JP2753477B2 - How to grow eggplant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to durability, dustproofness, light transmittance,
Agricultural coating consisting of fluororesin film with excellent algae properties
Tunnel, pipe house, large house where materials were expanded
And the like. Conventionally, coatings for tunnels and pipe houses
Materials include polyethylene film, ethylene-acetic acid
Vinyl copolymer film, polyester film, chloride
Although vinyl resin films are used, vinyl chloride
Resin film is mostly used in terms of workability, price, heat insulation, etc.
is occupying. However, vinyl chloride resin film is a plasticizer
Bleed-out of plasticizer
Lumm surface is easily stained and light transmittance is reduced in a short time
There is a difficulty to do. In addition, each of the above films has
UV absorbers are blended to improve weatherability.
Due to deterioration due to sunlight, temperature, weather, oxidation, etc.
It usually needs to be changed in two years. Only
However, the film containing the ultraviolet absorbent in this way
Depending on the activity of the product, it blocks ultraviolet light,
For the cultivation of crops of interest (eg eggplants, certain flowers)
Unsuitable and bees and shimahanaa for pollination
Crops that need to fly squash (such as strawberries, melons,
It is not suitable for cultivation of watermelon, green pepper, etc. On the other hand, in recent years, house management
Full-scale large-scale housing for the purpose of expansion, extension of house life, etc.
Has also been adopted. This large house has more than 5 years
Conventionally, polyester resin plate, polycarbonate
-Carbonate resin plate, hard vinyl chloride resin plate, acrylic tree
Covering materials such as grease board, fiber reinforced plastic board, and sheet glass
However, these coatings are so thick that
Each must be spread using a large dedicated substrate
And the workability is very complicated and relatively expensive
There is a drawback. In addition, polyester resin plate, polycarbonate
Bonate resin plate, hard vinyl chloride resin plate, acrylic resin
Cracks easily occur on boards, etc. due to hail, etc.
However, there are drawbacks such as easy transmission. Plus these plus
UV absorbers are generally provided on the chipboard to improve weather resistance.
So that eggplants and flowers that require ultraviolet light
Must be crossed by crops or insects such as melons and strawberries.
Not suitable for growing important crops. In addition, sheet glass breaks
It is dangerous if you lose it.
It is necessary to further strengthen the framework of the house. Therefore, recently, economic efficiency, labor saving, and demand
Excellent durability, dust resistance, light transmittance, etc.
And can be extended for a long period of time.
General-purpose large
Easy installation and comparatively inexpensive mounting on a mouse
There is a strong demand for the development of coating materials that can be used. Book
In order to respond to such demands, the inventors have developed various synthetic
As a result of examining the resin material, the fluororesin
Conventionally for agricultural use in all aspects such as strength, flexibility and light transmittance
Superior to synthetic resin used as coating material
Film with characteristics, made from fluororesin
Requires no UV absorber to improve weather resistance
Also have excellent weather resistance, large mechanical strength,
Resistant to rain and hail, and resistant to temperature changes and oxidation
It can be extended for a long period of time.
Sunlight in the infrared and infrared regions is well transmitted, and tunnels and pipes
Easy to extend to large houses, not to mention houses
Can not be used because of color and pollination
For a wide variety of crops without any restrictions on former crops
They have found that they can be used and have completed the present invention. Thus, according to the present invention, the fluororesin resin
Eggplant is applied under the agricultural coating material
A method for cultivating eggplant characterized by cultivation is provided.
You. The foot used for the agricultural covering material of the present invention
Is obtained by the polymerization of olefins containing fluorine.
Is a general term for synthetic resins used in the present invention.
Fluorine content of 45% by weight or more, especially 50% by weight or more
Are preferably used. As such fluorine resin
Is, for example, an ethylene-tetrafluoroethylene copolymer
, Ethylene-chlorotrifluoroethylene copolymer
Body, hexafluoropropylene-tetrafluoroethylene
Copolymer, perfluoroalkyl vinyl ether-
Tetrafluoroethylene copolymer, polyvinylidene fluoride
Den, polyvinyl fluoride and the like.
