JP2019092491A - Greening method and soil for greening - Google Patents

Abstract

To provide a greening method which is safe for environment, and which facilitates fertilization management, and soil for greening applied for the greening method.SOLUTION: The invention is configured so that a plant is planted on soil S1 for greening provided on an artificial ground G, and greening on the artificial ground G is performed, at the time, the soil S1 for greening is formed by mixing at a prescribed ratio, clay and gravel, a seedling of a plant is cultivated in advance, on the soil for greening which is filled in a seedling box, then the acquired seedling is implanted on the soil S1 for greening on the artificial ground G. On the artificial ground G, the soil for greening in which a ratio of the clay is 21 mass% or greater and 38 mass% or less is used, and in the seedling box, the soil for greening in which a ratio of the clay is 30 mass% or greater and 38 mass% or less is used.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for replanting artificial ground mainly provided on a building, such as a roof or a veranda, and a revegetation soil used in the replanting method.

  In cities, greening of artificial ground provided on buildings, such as rooftops or verandas, is promoted for the purpose of reducing the heat island phenomenon or visual improvement. In order to green an artificial ground provided on a building, after applying waterproofing on the artificial ground, construct a drainage layer using perlite or a drainage plate, etc. , Planting plants. At that time, if the density of the soil used for the customer soil is excessive, it is necessary to change the design of the building so that the structural strength of the building can withstand the total mass of the soil being guest soil. Because of the high cost, I had to give up on greening.

  On the other hand, mineral-based artificial lightweight soil composed mainly of pearlite-based or obsidian-based pearlite, organic mixed-engineered lightweight soil composed of obsidian-based pearlite or calcinated rock mixed with organic materials, and bark of softwood are mainly used. Artificial soils such as organic artificial soils have been developed. However, since these artificial soils have been developed for the purpose of weight reduction and improvement of water retention, their properties are very different from natural soils, causing poor growth of planted trees and yellowing of leaves, and A few years after planting, the planted plants were dead.

Therefore, the following soil for greening is proposed by patent document 1 mentioned later.
That is, for soil for revegetation, add 10% to 30% by volume of porous volcanic moss and 3 to 10% by volume of charcoal to the soil generated by water purification plant, and add bark compost, peat moss, perlite and It is configured by adding phosphate fertilizer. Here, the water purification plant generation soil is a water purification plant that collects turbidity such as sediments from the river removed in the process of making tap water from the raw water intake, and collects sediments such as chemicals used for water purification treatment Dewatered. The amount of water generated by the water purification plant in the soil for greening described above is 30 to 80% by volume, preferably 40 to 60% by volume.

JP 2000-87342 A

  However, in the conventional greening method using such water purification plant generated soil, since a coagulant containing polyaluminum chloride or aluminum sulfate as a main component is added in the process of water purification treatment, the obtained water purification plant The generated soil has a high content of aluminum, which may result in a phosphate deficient soil. In order to avoid this, addition of phosphate fertilizer is essential to the above-mentioned soil for revegetation, but the phosphate component included in the phosphate fertilizer has the property of eluting in rain water. By the way, in greening on artificial ground, as described above, it is required to reduce the total mass of the greening soil to be added to the artificial ground as much as possible. Need to be as small as possible. On the other hand, in order to maintain the roots of planted trees in a healthy environment, soil for revegetation is also required to have good permeability. When the soil for planting of the composition described above is applied to an environment of high water permeability, which is a shallow customer soil in this way, the phosphate component included in the phosphate fertilizer is easily washed away from the soil for planting together with rainwater. The problem is that phosphorus, which is a nutrient source, tends to run short for If the addition of phosphate fertilizer to the soil for planting is increased to avoid this, there is a possibility that phosphorus will be excessive and the growth of the planted trees will be seriously affected.

  On the other hand, there is a possibility that harmful substances such as heavy metals may be mixed in the soil generated by the water purification plant, and if the mixed harmful substances are discharged together with the soil generated by the water purification plant, the environment has a serious adverse effect on the environment.

  The present invention has been made in view of such circumstances, and provides a greening method that is safe for the environment and easy to manage fertilization, and a greening soil to be applied to the greening method.

