CN105974055A - Soilless culture nutrient solution phosphorus concentration online detection system and detection method thereof - Google Patents
Soilless culture nutrient solution phosphorus concentration online detection system and detection method thereof Download PDFInfo
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Abstract
The invention discloses a soilless culture nutrient solution phosphorus concentration online detection system and a detection method thereof. The system and the method realize online detection of the phosphorus concentration of a soilless culture nutrient solution. The system comprises a first sensor, a second sensor and a processing module, wherein the processing module is connected with the first sensor and the second sensor, the first sensor is used for acquiring the nitrogen ion concentration data of a nutrient solution to be detected and sending the nitrogen ion concentration data to the processing module, the second sensor is used for acquiring the volume data of the nutrient solution and sending the volume data to the processing module, and the processing module is used for determining the phosphorus concentration of the current nutrient solution based on the synchronous balanced nitrogen and phosphorus absorption of plants according to received nitrogen ion concentration data and the received volume data of the nutrient solution.
Description
Technical field
The present invention relates to cultivation technique without soil field, be specifically related to a kind of soilless culture nutrient fluid
Phosphorus concentration on-line detecting system and detection method.
Background technology
Cultivation technique without soil is a kind of to overturn traditional agriculture, and it uses nutritional solution or people
The mode long-term cropping of work solid matrix nutrient solution, has broken away from soil to agricultural production
Constraint.On the one hand fundamentally stopped the generation of native Hereditary diseases, on the other hand planted without soil
Training can utilize desert, salt-soda soil, building balcony and basement to carry out arviculture, right
The production space of agricultural is expanded.Soilless culture can be by regulating and controlling nutrient solution prescription
Realize crop nutrition content supply is accurately managed, it is achieved the stable market supply of crop nutrition content,
Avoid the occurrence of the situation that nutrient supply is not enough or superfluous, create for crop production Efficient Cultivation
Advantage.Soilless culture has developed into a kind of practical cultivation technique, the most extensively should
Produce and flower planting for vegetable.
Being different from soil cultivation, under soilless culture pattern, needed for crop, various nutrients are completely dependent on
In nutritional solution, change dynamic to nutrient solution prescription is monitored in real time, and in time to its component
Regulation and control are the guarantees of soilless culture crop nutrition content stable market supply, are also that soilless culture crop obtains
The premise of high yield.For nitrogen needed for plant growth, phosphorus, 3 kinds of a large amount of nutrients of potassium, nitrogen
(including nitrate nitrogen and ammonium nitrogen) and potassium can utilize the ion concentration sensor pair of commercialization
Its concentration change process is monitored in real time, and the detection of nutritional solution phosphorus concentration does not still have commercialization
Ion concentration sensor can use.On the one hand phosphorus be a large amount of units necessary to plant growth
Element, on the other hand phosphorus is also one of main cause causing widespread pollution from the overuse of fertilizers and pesticides in rural area.In nutritional solution, phosphorus is only
Can be measured by loaded down with trivial details chemical analysis method, relatively time-consuming arduously, purchase relevant
Instrument and equipment and reagent consumptive material too increase production cost.Under soilless culture pattern, nutrition
In liquid, obtaining in real time of phosphorus concentration efficiently produces for soilless culture crop and local water body environment
Protection have great significance.
In view of this, how the nothing soil that a kind of low cost, precision are higher and simple to operate is provided
Cultivating nutrient solution phosphorus concentration online test method, to realize soilless culture nutrient fluid phosphorus concentration
On-line checking, become technical problem urgently to be resolved hurrily.
Summary of the invention
For defect of the prior art, the embodiment of the present invention provides a kind of soil-less culturing nutrient
Liquid phosphorus concentration on-line detecting system and detection method.
On the one hand, a kind of soilless culture nutrient fluid phosphorus concentration of embodiment of the present invention proposition is examined online
Examining system, including:
First sensor, the second sensor and processing module;Wherein,
Described processing module connects described first sensor and the second sensor,
Described first sensor, is used for gathering nutritional solution Nitrogen ion concentration data to be detected, and
Described Nitrogen ion concentration data is sent to described processing module,
Described second sensor, for gathering the volume data of described nutritional solution, and by described
Volume data is sent to described processing module,
Described processing module, is used for principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to
The Nitrogen ion concentration data received and the volume data of nutritional solution determine the phosphorus of current nutritional solution
Concentration.
