KR101316593B1 - Apparatus for regulating plant growth by controling environment - Google Patents

Abstract

The present invention relates to a plant growth regulator. The present invention is a plant growth control chamber 20 is disposed in the plant to be measured therein, the control unit for adjusting the brightness, temperature, humidity inside the plant growth control chamber 20, and the plant growth control chamber 20 Based on the gas analyzer 40 for measuring the carbon dioxide exchange rate of the plant (m) disposed therein, and based on the measurement result of the gas analyzer 40 or a preset program or plant growth analysis program, the plant growth control chamber It includes a control unit 65 for controlling at least one selected from the temperature, humidity, luminous intensity.
The present invention is able to derive and control the sticking conditions that ensure the high survival rate of the plant after grafting to improve the quality of the plant. This has the advantage that can be utilized in the lifesaving and implementation of photosynthesis and growth promoting environment of various plants, including grafted seedlings.

Description

Apparatus for regulating plant growth by controling environment

The present invention relates to an apparatus for controlling plant growth, and more particularly, it is possible to continuously measure an assimilation amount of a plant at the same time in a moving image having different environmental conditions, and further to maximize the photosynthesis compared with a given growth value. It relates to a plant growth regulator that can be adjusted.

Photosynthesis is the basic physiology necessary for plant growth and growth. It uses light (sunshine) to synthesize glucose with carbon dioxide and water in the atmosphere and produce oxygen as a surplus.

Therefore, photosynthesis is a basic element for understanding the physiology and ecological reactions of plants. As photosynthesis reacts in real time according to changes in the environment of plants (light, temperature, humidity, moisture, etc.) Research and invention have been made.

Photosynthesis of plants is measured by gas transport (the exchange rate of carbon dioxide and oxygen) and the amount of evapotranspiration. The measuring devices to quantify this include portable measuring devices, LC4-A (ADC Bioscientific, UK), CIRAS-2 (PP). system INC. (UK), CI-340 (CID Inc., USA), GFS 3000 (Walz, Germany), LI-6400 (Li-COR Biosciences, USA) and the like.

Among them, the LI-6400 series has been widely used in the field of laboratories and packaging because of its excellent accuracy and easy mobility.

However, LI-6400 (or upgraded type), a portable photosynthesis measuring device, is designed to measure short-term photosynthesis and transpiration of microenvironment by placing a single leaf or a part in a small chamber where temperature and quantity of light are controlled. Therefore, it is not possible to analyze the response to photosynthesis of the whole plant. Therefore, there is a limit that it is difficult to measure the continuous photosynthetic reaction under changing environmental conditions of several days or more because only short-term measurement within several hours to several minutes is possible.

In particular, it is difficult to continuously measure photosynthesis of many grafted seedlings simultaneously by arbitrarily adjusting the brightness and temperature under special conditions that actively give humidity (70% to 95%) in order to find suitable environmental conditions for vegetable grafting. There is this.

An object of the present invention is to measure the amount of gas (carbon dioxide and oxygen) exchange of plants to analyze the change in photosynthesis in a continuous and real-time, at this time, the light environment (light, photo quality, photoperiod, etc.), It is to provide a plant growth control device that can differently control the conditions of temperature environment (air temperature, root zone temperature), moisture environment (humidity, root zone moisture), gas environment (carbon dioxide and oxygen concentration, etc.).

According to a feature of the present invention for achieving the object as described above, the present invention is a plant growth control chamber in which the plant to be measured is disposed therein, and an adjustment unit for adjusting the brightness, temperature, humidity in the plant growth control chamber And a gas analyzer measuring a carbon dioxide exchange rate of a plant disposed in the plant growth control chamber, and a temperature inside the plant growth control chamber based on a measurement result of the gas analyzer or a preset program or plant growth analysis program. It includes a control unit for controlling at least one selected from the humidity, brightness.

The control unit includes a light source, a heat source, a humidifier, a dehumidification and cooling device, and a dehumidifier.

