JP3198946U - Agricultural covering material and agricultural house - Google Patents

Abstract

The present invention provides an agricultural covering material and an agricultural house for realizing safe flying of visiting insects, prevention of collision with a tent and active activity. An agricultural house is transparent to visible light, includes an ultraviolet scattering agent, and is configured to selectively scatter and transmit ultraviolet light that can be detected by a visiting insect. The covering material 1 was adopted. Since the agricultural house 100 constituted by the agricultural covering material 1 is recognized as a luminous body that diffuses ultraviolet light when viewed from the visiting insects 5, it is possible to reduce the possibility of the visiting insects 5 colliding. [Selection] Figure 1

Description

  The present invention relates to a crop cultivation technique using a visiting insect, and more particularly to an agricultural house where the visiting insect is released and an agricultural covering material used therefor.

  In recent years, agricultural houses (greenhouses, plastic houses, tunnel houses, etc.) in which a covering material is extended on a simple structure are widely used as means for cultivating crops. The agricultural house is not easily affected by the weather and the season, and the temperature and humidity of the field can be set as appropriate. Therefore, the growth of the crop can be promoted or suppressed, and the harvest time can be controlled.

  On the other hand, in the case of house cultivation, unlike open field cultivation, it is not possible to expect natural pollination of the petals of the crops, so it is necessary to disperse the visiting insects in the house and to carry out the pollination of the crops using the activities of the visiting insects. is there. The most common insects to visit are bees, and other examples include the spotted bee, the bee and the bumblebee. Examples of crops that use flower visiting insects include strawberries, melons, watermelons, peppers, and tomatoes.

  By the way, a resin film, a resin plate, a fiber reinforced plastic, a plate glass, or the like is adopted as the covering material. Generally, a resin film is widely used from the viewpoint of cost. Some of such resin films include an ultraviolet absorber and the like and have a function of blocking ultraviolet rays. A resin film having an ultraviolet blocking ability has advantages that it can reduce deterioration over time due to ultraviolet rays, and can suppress the activity of pests in the field, the propagation of pests or fungi.

  However, a resin film having an ultraviolet blocking ability cannot be applied to the cultivation of crops that use visiting insects. This is because visiting insects (typically bees) fly by sensing ultraviolet rays from the sun and lose their sense of balance and cannot fly normally in an environment where the ultraviolet rays are blocked. For bees and the like, the environment from which ultraviolet rays are removed is considered to be close to the dark environment for humans. Moreover, in an environment where the house is not sufficiently irradiated with ultraviolet rays, bees and the like cannot visually identify the position of the petals by visually recognizing the reflection of the ultraviolet rays hitting the petals, so that pollination becomes difficult.

  Furthermore, a resin film having an ultraviolet blocking ability is not preferable for the cultivation of colored crops (eg eggplant) that require ultraviolet rays for color development, and specific flower buds having purple or blue flowers.

  Therefore, resin films that transmit ultraviolet rays are also widely used for cultivation of agricultural crops (see, for example, Patent Document 1). The agricultural covering material described in Patent Document 1 is made of a fluororesin film, has an ultraviolet light transmitting ability, and does not limit the activities of visiting insects. Moreover, the agricultural covering material has a total light transmittance of 90% or more, and is excellent in transparency. For this reason, as in the outdoor environment, a sufficient amount of light reaches the house, and the growth of crops is promoted. Moreover, it is said that there is little deterioration by an ultraviolet-ray rather than resin films, such as a soft vinyl chloride resin and polyethylene.

  A resin film having a high scattered light transmittance has also been proposed (see, for example, Patent Document 2). The agricultural film described in Patent Document 2 improves the scattered light transmittance by containing muscovite or the like, thereby allowing light to diffuse into the house and reducing the shadow of the cultivation community. It is said that leaf burn prevention can be realized without hindering the growth of crops.

JP 2003-105104 A JP 2012-070707 A

  By the way, the bees diffused in the agricultural house are more exhausted and have a shorter lifespan than the bees raised outdoors. This is because the closed space in the house is a hot and humid and harsh environment for the bees diffused in the house.

  In addition, the inventor speculates that one of the factors that shorten the life of the bees is that the bees diffused in the house collide with the tent of the house. The visual organ of bees has a low resolution and is not good at grasping the sense of distance from the object, so it is difficult to recognize the presence of the covering material that is the awning of the house. In fact, it has often been observed that bees collide with the tent of the house and fall out of sight.

