JPH11157968A - Lawn leaf color preservative - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject preservative by including iron gluconate as an active ingredient with on need of using any EDTA iron salt hampering solubilizing heavy metals and the efficacy of fertilizer for phosphoric acid. SOLUTION: This lawn leaf color preservative comprises at least one kind selected from iron sulfate, iron nitrate and iron chloride, and iron gluconate as active ingredients, wherein the iron of iron gluconate origin accounts for >=25 (pref. >=40) wt.% of the total iron, and this iron level will be enough. More specifically, this preservative is obtained by mixed reaction between one kind of compound such as iron sulface, iron nitrate, or iron chloride, another kind of compound such as acetic acid, citric acid or lactic acid, gluconic acid, slaked lime, and water followed by clear filtration into an aqueous solution with pH 2.0-4.5. This preservative is easier to handle in the case of feeding in a liquid state than in the form of powder. For liquid form, this preservative is pref. pH 2.0-4.5. When to be used, this preservative is in the form of an aqueous solution 50-300 ppm in iron content, its amount to be applied being 20-30 mg on an iron basis per m<2> of lawn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Alternatively, the present invention relates to a leaf color preserving agent for treating turf yellowing and maintaining healthy growth.

[0002]

2. Description of the Related Art When iron salt is applied to turf, the leaf color of turf is maintained,
It is known to help with yellowing treatment and increase health.

[0003] Japanese Patent Application Laid-Open No. 47-16628 discloses a remedy for lawn yellowing containing a water-soluble iron compound as an active ingredient. As the water-soluble iron compound, ferrous sulfate, ferric chloride, ferric nitrate, and iron citrate are intended.

[0004] Japanese Patent Publication No. 59-25760 describes a turf spraying agent comprising an iron salt, ethylenediaminetetraacetic acid, a sucrose fatty acid ester, an alkylbenzene sulfonate and urea. As the iron salts, inorganic salts such as ferrous or ferric salts such as sulfuric acid, hydrochloric acid and nitric acid, and iron ethylenediaminetetraacetate are described. It is described that when only ferrous sulfate is applied, the turf turns green with a black or purple color, and no direct effect is observed on the turf only with the application of iron ethylenediaminetetraacetate.

Japanese Patent Application Laid-Open No. 61-132581 discloses a method in which an aqueous solution containing ethylenediaminetetraacetic acid (hereinafter abbreviated as EDTA) iron ammonium salt as a main component and a required amount of trace elements such as Mg and Mn is sprayed on a lawn. A lawn greening agent for measuring chlorophyll growth has been disclosed. Also, an aqueous solution of an iron salt of an organic compound (for example, nitroso NW acid / nitrososhefferic acid) which forms a green color by chelating with iron is used alone or in combination with an iron ammonium salt of ethylenediaminetetraacetic acid. A lawn greening agent for measuring chlorophyll growth by iron or other supplementation has been disclosed.

Of these, inorganic iron salts include iron citrate and E
It is known that the effect is inferior to that of DTA iron salt, and when an inorganic iron salt is excessively applied in order to make up for this, there is a disadvantage that the turf leaf color becomes dark.

[0007] In the organic iron salt has been known that a high effect of EDTA iron salts, in the golf ethylenediaminetetraacetic acid iron sodium (EDTA · FENA) and ethylenediaminetetraacetic acid iron ammonium (EDTA · FeNH ₄₎
Drugs based on have been used as turf leaf color preservatives.

[0008]

SUMMARY OF THE INVENTION EDTA, a chelator of iron salt of EDTA, is a chemically synthesized product that does not exist naturally in the natural world, easily remains in the environment, and is concerned about environmental aspects such as solubilization of soil heavy metals. EDTA iron salt is EDT
Due to the large size of the A molecule, it is not necessarily absorptive, so it must be applied in excess of the required amount, but after the excess iron separates from EDTA, it forms a water-insoluble salt with phosphoric acid, Since the fertilizing effect of phosphoric acid is inhibited, there is an uneconomical aspect that the application of phosphoric acid and the like must be increased. However, as an iron salt, no turf leaf color preserving agent superior to EDTA iron salt has hitherto appeared on the market.
An object of the present invention is to provide an agent that retains the color of turf leaves without using an EDTA iron salt that inhibits solubilization of soil heavy metals and fertilization effect of phosphate.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have excellent iron absorbability and transferability, which naturally exist in nature, and which plants and the like can normally metabolize. Iron salts which do not remain in the environment and whose safety has been confirmed as a food additive were investigated. As a result, they have found that iron salts of gluconic acid have a remarkable effect as a lawn leaf color preservative, and that they can solve the problem if used. Furthermore, they have found that the use of an iron salt of gluconic acid can provide a performance close to that of an iron salt of gluconic acid alone even when an inorganic iron salt is used in combination.