On the other hand, embodiment of the present invention proposition one utilizes above-mentioned soilless culture nutrient fluid phosphorus
The method that concentration on-line detecting system carries out on-line checking to soilless culture nutrient fluid phosphorus concentration,
Including:
S1, described processing module obtain the nutrition liquid nitrogen to be detected that described first sensor gathers
The volume data of the described nutritional solution of ion concentration data and described second sensor acquisition;
S2, described processing module principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to institute
The volume data stating Nitrogen ion concentration data and nutritional solution determines the phosphorus concentration of current nutritional solution.
The soilless culture nutrient fluid phosphorus concentration on-line detecting system of embodiment of the present invention offer and inspection
Survey method, the nutritional solution Nitrogen ion concentration data and second utilizing first sensor to gather senses
The volume data of the nutritional solution of device collection determines the phosphorus concentration of current nutritional solution, according to plant nitrogen
The principle that phosphorus simultaneous equation absorbs, achieves the online of phosphorus in nutritional solution by calculating and accurately surveys
Fixed, compared with traditional phosphorus determination method, whole detection process operation is simple, has saved people
Power resources costs and phosphorus determining instrument equipment and the fund cost of consumptive material, meanwhile, nutritional solution phosphorus
The real time measure of concentration avoids the time-lag effect that laboratory fractional analysis causes, for nutritional solution
The real-time and precise regulation and control of phosphorus concentration are laid a good foundation, and utilize the detection method that the present invention provides,
Water-soluble phosphorus concentration in soilless culture nutrient fluid is detected in real time, it is simple to according to detection letter
Breath carries out real-time monitoring to nutritional solution phosphorus concentration, it is ensured that the essence amount supply of soilless culture crop phosphorus,
Realize the maximization of nutritional solution phosphorus use efficiency, avoid the phosphorus of nutritional solution excess to be discharged into simultaneously
The pollution in environment caused local water body environment, for the high-quality and efficient product of soilless culture crop
Go out offer technology to ensure.
Accompanying drawing explanation
Fig. 1 is one soilless culture nutrient fluid phosphorus concentration on-line detecting system one enforcement of the present invention
The structural representation of example;
Fig. 2 is that each Proper Sampling Period water planting water spinach nitrogen content dynamically changes schematic diagram with phosphorus content;
Fig. 3 is a kind of side that soilless culture nutrient fluid phosphorus concentration carries out on-line checking of the present invention
The schematic flow sheet of method one embodiment.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will
In conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu ground describe, it is clear that described embodiment be a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Have and make the every other embodiment obtained under creative work premise, broadly fall into the present invention
The scope of protection.
Referring to Fig. 1, the present embodiment openly one soilless culture nutrient fluid phosphorus concentration on-line checking system
System, including:
First sensor the 1, second sensor 2 and processing module 3;Wherein,
Described processing module 3 connects described first sensor 1 and the second sensor 2,
Described first sensor 1, is used for gathering nutritional solution Nitrogen ion concentration data to be detected, and
Described Nitrogen ion concentration data is sent to described processing module 3,
Described second sensor 2, for gathering the volume data of described nutritional solution, and by described
Volume data is sent to described processing module 3,
Described processing module 3, is used for principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to
The Nitrogen ion concentration data received and the volume data of nutritional solution determine the phosphorus of current nutritional solution
Concentration.
The soilless culture nutrient fluid phosphorus concentration on-line detecting system that the present embodiment provides, utilizes the
The nutritional solution Nitrogen ion concentration data of one sensor acquisition and the nutritional solution of the second sensor acquisition
Volume data determine the phosphorus concentration of current nutritional solution, according to plant synchronous nitrogen and phosphorus Balance Absorption
Principle, by model calculate achieve the online Accurate Determining of phosphorus in nutritional solution, with tradition
Phosphorus determination method compare, whole detection process operation is simple, has saved cost of human resources
With phosphorus determining instrument equipment and the fund cost of consumptive material, meanwhile, nutritional solution phosphorus concentration real-time
Measure and avoid the time-lag effect that laboratory fractional analysis causes, for the reality of nutritional solution phosphorus concentration
Time control accurate lay a good foundation, utilize the detection method that the present invention provides, to soilless culture
In nutritional solution, water-soluble phosphorus concentration detects in real time, it is simple to according to detection information to nutritional solution
Phosphorus concentration carries out real-time monitoring, it is ensured that the essence amount supply of soilless culture crop phosphorus, it is achieved nutrition
The maximization of liquid phosphorus use efficiency, avoids the phosphorus of nutritional solution excess to be discharged in environment right simultaneously
The pollution that local water body environment causes, the high-quality and efficient output for soilless culture crop provides skill
Art ensures.