  Here, when the fluororesin film described in Patent Document 1 is used as an awning in an agricultural house, the fluororesin film realizes a total light transmittance including 90% or more. When the bees are dissipated in the house, the bees can sense a sufficient amount of ultraviolet light, and the flight behavior itself is not affected.

  However, since the fluororesin film has high transparency, there is a problem that the bees cannot avoid collision with the awning, and the frequency of collision with the awning becomes high and is consumed.

  In addition, when a part of the house is opened to prevent temperature rise or ventilation, once the bees go out of the house, the entrance of the house is not known, and it is possible to return to the nest box installed in the house. As a result, there also arises a problem that the group is reduced.

  In winter, in order to increase the heat insulation effect of the house, another awning is extended inside the awning to make the house a double structure. In this case, when the bees enter the space between the outer awning and the inner awning, there is a problem that they cannot escape from the space and cannot return to the nest box.

  For farmers, it is useful to use bees for pollination of crops, so there is a demand from beekeepers to borrow a nest box containing a group of bees. However, for beekeepers, as the problem pointed out above, honeybees are extremely consumed (sometimes annihilated), and this is a factor that hesitates to lend out the hives.

  Moreover, although the coating | covering material of patent document 1 is comprised from the fluororesin and has the tolerance with respect to an ultraviolet-ray, since the ultraviolet-ray which permeate | transmitted the film is directly irradiated in a house, materials, such as a plastic piping in a house There is also a problem of deterioration in a short period of time.

On the other hand, the agricultural film described in Patent Document 2 has a high dispersion light transmittance while securing a total light transmittance of nearly 90% by scattering of muscovite contained therein.
And since the film for agriculture of patent documents 2 has a haze value (cloudiness) of 15 to 40%, compared with patent documents 1, transparency is considered to be near white.

  However, when light in the range from ultraviolet light to visible light is uniformly scattered in the awning of the house, the bees still cannot avoid collision with the awning. From the viewpoint of the bees, it is thought that the tent (cover film) is assimilated to the cloudy color. In addition, for example, in vinyl chloride resin, there is also a finding that when the transparency decreases due to bleed-out of a plasticizer and the material changes from transparent to cloudy, the frequency of bee collision increases.

  The present invention has been made in view of the above problems, and provides an agricultural house and a covering material used for an agricultural house that realize safe flying of visiting insects, prevention of collision with a tent and active activity. The purpose is to do.

  In order to solve the above-described problems, the agricultural coating material of the present invention is an ultraviolet light diffusion material that diffuses ultraviolet light detected by photoreceptor cells on the short wavelength side of visiting insects on a substrate transparent to visible light. And means for transmitting ultraviolet light while being scattered by the ultraviolet light diffusion means.

  In addition, one of the agricultural coating materials of the present invention includes an ultraviolet light scattering agent that scatters ultraviolet light that is detected by a short-wavelength photoreceptor of a visiting insect in a resin film that is transparent to visible light. In addition, it is preferable to transmit ultraviolet light while scattering it with an ultraviolet light scattering agent.

  The average particle diameter of the ultraviolet light scattering agent is preferably 1/10 or less, more preferably 1/5 or less, of the peak wavelength of the short-wavelength photoreceptor cells of the visiting insect. The content of the ultraviolet light scattering agent is preferably 7 wt% or less, more preferably 5 wt% or less, and most preferably 3 wt% or less with respect to the resin constituting the agricultural coating material. .

  Another agricultural covering material of the present invention is a resin plate that is transparent to visible light, and has a fine concavo-convex structure that scatters ultraviolet light that is sensed by photoreceptors on the short wavelength side of visiting insects. The ultraviolet light may be scattered and transmitted by the fine concavo-convex structure.

  The agricultural house of the present invention is characterized by using the agricultural covering material. In the agricultural house, a region that does not scatter ultraviolet light may be provided.

  According to the present invention, since the agricultural covering material that diffuses and transmits ultraviolet light that can be detected by visiting insects is applied to the agricultural house, the visiting insects can recognize the covering material as an ultraviolet light emitter, Insects can be prevented from colliding with the covering material. Other effects will be described in a mode for carrying out the invention.

