JP7301037B2 - Films for pots and hydroponics pots - Google Patents

Description

TECHNICAL FIELD The present invention relates to a pot film and a hydroponic culture pot provided with the pot film.

Conventionally, a cover has been proposed that prevents the growth of weeds by covering the soil surface. (See Patent Document 1, for example). The cover described in Patent Document 1 has a circular perforated line formed in the center, so that the size of the opening can be adjusted by cutting the center according to the thickness of the stem of the growing target plant. It's becoming

JP 2003-265045 A

Also in pots for hydroponics such as rock wool pots, plants such as algae sometimes grow unintentionally in addition to target plants. Since the growth of algae and the like makes it difficult for the target plant to grow, it has been desired to inhibit the growth of plants other than the target plant. Therefore, a method of inhibiting photosynthesis of plants other than the target plant (inhibition target plant) by using a film that hardly transmits light as a cover is conceivable.

By the way, in hydroponics, it is necessary to support the target plant by a water-retentive pot body made of rock wool or the like, and to supply water, fertilizer, etc. to the pot body, and the target plant passes through. It is necessary to form an opening for drip in addition to the opening. If these openings are too large for the objects to pass through, gaps will be formed, making it easier for light to pass through. However, if the film is made of a member that does not easily transmit light, it may be difficult to form perforation lines as described in Patent Document 1.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pot film that can be easily produced and that can suppress the growth of a plant to be inhibited, and a hydroponic cultivation pot comprising the pot film.

The pot film of the present invention is a pot film for covering the cultivation surface of a pot body having water retentivity in a hydroponics pot for growing a target plant, wherein the first opening through which the target plant passes is formed. The first opening is formed by a plurality of linear cuts that intersect with each other, and has a light transmittance of 0.5% or less in the wavelength band used for photosynthesis of the target plant to be inhibited.

According to the present invention as described above, in the pot film, the light transmittance in the wavelength band used for photosynthesis of the target plant to be inhibited (hereinafter referred to as the photosynthetic band) is 0.5% or less, It can inhibit photosynthesis by the inhibition target plant and suppress the growth. Incidentally, the light transmittance of the potting film may be based on the normal intensity of sunlight in the area where it is used, for example, based on an illuminance of 176,000 lux. The photosynthetic band is determined by the type of plant to be inhibited, and may be, for example, the visible light range (approximately 400 to 700 nm).

In addition, since the first opening is formed by a plurality of linear cuts that intersect each other, these openings have at least two sides formed by the linear cuts and a side that is continuous with the film body. , and a movable portion surrounded by . By deforming the movable part according to the thickness of the target plant or drip tube that passes through the opening, the actual opening size of the opening is adjusted, making it difficult for gaps to form and allowing light to pass through. can be suppressed. Since such an opening whose opening size is adjustable is formed by a linear cutting portion, it is easier to process than a configuration in which the opening size of the opening is adjustable by forming a perforated line or the like. There is, and the film for pots can be manufactured easily.

Further, the pot film of the present invention includes a laminate in which a first white film, a black film, and a second white film are laminated in this order, and the color value of the laminate is The L value of the face and the back face may be 70-80.

When the pot film is turned up, it becomes impossible for the pot film to shield the pot body from light, so that an environment in which the plant to be inhibited tends to grow is created in the pot body. However, with such a configuration, it is possible to prevent the pot film from being deformed and turned up while the target plant is growing. As a result, the growth of the plant to be inhibited in the pot body can be suppressed.

In the pot film of the present invention, the a value of the front surface and the back surface of the laminate may be -1 to -5, and the b value may be -5 to -10, in color values. .

With such a configuration, it is possible to prevent the pot film from being deformed and turned up while the target plant is growing.

In the pot film of the present invention, the first white film and the second white film may be low-density polyethylene films, and the black film may be a high-density polyethylene film.

With such a configuration, it is possible to prevent the pot film from being deformed and turned up while the target plant is growing.

Further, the pot film of the present invention has at least one second opening for supplying liquid to the pot body, and the second opening is formed by a plurality of linear cuts that cross each other. may

Since the second opening is formed by a plurality of linear cuts that intersect with each other, these openings have sides formed by at least two linear cuts, a side that is continuous with the film body, A movable portion surrounded by is formed. By deforming the movable part according to the thickness of the target plant or drip tube that passes through the opening, the actual opening size of the opening is adjusted, making it difficult for gaps to form and allowing light to pass through. can be suppressed. Since such an opening whose opening size is adjustable is formed by a linear cutting portion, it is easier to process than a configuration in which the opening size of the opening is adjustable by forming a perforated line or the like. There is, and the film for pots can be manufactured easily.