Alternatively, at another of soilless culture nutrient fluid phosphorus concentration on-line detecting system of the present invention
In embodiment, described processing module, specifically for:
Nutritional solution Nitrogen ion concentration C N according to initial time tt, the nutritional solution of initial time t
Volume Vt, nutritional solution Nitrogen ion concentration C N of current time t+ Δ tt+ΔtWith current time t+ Δ t
Nutritional solution volume Vt+ΔtCalculate the phosphorus concentration CP of current nutritional solutiont+Δt, computing formula isWherein, CPtNutrition for initial time t
The concentration of the phosphorus in liquid, α and β plant the most set in advance, described absorbed nitrogen phosphorus amount
Proportionality coefficient, PAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Phosphorus content, NAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Nitrogen content, PA>=0, NA≥0。
In the embodiment of the present invention, based on plant to the collaborative absorption according to a certain percentage of required nutrient
The phosphorus content that plant is absorbed by the Nitrogen ion content that principle absorbs according to plant is estimated, root
The phosphorus content absorbed according to plant calculates current nutritional solution phosphorus concentration, thus it is dense to realize nutritional solution phosphorus
The on-line checking of degree.In one embodiment, its workflow is described in detail as follows:
(1) by Nitrogen ion concentration sensor, nutritional solution Nitrogen ion concentration is detected in real time, its
Middle initial time t and current time t+ its detected value of Δ t are respectively CNtAnd CNt+Δt;By body
The volume of nutritional solution is detected by long-pending sensor in real time, wherein initial time t and current time
T+ its detected value of Δ t is respectively VtAnd Vt+Δt.Now, the nitrogen that plant absorbs within the Δ t period
Content be UN, can be calculated by following formula:
UN=CNt×Vt+NA-CNt+Δt×Vt+Δt, NAFor adding in nutritional solution in the Δ t period
The content of nitrogen, NA≥0(NANutritional solution is the most additionally added) in=0 expression Δ t period.
(2) synchronize the principle absorbed according to plant nitrogen, phosphorus, phosphorus in the Δ t period can be calculated
Absorbtivity UP, computing formula such as following formula:
UP=α × UN+ β=α × (CNt×Vt+NA-CNt+Δt×Vt+Δt)+β, α and β respectively plant
The proportionality coefficient of the amount of the nitrogen that the content of the phosphorus that strain absorbs absorbs with this plant, with the kind of plant
Class is relevant with period of duration, can measure by different plants sample nitrogen phosphorus is absorbed content analysis
Rear acquisition;NAContent for the nitrogen in the nutritional solution of addition in the Δ t period.
(2) at known initial time t nutrient solution prescription phosphorus concentration CPt(generally formula is sought
Nutrient solution phosphorus concentration) on the premise of, t+ Δ t can be calculated according to substance conservation principle
Nutritional solution phosphorus concentration CPt+Δt, computing formula such as following formula:
PAFor adding in nutritional solution in the Δ t period
Phosphorus content, PA≥0(PANutritional solution is the most additionally added) in=0 expression Δ t period.
Alternatively, at another of soilless culture nutrient fluid phosphorus concentration on-line detecting system of the present invention
In embodiment, described processing module, it is additionally operable at the phosphorus concentration CP calculating current nutritional solutiont+Δt
Before, obtain content and the content of nitrogen of the phosphorus that this plant of multiple moment absorbs, and pass through
Described many content of group phosphorus and the content of nitrogen are carried out linear fit, determines described α and β.
As a example by water planting water spinach, calculating to α and β of the present invention is described in detail below, tool
Body step is as follows:
(1) from field planting to results, different phase water spinach nitrogen content and phosphorus content are surveyed
Amount;
Result is as in figure 2 it is shown, figure it is seen that from field planting to results, water planting is hollow
Dish nitrogen content is at 38mg g-1Left and right, phosphorus content is at 8.0mg g-1Left and right, is relative constancy
Value,
(2) many group water spinach nitrogen contents and phosphorus content are carried out linear regression, obtain α=0.32,
β=5.02.
