JPH0134570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to construction work in which a vegetation base is formed in areas where fertilizer nutrients cannot be supplied from the field soil.
This relates to a method of sustaining the effect of fertilizer in order to grow plants over a long period of time.

Recently, even on bedrock slopes that were previously considered impossible to green, greening has become common in order to improve the landscape. A method of forming a thick layer of vegetation base by stretching wire mesh lath and spraying it on top has been proposed and used in many cases.

Among these, the method of pasting sandbags with vegetation was proposed by the applicant in Utility Model Publication No. 46-8105, and this sandbag with vegetation has been used in large quantities, and the applicant has Various construction methods are also used to form a vegetation base in layers. The problem with these two construction methods is that 2 to 3 years after construction, the fertilizer runs out and the plants decline. The reason for this is that since the target slope is a slope without soil such as bedrock, there is no supply of fertilizer nutrients from the soil to the vegetation base. This is because they are growing.

For this reason, slow-release fertilizers are also used, but slow-release fertilizers are only effective for two to three years at most, and after all, top-dressing must be done once every four to five years. It was uneconomical.

The applicant focused on this problem of fertilizer depletion, and as a result of intensive research into ways to maintain fertilizer effectiveness over the long term, the applicant discovered a three-stage method to elute fertilizer nutrients extremely slowly. The configuration will be explained below.

The first stage of the three-stage process is to select a fertilizer, such as a slow-release fertilizer such as a solid fertilizer or an eye-batch fertilizer, or a slow-release fertilizer such as a coated fertilizer.

In the second stage, the bag to be filled is filled with a thickness of 0.1 to 3 mm.
It is constructed from a nonwoven fabric having an air permeability within the range of 10 to 300 c.c./cm/sec.

The third step is to impregnate the eluted fertilizer nutrients into an inorganic water-retaining material such as vermiculite or perlite, or into an organic water-retaining material such as bark compost or peat moss.

The above findings indicate that when fast-acting fertilizer is placed in a bag made of non-woven fabric within the range specified above, the fertilizer that is eluted by moisture and becomes liquid fertilizer is
Because the nonwoven fabric is thick and has extremely poor ventilation, it only gradually leaks out of the bag, and inorganic and organic water retaining materials are always impregnated with the eluted fertilizer. This is based on the fact that if these water retention materials are impregnated with fertilizer, the fertilizer will dissolve at an extremely slow rate.

To explain the fertilizer bag of the present invention constructed based on the above knowledge, a bag body of a size according to the intended use is made from non-woven fabric within the range limited above, and a slow-release fertilizer and a slow-release fertilizer are placed inside the bag body. It is completed by filling it with a mixture of one or more, preferably two, types of natural fertilizers, an inorganic or organic water retaining material, and sometimes clay minerals that have a strong ability to adsorb fertilizers.

If the fertilizer bag made in this way is to be used as a vegetated sandbag in a cast-in-place lattice frame made of concrete, etc., it can be made into a cylindrical fertilizer bag and attached to the inner or outer surface of the vegetated sandbag, or Put it in sandbags.

Another method is to provide a storage part such as a pocket on the inner or outer surface of the sandbag with vegetation and store the fertilizer bag therein.

Next, in the case of the method of forming a thick vegetation base by spraying, a cylindrical fertilizer bag is pasted above or below the wire mesh lath to be stretched before spraying, and vegetation is spread over it. The method is to spray the base material.

When applied as described above, the fertilizer inside the bag will gradually begin to dissolve over a period of 6 months to 2 years due to the small amount of water supplied through the thick non-woven fabric or the non-woven fabric with poor ventilation. is once an inorganic system,
Fertilizer is impregnated into an organic water-retaining material, and once impregnated with this water-retaining material, the fertilizer gradually flows out again through the thick non-woven fabric or poor ventilation, so conventional slow-release fertilizers cannot be used. It maintains more than twice the fertilizing effect compared to other fertilizers.

Therefore, conventional methods have been used, such as pasting sandbags with vegetation inside a lattice frame formed by pouring concrete or other materials on bedrock, or spraying a thick layer of vegetation base over a wire mesh lath. However, in the present invention, top-dressing had to be done once every four to five years, as plants begin to decline due to lack of fertilizer two to three years after construction. Since bags are used, the fertilizing effect lasts for 6 to 7 years, so top dressing only needs to be carried out once every 8 to 9 years, which has excellent economic effects.

Claims (1)

[Claims] 1 Thickness 0.1~0.3mm, ventilation rate 10~300c.c./cm/sec
A method of sustaining the fertilizer effect over a long period of time by adding one or more slow-release fertilizers and slow-release fertilizers mixed with an inorganic or organic water retaining material into a bag made of non-woven fabric.