Schematic configuration diagram of the agricultural house of the present invention Schematic block diagram of the agricultural covering material of the first embodiment of the present invention Schematic block diagram of the agricultural covering material of the second embodiment of the present invention First application example of agricultural covering materials Second application example of agricultural covering materials Third application example of agricultural covering materials Fourth application example of agricultural covering materials

  Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following examples.

[Schematic configuration of agricultural house]
FIG. 1 is a schematic configuration diagram of an agricultural house 100 according to the present invention. The agricultural house 100 of the present invention is intended to prevent the visiting insects 5 from colliding with the ceiling or wall surface of the agricultural house 100 and is transparent to the visible light 3 in order to solve such problems. There is an agricultural covering material 1 configured to selectively scatter and transmit ultraviolet light 4 that can be detected by the visiting insect 5.

  The agricultural house 100 constituted by the agricultural covering material 1 of the present invention is recognized as a luminous body that diffuses ultraviolet light when viewed from the visiting insect 5, so that the possibility of the visiting insect 5 colliding is reduced. Can do.

  In the agricultural house 100, the agricultural covering material 1 is extended as a tent on the outside of a structure formed of aggregates (not shown). Inside the agricultural house 100, a picture box 50 for the visiting insects 5 is installed, and the visiting insects 5 are diffused. In the agricultural field of the agricultural house 100, a crop 6 that is pollinated and crossed using the activities of the visiting insects 5 is cultivated.

  Here, the visual organ of the flower visiting insect 5 (hereinafter, a bee) will be briefly described. A bee has three types of photoreceptors having peaks in the vicinity of 340 nm (ultraviolet light), 463 nm (blue), and 530 nm (green), and can sense light in a wavelength range of approximately 300 nm to 650 nm. On the other hand, humans have three types of photoreceptor cells having peaks in the vicinity of 420 nm (blue), 530 nm (green), and 560 nm (red and red), and sense light in the wavelength range of approximately 400 to 760 nm as visible light. can do.

  In other words, the wavelength range of light that can be detected by the bees is shifted by about 100 nm to the short wavelength side compared to the human visible light region, and the bees are ultraviolet light (300 nm to 400 nm) that cannot be detected as a color by humans. ) Can be perceived as some color.

  In the present invention, in consideration of the characteristics of the visual organ of the bee, the covering material 1 transmits visible light (400 nm to 760 nm) and selectively scatters ultraviolet light (300 nm to 400 nm). Configure. As will be described later with reference to FIG. 2 or FIG. 3, the covering material 1 includes a base material transparent to visible light 3 and ultraviolet light diffusing means for diffusing and transmitting ultraviolet light.

  The covering material 1 may or may not transmit infrared light (from 760 nm). The presence or absence of infrared light transmission can be appropriately set according to the crop to be cultivated. Since bees cannot sense infrared light (and red light), the presence or absence of infrared light or the like hardly affects the behavior of the bees.

  When the light from the sun S (including visible light 3 and ultraviolet light 4) is irradiated to the agricultural house 100, most of the visible light 3 is a transparent substrate (for example, see reference numeral 10 in FIG. 2). ) And visible transmitted light 30 (indicated by a dotted line in the figure) enters the field. As a result, a sufficient amount of light necessary for growing crops can be supplied into the agricultural house 100.

  Further, the ultraviolet light 4 is diffused in all directions by an ultraviolet light diffusing means (for example, reference numeral 12 in the figure) included in the base material, and a part of the diffused ultraviolet light is incident on the field as ultraviolet diffuse transmitted light 40. The other part is reflected to the outdoor side as ultraviolet diffuse reflected light 42.

  As a result, from the bee 5, the ultraviolet diffuse transmitted light 40 spreads uniformly in the coating material 1, so that the ultraviolet light is emitted from the coating material 1, and the coating material 1 emits ultraviolet light. It can be clearly recognized as a body. For this reason, possibility that the bee 5 will collide with the awning of the agricultural house 100 comprised with the covering material 1 can be reduced.

  Further, it is not necessary to diffuse all of the ultraviolet light 4 in the coating material 1, and a part of the ultraviolet light 4 may be incident on the field as the ultraviolet transmitted light 44 by appropriately adjusting the ultraviolet light diffusing means. In this case, since the bee 5 senses the ultraviolet light 4 from the sun S as it is, the direction and position of the sun S can be accurately recognized, and the flight is not hindered.