That is, the present invention is a lawn leaf color preservative containing iron gluconate as an active ingredient. More specifically, the present invention relates to at least one selected from the group consisting of iron sulfate, iron nitrate and iron chloride, and gluconic acid. A lawn leaf color preserving agent containing iron and iron as an active ingredient, wherein iron derived from iron gluconate in iron is 25% by weight or more, preferably 40% by weight or more. More specifically, iron sulphate, iron nitrate, at least one selected from the group consisting of iron chloride, acetic acid, citric acid, at least one selected from the group consisting of lactic acid, gluconic acid, slaked lime, water and mixed reaction A turf leaf color preservative obtained by clarifying and filtering. Also P
The lawn leaf color preserving agent is an aqueous solution of H2.0 to PH4.5.

As the iron gluconate used in the present invention, ferrous gluconate or a solution obtained by dissolving the same in water to prepare an aqueous solution or diluting a solution obtained by reacting iron and gluconic acid in water to an appropriate concentration is used. Can be used. The term “gluconic acid” in the present invention includes “glucono delta lactone”, which generates gluconic acid when converted into an aqueous solution, as a concept. Gluconic acid, glucono delta lactone and ferrous gluconate are all food additives, and their safety has been confirmed.

The reaction between gluconic acid and iron is carried out by (1) a method of reacting gluconic acid with iron powder or reduced iron in water, (2)
A method of reacting gluconic acid with iron hydroxide or iron carbonate in water; (3) gluconic acid, slaked lime and sulfuric acid in water
There is a method of reacting iron and removing the precipitate of calcium sulfate generated. The last method (3) is the most preferable method, and there is no danger of instability of the reactants and danger of reaction by-products, and a mixture of an aqueous solution of ferrous gluconate and ferrous sulfate can be prepared in an arbitrary mixture. . Further, ferrous gluconate usually dissolves only less than 20% by weight (less than 2% by weight as iron), but according to the method (3), a stable high concentration solution of 5% by weight or more of Fe can be easily prepared. It is preferred.

The iron sulfate, iron nitrate and iron chloride to be mixed as inorganic iron are ferrous sulfate, ferric sulfate, ferric nitrate and ferrous chloride.
Iron and ferric chloride are used. The mixing ratio of iron gluconate and inorganic iron may be such that iron derived from iron gluconate is at least 25% by weight, preferably at least 40% by weight of the total amount of iron. It is preferable to replace a part of the inorganic iron salt with at least one of iron acetate, iron formate, iron citrate, and iron lactate, because the leaf color can be further improved and the liquid property can be stabilized.

The turf leaf color preservative of the present invention is easier to handle when supplied in liquid form than in powder. In the case of a liquid, it is preferable to make it acidic at pH 2.0 to 4.5. If the pH exceeds 4.5, the stability of the solution is poor, and the pH is 2
If it is less than pH, the pH at the time of use is low, and phytotoxicity due to pH is likely to occur.

From the viewpoint of transportation cost and handling, a high-concentration preparation containing 5% by weight or more of Fe is preferable. When the inorganic acid iron is blended, the Fe concentration in the liquid is easily increased. Further, when a reducing sugar is added to the liquid, the stability increases.

The leaf color preserving agent of the present invention is dissolved or diluted in water to be used as an aqueous solution containing 50 to 300 ppm of iron. 20~30m as lawn 1m ² per iron
g is applied. Sprinkling from late autumn to winter increases the green color of the leaves, spraying in early summer increases fertilizer absorption, promotes root elongation, and when sprayed on iron-deficient soils prevents yellowing due to iron deficiency and nitrogen content to prevent softening When you refrain from spraying, you can keep the green color.