Alternatively, at another of soilless culture nutrient fluid phosphorus concentration on-line detecting system of the present invention
In embodiment, described first sensor is Nitrogen ion concentration sensor, described second sensor
For nutritional solution level pressure sensor, it is used for calculating the volume of nutritional solution.
Referring to Fig. 3, the present embodiment discloses a kind of nothing soil utilized described in any one of previous embodiment
Soilless culture nutrient fluid phosphorus concentration is carried out online by cultivating nutrient solution phosphorus concentration on-line detecting system
The method of detection, including:
S1, described processing module obtain the nutrition liquid nitrogen to be detected that described first sensor gathers
The volume data of the described nutritional solution of ion concentration data and described second sensor acquisition;
S2, described processing module principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to institute
The volume data stating Nitrogen ion concentration data and nutritional solution determines the phosphorus concentration of current nutritional solution.
What the embodiment of the present invention provided carries out on-line checking to soilless culture nutrient fluid phosphorus concentration
Method, utilizes nutritional solution Nitrogen ion concentration data and the second sensor that first sensor gathers
The volume data of the nutritional solution gathered determines the phosphorus concentration of current nutritional solution, according to plant nitrogen phosphorus
The principle that simultaneous equation absorbs, achieves the online Accurate Determining of phosphorus in nutritional solution by calculating,
Compared with traditional phosphorus determination method, whole detection process operation is simple, has saved manpower money
Source cost and phosphorus determining instrument equipment and the fund cost of consumptive material, meanwhile, nutritional solution phosphorus concentration
The real time measure avoid the time-lag effect that laboratory fractional analysis causes, dense for nutritional solution phosphorus
The real-time and precise regulation and control of degree are laid a good foundation, and utilize the detection method that the present invention provides, to nothing
In soil cultivating nutrient solution, water-soluble phosphorus concentration detects in real time, it is simple to according to detection information pair
Nutritional solution phosphorus concentration carries out real-time monitoring, it is ensured that the essence amount supply of soilless culture crop phosphorus, real
The maximization of existing nutritional solution phosphorus use efficiency, avoids the phosphorus of nutritional solution excess to be discharged into ring simultaneously
The pollution in border caused local water body environment, for the high-quality and efficient output of soilless culture crop
Offer technology ensures.
Alternatively, in the present invention, soilless culture nutrient fluid phosphorus concentration is carried out the side of on-line checking
In another embodiment of method, described S2, including:
Nutritional solution Nitrogen ion concentration C N according to initial time tt, the nutritional solution of initial time t
Volume Vt, nutritional solution Nitrogen ion concentration C N of current time t+ Δ tt+ΔtWith current time t+ Δ t
Nutritional solution volume Vt+ΔtCalculate the phosphorus concentration CP of current nutritional solutiont+Δt, computing formula isWherein, CPtNutrition for initial time t
The concentration of the phosphorus in liquid, α and β plant the most set in advance, described absorbed nitrogen phosphorus amount
Proportionality coefficient, PAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Phosphorus content, NAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Nitrogen content, PA>=0, NA≥0。
Alternatively, in the present invention, soilless culture nutrient fluid phosphorus concentration is carried out the side of on-line checking
In another embodiment of method, in the described nutritional solution Nitrogen ion concentration according to initial time t
CNt, the nutritional solution volume V of initial time tt, the nutritional solution Nitrogen ion of current time t+ Δ t
Concentration C Nt+ΔtNutritional solution volume V with current time t+ Δ tt+ΔtCalculate current nutritional solution
Phosphorus concentration CPt+ΔtBefore, also include:
Described processing module obtains the content of phosphorus and the containing of nitrogen that this plant of multiple moment absorbs
Amount, and by described many content of group phosphorus and the content of nitrogen are carried out linear fit, determine institute
State α and β, the content of described many group phosphorus and the content of nitrogen by Plant samples assay
Preliminary experiment obtains.
Although be described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art
Various modifications and variations can be made without departing from the spirit and scope of the present invention,
Within the scope of such amendment and modification each fall within and are defined by the appended claims.
