JP2010046052A - Method for raising or maintaining moss - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for raising or maintaining moss capable of reducing stress related to water. <P>SOLUTION: This method for raising or maintaining moss includes supplying water to the moss so as to bring a moisture content of the moss to 1-5 times the dry weight of the moss. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for growing or maintaining moss that is promising as a greening material for artificial ground by buildings.

  Recently, global warming due to increased use of fossil fuels has become apparent, and in parallel, the heat island phenomenon has become serious in urban areas. As one of the solutions to these problems, urban greening has been proposed, but the ground that can be greened is limited in urban areas. For this reason, it has been studied to cover artificial ground such as rooftops and wall surfaces of buildings with plants and increase plants in urban areas.

  The moss such as Snagoke (Rhacomitium Canescens) is recently attracting attention as a greening material for rooftops and walls of buildings because of its high elasticity and excellent drying resistance (Patent Document 1). Patent Document 2).

However, even if moss is planted on the rooftop or wall of a building, if the management is not carried out properly, the intended effect cannot be obtained. It is not well established. Moreover, as a biological characteristic of moss, it does not require soil, so it cannot be used by known irrigation means.
JP2007-111031 JP2007-202471A

  This invention is made | formed in view of this problem, Comprising: It provides the moss cultivation or maintenance method which can reduce water-related stress as the main desired subject.

  Unlike fern and seed plants that absorb water through the roots, moss that does not have vascular bundles absorbs water from the surface of the body, so it is not necessary to grow on a substrate that has water absorption, such as soil. It is possible to grow by fixing to an unsupported support. As such a support, for example, a net formed by knitting resin fibers, a resin thread-like body entangled into a plate-like body, a resin frame made by injection molding or the like, or those The thing etc. which combine these are mentioned. When moss is grown by being fixed to such a support, all the increase in weight due to water supply corresponds to the amount of water absorbed by the moss itself.

  Although it is known that moss can absorb water up to about 8 times its dry weight, the present inventor has intensively studied and the water content of moss is about 1 to 5 times its dry weight (1 From 0.0 to 5.0 g (moisture content) / g (moss dry weight)), the water-related stress of moss was found to be minimized, and the present invention was completed.

  That is, the moss growing or maintenance method according to the present invention is characterized by adjusting water supply (irrigation) to the moss so that the moisture content of the moss is 1 to 5 times its dry weight.

  If it is such, since the moss can be grown or maintained in a state where water-related stress is reduced, the moss can be maintained in a good state both physiologically and aesthetically.

  The moss may be either microbial or aseptic, and is not particularly limited as long as it is a moss grown in a nutrient solution and having regenerated buds around the gametophyte. Plants are preferred.

  Examples of the moss include Snagoke, Hyosnagoke, Ezosagogoke, Shimofurigoke, Black Kawagogoke, Kisunagoke, Himesagogo, Miyamasunago, Nagaenosago, etc. , Sphagnum moss, Ezo cynoboke, Chaobushi noboke, Chaboshi noboke, etc. (Thuidium B.S.G.), Koyano Mannengsa, Fusoso, etc., Climacium Web et Mogo Shippogoke, Chashippogoke, Chishima Shippogoke, Ao Shippogoke, Namishippogoke, Nagashippogoke, Himekajigogoke, Cockamok Jigoke, Takanejigogoke, Fujisipokegoke, Kasugojigoke, Nasippogoke, etc. Examples of the moss include Rhygogonium Brid., And the like, and the like, such as the moss genus (Rhizogonium Brid.) And the like, such as the moss genus (Hypnum Hedw.), Heteroscyphus S, such as Tsukushi scale moss, scale mushrooms, scale mushrooms, crested moss, marbasomokome moss, amanoko moss Hiffn.), Kuramagomodoki, Kaharkuramagokemodoki, Tosamamagokemodoki, Himekuramagokemodoki, Yamatokuradokemodoki, Nagabamakuradokemodoki, Okuramagokemodoki, Nisbikikadokemodoke, L ), Yamatom chinoke, Yoshina gum chinoke, Fourimuchigoke, Ezomuchigoke, Tamagobumuchigoke, Futabumuchigoke, Salamander pokeweed, Yamamuchigoke, Muchigoke, Kochigoke, Maebara Migoke, and the like.

