JP2000064294A - Slope greening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time until a greening work on a slope is completed through a series of processes. SOLUTION: A kneaded stuff S which is formed by stirring a post-planting earth, a fertilizer rich in nitrogen, seeds of Western lawn, glue and water is sprayed on a slope 4. A vegetation base material 3 which is formed by straws 2 knit by a string 1 in a reed-screen manner is formed. The slope 4 is covered with the vegetation base material 3. The vegetation base material 3 is covered with a lath net 6. The vegetation base material 3 and the lath net 6 are fixed to the slope 4 using anchor pins 8. The kneaded stuff S is again sprayed on the vegetation base material 3 without any post-planting period.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope for vegetating a cover plant such as turf, clover, wormwood and the like on a slope containing a large amount of rock or rock. It relates to the greening method. 2. Description of the Related Art In recent years, as an alternative technique to spraying mortar on a slope or construction using a fall prevention net, there has been proposed a construction method for greening and stabilizing a slope by planting plants. The present inventor has already made Japanese Patent Publication No. 60-3
Japanese Patent No. 5490 discloses this kind of greening method. The greening method mainly includes the following steps (a) to (d). [0003] Step (a): arranging a vegetation base material in which straw is interwoven with strings and a fall prevention net made of a corrosion-resistant material, and fixing them to the sloping surface with anchor pins; Step (b): spraying a kneaded material formed by stirring a curing soil, a fertilizer rich in nitrogen, glue and water on a vegetation base material (first spraying step), Step (c): 20 to 30 days Providing a curing period of about a day to corrode and compost the straw. Step (d): spraying a kneaded material made by stirring the curing soil, seeds and water onto the vegetation base material (second spraying step) ). [0004] Then, the seeds sprayed through the above steps germinate soon, and after several months, the slope is completely covered by the cover plant. In addition, trees and the like may be further planted on the greened slope. However, according to the conventional greening method, it is necessary to provide a curing period of 20 to 30 days between the first spraying step and the second spraying step. Was. This is because the kneaded material used in the primary spraying step contains a fertilizer containing a large amount of nitrogen, and it has been conventionally considered that a nitrogen-rich environment reduces the germination rate of seeds. Further, it is a common theory that seeds are damaged by an increase in soil temperature due to corrosion and composting of the forcing substrate. [0006] Therefore, in the conventional greening method for avoiding such a problem, there is a problem that it takes a considerable number of days to complete the greening work on the slope through the above-described series of steps. Conventionally, a fall prevention net made of a corrosion-resistant material such as vinyl-iron or nylon has been used. For this reason, when a tree planted on a slope grows and its trunk grows, there is also a problem that the root portion is tightened by a fall prevention net and growth of the tree is hindered. Based on the above circumstances, the present inventor has conducted various investigations and
Tests and the like revealed that the nitrogen content in the fertilizer contained in the kneaded material evaporates in a relatively short period of time, unlike the phosphoric acid content and the potassium content. For this reason, it was expected that the germination rate would not be as low as initially feared. It has also been clarified that the temperature rise when the vegetation base material is composted is not so high as to cause decisive damage to seed germination and growth. Based on these findings, the present inventor has hypothesized that corrosion and composting of vegetation bases and germination and growth of seeds can be performed almost simultaneously, and based on this hypothesis, Completed the invention. It is an object of the present invention to provide a slope greening method capable of reliably reducing the time required for completing the greening operation. According to the present invention, the slope is covered with a vegetation base material in which straw is knitted with cords, and the vegetation base material is covered with a fall prevention net. In the greening method of vegetating a cover plant on the slope by fixing the base material and the fall prevention net to the slope with an anchor pin, and further spraying a kneaded material including the curing soil and seeds on the vegetation base material, On the slope, first, after spraying the kneaded material made by stirring the cured soil, fertilizer rich in nitrogen, seeds, glue and water, the vegetation base material and the drop prevention net are fixed to the slope, and then The kneaded material is sprayed again from above the vegetation base without providing a curing period. Therefore, according to the revegetation method of the present invention, even if the environment is multi-nitrogen at the beginning of spraying, nitrogen is vaporized within a relatively short period of time and does not harm the seeds. Concentration. Therefore, the corrosive and composting of the vegetation base material and the germination and growth of the seeds can proceed almost simultaneously. Therefore, the conventional 20 days to 3 days
