CN206790979U - A kind of superior fertilizer irrigation system of crops based on PLC controls - Google Patents
A kind of superior fertilizer irrigation system of crops based on PLC controls Download PDFInfo
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- CN206790979U CN206790979U CN201720201118.XU CN201720201118U CN206790979U CN 206790979 U CN206790979 U CN 206790979U CN 201720201118 U CN201720201118 U CN 201720201118U CN 206790979 U CN206790979 U CN 206790979U
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Abstract
The utility model discloses a kind of superior fertilizer irrigation system of crops based on PLC controls, including PC, PLC, Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC upper end is connected with PC, and described PC is as host computer, the information of the superior fertilizer irrigation of crops for inputting PC controls；Described PLC left end is connected with Ph sensors, ion sensing electrode device respectively；Described PLC right-hand member is connected with ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus respectively, and ion electrode detecting system is provided with described ion electrode control cabinet；Fertilising valve, fertilizing pump are installed on described pump valve control cabinet, complete the superior fertilizer irrigation of crops.The utility model realizes the precision irrigation and the fertilising Automated condtrol of intelligence of crops liquid manure, saves manpower, improves production efficiency, can produce good economic benefit and social benefit.
Description
Technical field
It the utility model is related to computer technology, sensing technology, the administrative skill of Computerized intelligent, and in particular to farming
The technical field for the control system that thing water-fertilizer precision is irrigated, in particular, it is superior to be related to a kind of crops based on PLC controls
Fertilizer irrigation system.
Background technology
Domestic irrigation control only accounts for the supply of the water demand of crop, and the consideration simultaneously of water, fertilizer is few, without maturation
The expanded application of water-fertilizer precision control device, both at home and abroad existing liquid manure control are total according to fertilizer ratio, fertilization time, fertilising
Amount controls, also the macro-control to the whole conductivity EC of irrigation water, can not independent measurement single nutrient density, it is and existing
Nutrient measuring instrument can not realize online measurement in real time, also enter without for irrigating solution nitrogen, phosphorus, potassium microelement concentration
Go and is individually emerged with the integrated relevant device controlled, and do not have pin also both at home and abroad to necessarily in irrigation system intellectual development
Sexual system research pipe network is intelligently laid, liquid manure flow is controlled in an optimal manner, saves financial cost, is irrigated to tackle digitlization
The arrival in epoch.
Irrigation is to make up the deficiency of natural precipitation quantitatively timely and appropriately to meet lawn with the inequality on space-time, guarantee
The important measures of moisture needed for growth.Conventional lawn greening engineering, much without well-equipped irrigation system, when pouring water only
Broad irrigation or artificial watering can be used.Not only cause the waste of water, and often due to can not pour water in time, it is excessive pour water or
Insufficient irrigation, it is difficult to the Controlled irrigation uniformity, harmful effect is produced to the normal growth on lawn.With the continuous hair of city-building
Exhibition, urban population largely concentrates, and industry and domestic water increase sharply, travel, lie fallow, sports ground and residential area etc. it is various green
Ground area is increasing, and the pressure of urban water supply becomes increasingly conspicuous.Traditional ground broad irrigation can not meet modern grass
The requirement that level ground is irrigated, it is imperative using efficient irrigation method.
Data shows according to the study：Every kind of plant has the humidity of its suitable growth, and humidity is excessive, and the root system of plant will be
Soil rot, humidity is too small, the moisture being just insufficient for required for plant growth.Irrigation is exactly to meet soil to greatest extent
The humidity of earth is within the humidity range that suitable for plant grows.Humidity through data verification optimum lawn growth is 50%-
60%RH.