  Among these moss plants, those categorized as snags (Rhacomitium Canescens) such as snags, hysnagos, and ezosnagos are suitable for greening the building surface. This moss does not require a water-absorbing substrate or nutrients to grow, and can survive in a very dry condition without overloading the building surface.

  And when the moss is snail, the water content of snag is 1.5 to 3 times its dry weight (1.5 to 3.0 g (water content) / g (snoke dry weight)), It is preferable to supply water to Snago.

  As a device for supplying water to the moss so as to have such a water content, since the moss absorbs water from the body surface, it is preferable to supply water from the surface (leaf) side rather than supplying from the bottom surface (root) side. Also, for example, when planting moss such as snails on the wall of a building, these moss are highly water-absorbing. There is a problem that water does not reach the moss in the area. For this reason, when supplying water to the moss planted on the wall surface of the building, it is preferable to use a water supply device that supplies water so as to spray from the surface. For this reason, it is preferable that the moss water supply device includes a sprinkler for spraying mist-like water. Such a moss water supply apparatus is also one aspect of the present invention. Such a moss water supply device is not limited to being used when supplying water to moss planted on the surface of a building, but can be used at all stages of growth. It can also be used when acclimatizing (primary acclimatization) or when moss communities that have undergone primary acclimatization are acclimatized outdoors (secondary acclimatization).

  The moss water supply apparatus according to the present invention preferably further includes a moving mechanism for moving the watering device on the surface of the building when supplying water to moss such as snails planted on the wall surface of the building.

  The present inventor has also found that, in moss, its water content, CWSI (Crop Water Stress Index) and color have a high correlation, and based on this finding, the following moss water content measuring device is provided. completed. That is, the moss moisture content measuring device includes a moss surface temperature sensor, an atmospheric temperature sensor, a moss surface temperature measured by the moss surface temperature sensor, and a difference between the atmospheric temperature measured by the atmospheric temperature sensor. And a water content calculation unit that calculates the water content of moss from the difference between the moss surface temperature and the atmospheric temperature calculated by the temperature difference calculation unit. To do. Further, a color ratio for calculating a ratio of the pixel intensity of the red bandwidth, the pixel intensity of the green bandwidth, or the pixel intensity of the blue bandwidth in the visible image sensor and the visible image of the moss surface captured by the visible image sensor. A water content calculation unit, the difference between the moss surface temperature calculated by the temperature difference calculation unit and the atmospheric temperature, and the red bandwidth calculated by the color ratio calculation unit. It is preferable to calculate the moisture content of moss from the ratio of the pixel intensity, the pixel intensity of the green bandwidth, or the pixel intensity of the blue bandwidth. The moss water content measuring device is also one aspect of the present invention, and is suitably used when calculating an appropriate amount of water supply to moss.

CWSI is an index represented by the formula (1).
CWSI = (dT−dTl) / (dTu−dTl) (1)
In the formula (1), dT is an actual measured value of the difference between the plant surface temperature and the atmospheric temperature, dTu is a difference (upper limit) between the plant surface temperature and the atmospheric temperature of a plant that does not evaporate, and dTl is given sufficient water. The difference (lower limit) between the plant surface temperature and the atmospheric temperature of each plant is shown.

The ratios r, g, and b of the pixel intensity R of the red bandwidth, the pixel intensity G of the green bandwidth, and the pixel intensity B of the blue bandwidth are expressed by equations (2) to (4). The
Ratio of red pixel intensity R r = R / (R + G + B) (2)
Green pixel intensity G ratio g = G / (R + G + B) (3)
Blue pixel intensity B ratio b = B / (R + G + B) (4)

  As shown in FIG. 6 (in the figure, ◆ represents an r ratio, ● represents a g ratio, ▲ represents a b ratio, and x represents CWSI). Increases to a water content of 1.5 g / g, is approximately constant from 1.5 to 3.0 g / g and then decreases, b is the opposite. On the other hand, CWSI generally varies in inverse proportion to the water content, decreases to 3.0 g / g, and thereafter becomes substantially constant. Thus, in moss, CWSI and color ratios r, g, and b have a high correlation with water content, and by combining CWSI (temperature difference) and color ratios r, g, and b, low water content is increased to high content. It turns out that the water content of moss can be calculated over the amount of water.

  In addition, when measuring the water content of snail, the low water content can be calculated only by CWSI (temperature difference), but the high water content cannot be calculated, and only the color ratios r, g, and b are used. Since it is not possible to distinguish between a drought state (low water content) and a saturated water state (high water content), in order to calculate the water content over a wide range, the temperature difference (CWSI) and the color ratios r, g, b And both are necessary.

