JPH04216463A - Method for monitoring state of plant - Google Patents

Abstract

PURPOSE:To rapidly and accurately monitor the health or growth state of a plant. CONSTITUTION:In a method for monitoring the state of a plant, at first, a live plant is grown under many kinds of environments different in temp., humidity, the quantity of sunshine or the like and temporarily set to a carbon dioxide atmosphere during growth to detect fluorescence generated from the irradiated part with exciting light and the correlation between the kind of growing environment and the detection result of fluorescence is preliminarily calculated (first step). Next, the plant in a state to be monitored is temporarily set to a carbon dioxide atmosphere and irradiated with exciting light to detect fluorescence generated from the irradiated part with exciting light (second step). Next, by comparing the correlation calculated in the first step with the detection result of the second step, the state of the plant is discriminated (step 3). By this method, the state of the plant can be monitored.

Description

[Detailed description of the invention]

0001

TECHNICAL FIELD The present invention relates to a method for monitoring the health and growth status of living plants.

0002

[Prior Art] The health condition and growth condition of plants change depending on temperature, sunlight intensity, etc., and also due to diseases, pests, etc. Therefore, in order to grow plants well, it is necessary to monitor their condition and control the growing environment according to the results.

0003

[Problems to be Solved by the Invention] However, it is generally extremely difficult to quickly and accurately monitor the health status of plants.

[0004] For example, if the temperature is too low to provide good growth conditions, it is difficult to determine unless the growth is actually observed to be sufficient, and accurate monitoring cannot be performed unless the growth results are observed. The same is true for illnesses, which are difficult to identify unless symptoms actually appear. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method that can accurately and quickly monitor the health status and growth status of plants, even when there are subtle changes.

[0005]

[Means for Solving the Problems] The method for monitoring the condition of plants according to the present invention is a method for monitoring living plants by controlling temperature, humidity,
The plants are grown under many types of growth environments with different amounts of sunlight, etc., and the plants are temporarily set in a carbon dioxide atmosphere during growth to detect the fluorescence generated from the area irradiated with excitation light. The first step is to determine the correlation between the light detection results in advance, and the plant to be monitored is temporarily set in a carbon dioxide atmosphere, and while the excitation light is irradiated, the plant that is in the state to be monitored is irradiated with the excitation light. A second step of detecting fluorescence, and a third step of determining the state of the plant by comparing the correlation obtained in the first step with the detection result in the second step. Features.

[0006]

[Operation] According to the present invention, in the first step, fluorescence in a carbon dioxide atmosphere is detected for plants in various states. Then, the relative relationships between the various states described above and the fluorescence detection results are determined in advance and recorded.

[0007] In the second step, fluorescence is detected for monitoring, and in the third step, the above-mentioned relative relationship is compared. Therefore, it is easy to determine which state the plant to monitor is closest to.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 conceptually illustrate the monitor situation. Now, as shown in FIG. 1, a large number of pots 11 are placed in an environment such as a greenhouse, in which sample plants 12 for monitoring growth and health conditions and cultivated plants 13 for use in agricultural production activities are placed. Suppose that is being grown. It is assumed that the inside of the greenhouse is controlled under predetermined conditions such as temperature, humidity, amount of fertilizer, and sunlight.

[0010] For monitoring, a transparent container 21 as shown in the figure is prepared, and the sample plant 12 is periodically sealed in it. The container 21 has a gas supply port 22 and a gas discharge port 23.
A pure carbon dioxide atmosphere is created inside the container 21 through this.

Further, an excitation light source 25 connected to a light source driving device 24 and a photodetector 26 for detecting fluorescence generated from the sample plant 12 are attached to the container 21, and the photodetector 26 outputs a detection output. It is connected to a recorder 27 for recording.

[0012] In order to monitor the condition of plants using the above-mentioned device, the first step is to record fluorescence while changing the environment in various ways. For example, the sample plants 12 are grown at various temperatures such as 15°C, 17°C, 19°C, and 21°C, and the conditions shown in FIG. 2 are set for the sample plants 12 in the growth environment at each temperature. . That is, excitation light is irradiated from the excitation light source 25 while the sample plant 12 is placed in a pure carbon dioxide atmosphere. Then, the fluorescent light is detected by the photodetector 26 and recorded on the recorder 27. This record is also made after the supply of carbon dioxide gas is stopped. This record is performed for each temperature, and also when the amount of sunlight, water supply, amount of fertilizer applied, etc. are changed. While making such records regularly, the sample plants 12 are grown and their health and growth conditions are observed. By summarizing the results, the relative relationship between the plant's condition and the intensity and time change of the fluorescent light can be determined.

Next, as a second step, fluorescence detection for monitoring is performed, and as a third step, actual monitoring is performed. That is, a sample plant 12 in a state to be monitored is set as shown in FIG. 2, and fluorescence is detected. This detection result is then compared with the relative relationship obtained in the first step. As a result, it becomes clear what kind of condition the sample plant 12 is in, and this is thought to be the same for the cultivated plant 13, so the temperature and amount of water supplied are controlled to create conditions suitable for growth. .

According to the above method, subtle changes in the condition of plants can be monitored extremely sensitively. This is because carbon dioxide gas and excitation light are the sources of plants' original life activity, that is, photosynthesis, and fluorescence is produced as a byproduct of this photosynthetic cycle. Since photosynthesis is greatly influenced by whether the plant is healthy or not, information for monitoring the plant can be obtained by detecting fluorescence. For example, as shown in FIG. 3, the period T1 to T2 is
When carbon dioxide gas is supplied to the plant, when the plant is in an unhealthy state, photosynthesis is low, and the change in fluorescence intensity over time becomes like the solid curve A. On the other hand, when plants are in normal conditions, the dotted line shows curve B, and when plants are in particularly good conditions, photosynthesis is active and the fluorescence intensity is shown as dotted line curve C. become that way.

[0015]

[Effects of the Invention] As explained above in detail, the monitoring method of the present invention detects fluorescence caused by excitation light in a carbon dioxide atmosphere, and uses this as reference data to correlate with the predetermined correlation. We compare them and monitor their health and growth status. In this case, since the fluorescence emitted from plants is a byproduct of the photosynthetic cycle, which is the life activity of plants, even extremely subtle changes in state can be determined quickly and accurately.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing how the condition of plants is monitored.

FIG. 2 is a diagram showing a device for monitoring the condition of plants.

FIG. 3 is a diagram showing changes in fluorescence intensity depending on the state of plants.

[Explanation of symbols]

11...pot 12...Sample plants 21...Container 22...Gas supply port 23...Gas exhaust port 25...Excitation light source 26...Photodetector

Claims (1)

[Claims] [Claim 1] Living plants are grown under various growth environments with different temperatures, humidity, amount of sunlight, etc., and during growth, the plants are temporarily set in a carbon dioxide atmosphere and irradiated with excitation light. The first step is to detect the fluorescent light generated from the irradiated part of the excitation light and find the correlation between the type of growth environment and the detected fluorescent light in advance, and to temporarily detect the plant in the state to be monitored. A second step of detecting fluorescence generated from the irradiated part of the excitation light while setting it in a carbon dioxide atmosphere and irradiating the excitation light; A method for monitoring the condition of a plant, comprising: a third step of determining the condition of the plant by comparing the detection results.