The plant growth control chamber is provided with a sensor for measuring the light intensity, temperature, humidity therein.

The plant growth control chamber is formed with an inlet and an outlet for air inlet and outlet, the inlet and outlet are connected to the inlet and outlet, respectively, a humidifier is installed in the inlet, discharge valve is installed in the outlet. .

The discharge pipe is connected to the dehumidifier, the gas analyzer is installed on the outlet side of the dehumidifier.

The gas analyzer analyzes the carbon dioxide exchange rate of the plant by the difference in carbon dioxide concentration between the air of the inlet pipe and the air of the outlet pipe.

The plant growth control chamber is a horizontal parallel form or a vertical parallel form or a multi-stage configuration, it is composed of a plurality.

The plant growth control chamber is installed in a separate buffer chamber (Air buffer room) to control the concentration of carbon dioxide therein.

The plant growth control chamber is composed of a heat insulating material for maintaining the environment independent of the outside.

The control unit is a plant growth analysis program execution device.

The plant growth regulator of the present invention is capable of "preserving various environmental conditions and photosynthesis such as plant reaction" and "exploring environmental conditions for photosynthesis and growth of plants", so that the conditions for ensuring high survival rate of plants after grafting are provided. It is possible to derive the effect that can be expected to improve the quality of the plant.

In particular, the plant growth regulator of the present invention can determine the environment for promoting photosynthesis by measuring the carbon dioxide exchange rate and thereby control the period during the fusion and purification of plants, thereby increasing the productivity of the plants, without using pesticides Can improve the quality of the plant, there is an effect that can produce a high pesticide-free plant.

1 is a block diagram showing a preferred embodiment of the plant growth regulator according to the present invention.
Figure 2 is a graph showing the carbon dioxide concentration difference between the inside and outside of the plant growth control chamber (buffer chamber) over time in the absence of cucumber grafted seedlings in the plant growth control chamber.
Figure 3 is a graph showing the relative humidity and air temperature in the sliding phase according to the grafting period of cucumber.
Figure 4 is a graph measuring the carbon dioxide exchange rate of cucumber grafted seedlings during grafting period (fusion and purification).
5 is a graph showing the average net photosynthetic amount (P _net ) and respiratory volume (R _dark ) during the night period of cucumber grafted seedlings based on the leaf area (P _gross = P _net + R _dark ).

Hereinafter, the present invention will be described in detail.

The plant growth regulator of the present invention is a plant growth regulator capable of continuously measuring an assimilation amount, and can implement various environmental conditions such as temperature, humidity, and brightness, and measure the photosynthesis and respiration of plants under various environmental conditions. The plant growth reaction according to the conditions is followed. Plants include live seedlings, grafted seedlings, cutting seedlings, and the like.

Seeds raised by sowing seeds are called real seedlings, and grafted nursery is obtained by attaching the eye of the plant or the stem of the eye (scissor) to the rooted stem or root (rootstock). It is called a plant, and a seedling produced as an independent plant by cutting off part of the plant nutritional organ from the mother, inserting it into soil or sand, and rooting and germinating.

Such live seedlings, grafting seedlings, and cutting seedlings may cause problems such as plant coating, disease, and complex ignition inflation (for example, tomatoes) if the environmental management is incorrect during production. Painting means that plants grow taller and weaker overall. When plants are painted, normal growth is difficult and it is difficult to get enough harvest.

This provides a plant growth regulator that can follow the plant growth response according to the environmental conditions of the plant to improve the quality of the plant and increase the productivity.

As shown in FIG. 1, the plant growth control device 1 adjusts the brightness, temperature, and humidity of the plant growth control chamber 20 and the plant growth control chamber 20 in which the plant to be measured is disposed therein. Control unit, gas analyzer 40 for measuring the carbon dioxide exchange rate of the plant (m) disposed in the plant growth control chamber 20, the measurement results of the gas analyzer 40 or a predetermined program or plant growth analysis program Based on the control unit 65 for controlling at least one selected from the temperature (atmosphere, soil), humidity, light intensity inside the plant growth control chamber.