Also, the liquid supplied to the pot body through the second opening may contain, for example, moisture or nutrients.

Moreover, the film for pots of the present invention may have a mechanical strength of 0.6 kgf or more.

According to such a configuration, damage to the pot film can be suppressed during use. On the other hand, if the mechanical strength is too low, damage may occur, for example, the potting film may be cut so as to be continuous with the linear cut portion. Incidentally, the mechanical strength of the film means the magnitude of the force that can withstand breakage when a pulling force is applied to the film.

Further, the pot film of the present invention may have a thickness of 0.05 to 0.3 mm.

According to such a configuration, it is easy to secure the mechanical strength of the potting film, and the handling is facilitated. On the other hand, if the potting film is too thin, it may be difficult to ensure mechanical strength depending on the material, and if it is too thick, it may be difficult to deform and handle.

Further, in the pot film of the present invention, the pair of second openings may be arranged so as to sandwich the first opening.

According to such a configuration, it is possible to easily and evenly supply water, fertilizer, chemicals, etc. to the entire pot body.

Further, in the pot film of the present invention, the maximum opening area of the first opening may be 30 to 50% of the total area.

According to such a configuration, it is possible to accommodate target plants of various thicknesses, and a gap is less likely to be formed in the first opening. On the other hand, if the maximum opening area is too small, it may become difficult to pass a thick target plant. Moreover, if the maximum opening area is too large, the gap may become large when the movable portion is deformed.

On the other hand, a hydroponic cultivation pot of the present invention is a hydroponic cultivation pot for growing a target plant, and includes any one of the pot films described above and the pot body.

According to such a hydroponic cultivation pot of the present invention, the light transmittance is 0.5% or less, and the first opening is formed by a plurality of mutually intersecting linear cut portions, similar to the pot film. Formation facilitates production and suppresses the growth of the plant to be inhibited.

According to the pot film and the hydroponics pot of the present invention as described above, the light transmittance is 0.5% or less, and the opening is formed by a plurality of linear cuts that intersect each other. , can be easily produced and can suppress the growth of the inhibition target plant.

1 is a perspective view showing a hydroponics pot according to an embodiment of the present invention; FIG. It is a top view which shows the said hydroponics pot. FIG. 4 is a plan view showing a state in which the opening of the hydroponics pot is opened to the maximum. It is a sectional view showing the hydroponics pot. It is a top view which shows the film for pots of the hydroponics pot which concerns on the modification of this invention. FIG. 11 is a plan view showing an opening of a pot film of a hydroponic culture pot according to another modification of the present invention. 5 is a graph showing temperature changes of the pot body with and without the pot film of the example of the present invention. Example 10 and Reference Example 1 before evaluating the suppression of algae growth (Fig. 8 (a)) and after leaving the hydroponic cultivation pot in a place exposed to sunlight for one week (Fig. 8 (b)) 1 is a photograph of a state in which a film for a pot is turned up.

Hereinafter, each embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the hydroponic cultivation pot 1 of the present embodiment includes a pot film 2 and a water-retentive pot body 3, and is used for growing target plants such as paprika and tomatoes. . In this embodiment, the vertical direction is the Z direction, and the two directions in the horizontal plane are the X direction and the Y direction.

The pot film 2 inhibits the growth of algae that grow unintentionally in the pot body 3, and inhibits the growth of the target plant. A first opening 21 to pass through, a pair of second openings 22 and 23 through which the liquid can be supplied to the pot body 3, and a slit 24 are formed. In this embodiment, the pot film 2 is arranged so that each side extends along the X direction or the Y direction.

The first opening 21 is arranged in the central portion of the potting film 2 and is formed by four linear cuts L1 to L4 that intersect each other. The linear cut portion L1 extends along the X direction, the linear cut portion L2 extends along the Y direction, and the linear cut portion L3 extends at an angle of approximately 45° with respect to the X direction. , the linear cut portion L4 extends so as to be substantially perpendicular to the linear cut portion L3. The four linear cuts L1 to L4 intersect at the center point O. As shown in FIG.

