JPH04320621A - Greening bed material - Google Patents

Abstract

PURPOSE:To obtain a greening bed material having post-planting care, tack and water retention characteristics, preventing outflow of seed and withering, especially from sowing of seed to germination, having excellent workability, being stably and readily executed. CONSTITUTION:A greening bed material comprising both (a) at least one selected from starch pulp and a carboxymethyl ether salt of starch pulp and (b) at least one of a hydroxy acid and a carboxylic acid.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to the stabilization of a new slope greening foundation used in a slope greening method by seed spraying, and the promotion of germination and growth of plants.

0002

[Prior Art] As a conventional slope greening method, a greening base material mainly consisting of bark compost and peat moss is combined with seeds, fertilizers, water and, for example, Japanese Patent Laid-Open No. 63-55217, Japanese Patent Laid-Open No. 6
As described in Publication No. 3-226411, etc., greening base materials are created using caking agents such as polyvinyl alcohol (PVA) and vinyl acetate emulsions, and water retaining materials such as polyacrylic acid-based water-absorbing resins. Attempts are being made to stabilize the However, with such conventional base materials using bark bark and peat moss, the entire base material becomes dense and air permeability is lost, and the soil surface hardens due to drying and hardness decreases. This has the disadvantage of deteriorating the germination properties of seeds and causing poor growth. Furthermore, under the current circumstances, unless favorable conditions such as the geology of the slope and the weather overlap, heavy rains will easily wash away the curing materials and seeds, and conversely, if there is no rain, poor germination due to dryness will occur. Furthermore, since peat moss is imported from Canada and the Soviet Union, it is expensive and is expected to become difficult to obtain in the near future, which also poses a problem in terms of resources.

0003

[Problems to be Solved by the Invention] Therefore, the present invention solves the above-mentioned drawbacks of the prior art and has a combination of curing properties, adhesive properties, and water retention properties, and particularly aims to reduce the flow of seeds between seed sowing and germination. The object of the present invention is to provide a base material that prevents drying and withering, has good workability, and is easy to perform stable construction.

0004

[Means for Solving the Problems] The present inventors have proposed to use starch meal and/or starch meal carboxymethyl ether salt (hereinafter referred to as CML) generated from Japanese agricultural products together with oxyacid and/or carboxylic acid. By using
Curing properties, adhesiveness, water retention properties necessary for geology and seed germination,
The present invention has been accomplished by discovering that it is possible to provide a greening base material that has breathability. That is, the greening base material of the present invention is characterized by containing (a) at least one selected from starch meal and CML, and (b) at least one selected from oxyacid and carboxylic acid. , These include fertilizers such as bark compost, soil improvement materials such as peat moss,
It may also be used in combination with earth and sand.

[0005] The starch lees used in the present invention are generally the lees after starch has been removed from various agricultural products, and are mainly composed of starch and fibers, and are usually dried to a moisture content of 20% or less. used as a thing. For example, sweet potato starch meal, potato starch meal, corn starch meal, soybean starch meal, barley starch meal, wheat starch meal, arrowroot starch meal, rice starch meal, etc. can all be used, and even if these are used as a single product, , may be used as a mixture of two or more types. In addition, starch meal is 10 to 9 in the greening base material of the present invention.
Preferably, it is used in a proportion of 0% by weight.

Next, CML generally has an average degree of ether substitution by carboxymethyl groups of 0.1 to 1.5;
It is particularly preferable to use about 0.1 to 1.0, and the amount used is not particularly limited, but if it is used at a rate of about 0.1 to 20% by weight in the greening base material of the present invention. good.

[0007] CML is obtained, for example, by adding an alkali to starch lees and then reacting with monochloroacetic acid or an alkali monochloroacetic acid salt to cause an etherification reaction, followed by purification with an aqueous methanol solution and drying. The raw material for CML may be a single starch meal or a mixture thereof. In addition, the types of ether salts of CML include sodium (Na) salt at the carboxymethyl group,
Examples include potassium (K) salt, lithium (Li) salt, calcium (Ca) salt, ammonium (NH4) salt, and the like, but are not limited to these.

[0008] Examples of the oxyacid and carboxylic acid used in the present invention include citric acid, malic acid, tartaric acid, lactic acid, glycolic acid, gallic acid, stearic acid, linoleic acid, valeric acid, and acetic acid. However, it is not limited to these. The amount of oxyacid and/or carboxylic acid to be used is not particularly limited, but it is generally preferable to use the oxyacid and/or carboxylic acid in a proportion of about 0.1 to 2% by weight in the greening base material of the present invention.

[0009] When the greening base material of the present invention containing starch meal and/or CML and oxyacid and/or carboxylic acid is used, the condition of the slope after seed spraying becomes sticky in a wet state. The surface after spraying is soft, promotes germination, and has water retention properties. This is the starch meal and CM that constitute the base material according to the present invention.
This is because L has water-retaining properties and suppresses the drying rate caused by the adhesive component. Note that it is particularly preferable to use starch lees, which have excellent water retention properties, and CML, which is an adhesive component and has an appropriate water absorption property, in combination.

