JPH03139221A - Film for cultivating fruit tree and method for cultivating fruit tree using the same - Google Patents

Abstract

PURPOSE:To produce high quality fruits by joining one side edge of each microcellular film made of a thermoplastic resin material and film made of a synthetic resin and covering the ground surface with the resultant films excellent in moisture permeability and waterproofness for cultivating fruit trees. CONSTITUTION:A substrate (1b) for aerially transmissible reinforcing is superposed on one surface of each microcellular film (1a) having <=50mum average pore diameter and partially fused with heat to provide a filmy laminated product. The moisture permeability of the microcellular film is preferably >=1000g/m<2>.24hr. One side edge of each film made of a synthetic resin (1c) is superposed on one side edge of a microcellular film (1a) and fused with heat to afford films 1 for cultivating fruit trees. The synthetic resin film (1c) is preferably colored. The microcellular films (1a) and synthetic resin films (1c) are laid on the ground surface (G) so as to cover the root part of each fruit tree 3 with the microcellular films (1a) of the films 1 for cultivating the fruit trees and the outer peripheral part of the fruit trees 3 with the synthetic resin films (1c).

Description

Detailed Description of the Invention (&) Industrial Application Fields The present invention has excellent moisture permeability, waterproofness, and windproof properties, and by covering the soil surface of fruit trees, it prevents evaporation of soil moisture and the growth of weeds. A film for practical cultivation that controls the coloration of fruits, increases soil temperature, and obtains high-quality fruits at a low cost, and fruits using the same! The present invention relates to a method for cultivating T.

(1,) Conventional technology Traditionally, in the cultivation of fruit trees, the cultivation of fruit trees involves not only enlargement of branches and leaves and fruit, but also fruit production in a vinyl greenhouse from the late stage of ripening in order to increase the quality of the fruit, especially the sugar content of the fruit juice. Soil moisture is managed by artificially refraining from irrigation until the ripening stage.

In other words, if abundant water is supplied as the fruit approaches its ripening stage, the nutrients of the fruit tree, such as nitrogen, are easily dissolved and absorbed in the water, which causes the tree to shift toward vegetative growth, which improves fruit enlargement. The quality of the fruit may deteriorate due to thickening of the fruit skin, poor accumulation of fruit juice components, and bland taste.
This causes a decrease of 1. Therefore, attempts have been made to artificially manage soil moisture to a low level from the latter half of fruit development Y7 to the ripening stage by cultivating fruit in greenhouses.

However, greenhouse cultivation of fruit is expensive, and it requires a huge amount of labor to control temperature and moisture inside the greenhouse, and the harvested fruit is also expensive, so it is not very popular. This is the actual situation.

On the other hand, when cultivating fruit outdoors, it is impossible to control the natural phenomenon of rainfall, and the quality of the fruit is affected by the weather before harvest.

Therefore, the following methods have been proposed as means for solving these problems.

Namely, as a film for fruit tree cultivation, the soil surface is covered with a waterproof synthetic ATRRFT film such as non-porous polyethylene film or fine polyvinyl chloride film from the latter half of fruit growth to the ripening stage, and then the soil is covered with This is to manage moisture to a minimum.

In addition, as a film for fruit tree cultivation, holes of 500 μm or more are made by mechanical drilling in a waterproof synthetic resin film such as non-porous polyethylene film or polyvinyl chloride film, and the soil surface is covered with this perforated film. It is something to do.

(c) Problems to be Solved by the Invention However, in the method (■) above, the quality of the fruit is improved because moisture from rain is prevented, but the moisture in the ground turns into steam and the lower surface of the film covering the soil surface improves the quality of the fruit. As it accumulates in the water, the root hairs of trees growing underground look upward in search of moisture
The problem is that the upper layers of the earth become overly humid, causing root rot and inhibiting the growth of tree roots, resulting in weakened tree vigor and death.

In addition, the above method (■) uses a perforated film with an average pore diameter of 500 μω or more, which is good for water vapor permeation from underground, but when it rains, rain also passes through, making the fruit watery and reducing the sugar content. There are problems such as deterioration in the quality of the fruit.