Any of these can be used, and among them, ethylene-
Tetrafluoroethylene-based copolymers are preferred. Ethylene-tetrafluoroethylene copolymer
Coalescence mainly consists of ethylene and tetrafluoroethylene.
(The molar ratio of ethylene / tetrafluoroethylene is generally
Between 40/60 and 60/40), and if necessary
And a small amount (usually 10 mol% or less) of the third comonomer.
Component is copolymerized, and in the present invention, in particular,
The content molar ratio of styrene / tetrafluoroethylene is 40 /
60-60 / 40, preferably 45 / 55-55 / 45
And the formula CH_Two= CH-C_nF_{2n + 1}(here
Wherein n is an integer of 2 to 10.)
Alkyl vinyl monomer units (e.g., CH_Two= CH-C
_FourH₉Or CH_Two= CH-C₆H₁₃Units derived from)
The content is 0.1 to 10 mol%, preferably 0.3 to 5 mol.
% In the range of ethylene-tetrafluoroethylene
Copolymers are preferably used. This ethylene-tetraf
Fluoroethylene copolymers are known per se.
For example, the method described in JP-B-59-50163
Asahi Glass Co., Ltd. as a commercial product
More "Aflon^RIt is marketed under the trade name "COP"
Can also be used. [0008] The film from the fluororesin described above
The molding is performed according to a method known per se, for example, an extrusion molding method,
It can be performed by an inflation molding method or the like.
At the time of film forming, if necessary,
Coloring agents (e.g., titanium oxide, zinc white, calcium carbonate,
Precipitated silica, carbon black, chrome yellow, black
(Tarocyanine blue, phthalocyanine green, etc.)
Can be combined. In addition, the inside of an agricultural house is generally
High temperature and high humidity, condensed water drops adhere to the ceiling and inside the walls
At least the surface of the film inside the house
Is preferably treated with a drip-free agent. With the drip-free agent that can be used
Of hydrophilic polymers, surfactants or hydrophilic polymers
What mixed the surface active agent is mentioned. Hydrophilic polymer
Is, besides polyvinyl alcohol, -SO_Four,
-SO_ThreeH, -COOH, -NH_Two, -CN,-(OCH_Two
CH_TwoIncludes polymers having generally hydrophilic functional groups such as
And surfactants such as anionic and cationic
Any type of system or nonionic system may be used. [0009] If the film is too thin, it may break or break.
If it is only uneconomical to get too thick,
Film handling and subsequent handling (cutting, gluing, stretching)
Inconvenience), and the light transmittance also decreases.
Because of the possibility, generally 10 to 300μ, preferably
Conveniently it is in the range of 20-200μ. [0010] The fluorine resin film provided by the present invention
Is used as a coating material for agriculture.
Similarly, tunnels and pipe harnesses are used to grow crops.
Not only for us, but also for full-scale large houses
it can. Thus, the fluorine provided by the present invention
Agricultural coating materials made of resin film are described below.
Various remarkable features not found in conventional agricultural coating materials
It has a function and effect, especially for agricultural fields,
It is extremely large to contribute to the field. (1) The agricultural covering material of the present invention
Weather resistance is significantly higher than that of synthetic resin agricultural materials
Excellent in durability and durable, even for long-term expansion of 5 years or more
Can withstand. Therefore, the labor of re-placing is greatly reduced
It can be reduced and economical. (2) The agricultural coating material of the present invention is a plasticizer
It is very flexible without using a
Very little adhesion of dust (excellent in dust resistance). Follow
Even if the film is extended for a long time, the light transmittance of the film is extremely reduced.
It can be used for a long period of time. (3) The agricultural covering material of the present invention
Despite the thin film shape, the mechanical strength is large
Flexible and resilient, withstands weather and hail outdoors
Because it can be used, it can be used for a large-scale house. I
Or, the agricultural covering material of the present invention is a flexible material as described above.
Because it is in the shape of an illuminator, it can be used in a large-scale house.
At this time, remove the conventionally used synthetic resin plate or glass plate.