Furthermore, according to the present invention, by blending oxyacid and/or carboxylic acid, it is possible to produce a slope greening base material with a pH value suitable for geological and natural conditions, and the effect of promoting seed germination is improved. Both germination rate and water retention can be maintained at a very high level.

[0011] Furthermore, since starch meal and various bark composts used in combination as necessary are generally alkaline, their use makes it possible to improve slope slopes, which is particularly effective in areas where the slope geology is acidic or where there is a lot of acid rain. It will also be possible to manufacture greening base materials. In addition, since the base material of the present invention is an organic material, it has a good effect on effective bacteria due to biodegradation, and is also excellent in promoting the growth of plants.

0012

EXAMPLES Next, examples of the present invention will be shown, but the present invention is not limited to these examples. In addition,
The test method in the Examples is shown below, and the test period was from September to December, and the Examples and Comparative Examples were all conducted on the same day. [Germination rate] Seeds were added to the base material consisting of starch meal and/or CML, and bark compost, mixed uniformly, and then water was added and kneaded.
Spray on a 0° concrete artificial slope to a thickness of 3 cm with a dry mortar gun (BO type, manufactured by Nogami Seisakusho) and leave it outdoors (with a roof). The number of germination is determined after one week, and the percentage of the theoretical number of germination is defined as the germination rate. [Disintegration rate] Add water to a mixture (base material) of starch meal and/or CML and bark compost from which seeds have been removed from the above germination rate test, mix, spray using the same method as above, and place outdoors (with a roof). ). After one week, the whole slope is uniformly 3
Artificial rain was applied at a rate of 6,000 cc per minute, the amount of runoff was measured, and the percentage of the original base material was taken as the collapse rate. [Water retention rate] Add water to a mixture (base material) of starch meal and/or CML and bark compost from which seeds have been removed in the same manner as in the above test, knead the mixture, and mix it outdoors (with a roof, outside humidity 2
One week after spraying, the water retention rate is defined as the percentage of the remaining water content relative to the water content of the base material at the time of spraying.

Example 1 Sweet potato starch meal 5.0 kg (25% by weight), bark compost 14.4 kg (72% by weight) and CML 0.4 kg (
2% by weight) and 0.2kg (1% by weight) of citric acid, and 100 seeds of Weeping Love Grass were evenly mixed into the base material to create an artificial concrete slope measuring 37cm long x 92cm wide and having a slope of 60°. Add 1 cup of water to a thickness of 3 cm.
5 liters were gradually added and sprayed using a small mortar gun. The seeds were left outdoors (with a roof) for one week, and then the number of germination was counted and the germination rate was determined. An experiment similar to that described above was conducted except that no seeds were added, and the decay rate of the greening base material after one week was calculated.・Table 1 along with the results of determining the water retention rate
Shown below.

Example 2 Bark compost 19.36 kg (96.8% by weight), CM
L0.4kg (2% by weight), α-malic acid 0.24kg
(1.2% by weight), 100 seeds of Weeping Love Grass were uniformly mixed into the base material, and an experiment exactly the same as in Example 1 was conducted. Table 1 shows the results of germination rate, disintegration rate, and water retention rate.

Examples 3 to 5 100 seeds of weeping love grass were uniformly mixed into 20 kg of the base material having the composition shown in Table 1, and various oxyacids and/or carboxylic acids were used. An experiment completely similar to Example 1 was conducted. Table 1 shows the results of germination rate, disintegration rate, and water retention rate.

Comparative Example 1 Green mat 4 kg (20% by weight), peat moss 3 kg
(15% by weight), bark compost 12.6kg (63% by weight)
), commercially available vinyl acetate emulsion 0 as a caking agent.
．． An experiment similar to Example 1 was conducted using a base material mixed with 4 kg (2% by weight). Table 1 shows the results of germination rate, disintegration rate, and water retention rate.

Comparative Example 2 Except for using 3 kg of peat moss (15% by weight), 16.6 kg of bark compost (83% by weight) and 0.4 kg of vinyl acetate emulsion (2% by weight) as the base material,
An experiment completely similar to Example 1 was conducted. germination rate, decay rate,
Table 1 shows the results of determining the water retention rate.

[0018]

[Table 1]

[0019]

[Effect of the invention] The base material of the present invention has curing properties, adhesive properties,
Since it has all the water-retaining properties, there is no need to add a caking agent or a water-retaining agent, and the pH can be easily adjusted, so it can be used with good workability under any geological and natural conditions. Further, in the present invention, since starch meal, which is a by-product of agricultural products, is used, a base material with stable quality can be obtained very economically. In addition, the base material of the present invention not only prevents seeds from flowing out and dying during the period from sowing to germination, but also has quick dispersibility in water, so spraying operations can be greatly improved.

Claims (1)

[Claims] Claim 1: (a) at least one selected from starch meal and carboxymethyl ether salt of starch meal; and (
b) A greening base material containing at least one selected from oxyacids and carboxylic acids.