The present invention prevents rainwater from entering the soil during the latter half of fruit growth and ripening, and also allows water vapor from underground to be freely released into the air by arranging a microporous film around the roots of fruit trees. By using a specific fruit tree cultivation film that prevents moisture from accumulating on the underside of the film, and also has moisture permeability, waterproofness, and windproof properties, and covering the soil surface where fruit trees are planted with it, A film for cultivating fruit trees that controls evaporation of soil moisture and the growth of 2I grass, improves the coloring of fruits, increases soil temperature to obtain high-quality fruits, and achieves low cost. Fruit using! The purpose of this study is to provide a cultivation method for

(d) Means for Solving the Problems In order to achieve the above object, the film for cultivating fruit trees of the present invention and the method for cultivating fruit trees using the same take the following technical measures.

The present invention will be explained in detail below.

That is, the film for fruit tree cultivation according to If ftfl requirement 1 is a film for covering the soil surface on which fruit trees are planted, and the film is made of a microporous film Σ synthetic resin! The -I+111M portions of the films are joined together.

Fruit trees to which the present invention is applied are not particularly limited, but specifically include mandarin oranges, pears, grapes, peaches,
Examples include apples, persimmons, mulberries, and walnuts.

Furthermore, the microporous film used in the present invention is not particularly limited as long as it has excellent moisture permeability, waterproofness, and windproofness. Although it may be made of a material, it is particularly preferable to use a thermoplastic plate.

The thickness of this microporous film is 10 to 500 μ-
If the thickness is less than 10 μm, the thickness of the film will be too high and may cause problems such as tearing when applied to the soil surface where fruit trees are planted, or damage during transportation and handling. However, if it exceeds 500μ, it is not only meaningless but also economically disadvantageous.

When this microporous film is laid on the soil surface,
Although it is moisture permeable, it does not allow rainfall water to pass through it (it has about 1 minute micropores).

Further, the synthetic 1F* film used in the present invention is not particularly limited as long as it is made of the above-mentioned synthetic resin, and its thickness may be set in the same manner as in the above-mentioned case. be.

The film for cultivating fruit trees of the present invention is obtained by joining the above-mentioned microporous film and the synthetic riffle resin film at one side edge of each other.

Although the method for producing this film for fruit tree cultivation is not particularly limited, a preferred method is to mutually connect one side edge of a long microporous film and a synthetic resin film. By overlapping the film and joining the overlapping parts, the film can be mass-produced continuously and economically without requiring any special technology. In this case, by using a microporous film with one or both sides reinforced with a breathable reinforcing base material, the microporous film will not be torn during film production and the generation of defective products will be prevented. In addition, the strength of the entire film can be significantly increased.

Also, the width of this joint is not particularly limited, but should be set to an extent that does not cause peeling of the microporous film and the synthetic terminology 91 film during glazing of the film. ! It is desirable to adjust the distance to 4 cm, and it is generally adjusted within a range of 2 to 20 cm from this point i.

By using this film for fruit tree cultivation, the microporous film part covers the root of the fruit tree, and the synthetic resin film part covers the outer periphery of the root, thereby preventing rainfall from the latter half of fruit growth to the ripening stage. It prevents water from directly entering the soil, and has good moisture permeability at the root area, allowing water vapor from the ground to freely release into the air, preventing moisture from accumulating on the underside of the film at that area. Root rot and decline in tree vigor can be prevented, and synthetic resin films can also be used to control the growth of weeds and color fruits. Furthermore, by using this film for fruit tree cultivation, it is possible to raise the soil temperature to obtain high-quality fruit, and it is also possible to achieve a significant cost reduction compared to the 71-cm cultivation of fruit.

In addition, the above-mentioned microporous films and synthetic resin films include
It may also contain commonly used antioxidants, ultraviolet stabilizers, antistatic agents, pigments, lubricants, fluorescent agents, and the like.

In the film for fruit tree cultivation according to the present [1Bn requirement 2], since the microporous film and the synthetic resin film are made of thermoplastic resin, it is possible to mass-produce products with stable quality economically.

The thermoplastic resin is not particularly limited, but includes, for example, polyethylene resin, polypropylene resin, polyethylene terephthalate resin, polyvinyl chloride resin,
It may be a film made of at least one resin selected from the group consisting of polyvinylidene chloride resin, polyamide avalanche, etc., that is, a single layer film or a composite film made of these 01 eaves.

Among the polyethylene resins mentioned above, especially linear low-density polyethylene resins are used for microporous films and synthetic 8! The production and processability of fat film is excellent, the production cost is low, and
This is most preferred because the strength of the obtained film is high.

The above-mentioned linear low density polyethylene 0 (fat is a copolymer of ethylene and a-olefin, and examples of the α-olefin include butene, hexene, octene, etc.).