It does not require special components like when attaching
, Easy to install with inexpensive instruments such as binipets
The workability is extremely good. (4) The agricultural covering material of the present invention is completely
Surprisingly, a great advantage that there is no adhesion and propagation of algae
There is. Generally, the inside of a tunnel or house is hot and humid.
And under conditions where microorganisms and plants can easily proliferate. Algae
Kinds are no exception, and tunnels where films are spread
And houses, the algae from the part of the inner surface that touches the ground
Propagation phenomena are often seen. Release the growth of algae
When it is placed, it grows steadily upward along the inner surface of the film
Iki, remarkably obstructs the light transmission of the film, tunnel
And damage to the growth of crops in the house. Algae is surface water
Microscopic creature that lives inside and has chlorophyll
They have the ability to synthesize and are often covered with sticky substances.
Algae on the film are physically rubbed
It is difficult to remove. Conventionally, a film on which algae have been generated is discarded.
Or dry it and wait for it to come off naturally.
It is difficult to do so even in a large house
Therefore, it was strongly desired to develop anti-algal measures. However, the agricultural covering material of the present invention has a long length.
Algae adhesion and propagation are all
And especially suitable for large houses
Was found. (5) Further, the agricultural covering material of the present invention.
Requires no UV absorber as a weather resistance improver
Are extremely excellent in weather resistance, not only in the visible light area,
Conventionally, it transmits ultraviolet and infrared rays well.
There is a limit on the cultivation in facility cultivation in tunnels and houses.
The agricultural coating material of the present invention is also used for ivy crops.
By doing so, it can be made possible. For example, an eggplant for agricultural use which shields the eggplant from ultraviolet rays.
When cultivated under cover of covering material, eggplant fruit yield, fruit
Size is good, but the fruit color is pale (eggplant color)
Becomes thin) and the commercial value is completely
Although it disappears, eggplant can be removed under the coating of the agricultural covering material of the present invention.
When cultivated, the above disadvantages are completely resolved, and harvested by open-field cultivation
Harvest eggplant fruit with the same fruit color as the eggplant fruit
And also good fruit yield and fruit size
It will be good. In addition, gentian, peony, riatori
Flowers, such as watermelon, yellowtail, and statice, have UV shielding properties
Good growth of flowers when cultivated under agricultural covering material
However, the flower color tends to be pale and the commercial value tends to decrease
Cultivates the flowers under the coating of the agricultural covering material of the present invention.
Then, it has the exact same flower color as the flower color obtained by open-field cultivation
Flowers can be harvested. Further, for pollination, honey bees and zebra flies
Strawberries, melons, watermelons, pima that need to be skipped
The ultraviolet-shielding agricultural coating material
When cultivated under timber cover, the fruit set rate is insufficient and the fruit
The occurrence of malformed fruits may occur, making the plant unsuitable for cultivation.
However, the plant is cultivated under the coating of the agricultural covering material of the present invention.
Then, the fruit set rate is improved, and the occurrence of malformed fruit
The amount of fruit, the size of the fruit, etc.
There are advantages such as improvement. In addition, the "pollination seedling plant"
"Things" are cultivated using flowering insects, such as bees, as pollination media
Plants, such as melon, miscellaneous melon,
Cucurbitaceae such as Wauri, Kiuri, Watermelon, Prince Melon
Plants; Solanaceous plants such as pumpkin; Rosaceae plants such as strawberries;
Rosaceae plants such as cherries, peaches, apples, pears and loquats
Thing; grape plant represented by grape;
Citrus, navel, iyokan, etc.
And the agricultural coating material of the present invention is particularly preferably used.
Plants that can be used are Cucurbitaceae, Solanaceae, Rosaceae,
Among them melon, miscellaneous melon, prince melon, watermelon, Cabo
Jia and strawberries. Hereinafter, the present invention will be described with reference to Examples and Reference Examples.