The opening edge L5, which is a line segment that virtually connects the end of the linear cut portion L3 and the end of the linear cut portion L4 on one side in the X direction (right side in FIG. 2), extends along the Y direction. An opening edge L6, which is a line segment that virtually connects the end of the linear cut portion L3 and the end of the linear cut portion L4 on the other side in the X direction, extends along the Y direction. The opening edge L7, which is a line segment that virtually connects the end of the linear cut portion L3 and the end of the linear cut portion L4 on one side in the Y direction (upper side in FIG. 2), extends in the X direction. The opening edge L8, which is a line segment that virtually connects the end of the linear cut portion L3 and the end of the linear cut portion L4 on the other side in the Y direction, extends along the X direction. extended. A square is formed by such opening edges L5 to L8. That is, the linear cut portions L3 and L4 are diagonal lines of a square formed by the opening edges L5 to L8. Also, the ends of the linear cut portions L1 and L2 are located on the opening edges L5 to L8.

In the first opening 21, a triangular movable portion 21A surrounded by the linear cut portion L1, the linear cut portion L3, and the opening edge L5 is formed. Similarly, in the first opening 21, movable portions 21B to 21H are formed by two of the linear cut portions L1 to L4 and one of the opening edges L5 to L8. The eight movable parts 21A to 21H are separated from the other movable parts at the linear cutting parts L1 to L4, and the film body (the first opening 21 and the second 2 excluding the opening 22 ) 20 .

The movable portions 21A to 21H are deformable so as to roll up with the opening edges L5 to L8 as base ends. That is, the movable parts 21A to 21H are movable out of the XY plane. When all of the movable portions 21A to 21H are deformed so as to be perpendicular to the film body 20, the first opening 21 is opened to the maximum (maximum opening state) as shown in FIG.

As shown in FIG. 4 , the stem P of the target plant passes through the first opening 21 . At this time, the tips of the movable parts 21A to 21H (portions corresponding to the center point O) and their vicinity come into contact with the stem P. As shown in FIG. The thicker the stem P, the larger the movable portions 21A to 21H curl up, and the larger the actual opening formed by virtually connecting the tips of the movable portions 21A to 21H. That is, the substantial opening dimension of the first opening 21 is adjustable. Further, when the movable portions 21A to 21H are curled up, although some gaps are formed between the adjacent movable portions 21A to 21H, the entire square formed by the opening edges L5 to L8 is opened. In comparison, the movable portions 21A to 21H can block the passage of light.

In FIG. 4, the movable parts 21A to 21H move away from the recess 311, which will be described later, but they may move into the recess 311 as well.

Similarly to the first opening 21, the second openings 22 and 23 are each formed with four linear cut portions, resulting in four opening edges and eight movable portions. It is Therefore, the second openings 22 and 23 are substantially adjustable in opening size in the same manner as the first opening 21 . Also, the pair of second openings 22 and 23 are arranged so as to sandwich the first opening 21 from the Y direction.

Infusion means such as a tube through which liquid can pass or the tip of a container containing liquid is inserted into the second openings 22 and 23 to supply water to the pot body 3 or to dissolve water in the solution. Or dispersed fertilizer (nutrition) is supplied. Incidentally, when the drip means is inserted into the second openings 22 and 23 , the movable portion may move so as to slip into the cultivation surface 31 or may move away from the cultivation surface 31 .

The slit 24 is a cut portion that continues from the linear cut portion L1 to the outer edge of the potting film 2 and extends along the X direction. When the pot body 3 already planted with the target plant is covered with the pot film 2, the stem P of the target plant passes through the slit 24 and is positioned in the first opening 21. - 特許庁

The pot body 3 is formed in a rectangular parallelepiped block shape, for example, from mineral fibers such as rock wool, and the upper surface thereof serves as a cultivation surface 31 . Note that the pot body may be made of a water-retaining material, and is not limited to being made of mineral fibers. For example, the pot body may be made of fibrous material such as glass, metal, or resin, or organic material such as potting soil or coconut shell.

A recess 311 is formed in the cultivation surface 31, and the root of the target plant is arranged. The cultivation surface 31 is entirely covered with the potting film 2 , that is, the potting film 2 is formed larger than the cultivation surface 31 . For example, the length of one side of the pot film 2 is about 1 to 1.5 times, preferably about 1.1 to 1.3 times, more preferably about 1.1 to 1.5 times the length of one side of the cultivation surface 31. The total area of the potting film 2 is about 1 to 2.25 times, preferably about 1.21 to 1.69 times, more preferably about 1.21 to 1.69 times the total area of the cultivation surface 31. 0.21 to 1.44 times. In the illustrated example, the diameter of the recess 311, which is circular in plan view, and the length of the opening edges L5 to L8 of the first opening 21 are substantially equal. It may be larger or smaller than the length of ~L8. Water stored in the pot body 3 is supplied to the roots of the target plant arranged in the recess 311 .

