JP4749943B2 - White asparagus cultivation film and cultivation house using it - Google Patents

Description

The present invention relates to a covering film for cultivation of white asparagus performed in a house and a cultivation house using the same .

  In general, white asparagus was cultivated by putting a digging device into the soil and observing that the surface of the soil was cracked like the bamboo cultivating, in order to cultivate white asparagus. For this reason, not only the white asparagus that can be harvested during the harvesting operation but also the young shoots and roots that can be harvested in the near future are often mistakenly cut out, requiring a lot of labor and experience, and there is a disadvantage that stable harvesting is not possible. Further, there is a problem in that the sanding tends to be uneven, and in particular, white asparagus having a certain length cannot be harvested. Since harvested asparagus is exposed to light because it is harvested in the sun, there is a problem that the harvested asparagus becomes pink or yellowish and reduces the product value. there were. In addition, asparagus germinates vigorously when it warms up, and when it germinates from the ground surface, it becomes green. Therefore, it is necessary to harvest 2 to 3 times a day, resulting in a labor burden problem such as a longer harvesting operation time. In order to solve these problems, from around 1964 to 1968, tests were carried out in Toyo Food Junior College, Hokkaido University, etc. with a tunnel covering that covered a light-shielding film (siloupolito). It was coated with a film that transmits light of 20 lux under 30,000 lux (light shielding rate 99.99984%), but with slight light leakage, it turned pale pink or light orange or pink streaks. There was a quality problem such as a certain asparagus, the temperature inside the coating was too high, over 40 ° C, and the head of the asparagus opened, it became light brown due to the high temperature, and a bitter taste occurred. . In particular, the cultivation technology in the high temperature period from late spring to summer has not been established, and it has reached today.

Patent Document 1 describes easy planting, suitable for soft white cultivation of vegetables such as white asparagus and udon, and almost complete shading, and the coated interior is not hot or humid and does not condense. Agricultural and horticultural cover sheet having sufficient air permeability that does not adversely affect the food and a method for soft and white cultivation of vegetables using the same are disclosed. ing. The present invention is “agricultural and horticultural sheet comprising a porous sheet having an air permeability of 1 cc / cm ² / sec or more and having a light shielding rate of 95% or more. The main point is to cultivate soft white. Since the present invention has sufficient air permeability for plant growth and has sufficient light-shielding properties for soft white cultivation, soft white cultivation is possible without adversely affecting plant growth. Even when complete shading is not required, the shading rate can be arbitrarily set by raising the lower part a little, and the application range is wide. It is said that soft white cultivation of vegetables such as white asparagus, udo, and leek is easy and has the effect of reducing labor. However, the shading rate of this agricultural and horticultural sheet is set to 95% or more, and it cannot be said that the shading rate is sufficient for white asparagus that has a slight pink light leak and is light pink. The planted asparagus is sandwiched from both sides to provide sufficient light shielding while ensuring sufficient ventilation, and is not intended for gardening houses.

Patent Document 2 is intended to provide a year-round stable production method for white asparagus and the like. “(1) A strain of soft white vegetables is stored in a predetermined box container, (2 ) Strain the above strain into a cultivation facility of a predetermined temperature and dark condition, germinate soft white vegetables, and (3) control the budding situation in the cultivation facility by adjusting the time when the strain is buried, ( 4) According to the above (1) to (3), “a method for producing soft white vegetables taking steps to realize the stable germination of soft white vegetables for the year” is disclosed. Although it is described in this specification that a preferable temperature condition of a facility having a predetermined temperature and dark condition is in a gas phase of 15 to 20 ° C. and a humidity of about 90%, the preferable dark condition is a predetermined box. It is only described that it is housed in a body container, and its specific conditions are not disclosed. In the present invention, it is understood that the management of temperature and humidity is more important than the light shielding rate.
Japanese Patent Laid-Open No. 5-304836 “Agricultural and Horticultural Sheet and Vegetable Manufacturing Method” Published on November 19, 1993 Japanese Patent Laid-Open No. 2004-201680 “Annual Stable Production Method for White Asparagus, etc.” Released on July 22, 2004

  An object of the present invention is to provide a covering material capable of cultivating anniversary white asparagus regardless of the variety, by simply covering a conventional cultivation field of asparagus with a film having a light-reflective function.

