JPH09172879A - Mulching sheet for agriculture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject sheet having a group of protrusions arranged on a paper sheet keeping prescribed intervals in lateral and longitudinal directions, enabling the application of fertilizer and water while keeping the sheet on a ridge, effective for promoting the rooting and preventing the root-rot, enabling easy laying on a field and free from environmental pollution. SOLUTION: A number of protrusions 1 are formed on the surface (a) of a paper sheet and recess 1' are formed on the reverse face (b) by embossing, etc., keeping prescribed intervals in lateral and longitudinal directions. The obtained paper sheet has a soft texture to easily follow the form of a ridge, promotes the drainage in a heavy rainfall, improves the feeding state of fertilizer and suppresses the rise of soil temperature even in midsummer. A low-grade waste paper such as a corrugating medium can be used as the raw material for the paper sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural mulching sheet which is laid on a ridge in a field to prevent weeds from growing and protect agricultural crops such as vegetables planted in the ridge.

[0002]

2. Description of the Related Art According to Japanese Utility Model Laid-Open No. 3-74237, there is provided an agricultural mulching sheet which is made of a thermoplastic synthetic resin sheet such as polyvinyl alcohol, polyethylene, polypropylene or the like, and a corrugated wall is provided on all or part of the sheet. It is known.

[0003]

The folds of the above-mentioned known sheet are laid on the ridges during use, and as the crop grows greatly, it does not prevent the folds from growing and growing.
This is to eliminate the trouble of loosening or re-laying the seat, but since the material is a thermoplastic synthetic resin, it does not have breathability and water permeability, so water may accumulate on the seat or under the seat. The roots of crops may rot due to dampness. Furthermore, since it is not returned to the soil, it must be treated as industrial waste when it is used up, which is troublesome and costly.

[0004]

The present invention was developed in order to solve the above-mentioned problems, and the agricultural mulching sheet of claim 1 is made of paper, and one side of the agricultural mulching sheet has predetermined intervals in the vertical and horizontal directions. It is characterized by having a group of convex protrusions which are kept and protrude. The agricultural mulching sheet according to claim 2 is
It is made of paper and has a first convex group of protrusions projecting from one side thereof in a vertical and horizontal direction at a predetermined interval, and a second convex group of protrusions located at the interval of the first projecting group and projecting from the other side. It is characterized by having.

[0005]

1 and 2 show the agricultural mulching sheet according to claim 1 and FIGS. 3 and 4 show the agricultural mulching sheet according to claim 2. Both the mulching sheet according to claim 1 and claim 2 is made of paper having ventilation, water permeability, water absorption, and heat insulation. The raw material of the paper may be pulp or waste paper, but it is preferable to use the lower grade waste paper among the waste papers from the viewpoint of laying it on the ridges for disposable use, returning it to the soil, and effective use of resources. Although the thickness of the paper is arbitrary, the paper may have a basis weight of about 50 to 150 g, a thickness of about 0.15 to 0.3 mm, and a corrugated cardboard core. Depending on the type of crop, the period of laying on the ridge differs from about 1 month to about 1 year, but the amount of paper strengthening agent mixed in the raw material during paper making is adjusted to adjust for 1 month, 3 months, Several kinds such as for 6 months, 1 year, etc. are harvested, and when the use period is over, plow into the soil and return to the soil. As a product, a product having a width of about 1300 mm is wound in a roll shape for about 200 m.

The paper P constituting the sheet according to claim 1 has a large number of convex projections 1 projecting from one surface a of the paper P at predetermined intervals in the vertical and horizontal directions. Therefore, the portion of the protrusion 1 on the other surface b of the paper is a depression 1 '. Further, the paper P constituting the sheet according to claim 2 has a large number of convex first projections 1 protruding from one surface a thereof at predetermined intervals in the vertical and horizontal directions, and the first projections 1.
It has a large number of convex second projections 2 which are located at intervals of and which project from the other surface b of the paper. For this reason, the portion of the second protrusion 2 on one side a of the paper is a depression 2 ', and the portion of the protrusion 1 on the other side b of the paper is a depression 1'.

Although the projections 1 and 2 are shown to have a circular planar shape, the shape is not limited to a circular shape and may be a quadrangle or other polygonal shape. If the protrusion is circular, the diameter is 2 to 50 m.
m, height of the protrusion from the paper, or depressions 1 ', 2'
Has a depth of about 0.2 to 15 mm. These protrusions can be formed with high efficiency by embossing paper. The vertical and horizontal intervals of the protrusions are arbitrary, but are about 3 to 100 mm. Optimal dimensions are selected for the diameter of these protrusions, the depth of the depressions, and the vertical and horizontal intervals of the protrusions, depending on the crop to which they are applied.