This will be described more specifically. [0024] 【Example】 Reference Example 1 In a 10 l autoclave,
3.46 kg of fluoromethane, trichlorotrifluoroeta
6.52 kg and t-butyl peroxyisobutyrate
2.38 g were charged, and then futrafluoroethylene 12
26 g, 82 g of ethylene, and perfluorobutyl ethyl
(CH_Two= CH-C_FourF₉) Charge 26g. This mixture
Copolymerization while maintaining the reaction temperature at 65 ° C with sufficient stirring
Allow the reaction to take place. During the copolymerization reaction, tetraf
Fluoroethylene / ethylene / perfluorobutylethylene
Gas mixture with a molar ratio of 53 / 46.3 / 0.7
Polymerization pressure is 15.0 kg / cm^TwoTo hold. 46 after 5 hours
0 g of a white copolymer was obtained. The copolymer is C_TwoF_Four/ C_Two
H_Four/ CH_Two= CHC_FourF₉Is 53/46.
3 / 0.7, flow start temperature 267 ° C, thermal decomposition start
The temperature was 360 ° C. The ethylene-tetrafluoroethyl obtained above
Ren-based copolymer (hereinafter sometimes abbreviated as “ETFE”)
Extruded at a resin temperature of 320 ° C.
Lum manufactured. The obtained film was used as a coating material No. 1.
And subjected to various tests, and the results are summarized in Table 1 below.
Shown. Comparative Examples 1-4 Six Light Three Nine (Polyester manufactured by Teijin Limited)
No.2 (compared to super durable agricultural hard film)
Example 1) and set the bon set (tomato manufactured by C.I.
-Biaxially stretched hard agricultural bifilm for cultivation of cucumber, thickness of 0.
1 mm) of the coating material No. 3 (Comparative Example 2)
(Mitsubishi Chemical Vinyl Co., Ltd.
Quality agricultural bifilm, thickness 0.1mm) was used as the coating material No. 4 (comparative example).
3) and Noviace (Mitsubishi Kasei Vinyl Co., Ltd.
Agricultural bifilm, thickness 0.1 mm) was coated with No. 5 (Comparative Example 4).
And conducted various tests in the same manner as in Reference Example 1.
The results are shown in Table 1 below. The above-mentioned coating materials No. 1 to No.
The over-curve is shown in the attached FIG. Reference Examples 2 to 5 NEOFLON FEP Film NF-0050 (Daikin Industries
Hexafluoropropylene-tetrafluoroethylene
Coating film No. 6
(Embodiment 2) is referred to as Neoflon PFA film AF-00.
50 (Daikin Industries, Ltd.
Tertetrafluoroethylene copolymer film, thickness
0.05 mm) as the covering material No. 7 (Example 3).
H_Two(Mitsubishi Yuka's polyvinylidene fluoride film, thickness
0.05 mm) as the covering material No. 8 (Example 4).
00SG40TR (Polyfluorinated vinyl film manufactured by DuPont)
Lum, thickness 0.05 mm) as the coating material No. 9 (Example 5)
Various tests were carried out in the same manner as in Example 1, and the results are shown in the table below.
-1. Various tests performed in the reference example and the comparative example were performed.
The test method and evaluation method are as follows. (1) Evaluation of weather resistance   Growth A shop facing the south side and inclined at 45 ° to the plane
Expose the coating material (film) on the external exposure table and
At the point when the time has passed, remove each part and film
And the residual ratio of elongation at break is evaluated. [0031] (Equation 1) [Evaluation criteria] 5: No change in appearance, and the residual elongation rate is 80% or more
of 4: No change in appearance, residual elongation rate is 60 to 80%
Less than 3: Change in appearance such as discoloration was observed, and residual elongation was 40.
More than ~ 60% 2 ... change in appearance such as discoloration is observed on the entire surface, and residual elongation
Is in the range of 20 to less than 40% 1 ・ ・ ・ Appearance change such as discoloration was observed on the entire surface, and residual elongation rate
Less than 20%   Tear strength For each film removed from the exposure table above,
The tear strength was measured using a Mendorf Tear Tester, and the tear strength was measured.