  When the ultraviolet diffuse transmitted light 40 and the ultraviolet transmitted light 44 are irradiated onto the petals 60 of the crop 6, the ultraviolet reflected light 46 is reflected from the petals 60. Since the ultraviolet reflected light 46 is strongly reflected at a specific portion of the petal 60, the bee 5 can recognize the specific portion as a pattern.

  In addition, since a certain proportion of the ultraviolet light 4 diffuses in the covering material 1, the plastic piping in the house has a short period of time compared to a conventional house using a transparent covering material having a high ultraviolet transmittance. It is possible to prevent the deterioration.

  In addition, UV light can be diffused in the house even under weather conditions where UV light irradiation is not sufficient, which can promote bee activities, especially in the cultivation of crops with a short flowering period. Failures and fruit failures can be reduced.

  In addition, although it is preferable that the coating | covering material 1 of this invention selectively diffuses only the ultraviolet light 4, depending on conditions, you may comprise so that a part of visible light 3 may be diffused. When the diffusion of the visible light 3 and the diffusion of the ultraviolet light 4 are mixed at a certain ratio, the bee 5 may perceive the covering material 1 as white. However, if the covering material 1 is not assimilated with the cloudy color, it is considered that the frequency of collision is not so high, so that part of the visible light 3 can be diffused.

[Embodiment 1]
FIG. 2 is a schematic configuration diagram of the agricultural covering material 1A according to the first embodiment of the present invention. As shown in FIG. 2, the agricultural covering material 1A of this example employs a resin film 10 as a base material and an ultraviolet light scattering agent 12 composed of a large number of nanoparticles as ultraviolet light diffusing means. . Since the covering material 1A of this example can be constituted by an inexpensive resin film, it is suitable for a simple agricultural house in which the awning is replaced every predetermined period.

  The resin film 10 is preferably transparent to visible light. Here, “transparent to visible light” means that the total light transmittance in visible light (400 nm to 760 nm) is 80% or more, preferably 85% or more. As a material of the resin film 10, it is preferable to employ a fluororesin having resistance to ultraviolet light. However, the present invention is not limited to this, and a vinyl chloride resin, a polyester resin, a polyolefin resin, and other appropriate resins can also be used.

  The ultraviolet light scattering agent 12 has a function of scattering ultraviolet light (300 nm to 400 nm) sensed by the bee 5 and, for example, nanoparticles such as titanium oxide, zinc oxide, zirconia, and calcium carbonate can be adopted. .

  When a bee is employed as a visiting insect, the range of ultraviolet light that can be detected by the bee is approximately 300 nm to 400 nm, and the peak wavelength of the short-wavelength side photoreceptor provided in the bee is approximately 340 nm.

  Therefore, the average particle diameter of the ultraviolet light scattering agent 12 is about 1/5 or less (about 70 nm or less) of the peak wavelength so that the ultraviolet light near the peak of the photoreceptor cell on the short wavelength side of the bee is best scattered. Preferably, the peak wavelength is approximately 1/10 or less (about 35 nm or less) of the peak wavelength. The average particle diameter is a volume average diameter of 100 or more primary particles, and can be measured using, for example, a transmission electron microscope or a scanning electron microscope.

  If the average particle diameter of the ultraviolet light scattering agent 12 is, for example, about 70 nm or less, the attenuation of the ultraviolet light becomes small and Rayleigh scattering becomes dominant, and a lot of ultraviolet light can be scattered. If the average particle size of the ultraviolet light scattering agent 12 is, for example, about 35 nm or less, Rayleigh scattering becomes more prominent, ultraviolet light can be selectively transmitted and scattered, and visible light scattering in the violet and blue regions is suppressed. Less.

  In addition, although the example which considered the bee was demonstrated above, the range of the average particle diameter of the ultraviolet-light-scattering agent 12 can be changed suitably according to the kind of visiting insect.

  The ultraviolet light scattering agent 12 is preferably distributed uniformly in the resin film 10. However, the present invention is not limited to this, and a region where the nanoparticle distribution density is locally high in the resin film 10 may be provided as necessary.

  In this case, such a region strongly scatters or reflects ultraviolet light strongly, so that a region with a high nanoparticle distribution density appears bright or dark from the bees. As a result, a pattern that can be recognized only by a bee that senses ultraviolet light can appear in the awning of an agricultural house, and a bee that has gone outdoors can easily return to the home using such a pattern as a landmark. .