Plant growth control chamber 20 is installed in a separate buffer chamber (Air buffer room) 10 for controlling the concentration of carbon dioxide therein. The buffer chamber 10 is formed in a closed type capable of environmental control including temperature for controlling carbon dioxide concentration in the plant growth control chamber 20. Specifically, the plant growth control chamber 20 is configured to independently control the environment, including the brightness, temperature, humidity.

The control unit includes a light source 55, a heat source 45, a humidifier 50, a dehumidification and cooling device (not shown), and a dehumidifier 39.

The temperature is controlled by a heat source 45, a dehumidification and cooling device disposed inside each plant growth control chamber 20, and the humidity is a humidifier 50 installed at the inlet side of the plant growth control chamber 20 and the dehumidification and cooling. It is controlled by the device, the brightness is controlled by a light source 55 disposed above the plant growth control chamber (20).

The heat source 45 may be a heating coil or a general heater.

The dehumidification and cooling device is disposed inside the plant growth control chamber 20, and is used to remove humidity in the plant growth control chamber 20 to lower humidity or lower temperature. Dehumidification and cooling device may be installed separately in the plant growth control chamber 20, or may be installed so that two functions can be implemented in one device. For example, the dehumidification and cooling device may be in the form of an air conditioner.

The humidifier 50 may be a humidifier of the method in which water is injected into the air introduced into the plant growth control chamber 20 so that water is included in the air.

The light source 55 may be a high-pressure sodium lamp, a metal halogen lamp, a fluorescent lamp, or a light emitting diode (LED) as an artificial light source.

A plurality of light sources 55 are installed on or inside the plant growth control chamber 20. The luminous intensity is determined as the number of light sources 55 and luminous intensity measurement is performed by the photometer. As a photometer, a photometer having a plurality of sensing bar photons is used.

The dehumidifier 39 is installed outside the plant growth chamber 20 and serves to lower the humidity of the analysis air flowing into the gas analyzer 40. Dehumidification of the sample air before measuring the concentration of carbon dioxide is necessary in order to exclude the influence of moisture when measuring the concentration of carbon dioxide (CO ₂ ) contained in the air using the gas analyzer 40.

The plant growth control chamber 20 is designed to continuously measure the carbon dioxide exchange rate during the growth of the plant m (including fusion and purification of the grafted seedlings). CO2 exchange rate is important for understanding physiological processes such as plant development stage, plant yield, and conditions to minimize plant stress.

Plant growth control chamber 20 may be a box of a transparent acrylic plastic material on the front or top. The plant growth control chamber 20 is provided with an opening and closing port (not shown) on one side, the space portion 21 is formed in which the plant (m) is disposed, the air flow inside the plant growth control chamber 20 on one side It has a structure provided with an inlet 23 and an outlet 25 for.

Plant growth control chamber may be composed of a thermal insulation material to maintain the environment independent from the outside.

An inlet pipe 27 for inlet air is connected to the inlet port 23, and an outlet pipe 29 for exhausting air is connected to the outlet port 25. A humidifier 50 is installed in front of the inlet pipe 27, and a discharge valve 31 is installed behind the discharge pipe 29, respectively.

The discharge valve 31 is always open, but is configured to allow air (carbon dioxide) in the plant growth control chamber 20 to flow into the gas analyzer 40 when necessary.

Plant growth control chamber 20 is a plant (m) or plug seedling is disposed in the space portion 21 through the opening and closing. After the plant m or the plug seedling is disposed in the space portion 21, the opening and closing port is sealed to maintain a constant air pressure in the space portion 21.

The plant growth control chamber 20 is a horizontal parallel form or a vertical parallel form or a multi-stage form, it may be composed of a plurality.