Evaluate the remaining rate. [0033] (Equation 2) [0034] [Evaluation criteria] 5: Those having a tear strength residual ratio of 80% or more 4 ... も の Within the range of 60% or more to less than 80% 3 ... 〃 In the range of 40% or more to less than 60% 2 ... に Within the range of 20 or more to less than 40% 1 ... の も の Less than 20%   Impact strength For each film removed from the exposure table,
The impact strength is measured with a testing machine, and the residual ratio is evaluated. [0035] (Equation 3) [0036] [Evaluation criteria] 5: Those with a residual impact strength of 80% or more 4 ... も の Within the range of 60% or more to less than 80% 3 ... 〃 In the range of 40% or more to less than 60% 2 ... に Within the range of 20 or more to less than 40% 1 ... の も の Less than 20% (2) Evaluation of dust resistance Each object removed from the exposure table for the evaluation of (1) above
The light transmittance at a wavelength of 550 nm was measured for the covering film.
It was measured. The higher the transmittance value, the better the dust resistance
You. (3) How to use a film of agricultural covering material
How to fix the film to the house body when spreading
Aggregate (commonly referred to as vinylet)
Between the house aggregate and the holding spring bracket
When expanding the film using
Evaluate the difficulty of construction. [Evaluation criteria] 5 ... Construction works as well as general agricultural PVC film
It is easy. [0039] 4 ... Construction is slightly more difficult than general farming. [0040] 3 ... Construction is possible, but wrinkles are easily formed. [0041] 1 ・ ・ ・ Film cannot be fixed and construction is not possible
Noh. (4) Dropping property A coating type dropping agent is applied to the inside of the film,
Covered on a beaker containing warm water and leave it for 2 months
Hold and observe drip retention for 2 months. [0043] [Evaluation criteria] 5: Those having an antifogging deterioration area of less than 10% and completely maintaining the drip property 4 ... 〃 Within the range of 10 or more to less than 30% 3 ... 〃 Within the range of 30 or more to less than 50% 2 ... 〃 In the range of 50 or more to less than 70% 1 ... も の 70% or less and no dripping property (5) Hail resistance Exposing the film to an outdoor exposure table installed in the same manner as (1) above
After exposure of the hail with a diameter of 5-7mm for 10 minutes,
Evaluate appearance. [Evaluation Criteria] 5: No holes or tears occurred. 3. There are traces of holes and tears. 1... There are holes and cracks. (6) Anti-algal properties Spread agricultural coating materials on agricultural houses,
Mato cultivation in two crops (January 1985-1987)
(April), and algae occurred on the side and wife of the house,
Observe the adhesion. [Evaluation criteria] 5 ... No adhesion of algae. 3 ... There is some adhesion of algae. 1 ... A large amount of algae adhered and materials became opaque
I'm wearing [0051] [Table 1]Example 1 and Comparative Examples 1-4 (Strawberry cultivation
Experiment) Parent strain of strawberry (breed of Hokko early) harvested in early November
Cultivated in a greenhouse, and in late August of the following year
And continued cultivation, a runner was generated
As it came, I planted it in a 12cm pot in mid-July. 240 tsubo
(Width 5.3m, height to ceiling 2.6m, length 150m)
Ridges (ridge width 1m40cm, ridge height 20c) in 4 pipe houses
m, passageway 70 cm) and cultivated according to the customary method. Reference to each pipe house on September 20
Coating material No. 1 prepared in Example 1 and coating materials of Comparative Examples 1-4
No. 2 to No. 5 were used for coating. Film of each house
Was coated as follows. That is, the coating material No. 1 is housed in the house A,
In the case B, the covering material No. 2 is used, and in the house C, the covering material No. 3 is used.
, House D has coating No. 4 and House E has coating
Cover the entire house in the same way as No. 5
Was. The furrows in the house are made of commercially available polyethylene.
Black multi-film (trade name “Yukaka Multi” 20μ thickness Mitsubishi
(Made by Yuka). At the same time, the strawberries that were temporarily planted
Seedlings were planted at a rate of 40 plants / tsubo. On November 15, ethylene /
Film made of vinyl acetate copolymer (trade name `` Mitsubishi Yukano Saku
(Bi thickness 30μ manufactured by Mitsubishi Yuka) and continue cultivation
Was. Winter temperature is around 5C (at night), 22-23C (daytime)
Atsuta. [0058] Harvesting starts in early January of the following year until mid-May.