  (1) A method of revegetation according to the present invention is a method of planting a plant on a revegetation soil laid on an artificial ground and affixing the revegetation soil at a predetermined ratio in a method of revegetation on the artificial soil. When the seedlings of the plant are grown in advance in the soil for revegetation in the nursery soil filled with mulberry and clay, and the resulting seedlings are planted on the soil for revegetation on the artificial ground, On the artificial ground, a soil for revegetation with a proportion of clay of 21% by mass to 38% by mass is used, and for the nursery box, a soil for afforestation with a proportion of clay of 30% by mass to 38% by mass is used It is characterized by

  In the revegetation method of the present invention, when planting a plant on the revegetation soil laid on the artificial ground and replanting the above artificial soil, the revegetation soil is mixed with a weir at a predetermined ratio. Composed with clay. The components of the cocoon do not elute from the cocoon, and the clay is a natural product and therefore safe for the environment. On the other hand, while clay is excellent in the ability to retain fertilizer, it does not have adsorption of specific nutrients such as adsorption of phosphorus by aluminum, so that fertilization management is easy.

  Here, the plants to be planted in the soil for planting on the artificial ground are prepared by cultivating the seedlings of the plants in advance in the planting soil filled in the nursery box, and the obtained plants for soiling on the artificial soil Plant on At that time, on the artificial ground, the soil for planting is used in which the ratio of clay to be mixed with the glaze is 21% by mass to 38% by mass, while the ratio of clay is 30% to 38% by mass in the nursery box Use greening soil for

  If the proportion of clay to be mixed with firewood is less than 21% by mass, the water permeability of the soil for greening is high but the water holding capacity is weak, and in addition to the need to increase the amount of irrigation, the ability to retain fertilizer is also insufficient. As a result, when the cultivation period was about 3 years, obvious plant growth defects were observed in the planted plants. On the other hand, if the proportion of clay mixed with the glaze exceeds 38% by mass, the water retention capacity of the revegetation soil becomes excessive, so there is a possibility that high temperature failure may occur at the end of the rainy season. On the other hand, when the ratio of clay to be mixed with mulberry is 21 mass% or more and 38 mass% or less, the water retention capacity and permeability of the greening soil are well-balanced, and the required fertility is also maintained. And planted plants can be cultivated for a long time without causing high temperature damage.

  By the way, when growing seedlings in a nursery box, the nursery box itself is excellent in water permeability, and the nursery box can be freely moved, so that temperature management and moisture management can be freely implemented. . On the other hand, although clay is inferior in water permeability, it has high fertility and water holding capacity, so the higher the ratio of mixing clay, the better the growth of plants. Therefore, the afforestation soil to be filled in the nursery box is 30% by mass or more and 38% by mass or less, which is more than the ratio of the clay constituting the afforestation soil used on the artificial ground. By this, the growth of a seedling becomes favorable and a strong seedling can be obtained.

  On the other hand, even in the case of the revegetation soil used in the nursery box, if the proportion of the clay mixed with the moss is 40% by mass or more, the water in the revegetation soil becomes excessive, causing problems in the growth of the seedlings. Because there is a risk, use a revegetation soil with a proportion of clay of 38% by mass or less.

  (2) The greening method according to the present invention is characterized in that a soil for greening having a ratio of clay of 25% by mass to 36% by mass is used on the artificial ground.

  In the revegetation method of the present invention, a revegetation soil having a ratio of 25% by mass to 36% by mass of clay to be mixed with the clay is used on the artificial ground. When the ratio of the clay mixed with the glaze is 25% by mass or more, the water holding capacity and the fertilizing ability of the greening soil are improved, so that the plants can be grown well. Moreover, when the ratio of the clay mixed with the glaze is 36 mass% or less, the water permeability of the said soil for greening can be maintained high, and the root of the planted plant can be kept healthy.

  (3) The greening method according to the present invention is characterized in that the greening soil having a ratio of clay of 28% by mass to 33% by mass is used on the artificial ground.

  In the revegetation method of the present invention, a revegetation soil having a ratio of clay of 28% by mass to 33% by mass or less is used on the artificial ground. When the proportion of clay mixed with mulberry is 28 mass% or more and 33 mass% or less, the balance between the water holding capacity and the water permeability of the revegetation soil is good, and plants can be grown well over many years . In addition, it is possible not only to avoid high temperature damage at the end of the rainy season but also to protect the planted plants without freezing in the revegetation soil even in winter.

  (4) In the revegetation method according to the present invention, the soil for revegetation with a proportion of clay of approximately 30% by mass is used on the artificial ground, and the proportion of clay is approximately 32% by mass in the nursery box. It is characterized by using soil.

  In the revegetation method of the present invention, the soil for afforestation having a ratio of about 30% by mass of clay to be mixed with the straw is used on the artificial ground, and the ratio of the clay to be mixed with the pod is about Use 32% by mass of revegetation soil. As a result of intensive investigations conducted by the present inventors, the planted plants were able to be cultivated most favorably when using a soil for revegetation laid on artificial ground with a ratio of clay of approximately 30% by mass. In addition to the balance between the water holding capacity and the water permeability of the revegetation soil, this is a balance between the water retention ability and the growth of the planted plants on the artificial ground, not too early, It is thought that it is just because it is performed in a very well-balanced manner.