  The content of the ultraviolet light scattering agent 2 is preferably 7 wt% or less, more preferably 5 wt%, based on the resin material constituting the resin film 10, although it depends on the condition of the average particle diameter. Most preferably, it is 3 wt% or less.

  When the content range of the ultraviolet light scattering agent 2 is 7 wt% or less, there is little possibility of affecting the strength, flexibility, and the like of the resin film 10. If it is 5 wt% or less, the transparency of the resin can be maintained, and there is little possibility of affecting the transmission of visible light. If it is 3 wt% or less, since the distribution density of the ultraviolet light scattering agent is small, the ratio of the diffuse reflection of the ultraviolet light in the resin film 10 is reduced, and the ultraviolet light can be diffused and transmitted efficiently. Further, in order to ensure a constant diffusion effect of ultraviolet light, the content range of the ultraviolet light scattering agent 2 is preferably at least 1 wt% or more.

  As shown in FIG. 2, when the visible light 3 is irradiated to the covering material 1A, most of the visible light 3 is transmitted through the resin film 10, and the visible transmitted light 30 is irradiated downward. When the ultraviolet light 4 is irradiated, the ultraviolet light 4 is diffused by the ultraviolet light scattering agent 12 included in the resin film 10, the ultraviolet diffuse transmitted light 40 is irradiated downward, and the ultraviolet diffuse reflected light 42 is reflected upward. A part of the ultraviolet light 4 is irradiated downward as ultraviolet transmitted light 44.

  FIG. 3 is a schematic configuration diagram of the agricultural covering material 1B according to the second embodiment of the present invention. The agricultural covering material 1B of this example employs a resin plate 14 as a base material and a fine uneven structure 16 as an ultraviolet light diffusion means. Since the covering material 1B of this example is durable and can protect crops from wind and rain, the covering material 1B is relatively large and suitable for an agricultural house premised on long-term use.

  As a material of the resin plate 14, for example, a polyester resin, a polycarbonate resin, a hard vinyl chloride resin, an acrylic resin, a reinforced fiber plastic, or the like can be employed. If acceptable in terms of cost, a glass plate may be employed instead of the resin plate 14.

  The fine concavo-convex structure 16 is a structure having a concavo-convex pitch of several tens of nm (preferably 50 nm or less), and can cause scattering due to Rayleigh scattering to ultraviolet light. The fine concavo-convex structure 16 can be formed on a resin by, for example, a nanoimprint method. In the resin plate 14, the ultraviolet light scattering agent 12 shown in FIG. 2 can also be applied as the ultraviolet light diffusing means.

  As shown in FIG. 3, when the visible light 3 is irradiated to the covering material 1B, most of the visible light 3 is transmitted through the resin plate 14 and the visible transmitted light 30 is irradiated downward. The ultraviolet light 4 is scattered by the fine concavo-convex structure 16 formed on the resin plate 14, the ultraviolet diffuse transmitted light 40 is irradiated downward, and the ultraviolet diffuse reflected light 42 is reflected upward. A part of the ultraviolet light 4 is irradiated downward as ultraviolet transmitted light 44.

[Application examples of coating materials]
FIG. 4 shows a first application example of the agricultural covering material. In this example, a region that transmits ultraviolet light without being diffused is provided in a part of the awning of an agricultural house. FIG. 4 shows a side view of the agricultural house 100. The agricultural house 100 has a function of diffusing and transmitting ultraviolet light in accordance with the interval between the aggregates 7 that are assembled vertically and horizontally to form the structure. The covering material 1 and the normal covering material 2 that directly transmits ultraviolet light are alternately extended in the vertical direction.

  For the bees diffused in the agricultural house 100, the covering material 1 is recognized as a light emitter that emits ultraviolet light. On the other hand, the normal coating material 2 transmits visible light and ultraviolet light almost as they are. In this case, the bee can sense the ultraviolet light (and visible light) from the sun and can correctly recognize the position and direction of the sun, as in the case of activity outdoors. This reduces the risk of losing the sense of balance.

  In addition, when viewed from the bees that have gone out from the agricultural house 100, regions where ultraviolet light diffuses and regions where light does not diffuse appear alternately, so that the agricultural house becomes a target that emits light as a characteristic pattern. For this reason, a bee can find an agricultural house where a nest box to be homed easily is installed even from a distance.