The circulation fan 33 is installed inside the plant growth control chamber 20. The circulation fan 33 functions to continuously circulate the air in the plant growth control chamber 20. In front of the circulation fan 33 is provided with an aluminum material (not shown) for dispersing the air flow during circulation.

The inlet pipe 27 and the discharge pipe 29 are provided with circulation pumps 35 and 37, respectively, and between the circulation pump 35 of the inlet pipe 27 and the circulation pump 37 of the discharge pipe 29, a dehumidifier ( 39 and a gas analyzer 40 are installed. Each circulation pump (35, 37) helps smooth air circulation inside the plant growth control chamber (20).

As described above, the dehumidifier 29 removes the moisture of the air in the plant growth control chamber 20 flowing through the discharge pipe 29 to the gas analyzer 40.

The gas analyzer 40 continuously measures the carbon dioxide concentration of the plant m in the plant growth control chamber 20. The carbon dioxide concentration measured by the gas analyzer 40 is used for the carbon dioxide exchange rate analysis. The gas analyzer 40 may be an infrared gas analyzer.

The carbon dioxide exchange rate is the concentration of carbon dioxide contained in air discharged from the plant growth control chamber 20 through the inlet pipe 27 and the carbon dioxide contained in the air flowing into the plant growth control chamber 20 through the discharge pipe 29. Analyze by car. The air discharged from the plant growth control chamber 20 is dehumidified to analyze the carbon dioxide concentration, and the photosynthesis and respiratory response of the plant (m) are measured by the analyzed carbon dioxide exchange rate.

The sensor 60 is installed in the plant growth control chamber 20 and includes a photometer, a thermocouple, and a hygrometer. The photometer measures the light intensity inside the plant growth control chamber 20, the thermocouple measures the temperature inside the plant growth control chamber 20, and the hygrometer measures the relative humidity inside the plant growth control chamber 20.

In addition to the sensor 20 in the plant growth control chamber 20 may further include a load cell for measuring the weight of the plant (m). The load cell provides data on weight gain, transpiration, etc. during the treatment period under the specific environmental conditions of the plant in the plant growth control chamber, so that the growth response of the plant to the environment along with photosynthesis data can be understood.

Temperature, humidity, brightness information and the carbon dioxide exchange rate information measured by the gas analyzer 40 in the plant growth control chamber 20 sensed by the sensor 60 is transmitted to the controller 65.

The control unit 65 receives the information signals of the gas analyzer 40 and the detection sensor 60, and selects among temperature, humidity, and brightness based on the environmental control program or the gas analyzer's measurement result and the plant growth analysis program. Controls one or more species.

For example, the controller 65 may be a plant growth analysis program performing apparatus for controlling an environment such as temperature, humidity, brightness, etc. in the plant growth control chamber 20 based on the assimilation amount of the gas analyzer 40.

The supply of carbon dioxide is performed through the carbon dioxide supply unit 70 disposed outside the buffer chamber 10.

Reference numeral 75 is a flow meter for measuring the flow rate of air flowing into the plant growth control chamber 20, 80 is a sampling unit for sampling the air dehumidified from the plant growth control chamber 20 for measuring the carbon dioxide concentration to be.

Hereinafter will be described the action of the plant growth regulator of the present invention having the configuration as described above.

Plant growth regulator 1 implements a variety of environmental conditions, by measuring the carbon dioxide exchange rate of the plant (m) disposed in the plant growth control chamber 20 to measure the photosynthesis and respiratory response of the plant (m).

The method includes placing the plant m in the plant growth control chamber and controlling the heat source 45, the humidifier 50, the dehumidifier 39 and the light source 55 to control the temperature, humidity, Adjust the brightness.

In this process, the circulation pumps 35 and 37 of the discharge pipe 29 are operated at every set time to circulate the air inside the plant growth control chamber 20 and to sample the circulated air when necessary (for example, at each set time). To measure the carbon dioxide exchange rate of the plant (m).