Water is irreplaceable fundamental during all life, and water resource is the important of national economy and social development
Basic resource.China is one of 13 Ge Pin lands that abounds in rivers and lakes in the world, 2300 cubic metres of water resources ownership per capita, the only world water per capita
Flat 1/4, occupy the 109th, the world.And spatial and temporal distributions are very uneven, Nan Duobei is few, and Dong Duoxi is few；Summer and autumn are more, and Winter-Spring is few；
The North China, northwest, the water resources quantity of the Northeast for accounting for area more than 50% only account for 20% or so of national total amount.In recent years
Come, as population increases, economic development and the raising of the level of urbanization, the contradiction of supply and demand for the water resource are becoming increasingly acute, agricultural arid lacks
Water and shortage of water resources have turned into the important restriction factor of China's economy and social development, and exacerbate the evil of ecological environment
Change.Tale quale water consumption statistics, the wherein medium billion cubic meter of dry year water shortage 358 in the whole nation, 30,000,000,000 cubes of agricultural irrigation water shortage
Rice.Since the 1990s, agricultural average annual area suffered from drought in China's has up to more than 20,000,000 hectares in national more than 660 individual cities
Water crisis occurs in more than half, becomes increasingly conspicuous the problem of northern Cut off, and water shortage has spread to southern many from the north
Area.Because surface water resources deficiency causes groundwater mining, national areas property Trend of Groundwater Descent Funnel area is up to 8.2 ten thousand squares
Kilometer.The agricultural water proportion of developed country is generally 50% of total water consumption or so.At present, China's agricultural water proportion from
88% in 1980 drops to current 70% or so, also may proceed to decline from now on, the situation of agricultural arid water shortage is irreversible.
Northern area water resource economics are very high, and the potentiality increased income are little.There is some potentialities to be exploited in south, but mainly
Concentrate on southwest.
China's agricultural irrigation water amount is big, and irrigation efficiency is low and generally existing the problem of water waste.The whole nation fills at present
It is about 43% to irrigate water use efficiency, and folk prescription water grain-production rate only has 10 kilograms or so, is significantly less than developed country's irrigation water and uses
Rate 70-80%, more than 2.0 kilograms of folk prescription water grain-production rate level.By using modern water-saving irrigation technological transformation tradition
Irrigation farming, " fine to irrigate " of timely and appropriate discovery is realized, is had important practical significance and far-reaching historic significance.It is irrigating
System reasonably promotes Automated condtrol, can not only improve resource utilization, alleviates the contradiction being becoming tight water resource day, can be with
Increase the yield of crops, reduce the cost of agricultural product.
China is water shortage country, and agricultural is again to use water rich and influential family, therefore China advocates water-saving agriculture, is this Rational Irrigation and filling
The important measures of China's agricultural sustainable development will be turned into by irrigating fertilising.It is China's chemical fertilizer to coordinate agricultural policy and agricultural technology development
The new highlight of industrial fertilizer production.
At present, there is problems with the control system of water and fertilizer irrigation：
(1), domestic irrigation control only accounts for the supply of the water demand of crop, and water, fertilizer consider simultaneously it is few, not into
The ripe expanded application of water-fertilizer precision control device；
(2), seldom using PLC as control system, efficiency is low, wastes time and energy；
(3), the control system of current water and fertilizer irrigation does not include PC, PLC, Ph sensors, ion electrode biography
Sensor, ion electrode control cabinet, pump valve control cabinet, its is complicated.
The content of the invention
The utility model is to overcome above-mentioned deficiency, gives a kind of superior fertilising of the crops based on PLC controls and fills
Irrigate system.
Technical scheme is as follows：
It is a kind of based on PLC control the superior fertilizer irrigation system of crops, including PC, PLC, Ph sensors,
Ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC uses S7-200
PLC, as it is a kind of based on PLC control the superior fertilizer irrigation system of crops slave computer, described PLC control
Device upper end is connected with PC, and described PC is as host computer, for inputting the superior fertilizer irrigation of crops of PC controls
The process of the superior fertilizer irrigation of crops of information and real-time display PLC controls；Described PLC left end passes with Ph respectively
Sensor, ion sensing electrode device are connected；Described PLC right-hand member respectively with ion electrode control cabinet, pump valve control cabinet,
Fertilizer apparatus is connected, and ion electrode detecting system is provided with described ion electrode control cabinet；Described pump valve control cabinet
On fertilising valve, fertilizing pump are installed, complete the superior fertilizer irrigation of crops.
Further, described fertilizer apparatus includes venturi type fertilizer applicator, filter, fertilising pipe irrigation main pipeline, fertilizer
Charging basket.