A zero-day curing period is not required, and as a result, the time required for completing the greening operation is reliably reduced. An embodiment of the present invention will now be described in detail with reference to FIGS. In the greening method of the slope 4 of the present embodiment, the curing soil 600 kg / 100
m ^2, N, P, and K in compound fertilizers 150 kg / 100 m ² in a proportion of 15-9-9, Western lawn (cv, Kentucky 31F) seeds 2 kg / 100 m ² of adhesive as glue 0.2kg / 100m ² and water 0.2m ^3/10
0 m ² is blended. In addition to these, water retention agent 2kg / 10
A kneaded material S for spraying is prepared by adding 0 m ² and stirring. The reason why the curable soil is blended into the kneaded material S is that the curable soil is excellent in water retention and the like and can maintain an environment favorable for seed germination. Also, the cured soil activates soil microorganisms that promote composting of straw. The reason for increasing the nitrogen content in the chemical fertilizer is to promote the production of compost by quickly corroding straw. The grounds for using chemical fertilizers are based on the fact that nitrogen in chemical fertilizers is vaporized in a relatively short period of time. The reason why the pressure-sensitive adhesive is compounded is that even if the slope 4 is exposed to rain or the like after spraying the kneaded material S, the amount of the kneaded material S flowing out of the slope 4 can be minimized. It is. The reason why the water retention agent is added to the kneaded material S is to always maintain the water environment of the slope 4 within a suitable range, thereby improving the germination rate and achieving early vegetation. The reason for adding the woody cellulose is to adhere the seeds to the woody cellulose and prevent the seeds from flowing out due to rain and wind. Next, as a first spraying step, the kneaded material S is sprayed on the slope 4 using a pump. At this time, the pressure of the pump and about ^{2kg / cm 2 ~4kg / cm 2} ,
Preferably, the spray amount per 100 m ² is 20 kg. Considering the optimum temperature conditions, it is preferable that the spraying step is performed from late March to early November. Further, it is preferable that the spraying step in a cold region be performed by mid-April to mid-October. The reason is that the composting of the straw and the germination of the seeds are performed at an optimum temperature. Next, the step of coating the slope 4 after the primary spraying step will be described. As shown in FIGS. 1 and 2, in this step, first, it is necessary to form a vegetation base material 3 by knitting rice straw 2 one by one with a string 1 such as a nylon rope in a left and right direction at two places. There is. In addition, the vegetation base material 3 of this embodiment is knitted so that the weight per 1 m ² is 1.5 kg to 2.0 kg. Next, a plurality of anchor pins 5 (about 1 m in length) are driven into the upper shoulder 4 a of the slope 4 of the bedrock, and the vegetation base material 3 is hooked on the anchor pins 5. And the vegetation base material 3
Is coated on the entire slope 4 in a hanging state. Next, an iron rhombus wire lath 6 as a fall prevention net is put on the surface of the vegetation base material 3. Further, the same reinforcing cord (thickness: 13 mm) 7 as that of the cord 1 is laid on the surface of the rhombus wire lath 6 in a square shape of 1 m to 2 m. Then, the strings 1 and 7 and the rhombic wire lath 6 are simultaneously fixed to the slope 4 using the anchor pins 8. In the present embodiment, the used amount of the anchor pins 8 is four per 1 m ² . In this embodiment, the rhombus wire lath 6
The thickness of the line is 14 mesh, and the roughness of the mesh is 50 mm. Since this rhombus wirelass 6 is not covered with vinyl or the like, it rusts and becomes thinner by about 0.1 mm in one year, and is eventually partially cut. Thereafter, the kneaded material S having the same composition as the kneaded material S used in the first spraying step is sprayed on the vegetation base material 3 on the slope 4 by a pump (secondary spraying step). Further, the secondary spraying step is performed without providing a curing period after the primary spraying step and the step of coating the slope 4. At this time, the kneaded material S sprayed on the slope 4 enters into the slits of the rice straw 2 one by one and is fixed. In addition, the rice straw 2 constituting the vegetation base material 3 contains the kneaded material S
It absorbs moisture and becomes supple. The setting of the pump pressure and the amount of spraying is almost the same as in the first spraying step. When the greening operation as in the above embodiment is performed, first, the rice straw 2 is corroded by the action of soil microorganisms.