Claims (7)
1. a soilless culture nutrient fluid phosphorus concentration on-line detecting system, it is characterised in that bag
Include:
First sensor, the second sensor and processing module;Wherein,
Described processing module connects described first sensor and the second sensor,
Described first sensor, is used for gathering nutritional solution Nitrogen ion concentration data to be detected, and
Described Nitrogen ion concentration data is sent to described processing module,
Described second sensor, for gathering the volume data of described nutritional solution, and by described
Volume data is sent to described processing module,
Described processing module, is used for principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to
The Nitrogen ion concentration data received and the volume data of nutritional solution determine the phosphorus of current nutritional solution
Concentration.
System the most according to claim 1, it is characterised in that described processing module,
Specifically for:
Nutritional solution Nitrogen ion concentration C N according to initial time tt, the nutritional solution of initial time t
Volume Vt, nutritional solution Nitrogen ion concentration C N of current time t+ Δ tt+ΔtWith current time t+ Δ t
Nutritional solution volume Vt+ΔtCalculate the phosphorus concentration CP of current nutritional solutiont+Δt, computing formula isWherein, CPtNutrition for initial time t
The concentration of the phosphorus in liquid, α and β plant the most set in advance, described absorbed nitrogen phosphorus amount
Proportionality coefficient, PAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Phosphorus content, NAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Nitrogen content, PA>=0, NA≥0。
System the most according to claim 2, it is characterised in that described processing module,
It is additionally operable at the phosphorus concentration CP calculating current nutritional solutiont+ΔtBefore, multiple this kind of moment is obtained
The content of the phosphorus that plant absorbs and the content of nitrogen, and by the described content organizing phosphorus and nitrogen more
Content carry out linear fit, determine described α and β.
System the most according to claim 1, it is characterised in that described first sensor
For Nitrogen ion concentration sensor, described second sensor is level pressure sensor, is used for counting
Calculate the volume of nutritional solution.
5. the soilless culture nutrient fluid phosphorus that one kind utilizes described in any one of claim 1 to 4 is dense
The method that degree on-line detecting system carries out on-line checking to soilless culture nutrient fluid phosphorus concentration, bag
Include:
S1, described processing module obtain the nutrition liquid nitrogen to be detected that described first sensor gathers
The volume data of the described nutritional solution of ion concentration data and described second sensor acquisition;
S2, described processing module principle based on plant synchronous nitrogen and phosphorus Balance Absorption, according to institute
The volume data stating Nitrogen ion concentration data and nutritional solution determines the phosphorus concentration of current nutritional solution.
Method the most according to claim 5, it is characterised in that described S2, including:
Nutritional solution Nitrogen ion concentration C N according to initial time tt, the nutritional solution of initial time t
Volume Vt, nutritional solution Nitrogen ion concentration C N of current time t+ Δ tt+ΔtWith current time t+ Δ t
Nutritional solution volume Vt+ΔtCalculate the phosphorus concentration CP of current nutritional solutiont+Δt, computing formula isWherein, CPtNutrition for initial time t
The concentration of the phosphorus in liquid, α and β plant the most set in advance, described absorbed nitrogen phosphorus amount
Proportionality coefficient, PAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Phosphorus content, NAFor the nutritional solution added in initial time t to current time t+ Δ t time period
Nitrogen content, PA>=0, NA≥0。
Method the most according to claim 6, it is characterised in that initial in described basis
Nutritional solution Nitrogen ion concentration C N of moment tt, the nutritional solution volume V of initial time tt, current
Nutritional solution Nitrogen ion concentration C N of moment t+ Δ tt+ΔtNutrient liquid with current time t+ Δ t
Long-pending Vt+ΔtCalculate the phosphorus concentration CP of current nutritional solutiont+ΔtBefore, also include:
Described processing module obtains the content of phosphorus and the containing of nitrogen that this plant of multiple moment absorbs
Amount, and by described many content of group phosphorus and the content of nitrogen are carried out linear fit, determine institute
State α and β, the content of described many group phosphorus and the content of nitrogen by Plant samples assay
Preliminary experiment obtains.
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CN112997870A (en) * | 2019-12-19 | 2021-06-22 | 松下知识产权经营株式会社 | Plant cultivation method and plant cultivation system |
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CN112997870A (en) * | 2019-12-19 | 2021-06-22 | 松下知识产权经营株式会社 | Plant cultivation method and plant cultivation system |
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