  Note that the pattern of the region in which the ultraviolet light is diffused and the region in which the ultraviolet light is not diffused shown in FIG. For example, each region may be a pattern that forms a horizontal stripe pattern, or may be a lattice pattern.

  FIG. 5 shows a second application example of the agricultural covering material. In this example, an area through which ultraviolet light is transmitted without being diffused is provided as an entrance at the front of the agricultural house. FIG. 5 shows the front of the agricultural house 100, and an entrance 20 is provided in the front of the agricultural house 100.

  The entrance / exit 20 is an opening and is configured as a region that transmits ultraviolet light (and visible light) as it is. Moreover, you may comprise so that the peripheral part of the entrance / exit 20 may diffuse an ultraviolet light more strongly. The bees can clearly distinguish the surrounding area (covering material 1) for diffusing ultraviolet light from the entrance / exit 20, and can also specify the position of the nest box through the entrance / exit 20. For this reason, even when a bee goes out of the agricultural house 100, the entrance / exit 20 of the agricultural house 100 can be easily specified, and the possibility that the bee cannot be returned to the nest box is reduced.

  FIG. 6 shows a third application example of the agricultural covering material. In this example, one agricultural house 100A and another agricultural house 100B are connected by a tunnel 60, and all or part of the tunnel 60 is constituted by the covering material 1 of the present invention. is there.

  Traditionally, farmers have had to install birdhouses in each of the agricultural houses for pollination. According to this example, the bees recognize the existence of the tunnel 60 and install a plurality of houses through the tunnel 60. Since you can come and go, you only need to install one birdhouse for each group of houses connected by a tunnel. For this reason, it is not necessary to install a nest box in each of the agricultural houses, and the cost of introducing a bee for pollination can be greatly reduced.

  In agricultural houses, soil fumigants are sometimes used to control pests. According to this example, the bees can be temporarily retracted to another house through the tunnel, so that the possibility that the bees are weakened by the soil fumigant can be reduced.

  FIG. 7 shows a fourth application example of the agricultural covering material. In this example, in a double-structure house, the outer awning is made of the covering material 1-1, the inner awning is made of the covering material 1-2, and an entrance (opening) 20 is provided in a part of the inner awning. It is. The portion of the entrance / exit 20 transmits ultraviolet light without diffusing it. Since the bees can recognize the covering material 1-1 and the covering material 1-2, the possibility of colliding with the outer awning and the inner awning is reduced. Further, in the covering material 1-2 for the inner awning, since the ultraviolet light diffusing region and the entrance / exit 20 can be clearly distinguished, there is little possibility of getting lost in the double structure space and returning to the nest box 50. Become.

  As described above, according to the agricultural covering material of the present invention, it is possible to prevent the visiting insects (honey bees) scattered in the house from colliding with the awning, and the bees to operate safely in the house. Can do. In addition, since there is little fear that the nest box group will decline due to the consumption of bees, the risk of renting nest boxes for beekeepers is reduced, and the benefits of both farmers and beekeepers can be established. Moreover, in the one aspect | mode of the agricultural house of this invention, since the position of the entrance / exit which reaches an agricultural house and a hive can be shown by the spreading | diffusion of an ultraviolet light, the loss | disappearance of a bee can be prevented.

1 Agricultural covering material 3 Visible light 4 Ultraviolet light 5 Visiting insects (honey bees)
10 Resin Film 12 Ultraviolet Light Scattering Agent 100 Agricultural House

Claims (5)

In a resin film transparent to visible light, including an ultraviolet light scattering agent that scatters ultraviolet light sensed by photoreceptors on the short wavelength side provided by visiting insects,
An agricultural covering material, wherein the ultraviolet light scattering agent is transmitted while being scattered by the ultraviolet light scattering agent.   2. The agricultural covering material according to claim 1, wherein an average particle size of the ultraviolet light scattering agent is 1/5 or less of a peak wavelength of a short-wavelength photoreceptor cell provided in the visiting insect.   The agricultural coating material according to claim 1 or 2, wherein the content of the ultraviolet light scattering agent is 5 wt% or less with respect to a resin constituting the agricultural coating material.   An agricultural house using the agricultural covering material according to any one of claims 1 to 3. The agricultural house according to claim 4, wherein a region that does not scatter the ultraviolet light is provided.