  The moss surface temperature sensor is preferably an infrared sensor in order to measure the moss surface temperature without contact.

  Moreover, a moss water supply system can be constructed by combining the moss water content measuring device and the water supply device. As such a moss water supply system, for example, a moss surface temperature sensor, an atmospheric temperature sensor, a moss surface temperature measured by the moss surface temperature sensor, and an atmospheric temperature measured by the atmospheric temperature sensor A temperature difference calculation unit that calculates a difference, a moisture content calculation unit that calculates a moisture content of moss from a difference between the moss surface temperature and the atmospheric temperature calculated by the temperature difference calculation unit, and mist-like water are sprayed A sprinkler, a moving mechanism for moving the sprinkler over the surface of a building, a sprinkling amount calculation unit that calculates a sprinkling amount based on a moss water content calculated by the water content calculation unit, and the sprinkling unit The thing provided with the sprinkler control part which produces a control signal based on the sprinkling amount computed in the water amount calculation part, and outputs it to the sprinkler is mentioned. The moss water supply system is also one aspect of the present invention.

  In order to calculate an appropriate amount of water supply to Snagoke using the moss water supply system according to the present invention, it is only necessary to measure the water content in a drought state (less than 1.5 to 3.0 g / g). The color ratios r, g, and b may not be calculated.

  However, when it is necessary to supply water to the moss, and to grasp the water content of the moss in a wide range from a low water content to a high water content, a visible image sensor and a moss surface photographed by the visible image sensor are further provided. A color ratio calculation unit that calculates a ratio of a pixel intensity of a red bandwidth, a pixel intensity of a green bandwidth, or a pixel intensity of a blue bandwidth in a visible image, and the water content calculation unit includes: The difference between the moss surface temperature calculated by the temperature difference calculation unit and the atmospheric temperature, and the pixel intensity of the red bandwidth, the pixel intensity of the green bandwidth, or the pixel of the blue bandwidth calculated by the color ratio calculation unit It is preferable to calculate the moisture content of the moss from the strength ratio. If it is such, when Snagoke is made into water supply object, water content can be calculated over a wide range.

  According to the present invention having such a configuration, it is possible to grow or maintain moss including snails while maintaining a physiological and aesthetically favorable state.

  An embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the moss water supply system 1 according to the present embodiment includes a moss surface temperature sensor 2, an atmospheric temperature sensor 3, a visible image sensor 4, and a calculation unit 5. A measuring device 10, a water supply device 6, and a control device 7 are provided.

  Each part is described in detail below. The moss surface temperature sensor 2 includes, for example, an infrared sensor provided with a thermopile, and detects infrared rays emitted from the moss surface to measure the moss surface temperature.

  The atmospheric temperature sensor 3 includes, for example, a thermistor, and measures the atmospheric temperature by changing an electric resistance value according to a temperature change.

  The visible image sensor 4 is composed of, for example, a CMOS image sensor, and acquires a visible image obtained by photographing the moss surface.

  The calculation unit 5 is configured by a digital or analog electric circuit having a CPU, a memory, an A / D converter, a D / A converter, and the like, and may be dedicated or partly or entirely. Alternatively, a general-purpose computer such as a personal computer may be used. Further, it may be configured such that the functions of the respective units are achieved by using only an analog circuit without using a CPU, and need not be physically integrated, but includes a plurality of devices connected to each other by wire or wirelessly. It may be a thing.

  Then, by storing a predetermined program in the memory and causing the CPU and its peripheral devices to cooperate with each other according to the program, the calculation unit 5 performs the temperature difference calculation unit 51, the color ratio calculation unit 52, and the water content calculation unit 53. It is comprised so that the function as may be demonstrated at least.

  The temperature difference calculation unit 51 calculates a difference between the moss surface temperature acquired by the moss surface temperature sensor 2 and the atmospheric temperature acquired by the atmospheric temperature sensor 3.

  The color ratio calculation unit 52 is a ratio r of the pixel intensity R of the red bandwidth, the pixel intensity G of the green bandwidth, or the pixel intensity B of the blue bandwidth in the visible image of the moss surface photographed by the visible image sensor 4. g and b are calculated according to the above formulas (2) to (4).