A protective film 4 is wrapped around the outer peripheral surface of the pot body 3 (surfaces other than the cultivation surface 31 and the bottom surface 32) so that the operator can hold the pot body 3 with bare hands.

Here, the material, dimensions and various characteristics of the potting film 2 will be described. The potting film 2 can be made of the same material as the film 4, such as polyethylene. As a result, the pot film 2 has water repellency and heat insulating properties. The potting film 2 is formed in a square shape with a side length of 110 to 150 mm, preferably 110 to 140 mm, more preferably 120 to 130 mm, for example. The thickness of the pot film 2 is 0.05 to 0.3 mm, preferably 0.05 to 0.2 mm, 0.05 to 0.08 mm, more preferably 0.05 to 0.1 mm, In addition, it may be 0.05-0.08 mm or 0.05-0.07 mm, such as 0.12, 0.15, 0.18 or 0.20 mm. The potting film 2 has a mechanical strength of 0.6 to 1.8 kgf, preferably 0.75 to 1.4 kgf, more preferably 0.9 to 1.4 kgf.

For example, the front surface (surface facing away from the cultivation surface 31) 2A of the potting film 2 can be used as a light reflecting surface, and the back surface (surface facing the cultivation surface 31) 2B can be used as a light absorbing surface. The surface 2A is formed so as to reflect at least light in the wavelength band (photosynthetic band) used for photosynthesis of the inhibition target plant, and may be white or red, for example. Further, when the rear surface 2B is used as a light absorbing surface, it is formed so as to absorb at least light in the photosynthetic band, and may be black or green, for example. The photosynthetic band may be, for example, the visible light range (approximately 400 to 700 nm).

With such a configuration, the light that reaches the cultivation surface 31 by passing through the potting film 2 or passing through the gaps between the openings 21 to 23 is reflected by the cultivation surface 31 and is reflected by the potting film 2. is irradiated to the rear surface 2B. The light irradiated onto the back surface 2B is absorbed by the back surface 2B, which is an absorbing surface. Therefore, the cultivation surface 31 is suppressed from being re-irradiated with the light that has reached the rear surface 2B.

Alternatively, the pot film 2 may include a laminate in which a first white film, a black film, and a second white film are laminated in this order. In this case, the front surface 2A and the back surface 2B are white, and the film for pots has a black film sandwiched inside. In addition, the front surface of the first white film may be the front surface 2A, the front surface of the second white film may be the back surface 2B, and the front surface of the first white film may be the back surface 2B. 2 The front surface of the white film may be the surface 2A.

When the potting film 2 is a laminate having such a white/black/white three-layer structure, the surface 2A serves as a light reflecting surface. In addition, although the back surface 2B also serves as a light reflecting surface, the light is absorbed by the black film, so less light passes through the potting film 2 and reaches the cultivation surface 31 . Therefore, the light that reaches the rear surface 2B and is re-irradiated to the cultivation surface 31 has very little effect on the target plant, and photosynthesis by the inhibition target plant on the cultivation surface 31 can be inhibited.

Here, the white film may be not only a white film but also a film having one color or a mixture of colors such as red, green, yellow, blue and black, which is basically white. In addition, the first white film and the second white film preferably have the same color from the viewpoint of curling up.

Moreover, the black film may be not only a black film but also a film having one color or a plurality of colors such as red, green, yellow, blue, and black, which is basically black.

When the potting film 2 is a laminate having a three-layer structure of white/black/white, the L value of the front surface (front surface 2A) and back surface (back surface 2B) of the laminate is If it is 70 to 80, the front surface 2A and the back surface 2B function as light reflecting surfaces. In addition, when the L value is less than 70, there is a possibility that the light reflection performance may deteriorate, and it may not be possible to inhibit photosynthesis by the inhibition target plant. Note that there is no problem even if the L value is 80 or more.