The film for white asparagus cultivation of the present invention is formed on the innermost surface of a film formed by laminating a film having a visible light reflectance of 70% or more and a shielding layer using a shielding material such as carbon black, titanium oxide or aluminum. A non-woven fabric was laminated or adhered, and an antifogging material was applied or kneaded on the innermost surface, and had a light transmission of 15 lux (light shielding rate: 99.95333%) or less under 30,000 lux.

White asparagus coated cultivating house of the present invention covers over at least asparagus 2 ridges, to the structure directly connected lodging preventing post asparagus in a frame having a proper size that walk standing at harvest, claim 1 Alternatively, the film with a reflection / light shielding function described in any one of 2 is covered, and a partition that can be moved in and out with the film with the reflection / light shielding function is provided at an entrance inner position.

  The film for white asparagus cultivation of the present invention employs a configuration in which a nonwoven fabric is laminated or adhered to the innermost surface. Since it flows down to the side of the frame through the fiber, it prevents over-moisture on the inner surface of the reflective light shielding film and eliminates the drop of water droplets due to the shaking of the coating film due to the wind. An air layer is more easily formed with a double coating than with a direct lamination, and the buffering performance is enhanced, and there is an effect of preventing a higher temperature than a single film.

  The house for white asparagus-covered cultivation according to the present invention is a structure in which at least two asparagus is covered, and a structure having an appropriate size of asparagus on a frame that has an appropriate size so that it can stand at the time of harvesting. Since the partition with the reflective / light-shielding function according to the present invention is provided at the position inside the entrance and the partition with the reflective / light-shielding function is provided, the entrance / exit can be performed without entering the indoor cultivation field. Moreover, the cultivation environment which can be harvested without exposing the quality of the harvested asparagus to the direct sunlight and high temperature and reducing it more than necessary can be made. Also, the harvesting work can be done by walking in the room, and the harvesting work can be done without directly stiffening the roots of asparagus. And this house can be used for yellow leek and Udo cultivation.

The environmental conditions for cultivating white asparagus presented by the present invention will be described below. If the following shading conditions and room temperature conditions in the coating are in place, cultivation is possible wherever conventional asparagus cultivation is performed.
First, the light shielding environment will be described in detail. Even if the shading rate is 99.9995%, the asparagus may be slightly reddish depending on the cultivation conditions. In the past, even if the light shielding rate was 99.9997%, it may have turned pink, but the knowledge that the coloring phenomenon varies depending on the type of asparagus and the temperature environment, comprehensively judging past test results, light shielding The rate 99.9995% was provisionally certified as the coloring limit for white asparagus cultivation. When the asparagus is cultivated after covering the shading film, the asparagus that is lightly colored pink or yellowish green turns green only at the newly stretched area after 7 days covering the shading film. It became easy to do asparagus, and the growth at the time of stock cultivation was delayed compared to conventional asparagus cultivation. When 99.9999984% of the light-shielding film was used, asparagus turned white, and after removing the light-shielding film, it turned green in a short time and grew to the same degree as usual after one month. From these results, it was determined that a shading rate of 99.9995% or more is suitable for shading in white asparagus cultivation.