The CO2 exchange rate is measured during the growth of the plant (m), including the fusion and purification processes. The CO2 exchange rate is used to measure the photosynthetic and respiratory responses of the plant to determine the optimal environmental conditions for promoting photosynthesis and growth of the plant.

Hereinafter, the present invention will be described in more detail through experimental examples. However, it should be noted that the scope of the present invention is not limited by the following experimental examples.

<Experimental Example>

As an example of plants, cucumber grafted seedlings are placed in a plant growth control chamber, and carbon dioxide exchange rates are continuously measured during fusion and purification of cucumber grafted seedlings while controlling temperature, humidity and brightness.

The brightness within the plant growth control chamber is distributed uniformly, and the brightness level is adjusted as the number of lamps. In this embodiment, six fluorescent lamps are mounted in parallel about 30 cm from the top of the plant growth control chamber.

The temperature inside the buffer chamber (Air buffer room) is basically maintained at 25 ° C, and the temperature inside the plant growth control chamber is maintained at a range of 26.7 + 3 ° C using a heat source. If the temperature becomes 27 ° C or higher, the temperature of the plant growth control chamber is lowered by circulating cooling water of 8 to 12 ° C using a dehumidifier and a dehumidification and cooling device.

The relative humidity inside the plant growth control chamber is controlled by operating a humidifier. To reduce the humidity inside the plant growth control chamber, operate the dehumidifier and the dehumidification and cooling system.

Carbon dioxide is injected into the buffer chamber from the carbon dioxide supply. The concentration of carbon dioxide injected into the buffer chamber is adjusted to 1000 μmolmol ⁻¹ . The carbon dioxide injected into the buffer chamber is mixed with the air supplied to each plant growth control chamber and supplied into the plant growth control chamber.

The carbon dioxide supplied into the plant growth control chamber is measured at a gas analyzer, and the carbon dioxide exchange rate of the plants disposed inside the plant growth control chamber is measured at a gas analyzer after the moisture contained in the air is removed from the dehumidifier.

Figure 2 shows the difference in carbon dioxide concentration inside and outside the plant growth control chamber (buffer chamber) over time in the absence of cucumber grafted seedlings in the plant growth control chamber.

In Figure 2 the vertical bar of carbon dioxide represents the standard deviation (none = 3).

Figure 3 shows the relative humidity and air temperature according to the day after transplanting cucumber grafted seedlings. Air temperature was set to 27 ℃, relative humidity was not controlled during the night period, it was set to 85%, 80%, 70% at two-day intervals only during the day (14 hours).

Figure 4 measures the rate of carbon dioxide exchange after transplanting the cucumber grafted seedlings during fusion and purification, and Figure 5 shows the average net photosynthetic amount (P _net ) during the daytime period of cucumber grafting seedlings based on the leaf area during fusion and purification and during the night period. Respiration (R _dark ) is shown. P _gross is total photosynthesis plus net respiration.

Measurements were repeated three times and cucumber grafted seedlings were exposed to 120-200-200 μmol ^-2 s ^-1 luminosity, 85%, 80%, and 70% relative humidity every two days during daytime (14 hours) during fusion and purifying. And the air temperature was maintained at 27 ° C. all day. The concentration of carbon dioxide mixed in the air is adjusted to 1000 μmolmol ⁻¹ .

As a result, as shown in Fig. 4, cucumber grafted seedlings were exposed to gradually higher luminosity and low relative humidity conditions during fusion and purifying, and the cotyledons of grafted seedlings withered until the 3rd day after grafting with a relative humidity lowered from 85% to 80%. there was.

From the biological point of view, the CO2 exchange rate was higher than the photosynthetic amount at (-) value for 2 days after grafting, but gradually increased to (+) value so that the photosynthetic amount was higher than the respiratory rate.