In terms of color values, the laminate may have an a value of −1 to −5 and a b value of −5 to −10 for the front and back surfaces of the laminate. That is, not only the front surface and the back surface of the laminate are white, but also the hue may be one or a mixture of red, green, yellow, blue, black, and the like, which is basically white. If the a value and the b value are within the above ranges, the front surface 2A and the back surface 2B function as light reflecting surfaces. If the a value and the b value are out of the above range, the light reflection performance may be deteriorated, and the photosynthesis by the target plant to be inhibited may not be inhibited.

When the potting film is deformed and turned up by light or heat while the target plant is growing, the potting film cannot shield the pot body from light, and the cultivation surface 31 is exposed. It may not be possible to inhibit photosynthesis by the target plant. However, when the potting film 2 is a laminate having such a white/black/white three-layer structure, it is possible to suppress deformation and turning up of the potting film during the growth of the target plant. can. As a result, the growth of the plant to be inhibited in the pot body can be suppressed.

The first white film and the second white film may be low density polyethylene films (LDPE), and the black film may be low density polyethylene film (LDPE). By laminating so-called hard polyethylene and soft polyethylene, an effect of suppressing deformation of the potting film can be expected, and curling up can be suppressed.

The pot film 2 has a light transmittance in the photosynthetic zone of 0.5% or less based on the intensity of normal sunlight (for example, illuminance of 176000 lux) in the area where the hydroponics pot 1 is used. For example, when an illuminance of 176000 lux is measured without the film, the light transmittance may be such that an illuminance of 880 lux is measured with the film. The index used as a reference for the light transmittance of the potting film 2 is not limited to illuminance, and may be luminous energy, luminous flux, luminous intensity, luminance, or the like.

In addition, the maximum opening area of the first opening 21 (the area of the square formed by the opening edges L5 to L8) is 30 to 50%, preferably 30 to 40%, more preferably 30 to 40% of the total area of the potting film 2. is 30-35%. Further, the maximum opening area of the second openings 22 and 23 is 4 to 13%, preferably 6 to 10%, and more preferably 8 to 10% of the total area of the potting film 2 .

According to this embodiment, the following effects are obtained. That is, when the light transmittance of the potting film 2 in the photosynthetic zone is 0.5% or less, the photosynthesis of the inhibition target plant can be inhibited and the growth thereof can be suppressed.

In addition, the first opening 21 and the second openings 22 and 23 are formed by a plurality of linear cuts that intersect with each other, and the movable portion is formed, so that the target plant can pass through the openings 21 to 23. By deforming the movable part according to the thickness of the drip means, the substantial opening dimensions of the openings 21 to 23 can be adjusted to make it difficult for gaps to be formed, thereby suppressing the passage of light. Since the openings 21 to 23 whose substantial opening dimensions can be adjusted in this way are formed by linear cutting portions, processing is easy, and the potting film 2 can be easily manufactured.

Moreover, since the movable portion is not separated from the film main body 20, it is possible to reduce the generation of waste compared to a structure in which a part of the film is cut to form an opening.

Further, when the pot film 2 has a mechanical strength of 0.6 kgf or more, preferably 0.75 kgf or more, and more preferably 0.9 kgf or more, damage during use can be suppressed. On the other hand, if the mechanical strength of the potting film 2 is too low, the potting film will be cut so as to be continuous with the linear cut portions L1 to L4 (that is, the openings 21 to 23 will unintentionally widen). damage) may occur.

Further, since the thickness of the potting film 2 is 0.05 to 0.3 mm, it is easy to ensure mechanical strength and easy handling. On the other hand, if the potting film 2 is too thin, it may be difficult to secure the mechanical strength depending on the material, and if it is too thick, it may be difficult to deform and handle.

In addition, since the pair of second openings 22 and 23 are arranged so as to sandwich the first opening 21 , it is possible to easily and evenly supply water and fertilizer to the entire pot body 3 . Furthermore, when a plurality of hydroponic culture pots 1 are arranged in a predetermined direction to grow seedlings, the pair of second openings 22 and 23 are arranged so as to sandwich the first opening 21, so that a plurality of The second openings 22 of the hydroponic cultivation pots 1 can be arranged in a line along a predetermined direction, and the second openings 23 of a plurality of hydroponic cultivation pots 1 can be arranged in a line along the predetermined direction. As a result, the work efficiency of inserting an injection tool (for example, a dropper-like or peg-like tool (dripper)) for injecting a liquid (nutrients, moisture, etc.) into the second openings 22 and 23 can be significantly improved. . Further, if at least one second opening is formed, the potting film 2 is placed in a pot by a plant such as a seedling inserted through the first opening 21 and an injection tool inserted through the second opening. It can be positioned and fixed (or locked) with respect to the main body 3, and the pot film 2 can be prevented from being blown away or detached from the pot main body 3 by wind, rain, insects, or the like.