Composting starts and the temperature near the surface of the slope 4 starts to rise. In addition, seed germination progresses almost simultaneously with corroding and composting of the rice straw 2. The term “substantially the same” as used herein means that the difference between the start times of corrosion, composting, and seed germination is within several days at most, and is not a difference of several tens of days. In this case, as the corrosion and composting of the rice straw 2 progress, the nitrogen content in the kneaded material S is consumed by the soil microorganisms and gradually decreases. Further, the nitrogen content has a property that it is more easily vaporized than the potassium content and the phosphoric acid content. For these reasons, the environment near slope 4 which was initially polynitrogen changed to an environment containing nitrogen to the extent that it does not harm germination and growth of seeds within a relatively short period after completion of the greening operation. I do. Furthermore, in addition to the above-mentioned reason, even if the temperature rises when the rice straw 2 is corroded or composted, it does not reach such a high temperature that the germination or growth of the seeds is decisively damaged. There are facts. Therefore, the rice straw 2 can be made corroded and composted, and the seeds can be germinated and germinated without providing a long curing period as in the prior art.
It is possible to proceed with the raising at the same time and without any inconvenience. As a result, the time required for completing the greening operation is more reliably reduced than before. The specific effects of the above embodiment are as follows. That is, according to the greening method of the present embodiment, since the kneaded material S is sprayed before coating the vegetation base material 3 and the like, the outflow of the kneaded material S due to rain or the like is relatively small. . Also,
There is also an advantage that it is not necessary to set the pump pressure too high during the spraying step. Further, in the tree planting method according to the present embodiment, a rhombus wire lath 6 that is partially cut after several years from the tree planting work is used as a fall prevention net. Benefits arise. In other words, when a young tree is planted on the green sloped slope 4, even if the young tree grows several years later and the root part is enlarged, the growth of the tree is inhibited by the tightening by the rhombus wire lath 6. It is not done. When such a rhombus wirelass 6 is used, trace elements such as the melted-out iron can be used as a cover plant or a fertilizer for young trees. The present invention is not limited to the above embodiment, but can be modified as follows. For example, (a) the vegetation base material 3 does not necessarily need to be manufactured by the same method as the present embodiment. For example, it is also possible to use a natural straw material or the like which has been knitted in a mat shape in advance. (B) The seed to be mixed with the kneaded material S is not limited to the western turf as in the present embodiment. For example, any seed can be used as long as it is a cover plant that can easily cover the slope 4, such as white clover, a mattress, a trail, a wormwood, and the like. In this case, it is of course possible to use a mixture of two or more seeds. (C) As the fall prevention net, a net different from the rhombus wirelass used in the present embodiment can be used. For example, it may be a wire mesh made of an iron wire covered with vinyl, and a part of the vinyl may be peeled off. Further, a net using a biodegradable material or a photodegradable material may be used. In other words, it is sufficient that the wire mesh or the net is partially cut after functioning as a fall prevention net for a certain period of time. (D) N, P and K of the compound fertilizer are not necessarily 1
It does not need to be 5-9-9. For example, N, P, K
However, it is of course possible to use advanced chemical fertilizers such as 15-15-15. As described in detail above, according to the slope greening method of the present invention, a curing period of 20 days to 30 days as in the prior art is not required, so that a series of steps are required. An excellent effect is obtained in that the time until the greening operation of the slope is completed can be reliably reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state where a vegetation base material 3 of the present invention is covered on a slope 4. FIG. 2 is an enlarged vertical sectional view showing a state where a kneaded material S is sprayed. [Description of Signs] 1 string, 2 (rice) straw, 3 vegetation base, 4 slope, 6
Rhombus wirelass as fall prevention net, 8 anchor pins, S kneaded material.

Claims (1)

Claims: 1. A slope (4) is covered with a vegetation base material (3) in which straw (2) is interwoven with a string (1).
The vegetation base material (3) is covered with a fall prevention net (6), and the vegetation base material (3) and the fall prevention net (6) are fixed to a slope (4) with an anchor pin (8). In a greening method in which a cover plant is vegetated on a slope (4) by spraying a kneaded material including a cured soil and seeds onto the vegetation base material (3), the cured soil is first applied to the slope (4). , Nitrogen-rich fertilizers,
After spraying the kneaded material (S) made by stirring seeds, glue and water, the vegetation base material (3) and the fall prevention net (6)
Is fixed to the slope (4), and then the same kneaded material (S) is sprayed again from above the vegetation base material (3) without providing a curing period.