  The water content calculation unit 53 includes the difference between the moss surface temperature calculated by the temperature difference calculation unit 51 and the atmospheric temperature, the pixel intensity R of the red bandwidth calculated by the color ratio calculation unit 52, and the pixel of the green bandwidth. The moisture content of moss is calculated by applying predetermined arithmetic processing to the ratios r, g, and b of the intensity G or the pixel intensity B of the blue bandwidth.

  As shown in FIG. 2, the water supply device 6 includes a sprinkler 61 that sprays mist-like water on the moss planted on the wall surface of the building B. The sprinkler 61 is a rail member. 62 (corresponding to a moving mechanism) is supported so as to be slidable in the vertical direction on the wall surface of the building. In addition, the moss water content measuring device 10 is fixed to the water sprinkler 61 so that it can be slid in the vertical direction on the wall surface of the building B together with the water sprinkler 61 and can also be slid in the horizontal direction.

  The control device 7 is constituted by a digital or analog electric circuit having a CPU, a memory, an A / D converter, a D / A converter, and the like, and may be dedicated or partly or entirely. Alternatively, a general-purpose computer such as a personal computer may be used. Further, it may be configured such that the functions of the respective units are achieved with only an analog circuit without using a CPU, and need not be physically integrated, but includes a plurality of devices connected to each other by wire or wirelessly. It may be a thing.

  Then, by storing a predetermined program in the memory and operating the CPU and its peripheral devices in cooperation with each other according to the program, the control device 7 exhibits at least functions as a sprinkling amount calculation unit 71 and a sprinkler control unit 72. It is comprised so that it may do.

  The sprinkling amount calculation unit 71 calculates a sprinkling amount by performing predetermined arithmetic processing on the moss water content calculated by the water content calculation unit 53. Specifically, when the moss to be sprinkled is snail, the target water content is set so that the water content of snag is 1.5 to 3 times its dry weight, and the target water content and water content are set. The difference from the current water content calculated by the calculation unit 53 is calculated as the watering amount.

  The sprinkler control unit 72 acquires the sprinkling amount calculated by the sprinkling amount calculation unit 71 and outputs a control signal created based on the sprinkling amount to the sprinkler 61.

  Next, a method for supplying water to the moss planted on the wall surface of the building using the moss water supply system 1 will be described with reference to the flowchart of FIG.

  First, the moss surface temperature sensor 2 measures the surface temperature of the snail, and the atmospheric temperature sensor 3 measures the atmospheric temperature (step S1).

  Next, the temperature difference calculation unit 51 acquires snag surface data from the moss surface temperature sensor 2, acquires air temperature data from the air temperature sensor 3, and calculates the difference between the surface temperature of the snag and the air temperature. Calculate (step S2).

  Further, the visible image sensor 4 captures a visible image of the surface of the snag (step S3).

  Next, the color ratio calculation unit 52 acquires the visible image data captured by the visible image sensor 4, and the pixel intensity R of the red bandwidth, the pixel intensity G of the green bandwidth, or the pixel intensity B of the blue bandwidth. The ratios r, g, and b are calculated (step S4). Here, the ratio of pixel intensity may be calculated for the bandwidth of any one of red, green, and blue, and may be calculated for the bandwidth of any two or three colors, Observation in combination with a change in pixel intensity in the red or green and blue bandwidth is preferable in order to more accurately grasp the change in the physiological state of the snail.

  Among these steps S1 to S4, steps S3 to S4 are not essential to calculate the watering amount, but if both steps S1 to S2 and steps S3 to S4 are performed, the water content can be increased over a wide range. Can be calculated.

  Subsequently, the water content calculation unit 53 acquires the difference data between the surface temperature of the snail and the atmospheric temperature from the temperature difference calculation unit 51, and the pixel intensity R of the red bandwidth and the pixel of the green bandwidth from the color ratio calculation unit 52. The ratio r, g, b data of the intensity G or the pixel intensity B of the blue bandwidth is acquired, and a predetermined calculation process is performed to calculate the water content of snags (step S5).

  Next, the watering amount calculation unit 71 adjusts the watering amount based on the water content of the snorkel calculated by the water content calculation unit 53 so that the water content of the snorkel is 1.5 to 3 times its dry weight. Calculate (step S6).