The harvest was continued. Irrigation was performed once a week in principle. At the time of pollination, the boxes of bees were housed in houses A, B,
Set to C, D, E. Table 2 shows a selection of 20 houses per house.
(The survey period from January 15 to 2)
March 14). Further, using the same house for growing strawberries,
The second and third years are carried out, and the harvest amount (commodity fruit harvest amount
Are shown in Table-2. House covering material is affected by wind, hail, etc.
When it was damaged, it was repaired with the same coating material and cultivation was continued. When the first year of strawberry cultivation is completed
The algae adhesion status was investigated. House A (Reference Example 1) is all
There was no adhesion of alga, but houses B, C, D and E
(Control Examples 1, 2, 3 and 4)
Algae adhesion was observed a lot. Survey method (1) Number of bees flying: box of bees (approximately 10,000)
3rd morning after setting about 1m from Us entrance
Twice and twice in the afternoon at the exit of the house.
From the opposite side) fly into the house and count the number of active bees
Observed with eyes. (2) Bee flying state: Measurement of (1)
When done, observe the activity of the bees with the naked eye. (3) Malformed fruit rate (%) Percentage (number) of malformed fruits in all harvested fruits. (4) Yield (commercial fruit yield index): Example 1
Yield index when the product yield in the first year is 100. [0068] [Table 2] Example 2 and Comparative Examples 5 to 7 (Cultivation of melon)
Experiment) July 25 melon seeds for rootstocks (seedling emerald zem)
One seed in the center of the pot, and the next day, a melon seed for the scion
Seed (variety Sunday melon) in the same pot and finish sowing
Afterwards, create a tunnel with cold gauze and protect it from oil worms and fill it with water
Give a minute. Sunday melon germinated on July 29, the next day
Cotyledons developed and on August 1 the fungicide Topudin M (Nippon Soda)
Is diluted 1500 times and sprayed. Rootstock on August 2
When the emerald zem leaves reach 0.7
We call a Sunday melon for wood and graft it. Grafted
On the day, 8 pieces of cold gauze are layered and shaded.
On the leaves, cut the roots of the ears on August 12,
Sun fungicide Mannebudaisen M (active ingredient Manganese,
Ethylene, biscithio, carbamate: Tokyo Organic Chemical
(Manufactured by Kogyo Co., Ltd.) diluted 600 times, to 1-2 seedlings
Grow. During this seedling raising period, the morning moisture is sufficient to dry in the evening.
give. Each of the pipe houses F, G, H and I (2
40 tsubo: ridge in frontage 5.3m, depth 150m, height 2.6m)
(Height 30cm, width 70cm, furrow 60cm)
120 kg / 1 with Nematsu 495 (Kanematsue sales) as original manure
0 are fertilized, and the surface of the ridge is black multi-film (black
(Polyethylene film: thickness 30μ)
One or two melon seedlings were planted at a rate of 1500 per 10 ares.
Planted to become a book. Covering of each coating material of pipe house
Covering was performed one week before planting. The coating of the coating material on each house is performed as follows.
Was. House F has a coating material No. 1 and houses G and H
And I are coated with coating materials No. 2, No. 3 and No. 4, respectively.
Coated. Spraying the fungicide Manneb Theisen M in mid-August
When the true leaves reach 5 or 6 pieces, invite them with tape,
Cultivation, and in late August when the true leaves grow to 20-22 pieces
did. At this time, the female and male flowers will blossom.
They were crossed with bees set in House F. After mating, number
The melon has settled in a day. When this fruit grows to egg size,
One fruit of 45-50 cm from the ground was left and dried.
Fruits are ball-dropped. Early September Fungicide Mannebutaisen
M was sprayed, and nets occurred on the epidermis of the fruit.
In a paper bag, the mid-September epidermis grew to 8 minutes net.
So take the bag and wipe the ball. After that, the sun will hit well
In late September, sprayed the fungicide Mannebtaisen M in late September.
Cloth. Investigation of the fruit set rate of melon in mid-August
Is shown in Table-3. Further, cultivation of melon using the same house
In the second and third years, and survey the rate of fruit set.
