JPH0537048U - Agricultural multi-film - Google Patents

Abstract

(57) [Summary] [Purpose] To promote the growth of agricultural crops, especially vegetables, and to control the rise in soil temperature by blocking sunlight and prevent weeds, insect control, and fungal reproduction. [Structure] A transparent polyethylene film is opaquely printed with black ink and an appropriate circle or polygonal non-printed portion is provided at an appropriate interval to provide a sun-transmissive / impermeable zone. [Effect] Excessive sunlight irradiation on vegetables, suppression of inappropriate rise in soil temperature, retention of necessary night soil temperature, prevention of weeds and fungal growth, and excellent insect repellent effect.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention is an agricultural multi-film that promotes the growth of agricultural products, suppresses the rise in soil temperature, and prevents the occurrence of weeds.

[0002]

[Prior Art]

 Generally, mulching is used for the purpose of preventing water retention in soil and prevention of fertilizer runoff, etc. Normally, transparent polyethylene film is used. For the purpose of promoting the growth of agricultural products, aluminum or other metal powder is vapor-deposited on a transparent polyethylene film, or aluminum foil and a transparent polyethylene film are laminated to prevent the sunlight from spreading in the longitudinal direction. There is a multi-film in which a permeation zone and a permeation zone are provided and a black film is laminated on a black polyethylene film and a reflective film layer on the surface, and holes are perforated so as to have an interval suitable for the type of crop.

[0003]

[Problems to be solved by the device]

 The transparent polyethylene film, which is the most common type of multi-film, causes a high temperature rise in the summer due to the sunlight passing through it, which causes an unsuitable high temperature condition for the growth of crops, and it also causes excessive growth of cultivated crops. Sunlight is radiated on the trees, which not only accelerates the growth of cultivated crops but also has the adverse effect of promoting the growth of other weeds and the reproduction of insects and fungi. Next, aluminum foil and transparent polyethylene film laminated together, or aluminum or metal multi-film deposited on transparent polyethylene film prevents the rise of ground temperature and is excellent in sunlight reflection. The vapor-deposited layer is made of aluminum foil, which is vulnerable to wind and rain, and easily peels off when exposed to sunlight.

[0004]

[Means for Solving the Problems]

 Black polyethylene film and a multi-layer film with a black film laminated on the reflective film layer on the surface shield sunlight and reflect it at a high ratio, are irradiated to agricultural crops and promote growth, which is effective for growth and transmission. The sunlight is also absorbed by the black film and suppresses the rise in soil temperature, preventing sunlight from penetrating to prevent weeds and suppressing the growth of insects and fungi, while the amount of transmitted light is small, so there is sufficient sunlight on the ground. Does not irradiate, and does not affect soil, roots, etc. Furthermore, laminating the reflective film and the black film increases the wall thickness, which is not preferable for maintaining a practical price. That said, it is extremely difficult to discharge a wide reflective film and a black film from an extruder die and laminate them into two layers to form an extremely thin film, which requires a special device and is extremely difficult. The present invention has been made to solve these drawbacks.

[0005]

[Means for solving the problem]

 An opaque print with black ink is applied to the upper surface of a wide and long transparent polyethylene film, and the same circles or polygonal shapes are not printed at appropriate intervals, so that the sunlight necessary for the growth of crops can be obtained. By providing the permeation zone for permeation and the impervious zone that suppresses the rise of soil temperature and prevents the growth of weeds, insects and fungi, the multifilament for agriculture that compensates for each other's defects is provided.

[0006]

【Example】

 Embodiments of the present invention will be described below. FIG. 1 is a plan view of an agricultural multi-film (1) of the present invention. The thermoplastic resin used in the present invention is a low-density polyethylene resin. The low-density polyethylene resin is supplied to a die of an extruder, and when it is discharged from the die, it is formed into a tube with a thickness of 0.02 mm and a circumference of 2 m60 cm. While molding, the left and right edges are cut and two upper and lower sheets, that is, a sheet of 1 m30 cm is continuously molded, and at the same time, two layers are printed with black ink on both sides (however, as shown in FIG. A circular portion having a diameter of 25 cm and a portion 35 cm from the edges on both sides are not printed at intervals of 40 cm in each direction.) The print is dried and wound. This is the agricultural multi-film (1) of the present invention, but the transmission of sunlight in the impermeable zone (3) printed with black ink is 5% or less with respect to the amount of transmission in the transparent portion, that is, the transmission zone (2). It means the amount of sunlight transmitted. Further, the planting part (4) of the crop is circular, but it may be polygonal, and the planting interval and the size of the figure may be different depending on the crop at any time. However, the sunlight transmission zone (2) required for agricultural products will be provided.

Using the agricultural multi-film (1) of the present invention, test cultivation of cabbage and Chinese cabbage was performed. The cabbage (5) was sown in late summer and cultivated in winter in consideration of the warm region here. After temporary planting twice for 40 days as a seedling raising period, planting is performed when the number of true leaves reaches 8 to 10, from the time of heading to the harvest in early spring for the purpose of promoting growth and preventing frost damage, and For Chinese cabbage, cultivar "Kaga" hybridized with Baotou Ren (semi-headed) is sown in spring and planted for the purpose of promoting the early summer harvest. Open a suitable hole (7) to expose cabbage and Chinese cabbage. The transparent parts (9) on both sides were covered with the bank (10) of the ridge (8) to prevent it from being blown by the wind by covering it with soil (11) from above. (See Figure 2)

[0008]

【effect】

 When cultivated as described in the examples, sunlight penetrates through the permeable zone and the soil temperature rises moderately. Growth of both vegetables is promoted, and the opaque zone shields sunlight from sunlight and suppresses the rise in soil temperature. Has an effect of keeping the soil temperature warm, and both vegetables have a solid head, but the mesophyll is thin and soft, and a sweet harvest with a relatively high water content was obtained. In addition, the sunlight is shielded in the impermeable zone, which prevents the growth of weeds and prevents the growth of insects and fungi.

[0009] The agricultural multi-film of the present invention does not cause an undesirably high temperature condition for the growth of agricultural products due to the rise of soil temperature in the summer, and a reflective film or a film obtained by vapor-depositing powder of aluminum, metal or the like on a transparent polyethylene film is used. In this way, sunlight is not reflected and the product is not irradiated excessively, and by providing an appropriate transmission zone, it has a good effect on soil and roots. Therefore, the agricultural multi-film of the present invention is effective for cultivating plateau lettuce in the flatland during the hot season and cultivating cucumber, tomato, radish, spinach and the like. Further, the black opaque zone is the simplest method of printing black ink, and does not require equipment such as the conventional multi-film production, and can be produced at a low price.

[0010]

[Brief description of drawings]

FIG. 1 is a perspective view of the agricultural multi-film of the present invention.

FIG. 2 is a sectional view of a cabbage using the agricultural multi-film of the present invention at the time of planting.

[Explanation of symbols] 1 Agricultural multi-film 2 Permeable zone 3 Impermeable zone 4 Planted part 5 Cabbage 6 Outer field solid cover 7 Hole 8 Ridge 9 Transparent part 10 Bank 11 Soil

Claims (1)

[Scope of utility model registration request] 1. A transparent polyethylene film having a wide width and a long length is opaquely printed with black ink on the upper surface of the film and is provided with portions not printed with the same circles or polygons at appropriate intervals to prevent sunlight from being exposed. A multi-film for agriculture that features a transparent zone and a transparent zone.