  Subsequently, the sprinkler control unit 72 acquires the sprinkling amount data from the sprinkling amount calculation unit 71, creates a control signal having the sprinkling amount, and outputs the control signal to the sprinkler 61 (step S7). At this time, when the watering amount calculated in step S6 is not 0 (when the water content is less than 1.5 to 3.0 g / g), the process proceeds to step S8, and when the watering amount is 0 (water content) Is 1.5 to 3.0 g / g or more), the process proceeds to step S9.

  The water sprinkler 61 that has received the control signal sprays a predetermined amount of water on the snag (step S8).

  When the sprinkling of snag at the predetermined location is completed, the sprinkler 61 to which the moss water content measuring device 10 is fixed moves by a predetermined distance (step S9), and the operation from step S1 is repeated.

  Therefore, if the moss water supply system 1 having such a configuration is used when growing or maintaining moss including snails, water supply can be performed while measuring the moisture content of the moss. The amount of water can be maintained in an optimal state, and moss can be cultivated or maintained in a state where water-related stress is reduced. For this reason, moss can be maintained in a favorable state both physiologically and aesthetically.

  The present invention is not limited to the above embodiment.

  For example, the control device 7 and the moss water content measurement device 10 may be separate, but the control device 7 and the moss water content measurement device 10 may be integrated.

  Further, the moss water content measuring device 10 may not be fixed to the water sprinkler 61, and the moss water content measuring device 10 itself may be provided with a moving mechanism.

  The application target of the moss water supply system 1 is not limited to snago, and various moss can be targeted.

  In addition, the present invention is not limited to the above-described embodiments, and may be configured by appropriately combining some or all of the various configurations described above without departing from the spirit of the present invention.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

  A non-contact two-dimensional radiation thermometer iSquare ii-1064 (101 in the figure) manufactured by HORIBA, Ltd. is used as a visible image sensor and a plant surface temperature sensor, and T & D is used as an atmospheric temperature sensor and other contact temperature sensors. Using a temperature / humidity data logger TR-71U (102 in the figure) manufactured by NK System Co., Ltd., installed in Biotron NC350 (103 in the figure), which is a cultivation chamber manufactured by NK System, and a test apparatus as shown in FIG. 100 was assembled.

The environment in the cultivation chamber 103 was set to an average light intensity of 86.54 μmols ⁻¹ m ⁻² (400 to 700 nm), an atmospheric temperature of 15 ° C., and a relative humidity of 60%, and the lighting was switched on / off every 12 hours. .

  As a test sample, Snagoke M growing on a glass wool medium having a size of 150 × 100 × 20 mm was used, and the water content was set to 5, 4, 3, 1 every day for 6 days during the test period. The test was carried out at 0.5, 0.5 and 0.1 g / g. In addition, no nutrient was given to the test sample.

<Measurement of infrared emissivity from the surface of Snagoke>
A background mirror 104 was installed in the cultivation chamber 103, the emissivity of the non-contact two-dimensional radiation thermometer 101 was set to 1, and temperature data was collected every 15 minutes for 24 hours. On the other hand, the snag M supplied with 5 times the dry weight of water is left in the daily cultivation chamber 103, the background mirror 104 is removed on the second day, and the snag M is compared with the snago M every 15 minutes for 6 days. Temperature data was acquired from 105. During the test, the water state of Snagoke M was first calculated every day using a computer, and water was replenished to reach the set water content. From the obtained temperature data, the infrared emissivity of Snagoke M was measured using Equation (5).

e _ms = {(T ⁴ _{e = 1, ms} −T ⁴ _back ) / (T ⁴ _{e = 1, ref} −T ⁴ _back )} e _ref (5)
In equation (5), e _ms represents the infrared emissivity of the surface of Snagoke M, T ⁴ _{e = 1, ms} represents the infrared radiation temperature of the surface of Snagoke M painted black, and T ⁴ _{e = 1, ref} represents the comparative radiation. Represents the infrared radiation temperature of the body 105, T ⁴ _back represents the background temperature measured by the background mirror 104, and e _ref represents the infrared radiation emissivity of the comparative radiator 105. The results are shown in Table 1.

<Measurement of CWSI>
After supplying water of 5 times the dry weight to Snago M and acclimatizing in chamber 103 for 1 day, infrared image and visible image of Snago M and comparative radiator 105 are simultaneously displayed every 15 minutes for 6 days. I took a picture. During the test, the water state of Snagoke M was seriously measured every day, and water was replenished to reach the set water content. The emissivity of the non-contact two-dimensional radiation thermometer 101 was set to 1, and the temperature was recorded simultaneously with imaging. Using the temperature data of each instantaneous field of view (IFOV) of the non-contact two-dimensional radiation thermometer 101, the apparent temperature of the snag M and the comparative radiator 105 is calculated by a computer using Equation (6) and Equation (7). did.

