CN203482610U - Preparation system of liquid formula fertilizer - Google Patents
Preparation system of liquid formula fertilizer Download PDFInfo
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- CN203482610U CN203482610U CN201320551604.6U CN201320551604U CN203482610U CN 203482610 U CN203482610 U CN 203482610U CN 201320551604 U CN201320551604 U CN 201320551604U CN 203482610 U CN203482610 U CN 203482610U
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- magnetic valve
- head tank
- measuring pump
- fertilizer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
The utility model relates to a preparation system of a liquid formula fertilizer. The system comprises a flowmeter, a raw material tank, a stirrer, a liquidometer, a filter, a metering pump, a mixing barrel, an electromagnetic valve, a fertilizer injector, a one-way valve and a programmable controller, wherein an irrigation pipeline is connected with the raw material tank through the electromagnetic valve and the liquidometer, the raw material tank is connected to the mixing barrel through the electromagnetic valve, the filter and the metering pump, the mixing barrel is connected to the irrigation pipeline through the fertilizer injector and the one-way valve, and the flowmeter, the metering pump, the stirrer, the liquidometer, the electromagnetic valve and the fertilizer injector are electrically connected to the programmable controller, respectively. The system has the advantages of automatically operating, saving the labor cost and the fertilizer, improving the utilization ratio of the fertilizer, preventing soil pollution, improving the product yield and quality and the like.
Description
Technical field
The utility model relates to a kind of formula Liquid Fertilizer compounding system, belongs to agricultural water fertilizer integrated technique field, particularly the preparation of the applicable required formula liquid fertilizer of Agricultural Park crop.
Background technology
Owing to having, producing cost is low, nutrient content is high, it is compound to be easy to for liquid fertilizer, can be directly by crops, absorbed, be convenient to the plurality of advantages such as rational application of fertilizers (balance fertilizing) and mechanized application, is more and more subject to the common concern of various countries.
Although there being some producers to adopt some chemical industry methods to produce aspect liquid fertilizer production, because cost of transportation is higher, do not realize spread and use.And on applying, remain blank on agricultural facility.In order to facilitate the large-area applications of liquid fertilizer, reduce liquid fertilizer and use cost, and help the popularization of rational application of fertilizers technology, be necessary that utility model is a kind of simply, the Liquid Fertilizer compounding system of filling a prescription efficiently, cheaply, directly apply to Modern Agricultural Park or large area crop growing spots, to save labour cost, improve the utilization ratio of fertilizer, and avoid fertilizer waste and soil pollution.
Utility model content
For above-mentioned prior art, the technical problems to be solved in the utility model be to provide a kind of can be according to the crop regulation of fertilizer requirement of each breeding time, by different fertilizer solution is measured, is mixed, make compounding system and the compound method of the formula liquid fertilizer that meets the fertile characteristic of crop need by different proportion.
For solving the problems of the technologies described above, the utility model provides a kind of formula Liquid Fertilizer compounding system, comprise flowmeter, head tank, agitator, liquid level gauge, filter, measuring pump, tempering tank, magnetic valve, note fertile machine, check valve and Programmable Logic Controller, wherein the entrance of each head tank is provided with magnetic valve, be built-in with liquid level gauge, bottom is placed with temperature sensor, and agitator is installed, irrigation conduit passes through magnetic valve, flowmeter connects head tank, head tank is through magnetic valve, filter and be connected to tempering tank to measuring pump, tempering tank is by the fertile machine of note, check valve is connected to irrigation conduit, flowmeter described in each, measuring pump, agitator, liquid level gauge, magnetic valve, note fertile machine and be electrically connected to respectively Programmable Logic Controller, the quantity of described head tank is n, n >=2.
As further improvement of the utility model, the technical problem that the utility model further will solve is to provide a kind of configuration-system that the liquid fertilizer of various combination can be provided in batches.