  On the other hand, in the case of the revegetation soil filled in the nursery box, as mentioned above, the nursery box itself is excellent in water permeability, so compared to the permeability of the revegetation soil laid on the artificial ground. Seedlings are made larger by increasing the fertility of the soil by using the revegetation soil in which the water permeability of the revegetation soil filled in the nursery box is high and the proportion of the clay to be mixed with the straw is about 32% by mass. It can be grown fast. On the other hand, when the proportion of clay in the revegetation soil filled in the nursery box is approximately 32% by mass, the required permeability can be obtained without performing special management to increase the permeability of the nursery box. Management of seedlings is easy.

  (5) The greening method according to the present invention is characterized in that a porous natural stone or artificial stone having a plurality of interconnected cells is used as the weir.

  In the greening method of the present invention, a porous natural stone having a plurality of interconnected cells, such as pearlite formed by firing bora soil, pearlite, and pinestone as a weir that constitutes the soil for greening Or use artificial stone. The revegetation soil in which the cocoon and the clay are mixed has a structure in which the clay having little water permeability intervenes between the cocoon and the cocoon that constitutes the revegetation soil. In such a state, when a porous natural stone or artificial stone having a plurality of communicating cells is used as a weir, water can permeate through the weir, whereby the water permeability of the greening soil is secured. .

  (6) The greening method according to the present invention is characterized in that the depth of the greening soil laid on the artificial ground and the depth of the greening soil to be filled in the nursery box are substantially the same.

  In the revegetation method of the present invention, the depth of the revegetation soil to be laid on the artificial ground and the depth of the revegetation soil to be filled in the nursery box are substantially the same, and sufficient growth occurs in the revegetation soil in the nursery box. The seedlings obtained by the treatment are planted in the same depth of afforestation soil laid on artificial ground. The mass that can be applied to the roof of a building without special design changes is determined by the Building Standard Law, and in order to satisfy such a standard, soil for planting soil to be laid on artificial ground such as the roof is to be satisfied. It is required to reduce the depth as much as possible. On the other hand, in the case of seedlings grown in a relatively deep soil, the roots extend deep, and therefore the roots of the seedlings are to be planted in the revegetation soil on an artificial ground whose depth is made as small as possible. It must be processed to a depth corresponding to the depth of the revegetation soil on the artificial ground, and as a result, the vitality of the seedlings is reduced. On the other hand, in the case of seedlings grown in the revegetation soil having a depth substantially the same as the depth of the revegetation soil laid on the artificial ground, when planting in the revegetation soil on the artificial ground, the root It is possible to maintain the vitality of the seedlings, with almost no cutting.

  (7) The greening soil according to the present invention is laid on the artificial ground in order to green the artificial ground, and is mixed at a predetermined ratio in the greening soil in which a plant is planted there And clay, and the ratio of the clay is 21% by mass to 38% by mass.

  In the greening soil according to the present invention, the greening soil is placed on the artificial ground in order to green the artificial ground, and in the greening soil in which the plants are planted there is a mixture of moss mixed at a predetermined ratio The composition contains clay and the proportion of the clay is 21% by mass to 38% by mass. The components of the cocoon do not elute from the cocoon, and the clay is a natural product and therefore safe for the environment. On the other hand, while clay is excellent in the ability to retain fertilizer, it does not have adsorption of specific nutrients such as adsorption of phosphorus by aluminum, so that fertilization management is easy.

  If the proportion of clay mixed into the revegetation soil is less than 21% by mass, the water remediation capacity of the revegetation soil is high but the water retention capacity is weak, and in addition to the need to increase the amount of watering, the fertilization ability is not good either. Since it is sufficient, when the cultivation period passed about 3 years, apparent poor growth was observed in the planted plants. On the other hand, if the proportion of clay mixed with the glaze exceeds 38% by mass, the water retention capacity of the revegetation soil becomes excessive, so there is a possibility that high temperature failure may occur at the end of the rainy season. On the other hand, when the ratio of clay to be mixed with mulberry is 21 mass% or more and 38 mass% or less, the water retention capacity and permeability of the greening soil are well-balanced, and the required fertility is also maintained. And planted plants can be cultivated for a long time without causing high temperature damage.

  (8) In the revegetation soil according to the present invention, the seedlings of the plant are cultivated in advance in the revegetation soil filled in the nursery box, and the obtained seedlings are planted in the revegetation soil on the artificial ground In the above case, the soil for revegetation, which is filled in the nursery box, is also characterized in that it comprises mulberry and clay mixed at a predetermined ratio, and the ratio of the clay is 30% by mass to 38% by mass. I assume.

