 |
|---|---|---|---|---|
| CN105367241A (en) * | 2015-11-26 | 2016-03-02 | 南宁市金沙壮畜牧养殖有限责任公司 | Special controlled release fertilizer for mangoes and preparation method for fertilizer |
| CN108046885A (en) * | 2017-11-20 | 2018-05-18 | 烟台市烟农富邦肥料科技有限公司 | A kind of manufacturing method of rounded grain zinc boron potassic fertilizer |
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| CN1834069A (en) * | 2006-03-31 | 2006-09-20 | 郑升杰 | Coated fertilizer for fruit trees and mfg. method |
| CN102584437A (en) * | 2012-02-08 | 2012-07-18 | 叶长东 | Sugarcane controlled-release fertilizer and preparation process thereof |
| CN102584478A (en) * | 2012-03-29 | 2012-07-18 | 叶长东 | Banana controlled-release fertilizer and preparation technology |
| CN102875262A (en) * | 2012-10-31 | 2013-01-16 | 海洋石油富岛有限公司 | Synchronous nutrition controlled-release fertilizer specially used for litchis |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0867422A2 (en) * | 1997-03-26 | 1998-09-30 | Central Glass Company, Limited | Coated granular fertilizer and method for producing same |
| CN1834069A (en) * | 2006-03-31 | 2006-09-20 | 郑升杰 | Coated fertilizer for fruit trees and mfg. method |
| CN102584437A (en) * | 2012-02-08 | 2012-07-18 | 叶长东 | Sugarcane controlled-release fertilizer and preparation process thereof |
| CN102584478A (en) * | 2012-03-29 | 2012-07-18 | 叶长东 | Banana controlled-release fertilizer and preparation technology |
| CN102875262A (en) * | 2012-10-31 | 2013-01-16 | 海洋石油富岛有限公司 | Synchronous nutrition controlled-release fertilizer specially used for litchis |
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| CN108046885A (en) * | 2017-11-20 | 2018-05-18 | 烟台市烟农富邦肥料科技有限公司 | A kind of manufacturing method of rounded grain zinc boron potassic fertilizer |
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Application publication date: 20151125 |