^{_{T IR, ms = [{T}} 4 e = 1, ms - (1-e ms) T 4 back} / e ms] 1/4 ··· (6)
T _{IR, ref} = [{T ⁴ _{e = 1, ref−} (1−e _ref ) T ⁴ _back } / e _ref ] ^1/4 (7)
In formula (6), T _{IR, ms} represents the apparent infrared radiation surface temperature of Snagoke M, and in formula (7), T _{IR, ref} represents the apparent infrared radiation surface temperature of comparative radiator 105.

  The value obtained by equation (6) was corrected using equation (7), and the final temperature was calculated by equation (8).

_{TF, ms} = _{TIR, ms-} ( _{TIR, ref} - _{TDC, ref} ) (8)
In Formula (8), T _{F, ms} represents the final temperature (° C.) of the surface of Snago M, and T _{DC, ref} represents the contact temperature (° C.) of the comparative radiator 105.

  The daily CWSI was calculated from the above equation (1) using the daily average temperature of the surface of Snago M obtained in Equation (8) and the daily average atmospheric temperature in the cultivation chamber 103. The results are shown in FIG. In FIG. 5, + represents the atmospheric temperature in the cultivation chamber 103, ◆ represents the surface temperature of the snail M, and ▲ represents CWSI.

<Measurement of RGB ratio>
Visible images of Snago M were processed with Image J software (National Institutes of Health) to calculate the daily average r, g, b ratio. A region of interest (ROI) was selected, cut out, resized to 120 × 96 pixels, and histogram flattened in advance. ROI was selected as the image area on the surface of Snagoke M. The lower ROI image was created by cutting out and changing the size for superimposing. To improve contrast, histogram flattening was performed to redistribute image pixel intensity. The RGB ratio was calculated by a computer using the above formulas (2) to (4). The results are shown in Table 2 and FIG. In FIG. 6, ♦ represents the r ratio, ● represents the g ratio, ▲ represents the b ratio, and x represents CWSI.

<Result>

As shown in Table 1, the infrared emissivity _{e ms} of Sunagoke M surface of the test sample was in the range of 0.79 to 1.0 in the water content of 0.1 to 5.0 g / g. The infrared emissivity on the surface of Snagoke M of the test sample generally increased as the water content decreased, but was constant in the range of the water content of 1.5 to 3.0 g / g.

  FIG. 5 shows the results for 3 days in the latter half of the test. The surface temperature and CWSI of Snago M increased in inverse proportion to the water content. There were no noticeable changes in these values for the first three days of the test. CWSI generally increased with the surface temperature of Snagoke M. However, deviations due to variations in the physiological changes of Snagoke M during the light and dark periods were observed. Also, the atmospheric temperature in the cultivation chamber 103 was almost uniform during the test.

  From Table 2, all color ratios showed a critical point on the third day, r and g increased until the third day, decreased after becoming substantially constant, and b was the opposite. FIG. 6 shows that the ratio of r and g increases up to a water content of 1.5 g / g, is substantially constant at 1.5 to 3.0 g / g, and then decreases. b was the opposite. On the other hand, CWSI generally changed in inverse proportion to the water content.

In addition, a coefficient of determination of R ² = 0.85 was calculated from the primary regression of CWSI and water content, and R ² = 0.99 was calculated when the data was regressed as a quadratic polynomial. Therefore, it was found that there is a high correlation between CWSI and water content. From these, it is surmised that Snagoke M showed water-related stress at a set water content below 1.5 g / g and above 3.0 g / g.

FIG. 7 shows the RGB ratio as a CWSI quadratic polynomial function. In FIG. 7, ◆ represents the r ratio, y = −0.0045x ² + 0.0278x + 0.337, R ² = 0.71, and ■ represents the g ratio, y = −0.0064x ² + 0.047x + 0.296. , R ² = 0.56, and ▲ represents the b ratio, y = 0.0109x ² -0.0725x + 0.367, R ² = 0.62. Therefore, it was found that the color ratio and CWSI have a high correlation.