  In the soil for revegetation of the present invention, the seedlings of the plant are grown in advance in the soil for revegetation filled in the nursery box, and the resulting seedlings are planted on the soil for revegetation on the artificial ground. The greening soil to be filled in the nursery box also comprises mulberry and clay mixed at a predetermined ratio, and the ratio of the clay is 30% by mass to 38% by mass.

  When the seedlings are grown in the nursery box, the nursery box itself is excellent in water permeability, and the nursery box can be freely moved. Therefore, temperature management and water management can be freely implemented. On the other hand, although clay is inferior in water permeability, it has high fertility and water holding capacity, so the higher the ratio of mixing clay, the better the growth of plants. Therefore, the afforestation soil to be filled in the nursery box is 30% by mass or more and 38% by mass or less, which is larger than the ratio of the clay constituting the afforestation soil used on the artificial ground. By this, the growth of a seedling becomes favorable and a strong seedling can be obtained.

  On the other hand, even in the case of the revegetation soil used in the nursery box, if the proportion of the clay mixed with the moss is 40% by mass or more, the water in the revegetation soil becomes excessive, causing problems in the growth of the seedlings. Because of the fear, the proportion of clay should be 38% by mass or less.

  (9) In the tree for greening according to the present invention, the proportion of clay contained in the soil for greening laid on the artificial ground is approximately 30% by mass, and is included in the soil for greening filled in the nursery box It is characterized in that the proportion of clay is about 32% by mass.

  In the greening soil of the present invention, the proportion of clay contained in the greening soil laid on the artificial ground is approximately 30% by mass, and the proportion of clay contained in the greening soil filled in the nursery box Is approximately 32% by mass. As a result of intensive investigations conducted by the present inventor, it is best to cultivate the planted plants when using a soil for revegetation laid on artificial ground with a ratio of clay to be mixed in the pot being approximately 30% by mass. It was possible. In addition to the balance between the water holding capacity and the water permeability of the revegetation soil, this is a balance between the water retention ability and the growth of the planted plants on the artificial ground, not too early, It is thought that it is just because it is performed in a very well-balanced manner.

  On the other hand, in the case of the revegetation soil filled in the nursery box, as mentioned above, the nursery box itself is excellent in water permeability, so compared to the permeability of the revegetation soil laid on the artificial ground. Seedlings are made larger by increasing the fertility of the soil by using the soil for planting where the water permeability of the soil for planting filled in the nursery box is high and the proportion of the clay to be mixed in the pod is approximately 32% by mass. It can be grown fast. On the other hand, when the proportion of clay in the revegetation soil filled in the nursery box is approximately 32% by mass, the required permeability can be obtained without performing special management to increase the permeability of the nursery box. Management of seedlings is easy.

  (10) The soil for greening according to the present invention is characterized in that the weir is a porous natural stone or artificial stone having a plurality of interconnected cells.

  In the revegetation soil of the present invention, the weir that constitutes the revegetation soil is a porous material having a plurality of open cells, such as perlite made by firing bora soil, pearlite, and pinestone, etc. Natural stone or artificial stone. The revegetation soil in which the cocoon and the clay are mixed has a structure in which the clay having little water permeability intervenes between the cocoon and the cocoon that constitutes the revegetation soil. In such a state, when it is formed as a porous natural stone or artificial stone having a plurality of communicating cells as a weir, water can permeate through the weir, whereby the water permeability of the greening soil is secured. Be done.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows an example of the artificial ground greening system which applies the greening method which concerns on this invention. It is a perspective view which shows the raising seedling box for cultivating the seedling of the plant used for planting. It is sectional drawing which shows the nursery box for cultivating the seedling of the plant used for planting.

The greening method according to the present invention and the greening soil applied thereto will be described in detail based on the drawings.
In addition, it is needless to say that the greening method and soil for greening which are demonstrated by this Embodiment are an example which illustrates the meaning of the present invention, and the present invention includes a modification and remodeling in the range which does not deviate from the meaning. .

  FIG. 1: is sectional drawing which shows an example of the artificial ground greening system which applies the greening method which concerns on this invention, and 1 is a waterproof layer provided on the artificial ground G in the figure. The waterproof layer 1 is formed by, for example, expanding a resin sheet having water impermeable property such as a rubber material on the artificial ground G, and when using a resin sheet, substantially the entire back surface of the resin sheet is used. Stick on the surface of artificial ground G.