The results are shown in Table-3. At the same time, the yield was also investigated. House F (Implement
In Example 2), the yield was almost the same as in the second and third years
However, in House I (Comparative Example 7), the harvest was 2 years and the harvest was 1 year.
Compared to half. At the end of the first year of melon cultivation
Investigation of the algae adhesion situation at House F (Example
2) showed no adhesion of algae, but house G, H and
In I (Comparative Examples 5, 6 and 7), all were on the side of the house.
Many algae adhered to the head and wives. Survey method (1) Number of bees flying: box of bees (approximately 10,000)
3rd morning after setting about 1m from Us entrance
Twice and twice in the afternoon at the exit of the house.
From the opposite side) fly into the house and count the number of active bees
Observed with eyes. (2) Bee flying state: Measurement of the above (1)
When performing measurements, observe the activity of the bees with the naked eye. (3) Fruit setting rate (%): at the 9th to 12th knots
Rate (average of 50 bottles). [0078] [Table 3] Example 3 and Comparative Examples 8 to 10 (planting of eggplant)
Culture) Eggplant seedlings (genuine leaf 2)
53kg of original manure (13, 25 phosphoric acid, 15 potash)
House A (Example-3), house B,
House C, House D (Comparative Examples 8 to 10), ridge width 1.2m,
40-45cm between plants, single-row planting, 2,000 per 10a
The planting will take place in mid-March. House heat target: 26-30 ° C during the day, 1 at night
Cultivation is performed at 2 to 15 ° C and with continuous irrigation. Disease
Insect control is achieved by spraying a 500- to 1000-fold solution of toppin.
Remove. Eggplant fruits can be harvested about 40 days after planting
The shape of eggplant fruit harvested 60 days after planting
The condition is shown in Table-4. [0082] [Table 4]Example 4 and Control Examples 11 to 13
Cultivation) Don't root your gentian stock on the days of early spring weather
Digging, dropping easily fallen soil, wrapping with sawdust and refrigerated
Store in a refrigerator at 0 ° to -2 ° C as a target. In the middle of October, the house A (Example 4) and
Planted in Houses B, C and D (Control Examples 11 to 13). The floor
Fully watered and maintained at 15 ℃ inside and outside, fertilization per 1a
100kg compost, 1kg each of nitrogen, phosphoric acid and potash
/ A Complete waste fertilization, floor width 90 to 100m, strip 20c
m, planted as 10 cm between plants. Water enough
Cultivated in Japan (control of gentian) as cut flowers in mid-February
To harvest. Table 5 shows the flower colors. [0085] [Table 5] Example 5 and Comparative Examples 14 to 16 (Kikiyou
Cultivation) Kikyo was housed in House A (Example 5) and Houses B, C and D
Planted in mid-September in (Comparative Examples 14 to 16) and controlled by the usual method
Cultivate. At the end of December, the cut flowers of Kikyo were harvested,
Table 6 shows the results of the investigation. [0087] [Table 6]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a coating material No. used in Examples and Comparative Examples.
It is a figure of the light transmission curve according to wavelength of No.1, No.2, No.3, No.4, and No.5.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 27/12 C08L 27/12 // C08J 5/18 CEW C08J 5/18 CEW

Claims (1)

(57) [Claims] An ethylene-tetrafluoroethylene copolymer having a molar ratio of ethylene / tetrafluoroethylene in the range of 40/60 to 60/40 and containing the third comonomer unit in an amount of 0.1 to 10 mol% or less. A method for cultivating eggplant, comprising cultivating eggplant in a facility under a covering with an agricultural covering material comprising a polymer film. 2. The content molar ratio of ethylene / tetrafluoroethylene is in the range of 45/55 to 55/45 and the formula CH _{2
= CH-C n F 2n +} 1 ( wherein, n represents an integer of 2 to 10) the content of perfluoroalkyl vinyl monomer unit represented by in the range of 0.1 to 10 mole% ethylene - 2. The method according to claim 1, wherein the eggplant is cultivated in a facility under a coating with an agricultural covering material comprising a film of a tetrafluoroethylene copolymer.