N is preferably 6, irrigation conduit is connected with the first pipeline with the first magnetic valve by flowmeter successively, the first pipeline is connected to the first to the 6th head tank by the second to the 7th magnetic valve respectively, the described first to the 3rd head tank is correspondingly connected with the first measuring pump through the 8th to the tenth magnetic valve and the first to the 3rd filter respectively, the 4th head tank is through the 11 magnetic valve, the 4th filter is connected to respectively the first measuring pump and the second measuring pump, the 5th, the 6th head tank is correspondingly respectively through the 12, the 13 magnetic valve and the 5th, the 6th filter is connected with the second measuring pump, described first, the second measuring pump passes through filter and corresponding first by pipeline respectively, the second tempering tank connects, described first, the second tempering tank is all built-in liquid level gauge, described first, the second tempering tank is respectively by the 14, the 15 magnetic valve is connected with the fertile machine of note, the fertile machine of described note is connected with irrigation conduit by check valve.
In addition, head tank capacity can be according to using scale adjustment, and place different raw materials according to different proportion.
The material of described head tank is PVC, PE or stainless steel.
Described liquid level gauge can communicate with Programmable Logic Controller.Described flow is counted electronic flowmeter or measuring pump.
According to a kind of formula Liquid Fertilizer compound method of said system, it comprises the following steps:
1) formula Liquid Fertilizer compounding system is set, according to the pre-set programs being built in Programmable Logic Controller 51, the parameter transmission by relative set realizes automated system operation;
2) open the first magnetic valve, the order of opening by next magnetic valve of a upper closed electromagnetic valve is opened respectively the second to the 7th magnetic valve, water filling in the to first to the 6th head tank respectively, when the water yield in institute's water filling head tank reaches the numerical value of flowmeter setting, described the first closed electromagnetic valve, stops to water filling in described head tank;
3) to different head tanks, put into respectively the basic water soluble fertilizer of variety classes and quantity, by controlling programmable device control agitator mixing time, fertilizer is fully dissolved, the fertilizer stoste that compound concentration is fixing;
4) by the preset parameters of Programmable Logic Controller, open and close successively respectively the 8th to the 11 magnetic valve and control running time of the first measuring pump, the fertilizer stoste of first to fourth head tank is input in the first tempering tank through first to fourth filter respectively;
5) by the preset parameters of Programmable Logic Controller, open and close successively respectively the 11 to the 13 magnetic valve and control running time of the second measuring pump, the fertilizer stoste in the 4th to the 6th head tank is delivered in the second tempering tank through the 4th to the 6th filter input respectively;
6) according to the preset parameters of Programmable Logic Controller, can complete above-mentioned steps 4), 5) in one or complete simultaneously;
7) above-mentioned steps 4), 5), 6) complete after, by the 7th, the 8th liquid level gauge, judge the liquid level in first, second tempering tank;
8) if the 7th, the 8th liquid level gauge all higher than when setting value, open the 14 magnetic valve and the fertile machine of note, solution in the first tempering tank is injected in irrigation conduit through check valve, in the first tempering tank drop to the minimum liquid level that the 7th liquid level gauge sets time, close the fertile machine of note and the 14 magnetic valve; Open the 15 magnetic valve and the fertile machine of note, the solution in the second tempering tank is injected in irrigation conduit through check valve, when the solution in the second tempering tank drops to the minimum liquid level of the 8th liquid level gauge setting, close the fertile machine of note and the 15 magnetic valve;
9) if the 7th liquid level gauge higher than setting value the 8th liquid level gauge lower than when setting value, directly open the 14 magnetic valve and the fertile machine of note, solution in the first tempering tank is injected in irrigation conduit through check valve, when the solution in the first tempering tank drops to the minimum liquid level of the 7th liquid level gauge setting, close the fertile machine of note and the 14 magnetic valve;
10) if the 7th liquid level gauge lower than setting value the 8th liquid level gauge higher than when setting value, directly open the 15 magnetic valve and the fertile machine of note, solution in the second tempering tank is injected in irrigation conduit through check valve, when the solution in the second tempering tank is dropped to the minimum liquid level of the 8th liquid level gauge setting, close the fertile machine of note and the 15 magnetic valve.