  These results show that CWSI is an excellent indicator of snail drought stress, and the color ratio shows a high correlation with CWSI, indicating that the color ratio can also be used to detect water stress in plants. It was. Further, FIG. 6 shows that CWSI is effective only when detecting snail drought stress, but the color ratio can be an indicator of water-related stress of both excess water and drought. And it is speculated that snags are biophysically relaxed when the water content is between 1.5 and 3.0 g (water content) / g (snoke dry weight), and the water content of snago is 1 of its dry weight. It turned out that it is physiologically and aesthetically preferable to supply water so that it may become 5 to 3 times.

  The typical block diagram of the moss water supply system in one Embodiment of this invention.   The perspective view of the water supply apparatus in the embodiment.   The flowchart which shows the water supply method to Snagoke in the embodiment.   The schematic block diagram of the test apparatus used in the Example.   The graph which shows the change of CWSI in an Example.   The graph which shows the change of RGB ratio in an Example.   The graph of RGB ratio as a CWSI quadratic polynomial function in an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Moss water supply system 10 ... Moss moisture content measuring device 2 ... Temperature sensor 3 for moss surface ... Temperature sensor 4 for atmosphere ... Visual sensor 51 ... Temperature difference calculation part 52- .... Color ratio calculation unit 53 ... water content calculation unit 6 ... water supply device 61 ... sprinkler 62 ... moving mechanism (rail member)
71 ... sprinkling amount calculation part 72 ... sprinkler control part

Claims (10)

  A moss growing or maintenance method for supplying water to the moss so that the moisture content of the moss is 1 to 5 times its dry weight.   The method for cultivating or maintaining moss according to claim 1, wherein water is supplied to the snail so that the water content of the snag is 1.5 to 3 times its dry weight.   A moss water supply device that supplies water to the moss so that the moisture content of the moss is 1 to 5 times its dry weight.   The moss water supply apparatus of Claim 3 provided with the water sprinkler which spreads mist-like water.   The moss watering device according to claim 3 or 4, comprising a moving mechanism for moving the watering device on the surface of a building. A moss surface temperature sensor;
An atmospheric temperature sensor;
A temperature difference calculation unit that calculates a difference between the moss surface temperature measured by the moss surface temperature sensor and the atmospheric temperature measured by the atmospheric temperature sensor;
A moss moisture content measuring device, comprising: a moisture content calculator for calculating a moisture content of moss from a difference between the moss surface temperature and the atmospheric temperature calculated by the temperature difference calculator. A visible image sensor;
A color ratio calculation unit that calculates a ratio of a pixel intensity of a red bandwidth, a pixel intensity of a green bandwidth, or a pixel intensity of a blue bandwidth in a visible image of a moss surface photographed by the visible image sensor. And
The water content calculation unit includes a difference between the moss surface temperature and the atmospheric temperature calculated by the temperature difference calculation unit, a pixel intensity of the red bandwidth, and a pixel intensity of the green bandwidth calculated by the color ratio calculation unit. The moss water content measuring device according to claim 6, wherein the moss water content is calculated from a pixel intensity ratio of a blue bandwidth.   The moss moisture content measuring device according to claim 6 or 7, wherein the moss surface temperature sensor is an infrared sensor. A moss surface temperature sensor;
An atmospheric temperature sensor;
A temperature difference calculation unit that calculates a difference between the moss surface temperature measured by the moss surface temperature sensor and the atmospheric temperature measured by the atmospheric temperature sensor;
From the difference between the moss surface temperature calculated by the temperature difference calculator and the atmospheric temperature, a moisture content calculator that calculates the moisture content of the moss,
A sprinkler for spraying mist-like water;
A moving mechanism for moving the watering device over the surface of the building;
Based on the water content of the moss calculated by the water content calculation unit,
A moss water supply system, comprising: a sprinkler control unit that creates a control signal based on the sprinkling amount calculated by the sprinkling amount calculation unit and outputs the control signal to the sprinkler. A visible image sensor;
A color ratio calculation unit that calculates a ratio of a pixel intensity of a red bandwidth, a pixel intensity of a green bandwidth, or a pixel intensity of a blue bandwidth in a visible image of a moss surface photographed by the visible image sensor. And
The water content calculation unit includes a difference between the moss surface temperature and the atmospheric temperature calculated by the temperature difference calculation unit, a pixel intensity of the red bandwidth, and a pixel intensity of the green bandwidth calculated by the color ratio calculation unit. The moss water supply system according to claim 9, wherein the moss water content is calculated from a pixel intensity ratio of a blue bandwidth.

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