  This light shielding ratio can be easily achieved by using carbon black or aluminum particles alone or mixing a suitable amount of carbon black and titanium oxide on the inner surface or intermediate layer of a laminated film using an appropriate polyolefin-based resin. In addition, if an appropriate anti-fogging agent is mixed or applied only to the inner layer in the intermediate layer and the inner layer, the condensation on the inner surface of the coating disappears, and there is no adhesion of water droplets to asparagus due to condensation, resulting in the occurrence of diseases caused by film coating. Can be spun in advance. Further, at the time of harvesting, the harvesting worker is not soaked by the condensed water, and a comfortable harvesting work can be performed. What is shown in FIG. 1 is a visible light reflecting layer 1 kneaded with titanium oxide or aluminum or deposited with aluminum or stainless steel, or a light-shielding layer 2 kneaded with carbon black, and an antifogging agent on the surface thereof. It has a laminated film structure composed of kneaded or coated layers 3. 2 shows a visible light reflecting layer 1 kneaded with titanium oxide, a light-shielding layer 2 in which a layer 2a kneaded with carbon black and a layer 2b kneaded with aluminum are laminated, and a protective layer on the surface thereof. It has a laminated film structure composed of a layer 3 kneaded or coated with a clouding agent. 3 shows a laminated film structure comprising a visible light reflecting layer 1 kneaded with titanium oxide, a light-shielding layer 2 kneaded with carbon black, and a layer 3 kneaded or coated with an antifogging agent on the surface thereof. belongs to. 4 includes a visible light reflecting layer 1 in which titanium oxide is kneaded, a light shielding layer 2 in which titanium oxide and carbon black are kneaded, and a layer 3 in which an antifogging agent is kneaded or applied on the surface thereof. It has a laminated film structure.

  When the non-woven fabric is coated on the inner surface of the reflective light-shielding film and the anti-fogging treatment is applied to the non-woven fabric in particular, the condensed water adhering to the reflective light-shielding film is absorbed by the nonwoven fabric and flows down to the side of the frame through the non-woven fabric. It prevents over-humidity on the inner surface of the coating and eliminates the drop of water droplets due to the shaking of the coating film due to the wind, and also has a buffering effect on the heat conduction of the reflective light-shielding film. The air layer is more easily formed, and the buffering performance is higher. Further, from the covering work surface, it is suitably adhered to the side surface or an appropriate position of the reflective light-shielding film in the length direction. In FIG. 5 (1), the non-woven fabric layer 4 is laminated on the visible light reflecting layer 1 and the light shielding layer 2. In FIG. 5 (2), the nonwoven fabric layer 4 is locally bonded to a film in which the visible light reflecting layer 1 and the light shielding layer 2 are laminated.

アスパラ栽培は、１２月〜翌年４月の低温時はハウスで栽培し、５月中旬以降は露地で栽培しており、ハウス栽培時は反射遮光フィルムを内張りカーテンとして使用し、ホワイトアスパラを栽培する。この場合外気温度は低くてもハウス内の室温は２５℃程度に達しているので、反射遮光フィルム内の室温は最高３０℃近くに達しており、反射率７０％以下のフィルムを使用した場合アスパラ栽培の限界温度４０℃以上になる可能性が高い。ハウス栽培における室温の高低は天候、特に日照量の多寡に左右される欠点を有している。露地栽培では後述の新たなフレーム支柱導入を要すが、外気温３０℃以上で栽培する時は、可視光反射率８０％以上のフィルムを使用し、フィルム上に適当な時間灌水すれば、フレーム被覆内の室温が外気温度より低くなる。 Next, the room temperature environment in the coating will be described in detail. The growth temperature range of asparagus cultivation is said to be 5 to 38 ° C., especially at 40 ° C. or higher, high temperature disorders such as the occurrence of diseases and poor growth occur, and the temperature at which growth is most vigorous is 20 to 30 ° C., which is close to this temperature condition. Using a film or covering method means efficient asparagus cultivation. As shown in Table 1, the film with a hermetically sealed reflective light-shielding function has a close relationship between the reflectance and room temperature, and the higher the reflectance, the lower the rise in room temperature. In the room with a rate of 84%, the maximum outside air temperature was 27 to 32.9 ° C., the average was + 3.8 ° C., and in the room with a visible light reflectance of 70%, the average was + 5.4 ° C. When a film with a visible light reflectance of 70% is used, the maximum temperature is about 27 ° C. and the room temperature is 32 ° C. Therefore, in Fukushima Prefecture, it is judged that cultivation is possible until about early July. The rate was 70% or more.