Above-mentioned Programmable Logic Controller is set every control parameter according to the regulation of fertilizer requirement of Different Crop, realizes the Liquid Fertilizer of preparation different formulations.
Above-mentioned Programmable Logic Controller is set every control parameter according to different formula rates, realizes the Liquid Fertilizer of preparation predetermined formulation.
The utility model is owing to adopting technique scheme, and it has the following advantages: 1, cost is low.This system architecture is simple, equipment needed thereby be easy to buying and price lower, construction cost is lower; 2, precision.Owing to adopting pre-set programs essence control system, critical workflow link has realized quantitative work, and the liquid nutrients ratio of generation is accurate; 3, with high content of technology.Producing Liquid Fertilizer not only needs strictly to control the formation of raw material, and needs fully to understand solvability and the characteristic of each raw material, accordingly by PLC control system, Different Nutrients is carried out compound, makes it produce accurate, the pure Liquid Fertilizer of proportioning or nutrient solution; 4, drip irrigation is without obstruction.Through the processing of this system, the liquid fertilizer that produces transparent limpid, without any impurity, it is lighter to drip irrigation system burden, the phenomenon probability that produces water dropper or line clogging is lower, the service life of prolongation droping irrigating pipe; 5, can realize rational application of fertilizers.The Liquid Fertilizer that this device produces can be according to the regulation of fertilizer requirement of Different Crop, at any time, accurate adjustment nutrient formula rate, in conjunction with soil nutrient, detects, and tentatively realizes rational application of fertilizers; 6, save fertilizer, reduce and pollute.Because the liquid fertilizer proportioning producing is accurate, can reduce the waste that nutrient proportioning is single caused, and fertilising as required, reduce the soil pollution causing because of excessive fertilization.7, high efficiency.Use this system and in conjunction with accurate drip irrigation, can significantly improve the availability of fertilizer, and can balanced crop desired nutritional element, crop quality and output improved.And this system realized automation control, save manually, significantly increase work efficiency.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of formula Liquid Fertilizer compounding system of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail to understand better the utility model.
Embodiment 1: when n=6, as shown in Figure 1, the utility model comprises a flowmeter 2, and its one end is connected with irrigation conduit 52 by magnetic valve 1; Flowmeter 2 is connected with magnetic valve 3,4,5,6,7,8 respectively by pipeline; Magnetic valve 3,4,5,6,7,8 is connected with head tank 15,16,17,18,19,20 respectively, is separately installed with agitator 9,10,11,12,13,14 on head tank 15,16,17,18,19,20; The interior liquid level gauge 21,22,23,24,25,26 of placing respectively of head tank 15,16,17,18,19,20; Head tank 15,16,17 is connected with measuring pump 41 by filter 33,34,35 respectively; Head tank 17 is connected with measuring pump 42 with measuring pump 41 respectively through filter 36; Head tank 19,20 is connected with measuring pump 42 through filter 37,38 respectively; Measuring pump 41 is connected by pipeline with tempering tank 43, and filter 39 is installed in the middle of it; Measuring pump 42 is connected by pipeline with tempering tank 44, and filter 40 is installed in the middle of it; Tempering tank 43,44 is connected with the fertile machine 49 of note respectively by magnetic valve; Noting fertile machine 49 is connected with irrigation conduit 52 by check valve 50; This example arranges a set of control system, it includes Programmable Logic Controller 51, be electrically connected to respectively with flowmeter, measuring pump, agitator, liquid level gauge, magnetic valve, the fertile machine of note described in each, Programmable Logic Controller 51 is controlled the operation of each several part by preset programmed instruction.
This example Central Plains batch can quantity is 6, also the head tank of varying number can be set according to the difference of formula.
The capacity of head tank can be according to using scale adjustment, and head tank material is PVC, PE or stainless steel, wherein places different types of basic water soluble fertilizer; Basis water soluble fertilizer carries out stirring and dissolving by the agitator being arranged on head tank.