The above-mentioned thermoplastic film may contain fillers, if desired, such as calcium carbonate, talc, clay kaolin, silica, barium sulfate, kaolin sulfate, aluminum hydroxide, zinc oxide, etc. , calcium oxide, titanium oxide, alumina, mica, etc.

The average particle size of the filler used is 30 μm or less, preferably in the range of 0.1 to 10 μm.

If the particle size is too large, the through holes will become large, whereas if the particle size is too small, agglomeration will occur and dispersibility will be poor, which is not preferable.

In the above film, the blending ratio of thermoplastic resin and filler is preferably in the range of 100 to 300 weight N parts of filler per 100 mff of thermoplastic resin,
By using such a blending ratio, microporous films with excellent mechanical strength, waterproofness and moisture permeability, synthetic resin 9J,
5i film easily! You can go there.

In addition, the thermoplastic film used in the present invention may contain additives to improve the kneading and dispersibility of the filler, to improve the moldability and processability, or to improve the strength of the film. Onfinter remover and softener may also be blended.

In this case, the blending ratio of the thermoplastic resin, filler, and olefin terpolymer or softener is thermoplastic!
100 to 300 parts by weight of filler per 100 parts by weight of fat
parts, olefin terpolymer or softener from 5 to 100
It is desirable that the amount is in the range of parts by weight, and by using such a blending ratio, a microporous film with even better mechanical strength, waterproofness, and moisture permeability can be produced extremely easily.

The above-mentioned olefin terpolymer is not particularly limited as long as it is a rubber-like material with a number average molecular weight of 5,000 to 800,000, and typical examples include ethylene, a-olefin, and non-conjugated double bonds. A copolymer consisting of a cyclic or acyclic structure (so-called E P D
M ) is used.

The thermoplastic microporous film used in the present invention is not particularly limited as long as it is a porous thermoplastic film formed by -axial stretching or biaxial stretching, and the microporous film can be directly formed by stretching. Alternatively, a microporous film may be formed by stretching (I) to obtain a microporous film, and then further eluting the soluble filler with acid, alkali, water, or the like.

By the way, in this invention, 775 of the microporous film and the synthetic film are the same as those in claim 1 of the present application.

In the fruit tree culturing film according to claim 3 of the present application, the average pore diameter of the microporous film is 50 μm or less, thereby preventing rainfall water from directly entering the soil from the latter half of fruit growth to the ripening stage, In addition, it has good moisture permeability, allowing water vapor from underground to be freely released into the air and preventing moisture from accumulating on the underside of the film, resulting in fruits with excellent quality such as high sugar content. In particular, it reliably prevents rainwater from entering the soil, has good moisture permeability, and effectively releases water vapor from the ground into the air, producing fruit with excellent waste quality. From the viewpoint of
μj is more desirable.

In the film for fruit tree cultivation according to Item 4 of this article, the strength of the film is significantly improved by reinforcing one or both sides of the microporous film with an air-permeable reinforcing base material. After the porous film is laid on the soil surface, the film will not tear even if you work on it (so you can work on your farm with peace of mind).

The breathable reinforcing base material used in the uniform is not particularly limited as long as it is breathable and improves the strength of the entire film.

Typical examples of this breathable reinforcing base material include:
Examples include porous plastic films such as heat-adhesive porous films and punting films, and porous substrates made of cloth, unwoven cloth, plus fibers, and metal fibers.

In addition, the above-mentioned microporous film and the breathable reinforcing base material can be joined by overlapping them and partially adhering or heat-sealing them, or by interposing a heat-adhesive porous film between the two. It may also be partially thermally bonded.

The area of this joint is 3 to 100% of the area of the film,
Preferably 5-90% I! It is desirable to form them approximately evenly over the entire surface.

If the area of the bonded area is less than 3%, the bonded area between the films is too small, causing partial delamination, and as a result,
The mechanical strength of the resulting film may be insufficient, and on the other hand, if 90% strength is achieved, the permeability decreases, causing moisture in the ground to turn into water vapor and accumulate on the underside of the film covering the soil surface. As a result, the normal growth of fruit trees may be hindered, and both are undesirable.

Incidentally, the area of the joint can be easily adjusted by, for example, adjusting the side area occupied by the convex portions of the metal uneven roll.