Asparagus is cultivated in a house at low temperatures from December to April of the following year, cultivated in open-air after mid-May, and cultivates white asparagus using a reflective shading film as a lining curtain during house cultivation. . In this case, since the room temperature in the house has reached about 25 ° C even if the outside air temperature is low, the room temperature in the reflective light-shielding film has reached a maximum of nearly 30 ° C. There is a high possibility that the maximum temperature for cultivation will be 40 ° C or higher. The height of room temperature in house cultivation has a defect that depends on the weather, especially the amount of sunlight. In outdoor cultivation, it is necessary to introduce a new frame strut, which will be described later. When cultivating at an outside temperature of 30 ° C or higher, use a film with a visible light reflectance of 80% or higher and irrigate the film for an appropriate period of time. The room temperature in the coating is lower than the outside temperature.

フィルム内に、酸化チタン３ｗｔ％以上混練り又はアルミ蒸着或いはステンレススパッタリングを行えば可視光反射率７０％以上を容易に達成する。使用場面では高反射面を低温時以外は、外面に使用することが望ましい。 Therefore, in the present invention, a reflective light-shielding film having the irrigation function shown in FIG. 6 is presented. As shown in (1) of the figure, the irrigation tube 5 with holes formed at appropriate intervals is arranged at the central portion in the width direction of the film 10 with reflection / shielding function according to the present invention, and the irrigation tube 5 is fixed. The covering film 6 is covered, and both sides of the covering film 6 are intermittently heat-welded in the longitudinal direction. The water supplied through the hole of the irrigation tube 5 flows out from the non-thermal welding region of the coating film 6 and flows down on the film 10 with a reflection / light shielding function to cool it. In the figure (2), the irrigation tube 5 with holes formed at appropriate intervals is arranged in the central portion in the width direction of the film 10 with reflection / shielding function according to the present invention. It is to be fixed with. The water supplied through the hole of the irrigation tube 5 flows out through the fixing nonwoven fabric or net 7 and flows down on the film 10 with a reflection / light shielding function to cool it. Moreover, what is shown to (3) of the figure is arrange | positioning the irrigation tube 5 by which the hole was opened by the appropriate space | interval in the width direction center part of the film 10 with a reflective light-shielding function based on this invention, and attaches the irrigation tube 5 to adhesive Alternatively, it is fixed by heat welding. The water ejected from the hole of the irrigation tube 5 flows down on the film 10 with a reflection / light shielding function and cools it as shown in FIG.
As a result of investigating the reflection light-shielding film provided with this irrigation function on the house in Iwaki City, Fukushima Prefecture, as shown in Table 2, the temperature inside the coating became 30 ° C. or less when the outside temperature was 32.9 ° C. . It is thought that the room temperature was lowered by removing the heat stored in the film with the heat of vaporization by watering.

If the titanium oxide is kneaded in the film at 3 wt% or more, or aluminum deposition or stainless sputtering is performed, a visible light reflectance of 70% or more can be easily achieved. In use situations, it is desirable to use a highly reflective surface on the outer surface except at low temperatures.

  Moreover, in this invention, what fixed the tube 8 which can inject | pour water into a tube on both sides | surfaces of the film 10 with a reflective light-shielding function is shown. If water is poured into the tube 8 in a state of covering the crops to form a water bag, the side surface will be turned up by the wind and light will not be put into the coating. Further, since the pressure is controlled by the weight of the water, the degree of sealing is increased regardless of the unevenness of the soil, and the light shielding can be easily stabilized. In addition, it can drain water when it is not needed, and if used in such a way, it is less dirty, can be reused, is economical, can be easily detached, and the rain of the film presser is raining due to heavy rain. It can easily create a light-tight seal that is completely wall-stable and stable under any conditions, such as never flowing. As shown in (1) of FIG. 7, the tube 8 which can inject | pour water is fixed to the width direction both ends of the film 10 with a reflective light-shielding function which concerns on this invention. As shown in FIG. 2 (2), this film is used to cover a tunnel house structure, and when water is poured into the tube 8 in contact with the ground, this forms a water bag, which is uneven ground. Also seal without gaps.