Further, described Ph sensors, at fertilising pipe irrigation main pipeline, fertilizer bucket.
Further, described ion sensing electrode device, in ion electrode detecting system.
Further, described ion electrode detecting system include reference electrode, ion-selective electrode, liquid manure solution, from
Subsignal output circuit device, flow cell, electrochemical sensor.
The function of ion electrode detecting system：
First, co-implanted liquid manure solution forms a flow cell in reference electrode and ion-selective electrode；
Secondly, the concentration of ion is measured by measuring the electromotive force of flow cell；
Finally, the electrochemical sensor that the concentration of effects of ion is determined using membrane potential measures sensitive membrane and the phase of solution
The membrane potential directly relevant with ionic activity is produced on interface, measures the electromotive force of ion electrode, completes the ion of liquid manure solution
The irrigation of fertilizer.
Further, described fertilising valve, installed in the upper end of venturi type fertilizer applicator.
Further, described fertilizing pump, the junction of main pipeline is irrigated installed in fertilizer bucket and fertilising pipe.
The present utility model compared with prior art, has advantages below and high-lighting effect：
(1) a kind of, superior fertilizer irrigation system of crops based on PLC controls that the present invention uses, including PC, PLC
Controller, Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC controls
Device processed uses S7-200 PLC, as a kind of bottom of the superior fertilizer irrigation system of crops based on PLC controls
Machine, described PLC upper end are connected with PC, and described PC is as host computer, for inputting the farming of PC controls
The process of the superior fertilizer irrigation of crops of information and real-time display the PLC control of the superior fertilizer irrigation of thing；Described PLC controls
Device left end is connected with Ph sensors, ion sensing electrode device respectively；Described PLC right-hand member respectively with ion electrode control
Case processed, pump valve control cabinet, fertilizer apparatus are connected, and ion electrode detecting system is provided with described ion electrode control cabinet；
Fertilising valve, fertilizing pump are installed on described pump valve control cabinet, complete the superior fertilizer irrigation of crops；
(2), the fertilizer apparatus that the present invention uses includes venturi type fertilizer applicator, filter, fertilising pipe irrigation main pipeline, fertilizer
Charging basket；Described Ph sensors, at fertilising pipe irrigation main pipeline, fertilizer bucket；Described ion sensing electrode device, installation
In ion electrode detecting system；
(3), the ion electrode detecting system that uses of the present invention include reference electrode, ion-selective electrode, liquid manure solution, from
Subsignal output circuit device, flow cell, electrochemical sensor；
(4), the fertilising valve that the present invention uses, installed in the upper end of venturi type fertilizer applicator；Described fertilizing pump, is arranged on
Fertilizer bucket and fertilising pipe irrigate the junction of main pipeline.
Except the above, it is of the invention most obvious compared with the superior fertilizer irrigation system of other crops the characteristics of be：
(1), the function of ion electrode detecting system：
First, co-implanted liquid manure solution forms a flow cell in reference electrode and ion-selective electrode；
Secondly, the concentration of ion is measured by measuring the electromotive force of flow cell；
Finally, the electrochemical sensor that the concentration of effects of ion is determined using membrane potential measures sensitive membrane and the phase of solution
The membrane potential directly relevant with ionic activity is produced on interface, measures the electromotive force of ion electrode, completes the ion of liquid manure solution
The irrigation of fertilizer.
(2), the present invention realizes the precision irrigation and the fertilising Automated condtrol of intelligence of crops liquid manure, saves manpower,
Production efficiency is improved, good economic benefit and social benefit can be produced.
Further advantage, target and feature of the present utility model will be explained in the following description to a certain extent
State, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or
Person can be instructed from practice of the present utility model.Target and further advantage of the present utility model can be said by following
Bright book and claims are realized and obtained.
Brief description of the drawings
Fig. 1 is that a kind of structure of superior fertilizer irrigation system of crops based on PLC controls of the present utility model is shown
It is intended to；
Fig. 2 is that a kind of hot emerging system of liquid manure gas of the superior irrigation of crops of the present utility model realizes warmhouse booth
In crops liquid manure gas heat fusion precision irrigation with intelligence fertilising Automated condtrol process flow chart.