That is, when a film is passed between heated metal uneven rolls, the film comes into contact with the apex of the protrusions on the metal uneven rolls, and the film is bonded at the protrusions, but at the concave 8' IS point. In this case, since there is no contact between the film and the metal uneven roll, no joint is formed on the film.

The heat-adhesive porous film is not particularly limited as long as it is porous and exhibits adhesive properties when heated.

As the heat-adhesive porous film, one made of a hot-melt resin is particularly preferable because it has good heat-adhesiveness to the film and provides excellent reinforcing effects.

Specifically, for example, ethylene-vinyl acetate copolymerization and ethylene-isobutyl acrylate copolymer! Examples include ethylene-based hot melt resins such as ethylene-acrylic acid ester copolymerized υ4 frost, etc. Among these, ethylene-vinyl acetate copolymer resin and ethylene-acrylic acid ester copolymer resin are particularly excellent. It is preferred because it has adhesive strength, is inexpensive, and has excellent productivity and processability.

In the above ethylene hot melt resin, the vinyl acetate content is 8 to 40% by weight, and the melt index (Mr) is
is in the range of 0.9 to 20 and the melting point is 40 to 100°C, which is preferable because good workability and adhesive strength can be obtained.

``Uni heat adhesive porous film is obtained by obtaining a heat adhesive film by a known method, and then uniaxially or biaxially stretching the film, or by immersing the soluble filler in the film thus obtained in acid, alkali, or water. It can be obtained by methods such as elution and excavation.

Further, this heat-adhesive porous film may contain appropriate amounts of various additives such as antioxidants and antistatic agents.

In the film for fruit tree cultivation according to claim 5, the microporous film has a moisture permeability of 1000 gem2・24hrs.
From the above, the moisture permeability at the root of the fruit tree is extremely good, and the control of soil moisture at the root weeping area is extremely good, even under conditions where soil moisture tends to move upwards. This prevents moisture from accumulating on the underside of the film, resulting in fruits of superior quality, such as high sugar content, and preventing the root hairs of the tree from growing upwards.

In the film for fruit tree cultivation according to claim 6 of this W11111,
Due to the colored synthetic resin fJ1 film,
This produces the effects described below.

That is, as a synthetic wood film, a silver film made by vapor-depositing a metal such as aluminum on a synthetic a (Jllf film), or a silver film made by vapor-depositing a metal such as aluminum on a composite IRafrFi!l!! film is used. In addition, by coloring the synthetic snow tray film black or laminating a black film onto a synthetic resin film, it is possible to suppress weeds and increase soil temperature. This allows for earlier flowering.

In addition, in order to achieve the above object, in the fruit cultivation method of the present invention, the above-mentioned fruit tree cultivation film is used,
In this film, by covering the roots of fruit trees with the microporous film part and covering the outer periphery of the roots with the synthetic resin film part, soil moisture can be managed from the latter half of fruit development to the ripening stage. High quality fruits can be obtained economically.

(e) Function The film for cultivating fruit trees of the present invention can be used to cover the soil surface where the fruit is planted, thereby preventing rainfall water from entering the soil during the fruit stage and semi-ripe stage. In addition, it is possible to control the moisture content in the ground by controlling the evaporation of water vapor from the ground, thereby increasing the sugar content of the fruit, thereby making it possible to obtain fruits of excellent quality. In addition, the synthetic resin film suppresses the growth of weeds, improves fruit coloration, and increases soil temperature to promote early flowering. It has the function of combining the following.

Further, in the fruit tree cultivation method of the present invention, the above-mentioned fruit tree cultivation film is used, and in this film, the microporous film part covers the root part of the fruit tree, and the synthetic resin film part covers the outer periphery of the root part. This has the effect of controlling soil moisture from the latter half of fruit growth to the ripening stage.

(r) Examples Hereinafter, the present invention will be explained in detail based on Examples, but the present invention is not limited thereto.

As shown in Table 1, linear low-density polyethylene (polymer component) (M I 2 ) is used as a thermoplastic resin.

0, density 0.13), E as an olefin terpolymer
r'DM (trade name EPT9720, manufactured by Mitsui Petrochemicals), polybutene (number average molecular weight 126
0), calcium carbonate as a filler (average particle size 2 μm
,W! Fatty acid treatment) and stearic acid as a lubricant were blended in the proportions shown in Table 1, thoroughly stirred and mixed, and this) U compound was mixed with two screws! * Iso (TE M-50, Toshiba g↑
Obtained through sufficient crosstalk by Kaisha (manufactured by Kaisha)! IL7i! The product is granulated using a conventional method.