  Next, the form of the covering frame will be described in detail. As shown in FIG. 8, the basic structure is an arch frame 11 arranged at a predetermined interval in the longitudinal direction of the rod, a beam frame 12 for connecting and fixing the apexes thereof, and a lying support column 13 arranged on the arch frame 11 at an appropriate interval. It consists of. The arch frame 11 of the covering frame column preferably has a width that can cover at least two asparaguses and a height that allows a person to stand and walk in the center. Such a coated frame support increases the strength of the frame, is difficult to collapse, can easily reinforce the prevention of lodging during the cultivation of the stock, there is no need to install a special frame support to grow white asparagus, light-shielding reflective film After overturning 10, it is not necessary to newly install an anti-falling support column for strain cultivation, which is efficient in terms of work. In addition, since the arch frame 11 is directly connected to the arch frame 11, the arch frame 11 can be prevented from falling even in strong winds. Moreover, since the film 10 with the reflection light shielding function is not overwhelmed, the structure is increased in strength and the frame interval is conventionally increased. There is an advantage that it can be expanded to about twice as large as that of the present invention, and the labor for installation is reduced. A person can stand and harvest white asparagus in the frame with a flashlight or cantera, so that efficient harvesting work can be performed, and according to the present invention, no earthing work is required, so 2 to 3 times a day. Only one harvesting operation is required. Furthermore, since the harvested white asparagus is not exposed to direct light, it does not change its color to yellow or brown and can provide an environment where high quality can be maintained.

In the present invention, when the reflective light shielding film is coated on the coating frame, a form is provided in which a partition that can be opened and closed by the film 10 with the reflective light shielding function according to the present invention is provided near the entrance. In this way, the entrance / exit partition has a double structure to prevent light leakage when a person enters and exits the frame. If it does in this way, coloring of white asparagus during cultivation by going in and out of a worker's frame can be eliminated.
Further, in the present invention, a peep hole 9 having an appropriate size as shown in FIG. 9 is provided at an appropriate position of the coated film 10 having a reflection / shielding function according to the present invention, and the periphery and a lid 9b for closing the hole are made of plastic. A magnet or hook-and-loop fastener 9a is provided, and the one having the function of easily opening or sealing the peephole is presented. When necessary, the viewing window is opened so that the darkness in the coating can be confirmed and the growth of white asparagus can be observed without entering the dark frame.

When the light-shielding coating is performed with a frame having the above-described requirements for the frame shape using the reflective light-shielding film having the light-shielding conditions and the room temperature condition in the coating, the following effects are obtained.
1) Since it is dark, weeds do not grow and weeding is unnecessary.
2) Since it is not exposed to sunlight, it can be cultivated with less transpiration of soil moisture and less irrigation.
3) It can work without crushing the soil, and there is no runoff of fertilizer due to rainwater, and a good soil environment for asparagus can be achieved.
For this reason, white asparagus cultivation using the film 10 with a reflection light-shielding function according to the present invention grows quickly and can grow thick and high-quality ones. In particular, when water is sprayed directly on the film 10 with reflection / light-shielding function at high temperatures in summer, or when water is sprayed with the film 10 with reflection / light-shielding function attached directly to the irrigation tube 5 according to the present invention, the room temperature of the coated inner surface becomes lower than the outside air temperature. In addition, it is possible to avoid summer high temperatures with a single film covering, and it is possible to easily cultivate white asparagus at a lower cost.