Embodiment
Embodiment
In order that those skilled in the art will better understand the technical solution of the present invention, and make the present invention above-mentioned mesh
, feature and advantage can be more obvious understandable, below in conjunction with the accompanying drawings to the present invention and embodiments thereof make further retouch in detail
State.
As shown in figure 1, it is a kind of based on PLC control the superior fertilizer irrigation system of crops, including PC, PLC,
Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC is adopted
It is described as a kind of slave computer of the superior fertilizer irrigation system of crops based on PLC controls with S7-200 PLC
PLC upper end be connected with PC, as host computer, crops for inputting PC controls are superior to apply described PC
The process of the superior fertilizer irrigation of crops for information and real-time display the PLC control that fertilizer is irrigated；Described PLC left end point
It is not connected with Ph sensors, ion sensing electrode device；Described PLC right-hand member respectively with ion electrode control cabinet, pump
Valve control cabinet, fertilizer apparatus are connected, and ion electrode detecting system is provided with described ion electrode control cabinet；Described pump
Fertilising valve, fertilizing pump are installed on valve control cabinet, complete the superior fertilizer irrigation of crops.
Also, a kind of superior fertilizer irrigation system of crops based on PLC controls that the present invention uses, including PC, PLC control
Device processed, Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC controls
Device use S7-200 PLC, as it is a kind of based on PLC control the superior fertilizer irrigation system of crops slave computer,
Described PLC upper end is connected with PC, and described PC is as host computer, for inputting the crops essence of PC controls
The process of the superior fertilizer irrigation of crops of information and real-time display the PLC control of good fertilizer irrigation；Described PLC is left
End is connected with Ph sensors, ion sensing electrode device respectively；Described PLC right-hand member controls with ion electrode respectively
Case, pump valve control cabinet, fertilizer apparatus are connected, and ion electrode detecting system is provided with described ion electrode control cabinet；Institute
Fertilising valve, fertilizing pump are installed on the pump valve control cabinet stated, complete the superior fertilizer irrigation of crops, is that the present invention one is aobvious again
Work feature.
Preferred embodiment is further used as, described fertilizer apparatus includes venturi type fertilizer applicator, filter, fertilising
Pipe irrigates main pipeline, fertilizer bucket.
Preferred embodiment is further used as, described Ph sensors, main pipeline, fertilizer bucket are irrigated installed in fertilising pipe
Place.
It is further used as preferred embodiment, described ion sensing electrode device, installed in ion electrode detecting system
In.
Also, the fertilizer apparatus that the present invention uses, which includes venturi type fertilizer applicator, filter, fertilising pipe, irrigates main pipeline, fertilizer
Charging basket；Described Ph sensors, at fertilising pipe irrigation main pipeline, fertilizer bucket；Described ion sensing electrode device, installation
It is a distinguishing feature of the invention again in ion electrode detecting system.
Preferred embodiment is further used as, described ion electrode detecting system includes reference electrode, ion selects
Electrode, liquid manure solution, ion signal output circuit device, flow cell, electrochemical sensor；
The function of ion electrode detecting system：
First, co-implanted liquid manure solution forms a flow cell in reference electrode and ion-selective electrode；
Secondly, the concentration of ion is measured by measuring the electromotive force of flow cell；
Finally, the electrochemical sensor that the concentration of effects of ion is determined using membrane potential measures sensitive membrane and the phase of solution
The membrane potential directly relevant with ionic activity is produced on interface, measures the electromotive force of ion electrode, completes the ion of liquid manure solution
The irrigation of fertilizer.
Also, the ion electrode detecting system that uses of the present invention include reference electrode, ion-selective electrode, liquid manure solution, from
Subsignal output circuit device, flow cell, electrochemical sensor, it is a distinguishing feature of the invention again.
It is further used as preferred embodiment, described fertilising valve, installed in the upper end of venturi type fertilizer applicator.
Preferred embodiment is further used as, described fertilizing pump, main pipeline is irrigated installed in fertilizer bucket and fertilising pipe
Junction.