In addition, since the maximum opening area of the first opening 21 is 30 to 50% of the total area of the pot film 2, it is possible to accommodate target plants of various thicknesses, and the first opening A gap is less likely to be formed at 21 . On the other hand, if the maximum opening area is too small, it may become difficult to pass a thick target plant. Also, if the maximum opening area is too large, the gap may become large when the movable portions 21A to 21H are deformed.

Further, since the potting film 2 is made of a material having water repellency, when the water stored in the pot main body 3 evaporates, it is difficult for this water to pass through. Therefore, a decrease in the water content of the pot body 3 can be suppressed.

In addition, since the pot film 2 is formed of a member having heat insulating properties, the change in the temperature inside the pot body 3 can be prevented when the external environment (amount of sunlight, temperature, etc.) of the hydroponic cultivation pot 1 changes. can be made smaller. Therefore, the growing environment of the target plant can be improved.

In addition, since the potting film 2 is formed with the three openings 21 to 23, the target plant passes through the first opening 21, and the drip means passes through at least one of the pair of second openings 22 and 23. When the pot film 2 passes through the pot body 3, it is possible to prevent the pot film 2 from moving in parallel or rotating.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments, and includes other configurations and the like that can achieve the object of the present invention, and modifications such as those shown below. is also included in the present invention.

For example, in the above embodiment, the pair of second openings 22 and 23 are arranged to sandwich the first opening 21 from the Y direction, but the pair of second openings are arranged from the X direction to the second opening 21 . 1 opening may be sandwiched, or, as shown in FIG. 5, the first opening may be sandwiched from a direction inclined with respect to the X direction. In the example of FIG. 5 , the pair of second openings 24 and 25 are arranged on extensions of diagonal lines of the square-shaped first opening 21 . Also, the potting film may have three or more second openings surrounding the first opening.

In addition, when the liquid is easily diffused in the pot body 3 and the distribution of moisture and fertilizer is difficult to be uneven, the pair of second openings may not sandwich the first opening. A configuration in which only two openings are formed may be employed.

Further, in the above-described embodiment, the first opening 21 is formed by four linear cuts L1 to L4, but the first opening includes at least two linear cuts that intersect each other. It should be formed by For example, as shown in FIG. 6, the first opening 26 may be formed by two linear cuts L11 and L12 that are substantially perpendicular to each other. Similarly, the second opening may be formed by at least two linear cuts that intersect each other.

In the above embodiment, the pot film 2 has a mechanical strength of 0.6 to 1.8 kgf, a thickness of 0.05 to 0.3 mm, and a maximum opening area of the first opening 21 of the pot. Although it is 30 to 50% of the total area of the film 2 for printing, the dimensions, characteristics, etc. shown in the above embodiment can be changed as appropriate without departing from the gist of the present invention. Therefore, the scope of the present invention should not be construed as limited by the above embodiments.

In addition, although the best configuration, method, etc. for carrying out the present invention have been disclosed in the above description, the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it may be modified in any manner to such embodiments without departing from the spirit and scope of the invention. , materials, quantity, and other detailed configurations can be modified in various ways by those skilled in the art. Therefore, the descriptions that limit the shape, material, etc. disclosed above are exemplified to facilitate understanding of the present invention, and do not limit the present invention. The description by the name of the member that removes part or all of the limitation such as is included in the present invention.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

<Test Example 1>
In Test Example 1, the following tests were conducted to verify the light transmittance of the pot film, the effect of suppressing the growth of algae, the change in the temperature of the pot body, and the change in the water content of the pot body.

In the hydroponics pot, the cultivation surface of the pot body was covered with pot films of Examples 1 to 9 and Comparative Examples 1 to 5 as shown in Table 1, and various characteristics were evaluated. In addition, Comparative Example 6 was made under the condition that the film for the pot was not used.

[Light transmittance and suppression of algae]
A daylight color 32W fluorescent lamp (FL-32SP, manufactured by Takagi Co., Ltd.) was used as the light source, and an illuminometer (MT-912, manufactured by Urceri) was installed at a position 100 mm away from the lamp, and between the light source and the illuminometer. The pot films of Examples 1 to 9 and Comparative Examples 1 to 5 were arranged, and the light transmittance of each pot film was measured. That is, the illuminance (specifically, the integrated value of the illuminance in the wavelength range of 400 to 700 nm) measured with each potting film arranged is the illuminance measured without the potting film (Comparative Example 6). (Specifically, the integrated value of the illuminance in the wavelength range of 400 to 700 nm) was divided and expressed as a percentage, which was taken as the light transmittance.