  The periphery of the waterproof layer 1 is surrounded by, for example, an annular frame 2 formed by molding a lightweight concrete material, and a drainage channel 21 extends in one side of the frame 2. In addition, the height dimension of the waterproof layer 1 mentioned above is made to incline so that it may become low gradually toward one side from the other side of this frame part 2, and the water and rain water supplied in the frame part 2 are waterproof layer 1 It is guided into the drainage 21 according to the inclination of this, and is discharged by the drainage 21 from the frame 2 to the outside.

  A promenade 4 to be described later can be formed in an appropriate area on the waterproof layer 1, but when forming such a promenade 4, a plurality of, for example, wave plate members are used in a portion crossing the above-mentioned inclination of the waterproof layer 1 The water passages 3 (, 3,...) Are provided at appropriate places following the above-mentioned inclination of the waterproof layer 1 to secure drainage to the drainage channel 21. Then, a support member formed by forming, for example, a welding wire mesh in a U shape is externally fitted to the water flow passage 3 (, 3,...), And water permeability is provided on the water flow passage 3 (, 3,. The walkway 4 is formed using a lightweight concrete material or the like.

  On the other hand, the area other than the promenade 4 on the waterproof layer 1 is customer soil so that the soil for planting S1 described later has a depth of 10 cm or less, preferably about 5 cm to 6 cm, A resin net member 5 is extended at an appropriate distance from the waterproof layer 1 inside the greening soil S1. The net member 5 has a mesh size of about 20 mm to about 30 mm, and is disposed at a height of about 10 mm to about 15 mm of the waterproof layer. The edge of the net member 5 is fixed to the waterproof layer 1, and the root of the tree planted in the revegetation soil S1 is entangled with the net member 5 to prevent windfall of the tree.

  A water supply hose 6 having a plurality of fine holes (not shown) opened at appropriate intervals in the longitudinal direction is disposed at an appropriate position on the greening soil S1 customer soiled in the waterproof layer 1 The water is dropped from each of the fine holes of the water supply hose 6. Also, instead of the water supply hose 6 or together with the water supply hose 6, micro sprinklers 7, 7, ... performing a relatively small amount of water distribution are disposed at appropriate positions on the greening soil S1, and each micro The sprinklers 7, 7,... Operate for a predetermined time at each time preset by the controller 8.

  In this artificial ground revegetation system, plantings of tree seedlings grown in advance to an appropriate size as described later are planted.

FIG.2 and FIG.3 is the perspective view and sectional drawing which show the raising seedling box for cultivating the seedling of the plant used for planting.
As shown in FIG. 2 and FIG. 3, the nursery box 10 has a box shape having a rectangular plan view, and the bottom plate 12 can be detached by an annular support portion 11 a protruding on the inner surface near the bottom of the surrounding wall 11 It is supported. The bottom plate 12 is provided with, for example, a plurality of bowl-like pores 14, 14,... So that drainage can be maintained well. Note that one side wall portion of the surrounding wall 11 may be configured to be able to be opened and closed. In addition, the shape of the pores 14, 14,... May be an appropriate shape such as a circular shape or a polygonal shape.

  The soiling soil S2 for planting at the time of nursery planting to be described later in the nursery box 10 has a depth substantially the same as the depth of the soiling soil S1 on the artificial ground G described above, ie a depth of 10 cm or less, preferably about 5 cm to 6 cm It is designed to be filled to a certain depth. Then, the seedlings germinated in a pot or the like are transplanted into the greening soil S2 filled in the nursery box 10, and the sunlight, water and fertilizer are sufficiently given to grow the seedlings. In addition, according to the kind and growth season of the transplanted tree, the inside of a greenhouse or the outdoors is suitably selected as a nursery place of a seedling.

Next, the soil for planting according to the present invention will be described.
The soil for tree planting according to the present invention is configured by mixing agate and clay so as to have a predetermined ratio. A porous natural stone or artificial stone having multiple open cells, that is, a multi-connected porous stone can be used as a pebble, such as perlite made of bola earth, or pearlite and rosin, etc. The diameter should be approximately 2 mm or more and 4 mm or less.

  Here, in the case of greening soil using stones such as pumice with many holes formed only on the surface or stones without air bubbles, drainage is bad and root rot occurs in the planted trees There is a risk. On the other hand, in the case of soil for revegetation using multi-communication pore stone, even if it is a mixture of clay, water moves through the communication pore in the adjacent multi-communication pore stone. It is well drained from the revegetation soil, and rooted rot does not occur in the planted trees. On the other hand, since water and fertilizer dissolved in water are held in the communication pores of the multi-communication pore stone, they are excellent in water holding capacity and fertility.