Also, the fertilising valve that the present invention uses, installed in the upper end of venturi type fertilizer applicator；Described fertilizing pump, is arranged on
Fertilizer bucket and fertilising pipe irrigate the junction of main pipeline, are a distinguishing feature of the invention again.
Embodiment 2
A kind of hot emerging system of liquid manure gas of the superior irrigation of crops realizes crops liquid manure gas heat fusion in warmhouse booth
Precision irrigation and the fertilising Automated condtrol process of intelligence, as shown in Fig. 2 a kind of crops based on PLC controls superior are applied
Fertile irrigation system, start working；PC works；PLC works；Ph working sensors；Ion sensing electrode device works；Ion
Electrode detection system works；Fertilising valve works；Apply fertilizer pump work；Judge whether that complete the superior irrigation of crops controls with automation
System；Complete the following steps such as precision irrigation and the Automated condtrol of the heat fusion of liquid manure gas：
Step 1：A kind of superior fertilizer irrigation system of crops based on PLC controls, starts working；
Step 2：PC works；
Step 3：PLC works；
Step 4：Ph working sensors；
Step 5：Ion sensing electrode device works；
Step 6：Ion electrode detecting system works；
Step 7：Fertilising valve works；
Step 8：Apply fertilizer pump work；
Step 9：Judge whether to complete the superior irrigation of crops and Automated condtrol；
Situation one：If the precision irrigation and Automated condtrol of liquid manure gas heat fusion, return to step two, PC works are not completed
Make；
Situation two：If completing the precision irrigation and Automated condtrol of liquid manure gas heat fusion, step 10 is performed；
Step 10：Complete the precision irrigation and Automated condtrol of liquid manure gas heat fusion.
The characteristics of of the invention most obvious compared with the superior fertilizer irrigation system of other crops is：
(1), the function of ion electrode detecting system：
First, co-implanted liquid manure solution forms a flow cell in reference electrode and ion-selective electrode；
Secondly, the concentration of ion is measured by measuring the electromotive force of flow cell；
Finally, the electrochemical sensor that the concentration of effects of ion is determined using membrane potential measures sensitive membrane and the phase of solution
The membrane potential directly relevant with ionic activity is produced on interface, measures the electromotive force of ion electrode, completes the ion of liquid manure solution
The irrigation of fertilizer.
(2), the present invention realizes the precision irrigation and the fertilising Automated condtrol of intelligence of crops liquid manure, saves manpower,
Production efficiency is improved, good economic benefit and social benefit can be produced.
Outstanding feature of the present invention：
1) a kind of, superior fertilizer irrigation system of crops based on PLC controls that the present invention uses, including PC, PLC control
Device processed, Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC controls
Device use S7-200 PLC, as it is a kind of based on PLC control the superior fertilizer irrigation system of crops slave computer,
Described PLC upper end is connected with PC, and described PC is as host computer, for inputting the crops essence of PC controls
The process of the superior fertilizer irrigation of crops of information and real-time display the PLC control of good fertilizer irrigation；Described PLC is left
End is connected with Ph sensors, ion sensing electrode device respectively；Described PLC right-hand member controls with ion electrode respectively
Case, pump valve control cabinet, fertilizer apparatus are connected, and ion electrode detecting system is provided with described ion electrode control cabinet；Institute
Fertilising valve, fertilizing pump are installed on the pump valve control cabinet stated, complete the superior fertilizer irrigation of crops；
2), the fertilizer apparatus that the present invention uses includes venturi type fertilizer applicator, filter, fertilising pipe irrigation main pipeline, fertilizer
Charging basket；Described Ph sensors, at fertilising pipe irrigation main pipeline, fertilizer bucket；Described ion sensing electrode device, installation
In ion electrode detecting system；
3), the ion electrode detecting system that uses of the present invention include reference electrode, ion-selective electrode, liquid manure solution, from
Subsignal output circuit device, flow cell, electrochemical sensor；
4), the fertilising valve that the present invention uses, installed in the upper end of venturi type fertilizer applicator；Described fertilizing pump, is arranged on
Fertilizer bucket and fertilising pipe irrigate the junction of main pipeline.