  Next, the white asparagus cultivation method of the present invention in which white asparagus is cultivated twice or more a year will be described. Cover the film with reflective light-shielding function at the time of spring buds, harvest white asparagus, cover the above-mentioned film with reflective light-shielding function and properly train the stock, and then cover the film with reflective light-shielding function again in summer Then you can harvest white asparagus at least twice. In particular, since the second time is early summer, it is an issue to raise the temperature in the reflective light-shielding film. In the northeast and northeast, if a film with a reflectance of 84% or more can be used, it can be cultivated by using a single film. In the south, it is necessary to sprinkle on the film.

Below, the result of having carried out this invention experimentally in the test plantation is shown.
[Experimental example 1] In May 2005, while asparagus was harvested at the Asparagus House in Fukushima Prefecture, it was 0.1 to 0.4 under 30,000 lux on one persimmon in the middle part of 3 畝 cultivation. Transmits light of looks (light transmittance 99.999967% to 99.998667%), and a 0.08mm thick film with different reflectance of the gray surface on the white and back surfaces of 85% tourism reflectivity, covering the lining of the house with a width of 5m This was carried out and pressed against the covering hem surface with an earthen bag. As a result, white asparagus could be cultivated in 5 days of coating. (See Photo-1)

[Experimental example 2] In June 2005, the harvest of green asparagus was completed in customary open-air cultivation in Fukushima Prefecture, and a tunnel house with a width of 1.2m, a depth of 3m, and a height of 1.5m was created in the asparagus under cultivation. Film A with 70% visible light reflectance that transmits 12-14 lux under 30,000 lux (light transmittance 99.960000% -99.953333%) and 0.1-0.06 lux under 30,000 lux (light transmission) White asparagus was cultivated by covering each film B having a visible light reflectance of 85% with a rate of 99.999967% to 99.999800%. At that time, a viewing window 9 which can be sealed when not required is 20 cm square on the wife surface, and the inner surface of the coating was observed. As a result, light leaked through the film in the house of film A. As a result of an investigation one week after covering, the asparagus edge was slightly pink. In addition, when the outside was 80,000 looks, the inside of the coating was 1200 lux conditions (light shielding rate 99.985%), as a result of observing asparagus through a little peeping hole 9, the asparagus head was a pale yellowish green .
In the film B house, the room temperature on the inner surface of the coating was 12 to 30 ° C., satisfying the temperature condition within the temperature range suitable for growth, and pure white asparagus could be cultivated. Immediately after coating from the viewing window, the inside of the coating was dark. In addition, it was confirmed that white asparagus floated up white when peeped just before harvesting, and that it was possible to observe growth without entering the field if there was a peep window. Asparagus discoloration, after the test was completed, the asparagus that turned white under 80,000 looks was left in sunlight for 1 hour, but did not discolor. As a result of investigating asparagus one month after harvest, white asparagus strain that turned white became a common stock when left exposed to direct sunlight, but asparagus strains that were yellowish green or pink were It became quite a green strain like a common stock, and it was easy to surrender, and normal stock cultivation was not possible, and the stock cultivation was delayed by about 10 days. Although the cultivation period was as short as 15 days, it was confirmed that the second crop could be harvested, and that it would become the same strain after harvesting as in conventional green asparagus cultivation.
Based on the above results, when combined with the conditions (white shading rate 99.99934%) grown in tunnel covering in Hokkaido from 1945 to 1949, the minimum shading rate for growing white white asparagus is required to be 99.9995% or more. As a result, it was found that the 95% shading described in the utility model does not result in white asparagus.