The utility model is controlled whole system by Programmable Logic Controller 51 and is moved, and whole process comprises the following steps:
1) formula Liquid Fertilizer compounding system is set, according to the pre-set programs being built in Programmable Logic Controller 51, the parameter transmission by relative set realizes automated system operation.
2) open magnetic valve 1, the order of opening by next magnetic valve of a upper closed electromagnetic valve is opens solenoid valve 3,4,5,6,7,8 respectively, respectively to water filling in head tank 15,16,17,18,19,20, when the water yield in institute's water filling head tank reaches the numerical value of flowmeter setting, described closed electromagnetic valve, stops to water filling in described head tank;
3) to different head tanks, put into respectively the basic water soluble fertilizer of variety classes and quantity, by controlling programmable device control agitator mixing time, fertilizer is fully dissolved, the fertilizer stoste that compound concentration is fixing;
4) by the preset parameters of Programmable Logic Controller, open and close successively respectively magnetic valve 27,28,29,30 and control running time of measuring pump 41, the fertilizer stoste in head tank 15,16,17,18 is input in tempering tank 43 through filter 33,34,35,36 respectively;
5) by the preset parameters of Programmable Logic Controller, open and close successively respectively magnetic valve 30,31,32 and control running time of measuring pump 42, by the fertilizer stoste in 18,19,20 in head tank, through filter, 36,37,38 inputs are delivered in tempering tank 44 respectively.
6) according to the preset parameters of Programmable Logic Controller, can realize above-mentioned steps 4), 5) in one or complete simultaneously;
7) above-mentioned steps 4), 5), 6) complete after, by the liquid level in liquid level gauge 45,46 judgement tempering tanks 43,44;
8) if liquid level gauge 45,46 all higher than when setting value, opens solenoid valve 47 and the fertile machine 49 of note, solution in tempering tank 43 is injected in irrigation conduit 52 through check valve 50, when the solution in tempering tank 43 drops to the minimum liquid level of liquid level gauge 45 settings, closes the fertile machine 49 of note and magnetic valve 47; Opens solenoid valve 48 and the fertile machine 49 of note, be injected into the solution in tempering tank 44 in irrigation conduit 52 through check valve 50, when the solution in tempering tank 44 drops to the minimum liquid level of liquid level gauge 46 settings, closes the fertile machine 49 of note and magnetic valve 48;
9) if liquid level gauge 45 higher than setting value liquid level gauge 46 lower than when setting value, direct opens solenoid valve 47 and the fertile machine 49 of note, solution in tempering tank 43 is injected in irrigation conduit 52 through check valve 50, when the solution in tempering tank 43 drops to the minimum liquid level of liquid level gauge 45 settings, close the fertile machine 49 of note and magnetic valve 47;
10) if liquid level gauge 45 lower than setting value liquid level gauge 46 higher than when setting value, direct opens solenoid valve 48 and the fertile machine 49 of note, solution in tempering tank 44 is injected in irrigation conduit 52 through check valve 50, when the solution in tempering tank 44 drops to the minimum liquid level of liquid level gauge 46 settings, close the fertile machine 49 of note and magnetic valve 48; System finishing operation.
Embodiment 2: adopting the utility model method is 660m to cultivated area
2greenhouse by solar heat in the tomato of the vegetative growth phase Liquid Fertilizer of filling a prescription prepare and use.
Rule of thumb, in greenhouse by solar heat tomato to nitrogen (N), phosphorus (P
2o
5), potassium (K
2o), the demand percentage of calcium (CaO), magnesium (MgO) is approximately 1.5:0.3:1.2:1.2:0.2.