  In addition, when the particle size of the multi-connected pore stone is less than about 2 mm, the density of the moss is relatively high, and therefore the density (mass / volume) of the soil for greening mixed with the moss becomes excessive. It can not be used for planting of artificial ground. On the other hand, it has been obtained that the fact that the particle diameter of the multi-communication pore stone exceeds about 4 mm adversely affects the growth of the planted tree. On the other hand, in the case of a revegetation soil using multi-communication pore stone having a particle diameter of about 2 mm or more and about 4 mm or less, it has a density that can be used for replanting artificial ground. There is no risk of adversely affecting

  On the other hand, although it does not specifically limit as a clay used for the soil for afforestation, It is good to refrain from use of what formed the aggregate structure like a red ball soil, or to use, after destroying an aggregate structure.

  Thus, although the soil for revegetation according to the present invention is constituted by mixing the weir and the clay in a predetermined ratio, the constituents of the weir do not elute from the weir, and the clay is a natural product. Because it is safe for the environment. On the other hand, while clay is excellent in the ability to retain fertilizer, it does not have adsorption of specific nutrients such as adsorption of phosphorus by aluminum, so that fertilization management is easy.

  Further, in the greening method according to the present invention, the ratio at which the mulberry and the clay are mixed differs between the one at the time of raising the seedlings and the one at the time of the planting of the above-mentioned artificial ground revegetation system. That is, in the greening soil S1 on the artificial ground G, the ratio of clay mixed in the weir is 21% by mass to 38% by mass, preferably 25% by mass to 36% by mass, and further, Preferably it is 28 to 33 mass%.

  If the proportion of mixed clay to be mixed into the weir in the revegetation soil S1 is less than 21% by mass, the water permeability of the revegetation soil is high but the water retention capacity is weak, and therefore the amount of irrigation must be increased. Also, because the ability to retain fertilizer was insufficient, when the cultivation period reached about 3 years, apparent poor growth was observed in the planted trees. On the other hand, when the ratio of the clay mixed in the pot exceeds 38% by mass, the water retention capacity of the revegetation soil becomes excessive, so that a high temperature failure occurs at the end of the rainy season. On the other hand, when the proportion of clay mixed in the pot is 21 mass% or more and 38 mass% or less, the water retention capacity and permeability of the soil for greening are well-balanced, and the required fertility is also maintained. And planted trees can be grown for a long time without causing high temperature damage.

  On the other hand, when the proportion of the clay mixed in the pot is 25% by mass or more in the revegetation soil S1, the water retentivity and the fertilization ability of the revegetation soil S1 are improved, so that the plants can be grown favorably. Moreover, when the ratio of the clay mixed to a pot is 36 mass% or less, the water permeability of the said planting soil S1 can be maintained highly, and the root of the planted plant can be kept healthy.

  Furthermore, in the case where the proportion of clay to be mixed in the pot is 28% by mass to 33% by mass, the balance between the water holding capacity and the water permeability of the soil for greening is good, and the plant is good for many years. Can be grown. Moreover, not only the high temperature disorder at the time of the rainy season dawn can be avoided, but freezing does not occur in the soil for planting S1 even in winter, and the planted plants can be protected.

  By the way, when growing a seedling with the nursery box 10, since the said nursery box 10 can be moved freely, temperature management and water management can be implemented freely. On the other hand, the higher the ratio of mixing clay with high fertility, the better the growth of plants. Therefore, the greening soil S2 filled in the nursery box 10 is made larger than the ratio of the clay constituting the greening soil S1 used on the artificial ground G. By this, the growth of a seedling becomes favorable and a strong seedling can be obtained.

  On the other hand, even in the case of the soiling soil S2 used in the nursery box 10, when the proportion of clay mixed in the straw is 40% by mass or more, the water in the soiling soil S2 becomes excessive, which hinders the growth of the seedlings. The soiling soil S2 is used in which the proportion of clay mixed in the kiln is less than 40% by mass.

  Based on the above, according to the inventors of the present invention, in the revegetation soil S1 laid on the artificial ground G, the proportion of clay mixed in the weir is about 30% by mass, and it is filled in the nursery box 10 In the greening soil S2, when the ratio of the clay mixed in the pot is about 32 mass%, it was found that the growth of the plant planted in the greening soil S1 is more suitable. That is, about the soil S1 for revegetation laid on the artificial ground G, if the ratio of the clay mixed in the pot is approximately 30% by mass, the planted plants can be grown best. This is a balance between the water holding capacity and the water permeability of the soiling soil S1 and the balance between the water holding ability and the growth ability of the planted plant on the artificial ground G. Not too late, it is considered to be done very well.

  On the other hand, in the case of the greening soil S2 to be filled in the nursery box 10, the permeability of the greening soil S2 filled can be made higher by adjusting the holding condition of the nursery box 10. The seedling can be grown larger and more quickly by improving the leveling ability by using the afforestation soil S2 in which the proportion of the clay to be mixed in the straw is approximately 32% by mass.