As shown in FIG. 5, in the early stage, the cancer (night period) respiration was similar to the carbon dioxide exchange rate during the day period. This shows high breathing of cucumber grafted seedlings during the first two days of the fusion phase and seems to have persisted thereafter. This high breathing period during the night is due to post-transplant stress.

Photosynthesis process is very sensitive to stress, so the physiological state of grafted seedlings and the management of plant stress should be considered important. Therefore, it can be seen that it is important to know when the plant is exposed to light, when the humidity decreases, or when the carbon dioxide is exchanged.

In addition, in the study of transplanted plants, it can be seen that humidity management is a major condition to ensure high survival rate, and that a high humidity environment provided during fusion and purification is a key condition to ensure high survival rate.

Through this, it can be seen that the plant growth regulator is capable of analyzing photosynthetic properties under various environmental conditions as well as studying the physiological response of plants after grafting.

In addition, it can be seen that when the plant growth regulator is used, environmental control such as light intensity and carbon dioxide concentration increase is also possible to promote photosynthesis of plants after the plants are fused.

In addition, the photosynthesis of a number of grafted seedlings can be measured simultaneously by arbitrarily adjusting the brightness and temperature under special conditions of actively applying humidity (70% to 95%) in order to find suitable environmental conditions for the grafting of vegetable grafted seedlings. .

The present invention described above is applicable to general plants other than the grafted seedlings, and also to larger plants by adjusting the scale of the plant growth control chamber.

In addition, the present invention can be applied to the program for controlling the plant environment based on the amount of assimilation measured by the gas analyzer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. will be.

1: plant growth regulator 10: buffer chamber
20: plant growth control chamber 21: space
23: Inlet 25: Outlet
27: inlet tube 29: discharge tube
31: discharge valve 33: circulation fan
35, 37: circulation pump 39: dehumidifier
40: gas analyzer 45: heat source
50: humidifier 55: light source
60: detection sensor 65: control unit
70: carbon dioxide supply unit m: plant

Claims (10)

A plant growth control chamber in which the plant to be measured is arranged;
A control unit for adjusting the brightness, temperature, and humidity inside the plant growth control chamber;
A gas analyzer for measuring a carbon dioxide exchange rate of a plant disposed in the plant growth control chamber;
And a controller for controlling at least one selected from temperature, humidity, and light intensity in the plant growth control chamber based on a measurement result of the gas analyzer or a preset program or plant growth analysis program.
The plant growth control chamber
Inlets and outlets for air inlet and outlet are formed,
The inlet and outlet are connected to the inlet and outlet, respectively,
The gas analyzer plant growth control device characterized in that for analyzing the carbon dioxide exchange rate of the plant by the difference in carbon dioxide concentration of the air of the inlet pipe and the air of the discharge pipe. The method according to claim 1,
The control unit plant growth control device comprising a light source, heat source, humidifier, dehumidification and cooling device, dehumidifier. The method according to claim 1,
Plant growth control device, characterized in that the plant growth control chamber is provided with a sensor for measuring the brightness, temperature, humidity therein. The method according to claim 1,
Humidifier is installed in the inlet pipe, plant growth control device characterized in that the discharge valve is installed in the discharge pipe. The method according to claim 1,
The discharge pipe is connected to the dehumidifier,
Plant growth regulator, characterized in that the gas analyzer is installed on the outlet side of the dehumidifier. delete The method according to claim 1,
The plant growth control chamber is a horizontal parallel form or a vertical parallel form or a multi-stage form, plant growth control device characterized in that composed of a plurality. The method according to claim 1,
The plant growth control chamber is a plant growth control device, characterized in that installed in a separate buffer chamber (Air buffer room) to control the concentration of carbon dioxide inside. The method according to claim 1,
The plant growth control chamber is a plant growth control device, characterized in that consisting of a heat insulating material for maintaining the environment independent from the outside. The method according to claim 1,
The control unit is a plant growth control device, characterized in that the plant growth analysis program execution device.

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