[0017]

The mechanism by which iron gluconate is superior to iron EDTA is not clear, but the following is presumed. Primarily,
Gluconic acid has a lower molecular weight than EDTA. Secondly,
Gluconic acid is a sugar analog (an oxide of glucose) and has high biocompatibility. Third, gluconic acid has a higher chelating capacity of iron than EDTA. Fourth, after the transfer of iron, gluconic acid is converted to gluconic acid-6-phosphate through H
It is metabolized in the ME circuit and becomes an energy source. Fifth, since gluconic acid is easily biodegraded, it has no side effects such as remaining in the environment and chelating heavy metals. From these facts, it is considered that the use of the iron salt of gluconic acid absorbs the iron of the turf better than the iron salt of the EDTA, and also serves as an energy source.

Further, when iron gluconate and an inorganic iron salt are used in combination, the following is presumed. Ferrous gluconate is gluconic acid: iron = 2: 1, while the iron chelate of gluconic acid is gluconic acid: iron = 1: 1 to 1: 4, and gluconic acid chelate inorganic salt Fe. It is considered that the effect close to the single use of ferrous gluconate can be obtained due to the presence of the iron oxide.

[0019]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which by no means limit the present invention. Example 1 10 g of ferrous gluconate was dissolved in 90 g of water to prepare a liquid lawn leaf color preservative. pH 4.0.

(Example 2) Glucono delta lactone 3
5.3 g, 6.9 g of slaked lime, 43.8 g of water, and 26.2 g of ferrous sulfate heptahydrate were mixed and reacted, and clarified and filtered to remove the precipitate (calcium sulfate). Had made. In this solution, about 75% of ferrous sulfate supplied by the mixing reaction at a total iron content of 5.0% by weight and a pH of 3.3 was changed to iron gluconate.

Example 3 Glucono delta lactone 2
6.5 g, slaked lime 5.2 g, water 51.3 g, ferrous sulfate heptahydrate 26.2 g were mixed and reacted, and clarified and filtered to remove the precipitate (calcium sulfate). Had made. In this solution, about 65% of ferrous sulfate supplied by the mixing reaction at a total iron content of 5.0% by weight and a pH of 3.2 was changed to iron gluconate.

(Example 4) Glucono delta lactone 1
7.6 g, 3.4 g of slaked lime, 58.7 g of water, and 26.2 g of ferrous sulfate heptahydrate were mixed and reacted, and clarified and filtered to remove precipitates (calcium sulfate). Had made. In this solution, about 50% of ferrous sulfate supplied by the mixing reaction at a total iron content of 5.0% by weight and a pH of 2.9 was changed to iron gluconate.

(Example 5) Glucono delta lactone
9 g, 1.7 g of slaked lime, 66.2 g of water, and 26.2 g of ferrous sulfate heptahydrate were mixed and reacted, and clarified and filtered to remove the precipitate (calcium sulfate), thereby producing a liquid lawn leaf color preservative. .
In this solution, about 25% of ferrous sulfate supplied by the mixing reaction at a total iron content of 5.0% by weight and a pH of 2.8 was changed to iron gluconate.

Example 6 21.3 g of a 50% by weight aqueous solution of gluconic acid, 4.2 g of an 80% by weight aqueous solution of acetic acid, 4.1 g of slaked lime, 46.4 g of water, 31.4 g of ferrous sulfate heptahydrate
, And the precipitate is filtered (calcium sulfate).
, A liquid lawn leaf color preservative was prepared. This solution had a total amount of iron of 6.0% by weight and a pH of 4.1, and about 25% by weight of ferrous sulfate introduced by the mixing reaction was changed to iron gluconate, and further 25% by weight was changed to iron acetate.

Example 7 Glucono delta lactone
9 g, formic acid 76% by weight aqueous solution 2.8 g, slaked lime 3.5
g, 64.1 g of water, and 26.2 g of ferrous sulfate heptahydrate were mixed and reacted, and clarified and filtered to remove the precipitate (calcium sulfate), thereby producing a liquid lawn leaf color preservative. This solution had a total iron content of 5.0% by weight and a pH of 4.1, and about 25% by weight of ferrous sulfate introduced by the mixing reaction was added to iron gluconate, and further added
5% by weight are each converted to iron formate.