  In addition, in these soil S1 for tree planting and soil S2 for tree planting, materials for soil such as coconut peat, humus soil, wood chips and / or materials for fertilizer such as fermented chicken manure, chemical fertilizer etc. Etc. can be included in the range of about 2% by mass to about 5% by mass with respect to the mass of the cocoon and the clay, but the ratio is not limited to this.

Next, the greening method according to the present invention will be further described.
As described above, the soiling soil S2 for planting in the nursery box 10 shown in FIGS. 2 and 3 has a depth substantially the same as the depth of the soiling soil S1 on the artificial ground G described above, that is, 10 cm or less, Is filled to a depth of about 5 cm to about 6 cm, and the seedlings sprouted in a pot or the like are transplanted into the soil for revegetation, and sunlight, water and fertilizer are sufficiently given to grow the seedlings. In addition, according to the kind and growth season of the transplanted tree, the inside of a greenhouse or the outdoors is suitably selected as a nursery place of a seedling. Although the cultivation period of the seedlings in the nursery box 10 varies depending on the type of the seedlings, it is preferable to cultivate for several months to several years. Fertilizer is given beforehand and / or at an appropriate timing after planting.

  Thus, while the seedlings are sufficiently grown in the nursery box 10, as shown in FIG. 1, the depth of the planting soil S1 on the artificial ground G is substantially the same as the depth of the planting soil S2 filled in the nursery box 10. It is laid so as to be deep, and the seedlings in the nursery box 10 are planted into the greening soil S1 on the artificial ground G. Prior to planting the seedlings, work is done to cut the roots of the seedlings taken out of the nursery box 10, as described above, for the depth of the soiling soil S2 in the nursery box 10 and for planting on the artificial ground G Since the depth of the soil S2 is substantially the same, the roots of the seedlings taken out from the nursery box 10 need not be cut almost at all, and the vitality of the seedlings can be maintained.

  In order to plant the seedlings into the revegetation soil S1 on the artificial ground G, the roots of the seedlings taken out from the nursery box 10 are in contact with the above-mentioned net member 5. Since the roots of seedlings planted in this manner extend while being entangled in the net member 5, the grown plants are firmly supported by the waterproof layer 1 through the net member 5, thereby preventing windfall of the plants. Ru. In addition, it is good to connect between the trunk part of a seedling and the net member 5 by the string made of resin etc. as needed. This can further prevent windfall of the seedlings.

Then, operate the water supply hose 6 and / or the micro sprinkler 7, 7, ... as described above, for example, watering of an amount of about 200 ml or more and about 500 ml or less per 1 m ² per minute, or about 15 minutes every day in summer Conduct in the winter, and carry out for about 10 minutes every 3 days. Fertilizer is given beforehand and / or at an appropriate timing after planting.

Next, the results of the comparison test will be described.
The following Tables 1 and 2 show the results of the comparative tests. Table 1 is a planting soil grown on artificial ground by planting a revegetation soil having different proportions of mixing clay into the pot. Also, Table 2 shows the case where plants are grown by filling up a nursery box with a revegetation soil in which the proportions of mixing clay with the koji are different.

  The comparison test was performed as follows. That is, in Table 1, rubber sheets were spread on concrete, and the greening soils having different proportions of mixed clay from 20% by mass to 40% by mass were each 6 cm deep I laid it to be. In addition, each test area in which the ratio of the mixed clay was different was made mutually independent. In each of the test areas mentioned above, the plants were grown for about 6 months in a nursery box filled with soil for revegetation, in which clay and straw were mixed to a ratio of 32% by mass and 68% by mass in each test area. The planted seedlings are grown for 3 years while each planting planted in the planting soil and supplying water to the planting soil in an amount corresponding to each test area, and the height and thickness of the trunk in each plant and the root Based on the results of visualizing the situation etc. and the rule of thumb, the degree of growth of the seedlings was determined. The growth degree is higher as the number of plus signs is larger.

  Similarly, in Table 2, a plurality of seedlings are provided with a bottom plate having a plurality of bowl-like pores of which one side is 4 mm open in a peripheral wall having dimensions of 36 cm long, 51 cm wide and 8 cm deep. Using a box, each growing box was filled with a revegetation soil having a ratio of mixed clay varied between 28% by mass and 40% by mass to a depth of 6 cm. Seedlings are planted in each growing box, and the planted seedlings are grown for 6 months while supplying water to the soil for planting in an amount corresponding to each test area, and the growth degree of the seedlings in each growing box as before. I asked for. On the other hand, when growing seedlings in a nursery box, the nursery box itself is excellent in water permeability, and since the nursery box can be freely moved, moisture management can be implemented dynamically, but it is dynamic. Since it takes time and effort to carry out the water management, the time and effort required was determined as the management degree based on the rule of thumb. As the degree of management requires more labor as the number of plus signs increases, it is not suitable for the greening method.