This composition was melted and formed into a film using a 65φ inflation extrusion mill, and the film thus obtained was uniaxially stretched using a roll stretching machine to obtain microporous films having the respective stretching ratios shown in Table 1.

In this case, the stretching conditions were a stretching temperature of 60° C., a stretching speed of 6 n/uin, and the stretching ratio was adjusted to a value of Pt5l by changing the speed ratio of the rolls.

The obtained microporous film had no stretching unevenness and was a porous film.

(Margins below) Production of a synthetic resin film The above-mentioned composition was melted and made into a film by C5φ inflation extrusion, resulting in a synthetic resin with a thickness of 100 μm! J film was produced.

Examples 1 to 5 Figures 1 to 3 show preferred manufacturing steps for the fruit tree cultivation film (1) of the present invention.

Figure 1 shows that a breathable reinforcing base material (1b) made of the above-mentioned composition is superimposed on one side of the above-mentioned microporous film (1a), and this is passed through a metal uneven roll at a temperature of 105°C. 20% of the total area is heat-sealed to obtain a film-like laminate. Next, in this film-like laminate, the negative side edge of the above-mentioned synthetic 1j resin film (IC) was placed on the negative side edge of the microporous film (1a) by 2 to 20 g each.
c+o1 In this case, 5c+n were overlapped, and the overlapped portions were passed through a metal uneven roll and then thermally fused, thereby obtaining the film for fruit tree cultivation of the present invention (see Figure A1).

Next, as shown in Fig. 2, this wide film is folded back at the heat-sealed point to form a three-layer supplement, and then, as shown in Fig. 3, this is folded over a gold III textured roll (2a) and a rubber roll ( 2b) It was put in between and pressurized, and then wound up.

In this case, microporous film (1a) and synthetic resin! If the thickness of the wrap part of the film (1c) remains unchanged, it will be difficult to wind it up neatly, but the breathable reinforcing base material (1b)
This allows the thickness difference to be absorbed, allowing for beautiful winding.

Using the obtained fruit tJ1 cultivation film (1), as shown in Figure 4, the soil surface (
G) 1 Test site to be laid between September 10, 1986 and October 30, 1988 (Kumamoto type), practical conditions, weed occurrence status, peel color and sugar content of mandarin oranges after harvest. (sugar content) was measured.

Incidentally, the amount of rainfall during this period was 90 m+o.

The results are shown in Tables 1 and 2.

Comparative Examples 1 to 4 Using the same composition as in the Examples, it was melted and formed into a film using a 65φ in-7 laser extrusion mill, and the film thus obtained was stretched in the same manner as in the Examples (Comparative Examples 1 to 4).
3), and a film obtained by mechanically perforating holes of 500 μm was used (Comparative Example 4).

Tests similar to those in Examples were conducted using these films.

The results are shown in Table 1 and Table tpJ2.

Margin below C) Second person (Note 1) In the f51 table, the stretching ratio was measured by the following formula.

(Note 2) In the fjS1 table, moisture permeability is JIS L
It was measured using 109 different methods.

(Note 3: In Table 1, waterproofness is JTSL-1092
(High water pressure method... i7N Water King method).

(Note 4) In Table 1, N dew on the back side of each film was observed with the naked eye at 40°C and 50% relative 12°.

(Note 5) In Table 1, the waterproofness during rain is 20 [n
m/br The waterproof properties of each film during rain have been changed.

Place a piece of blotting paper under each film and place 10 pieces of blotting paper on each film.
A puddle of +++to was made, and then each film was peeled off. If the blotting paper absorbed water, the waterproofness was judged to be poor, and if the blotting paper did not absorb water, the waterproofness was judged to be good.

(Note 6) In Table 1, the occurrence of weeds is synthetic υ! The growth of weeds under the so-called film (black) was observed with the naked eye.

(Note 7) In Table 2, the pericarp color was measured using a colorimetric colorimeter, and was determined by the a value of the l-1un sier-Lab ab color system.

(Note 8) In Table 2, sugar content was measured by refractometer reading.

From the results shown in Table 1, the waterproof properties of each Example were good, and no dew condensation was observed on the bottom surface of the filler nozzle at any time. On the other hand, the films of Comparative Examples 2 to 4 had extremely poor waterproof properties, and it was observed that water permeated through the film, and the film of Comparative Example 1 showed dew condensation.