This system is prepared and is used according to the fertile ratio of the above-mentioned need Liquid Fertilizer of filling a prescription, and formulated for administered step is as follows:
1) the fertile ratio of need is input in Programmable Logic Controller 51 to predetermined system operating instruction and program;
2) different types of basic water soluble fertilizer is quantitatively put into head tank according to its solvability, being specially nitrogenous fertilizer 200kg puts in head tank 15, phosphate fertilizer 200Kg puts in head tank 16, potash fertilizer 60kg puts in head tank 17, additive 1kg puts in head tank 18, calcareous fertilisers 200kg puts in head tank 19, and fertiliser containing magnesium 100kg puts in head tank 20;
3) by Programmable Logic Controller 51 pre-set programs, open system, magnetic valve 1 is opened; Magnetic valve 3 is opened to water filling in head tank 15, opens agitator 9 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 3 cuts out.Magnetic valve 4 is opened to water filling in head tank 16, opens agitator 10 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 4 cuts out.Magnetic valve 5 is opened to water filling in head tank 17, opens agitator 12 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 5 cuts out.Magnetic valve 6 is opened to water filling in head tank 18, opens agitator 24 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 6 cuts out.Magnetic valve 7 is opened to water filling in head tank 19, opens agitator 13 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 7 cuts out.Magnetic valve 8 is opened to water filling in head tank 20, opens agitator 14 simultaneously, and the water yield reaches flowmeter 2 preset value 0.2m
2time, magnetic valve 8 cuts out, and water filling is complete.
4) when Raw material pail 15,16,17,18,19,20 liquid level in any is during lower than preset value, the liquid level gauge in this Raw material pail passes to Programmable Logic Controller by signal, and sends low liquid level warning;
5) measuring pump variable being set is 60L/H, and magnetic valve 27 is opened, and measuring pump 41 brings into operation; 3 minutes rear electromagnetic valves 28 of measuring pump 41 operation are opened, and magnetic valve 27 cuts out; 3 minutes rear electromagnetic valves 29 of measuring pump 41 operation are opened, and magnetic valve 28 cuts out; 20 minutes rear electromagnetic valves 30 of measuring pump 41 operation are opened, and magnetic valve 29 cuts out, and measuring pump 41 operations are out of service after 4 minutes, and magnetic valve 30 cuts out;
6) magnetic valve 31 is opened, and measuring pump 42 brings into operation; 20 minutes rear electromagnetic valves 32 of measuring pump 42 operation are opened, and magnetic valve 31 cuts out; 8 minutes rear electromagnetic valves 30 of measuring pump 42 operation are opened, and magnetic valve 32 cuts out; Measuring pump 42 operations are out of service after 2 minutes, and magnetic valve 30 cuts out.
7) magnetic valve 47 is opened, and notes fertile machine 49 and brings into operation, and the liquid level in tempering tank 43 during lower than liquid level gauge 45 preset value, is noted fertile machine 49 out of service, and magnetic valve 47 cuts out; Behind 5 minutes, interval, magnetic valve 48 is opened, and notes fertile machine 49 and brings into operation, and the liquid level in tempering tank 44 during lower than liquid level gauge 46 preset value, is noted fertile machine 49 out of service, and magnetic valve 48 cuts out;
8) system is out of service, and Tomato in Greenhouse formula Liquid Fertilizer is prepared and use complete.
Compare with traditional fertilization mode, the Liquid Fertilizer of filling a prescription on tomato is used, and can improve utilization rate of fertilizer more than 30%, has avoided fertilizer waste; Meanwhile, the yield and quality of tomato has raising by a relatively large margin, and fruit is mellow and full, and color and luster is even, excellent taste; And dropper line clogging phenomenon significantly reduces.
The various embodiments described above are only applicable to illustrate the utility model, difference due to soil, crop, the initial nutrient content of soil, weather and control measures, difference, should carry out the analysis of each factor before practical application to some extent, makes best Liquid Fertilizer and joins the scheme of executing.
The various embodiments described above are only for illustrating the utility model; wherein in system, the quantity of the structure of each parts, teaming method, the method for operation, each unit and size and flow process etc. are all to change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should be within protection domain of the present utility model.