According to the purpose, the mulching sheet according to claim 1 is laid on the ridge with the paper surface a from which the projection 1 projects (up) (FIG. 2A), or with the paper surface a from which the projection 1 projects downwards. (Fig. 2B). On the other hand, according to the mulching sheet of claim 2, no matter whether the mulching sheet is laid on the ridge with the surface a of the paper facing up or on the ridge with the surface b of the paper facing up, the projection of either the first or the second is above the paper surface. Since the depression of either the second projection or the first projection faces upward, it may be laid on the ridge with either surface a or b facing up (FIG. 4).

When the mulching sheet is laid on the ridges in this way, holes are punched in the sheet at optimum intervals according to the crops or notches such as crosses are formed, and the seeds of the crops are embedded in the ridges through the holes or the notches. Or plant the roots of crop seedlings in the ridges.

[0010]

EFFECTS OF THE INVENTION Since the mulching sheet according to any one of claims 1 and 2 is paper, it has appropriate ventilation, water permeability, water absorption,
And has a heat insulating property. Therefore, when it is laid on a ridge, it can be fertilized and sprinkled as far as it is laid by its aeration, water permeability and water absorption, and can absorb the fertilizer component and water and supply it to agricultural products. Moreover, the heat insulation property suppresses the temperature rise of the land even in the midsummer, and the roots of agricultural crops can be exhibited well. In addition, its breathability releases the underlying moisture to the atmosphere, preventing root rot.

Further, when the agricultural products are used for harvesting or the like, the soil is returned to the soil by plowing them into the soil, so that the treatment after use can be easily performed.

Since the surface area is increased by the protrusions formed by embossing, ventilation and water permeability are further enhanced, and the hardness of the paper in the lengthwise direction or the widthwise direction due to the arrangement of the fibers of the paper is eliminated, and the omnidirectional Be flexible to. Therefore, the shape of the ridge is easily adapted, and the work of laying on the ridge is facilitated.

According to the mulching sheet of claim 1, when the surface a of the paper on which the projection 1 projects is placed on the ridge, the mulching sheet is
Since it rains through the gap between the protrusions 1 and is discharged between the ridges,
Rain does not collect on the sheet. Even in this case, the paper can absorb and retain some rain and supply it to the ridges.

When the mulching sheet of claim 1 is laid on a ridge with the surface a of the projection 1 protruding from the bottom, the fertilizer and water are collected in the depression 1'of the projection 1 formed on the paper surface B. , It can be gradually fed to the ridges. In particular, when solid fertilizer is stored in the depression 1 ', the fertilizer in the depression 1'is gradually melted and supplied to the ridge each time water is sprayed.

As described above, the mulching sheet according to the second aspect has the same direction even if it is laid on the ridge with either the surface a or the paper b facing down, and there is no directivity. Most of the water is drained between the ridges while collecting a small amount of water in the dented area. Of course, even in this case, the paper will rain to some extent,
Absorb water, hold it, and supply it to the ridge. Also, a small amount of rain accumulated in the depression is gradually supplied to the ridge. And store the fertilizer in the depression,
Can be gradually fed to the ridge.

[Brief description of the drawings]

FIG. 1A is a plan view of an example of a mulching sheet according to claim 1, and FIG. 1B is a sectional view taken along line XX.

2 (A) and 2 (B) are explanatory views of a usage state of the mulching sheet according to claim 1. FIG.

FIG. 3A is a plan view of an example of a mulching sheet according to claim 2, and FIG. 3B is a sectional view taken along line XX.

FIG. 4 is an explanatory diagram of a usage state of the mulching sheet according to claim 2;

[Explanation of symbols]

 P Paper a One side of paper b Other side of paper 1 Protrusion 1 ′ Dimple due to protrusion 1 2 Second protrusion 2 ′ Dimple due to second protrusion 2

Claims (2)

[Claims] 1. An agricultural mulching sheet comprising paper and having a group of convex projections protruding from one surface thereof in a vertical and horizontal direction at predetermined intervals. 2. A sheet of paper, having a first projection group of protrusions projecting from one side thereof in a vertical and horizontal direction at a predetermined interval, and
An agricultural mulching sheet, characterized in that it has a convex second projection group that is located at an interval of the first projection group and projects from the other one surface.