この結果から可視光反射率８５％白面で遮光率99.9999984％以上のフィルムを被覆し、外気温３５℃以下の条件であれば、散水と併用すればホワイトアスパラを栽培できる環境条件を得ることが確認できた。又外気温度が３０℃以下であれば、可視光反射率８５％白面で遮光率99.9999984％以上のフィルム単用で栽培できる結果であった。 [Experimental example 3] In August 2005, in our experimental farm field in Iwaki City, Fukushima Prefecture, a film with a visible light rumination rate of 84% white surface and a shading rate of 99.9999984% or more in the form shown in (4) of FIG. As a result of the coating and the evaluation test, the polyethylene irrigation tube was covered with an ultraviolet cut film, and the covered film was heat-welded at an appropriate interval and fixed directly to the reflective light-shielding film, from 11:20 to 11:50. As shown in Table 3, when the outside air temperature was 32.7 ° C., the room temperature at the position 50 cm above the ground dropped from 34.3 ° C. to 29.4 ° C., and it was confirmed that the temperature was lower than the outside air temperature.

From this result, a film with a visible light reflectance of 85% and a white surface of 99.9999984% or more is covered. If the ambient temperature is 35 ° C or less, it is confirmed that environmental conditions can be obtained that can grow white asparagus when used in combination with watering. did it. Moreover, when the outside air temperature was 30 ° C. or lower, the film could be cultivated with a single film having a visible light reflectance of 85% on a white surface and a light shielding ratio of 99.9999984% or more.

  [Experimental example 4] As a result of experiments conducted at our experimental farm in Iwaki City, Fukushima Prefecture for two months from June to August 2005, a house with a frontage of 2.7m and a depth of 10m was covered with a reflective light-shielding film on the bottom surface. A polyethylene tube having a width of 20 cm and a film thickness of 0.15 mm was provided on both sides of the reflective light-shielding film, and water was poured into the tube. When removing water, the coated light-shielding reflective film can be easily removed by removing water, and it can be used as a weight without the effort to move the soil, adjustment of the grounding due to bumps on the ground, and without the film flying or falling off by the wind. I was able to prove.

It is a figure which shows the laminated structure of the film with a reflective light-shielding function of this invention. It is a figure which shows the different laminated structure of the film with a reflective light-shielding function of this invention. It is a figure which shows the other laminated structure of the film with a reflective light-shielding function of this invention. It is a figure which shows the further different laminated structure of the film with a reflective light-shielding function of this invention. It is a figure which shows the laminated structure of the film with a reflective light-shielding function of this invention which lined the nonwoven fabric. It is a figure which shows the laminated structure example of the film with a reflection light-shielding function which has arrange | positioned the irrigation tube, and the watering form in a house. It is a figure which shows the laminated structure of the film with a reflective light-shielding function of this invention which has arrange | positioned the tube used as a water bag. It is a figure explaining the arch frame with a fall prevention column which coat | covers the film with a reflective light-shielding function of this invention. It is a figure explaining the film with a reflective light-shielding function of this invention which provided the observation window.

Explanation of symbols

1 Visible light reflection layer 2 Light shielding layer
2a Light-shielding layer kneaded with carbon black 2b Light-shielding layer kneaded with aluminum 3 Anti-fogging agent treatment layer 4 Non-woven fabric 5 Irrigation tube 6 Coating film 7 Non-woven fabric or net for fixing 8 Tube for water bag 9 Peep hole 9a Plastic magnet or fastener
9b Lid 10 Film with reflective shading function
11 Arch frame 12 Beam frame
13 Protrusion prevention prop

Claims (3)

A non-woven fabric is laminated or adhered to the innermost surface of a film formed by laminating a film having a visible light reflectance of 70% or more and a shielding layer using a concealing material such as carbon black, titanium oxide or aluminum, and A film for cultivation of white asparagus, which is applied or kneaded with an antifogging material and has a light transmission of 15 lux or less (light shielding rate: 99.95333%) or less under 30,000 lux.   The film for white asparagus cultivation according to claim 1, wherein the nonwoven fabric is locally bonded to the film.   The reflective light-shielding function according to claim 1 or 2, wherein a structure that covers at least 2 km of asparagus and has an asparagus support block directly connected to a frame having an appropriate size so that it can stand at the time of harvesting. A white asparagus-covered cultivation house that covers the attached film and is provided with a partition that can be put in and out of the entrance inner position with a film with a reflection light shielding function.

Images