Claims (6)
1. a formula Liquid Fertilizer compounding system, comprise flowmeter, head tank, agitator, liquid level gauge, filter, measuring pump, tempering tank, magnetic valve, note fertile machine, check valve and Programmable Logic Controller, wherein the entrance of each head tank is provided with magnetic valve, be built-in with liquid level gauge, bottom is placed with temperature sensor, and agitator is installed, irrigation conduit passes through magnetic valve, flowmeter connects head tank, head tank is through magnetic valve, filter and be connected to tempering tank to measuring pump, tempering tank is by the fertile machine of note, check valve is connected to irrigation conduit, flowmeter described in each, measuring pump, agitator, liquid level gauge, magnetic valve, note fertile machine and be electrically connected to respectively Programmable Logic Controller, it is characterized in that: the quantity of described head tank is n, n >=2.
2. formula Liquid Fertilizer compounding system according to claim 1, it is characterized in that: n is 6, irrigation conduit (52) is connected with the first pipeline (53) with the first magnetic valve (2) by flowmeter (1) successively, the first pipeline (53) is respectively by the second to the 7th magnetic valve (3, 4, 5, 6, 7, 8) be connected to the first to the 6th head tank (15, 16, 17, 18, 19, 20), the described first to the 3rd head tank (15, 16, 17) correspondingly respectively through the 8th to the tenth magnetic valve (27, 28, 29) and the first to the 3rd filter (33, 34, 35) be connected with the first measuring pump (41), the 4th head tank (18) is through the 11 magnetic valve (30), the 4th filter (36) is connected to respectively the first measuring pump (41) and the second measuring pump (42), the 5th, the 6th head tank (19, 20) correspondingly respectively through the 12, the 13 magnetic valve (31, 32) and the 5th, the 6th filter (37, 38) be connected with the second measuring pump (42), described first, the second measuring pump (41, 42) by pipeline, pass through filter and corresponding first respectively, the second tempering tank (43, 44) connect, described first, the second tempering tank (43, 44) all built-in liquid level gauge (45, 46), described first, the second tempering tank (43, 44) respectively by the 14, the 15 magnetic valve (47, 48) be connected with the fertile machine of note (49), the fertile machine of described note (49) is connected with irrigation conduit (52) by check valve (50).
3. formula Liquid Fertilizer compounding system according to claim 2, is characterized in that the capacity of described head tank can be according to using scale adjustment, and places different raw materials according to different proportion.
4. formula Liquid Fertilizer compounding system according to claim 2, the material that it is characterized in that described head tank is PVC, PE or stainless steel.
5. formula Liquid Fertilizer compounding system according to claim 2, is characterized in that liquid level gauge can communicate with Programmable Logic Controller.
6. formula Liquid Fertilizer compounding system according to claim 2, is characterized in that described flow counts electronic flowmeter or measuring pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551604.6U CN203482610U (en) | 2013-09-05 | 2013-09-05 | Preparation system of liquid formula fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320551604.6U CN203482610U (en) | 2013-09-05 | 2013-09-05 | Preparation system of liquid formula fertilizer |
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| CN203482610U true CN203482610U (en) | 2014-03-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103621235A (en) * | 2013-09-05 | 2014-03-12 | 北京中农天陆微纳米气泡水科技有限公司 | Preparation system and method for formula liquid fertilizer |
| CN106831035A (en) * | 2015-11-23 | 2017-06-13 | 云南云天化农业科技股份有限公司 | A kind of liquid fertilizer preparation method, equipment and system |
| CN111374035A (en) * | 2018-12-29 | 2020-07-07 | 北京绿里生态科技有限公司 | Nutrient solution tank integrated cultivation system and nutrient solution class ratio detection method |
-
2013
- 2013-09-05 CN CN201320551604.6U patent/CN203482610U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103621235A (en) * | 2013-09-05 | 2014-03-12 | 北京中农天陆微纳米气泡水科技有限公司 | Preparation system and method for formula liquid fertilizer |
| CN106831035A (en) * | 2015-11-23 | 2017-06-13 | 云南云天化农业科技股份有限公司 | A kind of liquid fertilizer preparation method, equipment and system |
| CN111374035A (en) * | 2018-12-29 | 2020-07-07 | 北京绿里生态科技有限公司 | Nutrient solution tank integrated cultivation system and nutrient solution class ratio detection method |
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