Example 8 Glucono delta lactone
9 g, lactic acid 88% by weight aqueous solution 4.7 g, slaked lime 3.5
g, 64.3 g of water and 26.2 g of ferrous sulfate heptahydrate were mixed and reacted, and the mixture was clarified and filtered to remove precipitates (calcium sulfate) to prepare a liquid lawn leaf color preservative. This solution had a total iron content of 5.0% by weight and a pH of 4.1, and about 25% by weight of ferrous sulfate introduced by the mixing reaction was added to iron gluconate, and further added
5% by weight is converted to iron lactate.

Example 9 Glucono delta lactone
9 g, crystalline citric acid 3.3 g, slaked lime 3.5 g, water 6
4.3 g, 26.2 g of ferrous sulfate heptahydrate were mixed and reacted,
The precipitate (calcium sulfate) was removed by clarifying filtration to prepare a liquid lawn leaf color preservative. This solution had a total iron content of 5.0% by weight and a pH of 4.1. About 25% by weight of ferrous sulfate introduced by the mixing reaction was changed to iron gluconate, and further 25% by weight was changed to iron citrate. .

Example 10 Glucono delta lactone 1
7.0 g, slaked lime 3.3 g, water 49.1 g, ferrous sulfate heptahydrate 31.5 g, and crystalline maltose 5 g were mixed and reacted.
The precipitate (calcium sulfate) was removed by clarifying filtration to prepare a liquid lawn leaf color preservative. This solution had a total amount of iron of 6.0% by weight and a pH of 3.1, and about 40% by weight of ferrous sulfate charged by the mixing reaction was changed to iron gluconate.

Example 11 Ferrous Gluconate 20.0
g, ferrous sulfate heptahydrate 13.1 g, and water 66.9 g were mixed and dissolved, and clarified and filtered to prepare a liquid lawn leaf color preservative. In this solution, the total amount of iron is 5.0%, the pH is 3.1, and the amount of iron derived from iron gluconate is about 50% of the total amount of iron.

Comparative Example 1 EDTA.Fe.Na (sodium iron ethylenediaminetetraacetate) (10 g) was dissolved in water (90 g) to prepare a liquid lawn leaf color preservative.

(Comparative Example 2) 10 g of EDTA.Fe.NH ₄ (ammonium iron ammonium diaminetetraacetate) was added to 90 parts of water.
g of a liquid lawn leaf color preservative.

(Test Example 1) Bent grass cultivated in a Wagner pot was cut to a plant height of 10 mm, and the following day was applied with various leaf color preserving agents for turf. The application rate is 200m of Fe concentration
The solution diluted to g / L was adjusted to 1000 ml / m ² (150 mg / m ² as Fe). After cultivation for 10 days, the leaves were washed with a large amount of water, and the aerial parts were collected to analyze the Fe content of bentgrass leaves. The leaf color was also compared.

[0033]

[Table 1]

Test Example 2 The grass color retaining agent of Example 4 was applied at 750 ml / m ² at a 500-fold dilution every other month to bentgrass and seaweed turf. As a control, a plot without a leaf color preservative was applied.

[0035]

[Table 2]

Test Example 3 The lawn leaf color preservatives of Examples 4 and 11 were placed in a sample bottle and stored at 42 ° C. to check the stability of the solution. Example 11 was more stable. Was high.

[0037]

[Table 3]

[0038]

The turf leaf color preserving agent of the present invention is a food additive, which contains iron gluconate, which is also present in nature, as an active ingredient. Can be provided. Gluconic acid can be normally metabolized by plants and the like and does not have to worry about remaining in the environment unlike EDTA.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code FI C05D 9:02 3:02) (72) Inventor Issei Seiki Nihon Soda 2-2-1 Otemachi, Chiyoda-ku, Tokyo Inside the corporation

Claims (4)

[Claims] 1. A lawn leaf color preservative comprising iron gluconate as an active ingredient. 2. A lawn leaf color preserving agent comprising, as an active ingredient, at least one selected from the group consisting of iron sulfate, iron nitrate, and iron chloride, wherein iron derived from iron gluconate in iron is 25% by weight or more. 3. A mixture reaction of at least one selected from the group consisting of iron sulfate, iron nitrate, and iron chloride, at least one selected from the group consisting of acetic acid, citric acid, and lactic acid, with gluconic acid, slaked lime, and water. A turf leaf color preservative made by clear filtration. 4. The lawn leaf color preserving agent according to claim 1, which is an aqueous solution having a pH of 2.0 to 4.5.