In addition to the implementation, the present invention can also have other embodiment.What all equivalent substitutions or equivalent transformation deformed
Technical scheme, in the claimed scope of the invention.Of the invention is that many features of embodiment and advantage are retouched in detail according to this
It is clear to state, therefore it is that falling into for embodiment is all in its true spirit and scope that appended claims, which are intended to cover these,
These feature and advantage.Further, since those skilled in the art is readily apparent that many modifications and changes, therefore it is not meant to this
Invention is that embodiment is limited to illustrated and description precision architecture and operation, but can cover and fall into owning in the range of it
Suitable modifications and equivalent.
Unspecified part of the present invention is technology known to the engineers and technicians of this area.
Claims (4)
- A kind of 1. superior fertilizer irrigation system of crops based on PLC controls, it is characterised in that：Including PC, PLC, Ph sensors, ion sensing electrode device, ion electrode control cabinet, pump valve control cabinet, fertilizer apparatus；Described PLC is adopted It is described as a kind of slave computer of the superior fertilizer irrigation system of crops based on PLC controls with S7-200 PLC PLC upper end be connected with PC, as host computer, crops for inputting PC controls are superior to apply described PC The process of the superior fertilizer irrigation of crops for information and real-time display the PLC control that fertilizer is irrigated；Described PLC left end point It is not connected with Ph sensors, ion sensing electrode device；Described PLC right-hand member respectively with ion electrode control cabinet, pump Valve control cabinet, fertilizer apparatus are connected, and ion electrode detecting system is provided with described ion electrode control cabinet；Described pump Fertilising valve, fertilizing pump are installed on valve control cabinet, complete the superior fertilizer irrigation of crops.
- A kind of 2. superior fertilizer irrigation system of crops based on PLC controls according to claim 1, it is characterised in that：Described fertilizer apparatus includes venturi type fertilizer applicator, filter, fertilising pipe and irrigates main pipeline, fertilizer bucket；Described Ph sensors, at fertilising pipe irrigation main pipeline, fertilizer bucket；Described ion sensing electrode device, in ion electrode detecting system.
- A kind of 3. superior fertilizer irrigation system of crops based on PLC controls according to claim 1, it is characterised in that：Described ion electrode detecting system includes reference electrode, ion-selective electrode, liquid manure solution, ion signal output circuit Device, flow cell, electrochemical sensor；The function of ion electrode detecting system：First, co-implanted liquid manure solution forms a flow cell in reference electrode and ion-selective electrode；Secondly, the concentration of ion is measured by measuring the electromotive force of flow cell；Finally, the electrochemical sensor that the concentration of effects of ion is determined using membrane potential measures the boundary of sensitive membrane and solution The upper generation membrane potential directly relevant with ionic activity, the electromotive force of ion electrode is measured, complete the ion fertilizer of liquid manure solution Irrigation.
- A kind of 4. superior fertilizer irrigation system of crops based on PLC controls according to claim 1, it is characterised in that：Described fertilising valve, installed in the upper end of venturi type fertilizer applicator；Described fertilizing pump, the junction of main pipeline is irrigated installed in fertilizer bucket and fertilising pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720201118.XU CN206790979U (en) | 2017-03-03 | 2017-03-03 | A kind of superior fertilizer irrigation system of crops based on PLC controls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720201118.XU CN206790979U (en) | 2017-03-03 | 2017-03-03 | A kind of superior fertilizer irrigation system of crops based on PLC controls |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896498A (en) * | 2018-04-25 | 2018-11-27 | 中国农业大学 | A method of nutrient solution ion EC contribution rate and conductivity are calculated based on ionic activity |
-
2017
- 2017-03-03 CN CN201720201118.XU patent/CN206790979U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896498A (en) * | 2018-04-25 | 2018-11-27 | 中国农业大学 | A method of nutrient solution ion EC contribution rate and conductivity are calculated based on ionic activity |
| CN108896498B (en) * | 2018-04-25 | 2020-07-21 | 中国农业大学 | Method for accounting ion EC contribution rate and conductivity of nutrient solution based on ion activity |
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