In addition, the pot body was immersed in Otsuka House SA prescription solution (pH 6.8, EC 2.4 dS/m) in which algae as the target plant to be inhibited were suspended, and a treatment was performed to allow the pot body to absorb sufficient water and attach the algae to the pot surface. bottom. As the pot body, a cuboid rock wool pot having a plane size of 100 mm×100 mm and a height of 75 mm was used. The pot film of Examples 1 to 9 and Comparative Examples 1 to 5 (planar dimensions: 120 mm x 120 mm; no first opening or second opening) is prevented from being turned up, and the pot body is protected from light from the outside. A pot film was fixed to the pot body so as to cover the cultivation surface so as not to create a gap for direct light to enter the interior, and the hydroponic cultivation pot was left in a place exposed to sunlight for 33 days. Table 1 shows the results of light transmittance and degree of suppression of algae growth under each condition. In the degree of inhibition of algae growth in Table 1, the case where no algae growth was observed on the surface of the pot was evaluated as "◯", and the case where the growth of algae was observed on the surface of the pot was evaluated as "x".

As shown in Table 1, when the films for pots of Examples 1 to 9 were used, the growth of algae could be suppressed. That is, algae growth was suppressed under the condition that the light transmittance was 0.48% or less.

[Temperature change]
The change in temperature of the pot body was measured under the condition of using the pot film and the condition of not using it. The film of Example 2 was used as the pot film. The temperature was measured by inserting a thermometer about 10 mm into the cultivation surface. FIG. 7A shows the temperature change on a day with less sunshine, and FIG. 7B shows the temperature change on a day with more sunshine. In addition, Table 2 shows the average temperature, maximum temperature, and minimum temperature under each condition on days when there was a lot of sunshine.

On any day, the condition with the film had a lower maximum temperature and a higher minimum temperature than the condition without the film. That is, the temperature change was smaller under the condition with the film than under the condition without the film.

[Moisture content change]
The water content of the pot body was measured under the condition of using the pot film and the condition of not using the pot film. The film of Example 2 was used as the pot film. The pot body was sufficiently soaked with water, and the water content in this state was defined as 100%, and the change in the water content was evaluated based on the weight change of the pot body. The measurement was carried out under the condition that the hydroponic cultivation pot was placed on the seedling box for medium seedlings and left still in the house. Table 3 shows changes in water content.

The water content was less likely to decrease under the condition with the film than under the condition without the film. That is, it was possible to prevent water from evaporating from the cultivation surface and escaping from the pot body.

<Test example 2>
In Test Example 2, the effect of suppressing the growth of algae due to the potting film being turned up was verified by the following tests.

In the hydroponics pot, the cultivation surface of the pot body was covered with the pot film 2 of Example 10 and Reference Example 1 as shown in Tables 4 and 5, and the light transmittance, color value, and suppression of algae were evaluated.

Here, the film for pots of Example 10 is a film for pots composed of a laminate having a three-layer structure in which a first white film, a black film, and a second white film are laminated in this order. The second white film was placed on the cultivation surface side. Further, the film for pots of Reference Example 1 is a film for pots composed of a laminate having a two-layer structure in which a first white film and a black film are laminated in this order, and the black film is on the cultivation surface side. I made it

As shown in FIG. 2 , the pot film 2 of Example 1 and Reference Example 1 includes a first opening 21 through which the target plant passes and a pair of second openings 21 for supplying liquid to the pot body 3 . The openings 22 and 23 and the slit 24 were used which were formed in the same way.

[Light transmittance]
A daylight color 32W fluorescent lamp (FL-32SP, manufactured by Takagi Co., Ltd.) was used as the light source, and an illuminometer (MT-912, manufactured by Urceri) was installed at a position 100 mm away from the lamp, and between the light source and the illuminometer. The pot films of Example 10 and Reference Example 1 were arranged, and the light transmittance of each pot film was measured. That is, the illuminance (specifically, the integrated value of the illuminance in the wavelength range of 400 to 700 nm) measured with each potting film arranged is the illuminance measured without the potting film (Comparative Example 6). (Specifically, the integrated value of the illuminance in the wavelength range of 400 to 700 nm) was divided and expressed as a percentage, which was taken as the light transmittance.