  As apparent from Table 1, when the proportion of the clay mixed in the straw is less than 21% by mass, when the cultivation period reaches about 3 years, apparent poor growth was observed in the planted trees. On the other hand, when the ratio of the clay mixed in the pot exceeds 38% by mass, the water retention capacity of the revegetation soil becomes excessive, so that high temperature failure occurs at the time of the rainy season. On the other hand, when the ratio of the clay mixed in the straw was 21 mass% or more and 38 mass% or less, the planted tree could be cultivated for a long time without causing the poor growth and the high temperature failure. .

  Moreover, when the ratio of the clay mixed in the crucible was 25 mass% or more and 36 mass% or less, the growth degree was improving. Furthermore, in the case where the proportion of clay mixed in the pot is 28 mass% or more and 33 mass% or less, the balance between the water holding capacity and the water permeability of the soil for greening is good, and It was possible to grow better.

  On the other hand, as is clear from Table 2, even in the case of cultivation in a nursery box, when the proportion of clay mixed in the kiln is 40% by mass, in the soil for revegetation despite being managed in a thick manner Too much water, which disturbed the growth of seedlings. In addition, when the proportion of clay mixed in straw is 28% by mass, although the growth degree is common, a relatively large amount of water is required, so the management degree is high and many seedlings are grown. It was judged to be inappropriate.

  On the other hand, when the ratio of the clay mixed in the straw was 30 mass% or more and 38 mass% or less, the growth of the seedlings became favorable with little effort, and a strong seedling could be obtained. In particular, when the proportion of the clay mixed in the straw was 32% by mass, the growth of the root of the seedling was good, and it was able to be finished in the best root condition when planting to the revegetation soil on the artificial ground.

Reference Signs List 1 waterproof layer 2 frame portion 3 water passage 5 net member 6 hose for water supply 7 micro sprinkler 10 nursery box 12 bottom plate 14 pore G artificial ground S1 soil for greening S2 soil for greening

Claims (10)

In the method of planting a plant on the revegetation soil laid on the artificial ground and greening the artificial ground,
The above-mentioned soil for revegetation contains straw and clay mixed at a predetermined ratio,
When cultivating the seedlings of the plant in advance in the soil for revegetation filled in the nursery box, and planting the obtained seedlings on the soil for revegetation on the artificial ground,
On the artificial ground, a soil for revegetation with a ratio of clay of 21% by mass to 38% by mass is used,
The greening method characterized by using the soil for afforestation whose ratio of a clay is 30 mass% or more and 38 mass% or less for the said nursery box.   The greening method according to claim 1, wherein the greening soil having a ratio of clay of 25% by mass to 36% by mass is used on the artificial ground.   The greening method according to claim 1, wherein a soil for planting of 28 mass% or more and 33 mass% or less is used on the artificial ground.   The greening method according to claim 1, wherein the greening soil having a proportion of clay of about 30% by mass is used on the artificial ground, and the soil for forming a greenery having a proportion of clay of about 32% by mass is used for the nursery box.   The greening method according to any one of claims 1 to 4, wherein a porous natural stone or artificial stone having a plurality of communicating cells is used as the weir.   The tree planting method according to any one of claims 1 to 5, wherein the depth of the revegetation soil to be laid on the artificial ground and the depth of the revegetation soil to be filled in the nursery box are substantially the same. In greening soil which is laid on the said artificial ground and is planted there in order to plant green on artificial ground,
What is claimed is: 1. A soil for revegetation comprising a clay and a clay mixed at a predetermined ratio, wherein the ratio of the clay is 21% by mass to 38% by mass. In cultivating the seedlings of the plant in advance in the revegetation soil filled in the nursery box, and planting the obtained seedlings on the replanting soil on the artificial ground,
The soil for greening to be filled in the nursery box also comprises mulberry and clay mixed at a predetermined ratio, and the ratio of the clay is 30% by mass to 38% by mass. Soil for revegetation. The proportion of clay contained in the revegetation soil laid on the artificial ground is approximately 30% by mass,
The soil for revegetation according to claim 8, wherein the proportion of clay contained in the revegetation soil to be filled in the nursery box is approximately 32% by mass. The soil for revegetation according to any one of claims 7 to 9, wherein the weir is a porous natural stone or artificial stone having a plurality of open cells.

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