Furthermore, from the results shown in Table 2, the fruit of each Example had better skin color and sugar content than the Comparative Example, and almost no weeds were observed.

(g) Effects of the Invention Since the present invention has been purchased as described above, it produces the effects described below.

In the fruit cultivation film according to claim 1, this fruit cultivation film is used, and the microporous film part covers the root part of the fruit tree, and the synthetic resin film part covers the outer periphery of the root part. By covering, it is possible to obtain fruits of excellent quality by controlling soil moisture to a minimum from the latter half of fruit growth until ripening, increasing the sugar content of the fruit. This prevents water from collecting on the underside of the film, promoting the normal growth of fruit trees.Furthermore, this film improves waterproof and windproof properties, and the synthetic resin film prevents the growth of weeds. This has the effect of suppressing the coloration of the fruit, increasing soil temperature, and advancing the flowering period, resulting in the production of fruits with high added value.

In the film for fruit tree cultivation according to claim 2, since the microporous film and the synthetic resin film are made of a thermoplastic tree layer, products with stable quality can be mass-produced economically. By using this film, we can obtain fruits of excellent quality.

In the fruit cultivation film according to claim 3, the average pore diameter of the microporous film is 50μII+ or less, thereby preventing rainfall water from directly entering the soil from the latter half of fruit growth to the TTL ripening stage, and It has good moisture permeability, which allows water vapor from underground to be freely released into the air and prevents moisture from accumulating on the underside of the film. Therefore, high quality fruits such as high sugar content can be produced stably. You can get it.

In the film for fruit tree cultivation according to claim 4, one or both sides of the microporous film is reinforced with an air permeable reinforcing base material, so that the strength of the film is dramatically improved. After the film is laid on the soil surface, the film will not tear even if you work on it, so you can work safely on the farm.

In the film for fruit tree cultivation according to claim 5, the microporous film has a moisture permeability of 1000 H/m?・Since it is 241 + rs or more, the moisture permeability at the root of the fruit tree is extremely good, and the control of soil moisture at the root is extremely good. Therefore, it is especially easy to move moisture in the soil to three directions. This prevents moisture from accumulating on the underside of the film, resulting in fruits of excellent quality, such as high sugar content, and preventing tree root hairs from growing upward.

The colored synthetic resin film in the fruit cultivation film for Yu Ao Qiu 6 < 31 can be used to color the fruit and suppress weeds, and to accelerate the harvest time of the fruit by increasing the soil temperature. It can be done.

The result of claim 7! In the cultivation method of No. 31, a film for fruit tree cultivation is used, and in this film, the microporous film part covers the actual root part, and the synthetic resin film part covers the outer periphery of the root part, so that the fruit grows in the latter half of fruit growth. By managing the soil moisture from the time to ripening, it is possible to economically obtain high-quality fruit.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing one embodiment of the film for fruit tree cultivation of the present invention, Fig. F52 is a perspective view showing the state where the synthetic resin film is folded back at the heat-sealed area, and Fig. 3 is the same. A side view showing the manufacturing method, and FIG. 4 are schematic diagrams showing the state of use. (1)...Film for fruit tree 3 culture, (1a)...Microporous Filno 1, (1b)...Base material for air permeability reinforcement, (1
c)...Synthetic resin film, (2a).../Huff uneven roll, (2b)...Rubber roll, (3)...
・IW state mandarin orange, (G)... soil surface.

Claims (7)

[Claims] (1) A film for fruit tree cultivation, which is a film for covering the soil surface where fruit trees are planted, and the film is made by bonding one side edge of a microporous film and a synthetic resin film. . (2) The film for fruit tree cultivation according to claim 1, wherein the microporous film and the synthetic resin film are made of thermoplastic resin. (3) The film for fruit tree cultivation according to claim 1 or 2, wherein the microporous film has an average pore diameter of 50 μm or less. (4) The film for fruit tree cultivation according to any one of claims 1 to 3, wherein one or both sides of the microporous film is reinforced with a breathable reinforcing base material. (5) The moisture permeability of the microporous film is 1000g/m^
The film for fruit tree cultivation according to any one of claims 1 to 4, which has a duration of 2.24 hrs or more. (6) The film for fruit tree cultivation according to any one of claims 1 to 5, wherein the synthetic resin film is colored. (7) A method for cultivating fruit trees, which comprises covering the soil surface on which fruit trees are planted using the fruit tree cultivation film according to any one of claims 1 to 6.