[Color value]
Using a colorimeter ("COLOR READER CR-20" manufactured by Konica Minolta Japan Co., Ltd.), L of the first white film, black film, and second white film of the pot film of Example 1 and Reference Example 1 value, a value, and b value were measured.

[Evaluation of suppression of algae growth]
The pot body was immersed in Otsuka House SA formulation solution (pH 6.8, EC 2.4 dS/m) in which algae as the plant to be inhibited was suspended, and the pot body was allowed to sufficiently absorb water to adhere the algae to the pot surface. As the pot body, a cuboid rock wool pot having a plane size of 100 mm×100 mm and a height of 75 mm was used. The pot film 2 (planar dimensions 120 mm × 120 mm) of Example 10 and Reference Example 1 was placed on the cultivation surface without being fixed to the pot body so that there was no gap for external light to enter the pot body directly. The hydroponic culture pot was left in a place exposed to sunlight for one week. Table 4 shows the results of whether or not the film for pots was turned up and the degree of suppression of algae growth. In the degree of inhibition of algae growth in Table 1, the case where no algae growth was observed on the surface of the pot was evaluated as "◯", and the case where the growth of algae was observed on the surface of the pot was evaluated as "x".

As shown in Tables 4 and 5, when the pot film of Example 10 was used, algae growth could be suppressed. This result shows that in Example 10, even if the pot film is not fixed to the pot body, it is placed on the cultivation surface so that it does not turn up, and there is a gap through which light from the outside enters directly into the pot body. It is thought that it was possible to prevent the occurrence of

On the other hand, when the pot film of Reference Example 1 was used, algae growth could not be suppressed. As a result, in Reference Example 1, if the potting film is only placed on the cultivation surface without being fixed to the pot body, the potting film will be turned up, and the light from the outside will be exposed to the inside of the pot body. It is thought that this is because a gap has been created where the light directly enters the

Figure 8 shows Example 10 before evaluating the suppression of algae growth (Figure 8(a)) and after leaving the hydroponic cultivation pot in a place exposed to sunlight for one week (Figure 8(b)). 3 is a photograph of the film for pots of Reference Example 1, in which the film is turned up. In FIG. 8( a ), neither the pot film of Example 10 nor Reference Example 1 was found to be curled up. On the other hand, in FIG. 8(b), although the film for pots of Example 10 did not turn up, the film for pots of Reference Example 1 turned up, and algae was observed on the exposed cultivation surface. rice field.

In addition, the hydroponic cultivation pot using the pot film of Example 10 was left in a place exposed to sunlight for three weeks from the state of FIG. As a result, the cultivation surface was not exposed, and algae growth was continuously prevented.

1 Hydroponics Pot 2 Pot Film 21 First Opening 22, 23 Second Opening 3 Pot Body 31 Cultivation Surface L1 to L4 Linear Cutting Section

Claims (7)

A pot film for covering a cultivation surface of a pot body having water retentivity in a hydroponic cultivation pot for growing a target plant,
Having a first opening through which the target plant passes,
The first opening is formed by a plurality of linear cuts that intersect with each other,
Light transmittance is 0.48 % or less in the wavelength band used for photosynthesis of the target plant,
in turn,
a first white film;
a black film;
a second white film;
comprising a laminated body of
In the color value, the L value of the front surface and the back surface of the laminate is 70 to 80,
In the color value, the a value of the front surface and the back surface of the laminate is -1 to -5, the b value is -5 to -10,
The first white film and the second white film are low-density polyethylene films,
A pot film, wherein the black film is a low-density polyethylene film. 2. The pot according to claim 1, comprising at least one second opening for supplying liquid to said pot body, said second opening being formed by a plurality of linear cuts crossing each other. the film. 3. The film for pots according to claim 1, which has a mechanical strength of 0.6 kgf or more. The film for pots according to any one of claims 1 to 3, which has a thickness of 0.05 to 0.3 mm. 3. The pot film according to claim 2, wherein the pair of second openings are arranged so as to sandwich the first opening. The potting film according to any one of claims 1 to 5, wherein the maximum opening area of the first openings is 30 to 50% of the total area. A hydroponic cultivation pot for growing a target plant,
A pot film according to any one of claims 1 to 6;
A hydroponic cultivation pot comprising the pot body.

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