JPH04120001A - Preserving agent for cut flower - Google Patents

Abstract

PURPOSE:To obtain a cut flower preserving agent containing a calcium phosphate-based compound on which an antimicrobial metal is carried, capable of exhibiting sufficient preserving effect without causing residual phytotoxicity even when applied to every cut flower and simply usable. CONSTITUTION:The aimed cut flower preserving agent obtained by carrying an antimicrobial metal such as silver, copper or platinum on a calcium phosphate-based compound (preferably hydroxyapatite) in an amount of <=50wt.%, preferably 30-0.001wt.%. As necessary, at least one kind of glucose selected from sucrose, glucose and fructose is added thereto as nutrients. The preserving agent is dispersed, suspended or dissolved in water and used as an acidic solution (e.g. of pH 2.5-6.5) having buffer action.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a preservative for cut flowers and flower arrangements to keep them fresh for a long time, and more specifically, a preservative for preserving cut flowers and flower arrangements for a long period of time. It concerns the preservatives it contains.

(Prior Art) Various preservation methods have been studied in order to keep cut flowers and flower arrangements fresh for a long time. For example, in order to increase the water absorption of cut flowers and maintain their freshness, they may be drained, rubbed with salt, crushed, baked, etc.
Addition of sugars such as glucose and sucrose, nutrients such as nitrates and potassium dihydrogen phosphate, metal salt film I1 agents such as 8-hydroxyquinoline sulfate, sodium hypochlorite, copper sulfate, silver nitrate, and chloram. Other methods exist, including using disinfectants such as phenicol and streptomycin, and metal salts and calcium phosphate (Japanese Patent Laid-Open No. 58-67602). However, these preservatives may not be able to sufficiently prolong the life of the flowers. Especially when using metal salts, depending on the salt concentration used, the type of cut flowers, etc., long-term processing may actually shorten the life of the flowers. Deterioration or chemical damage may occur.

(Problems to be Solved by the Present Invention) As mentioned above, many conventional cut flower preservatives are combinations of nutrients, fungicides, etc., but they do not necessarily have sufficient life-extending effects on various cut flowers, and in some cases In some cases, it may even show drug damage. The present invention is a highly practical cut flower preservative that eliminates the drawbacks of conventional preservatives, does not cause residual chemical damage when applied to any cut flower, exhibits a sufficient preservative effect, and is easy to use. is intended to provide.

(Means and effects for solving the problems) In order to solve the above problems, in the present invention, a calcium phosphate antibacterial agent carrying an antibacterial metal, particularly a hydroxyapatite antibacterial agent, is used as a bactericidal agent. The calcium phosphate disinfectant used in the present invention can be obtained by coexisting a water-soluble antibacterial metal salt during production of the calcium phosphate compound to be used, or by treating the calcium phosphate compound to be used with an aqueous solution of an antibacterial metal salt. After that, the product is obtained, and if necessary, the obtained product is calcined, preferably at 800° C. or higher.

The calcium phosphate compounds mentioned here mean calcium phosphate, dicalcium phosphate, and hydroxyapatite, preferably hydroxyapatite, and the antibacterial metals include silver, copper, zinc, and platinum, which are known to have antibacterial properties. preferably silver.

For example, antibacterial hydroxyapatite can be produced by adding a water-soluble salt of at least one metal selected from silver, copper, zinc, and platinum to a calcium hydroxide aqueous solution and a phosphoric acid solution using a conventional method to produce hydroxyapatite.
The resulting product can be obtained by coexisting or treating hydroxyapatite with an aqueous solution of these antibacterial metal salts, and optionally calcining, preferably at 800°C or higher. At this time, the Ca/P molar ratio of the product does not need to be the stoichiometric molar ratio of hydroxyapatite of 10/6;
A product having a molar ratio of 1.4 to 1.8 is sufficient to be used as the antibacterial hydroxyapatite of the present invention. Antibacterial calcium phosphate compounds other than antibacterial hydroxyapatite can also be easily produced according to this method.

The amount of antibacterial metal supported on the calcium phosphate compound can be arbitrarily selected depending on the purpose, but if too large a amount is supported, the structure of the calcium phosphate compound that is the carrier may change, which is not preferable. In order to maintain the original structure of the calcium phosphate compound and maintain its antibacterial properties, 5% by weight is added to the calcium phosphate compound.
0% or less, preferably 30 to 0.001% of antibacterial metal is supported.

In order to use such antibacterial calcium phosphate compounds as cut flower preservatives, they are dispersed, suspended or dissolved in water in a conventional manner, and then added to a buffered acidic solution such as p.
Used as H2.5-6.5. The content can be selected arbitrarily, and even if it is contained in a large amount, it will not cause chemical damage and will show sufficient effects, but it may be necessary to add a small amount, such as o, oot%, to obtain a stable dispersion or suspension. In this case, it is preferable to use agents conventionally used as preservatives, such as trace elements, sugars, fertilizer elements, other plant nutrients, fungicides, and oxidizing agents. I can say that. The use of preservatives containing these chemicals has traditionally been limited by the type of pores, the type and amount of chemicals used, and in some cases may not be effective or may even cause chemical damage and promote flower atrophy. even occurred. Of course,
They recognized that when these drugs coexist with antibacterial calcium phosphate compounds, they are less likely to cause harm. That is, when the antibacterial calcium phosphate compound of the present invention is used in combination with conventionally used preservatives, the preservative effect may vary depending on the drawbacks of conventional preservatives, such as the type of flower and the type and amount of the agent used. , the sustainability of the effect is poor, and it promotes flower atrophy.
The antibacterial calcium phosphate compound of the present invention is stable and therefore easy to formulate and can be safely used on any type of flower. That is, by mixing with other ingredients conventionally used as preservatives, tablets,
It can also be used in the form of granules, powders, water-soluble capsules, or concentrated solutions, and diluted with water to an optimal concentration depending on the purpose of use.

In addition, in the cut flower preservative of the present invention, types of flowers that can obtain the effect of extending the life of cut flowers include, for example, roses, carnations, orchids, gladioli, garbage, lisianthus,
Chrysanthemum, tulip, freesia, sweet pea, lily,
Iris, etc. are mentioned. It is also widely effective on various varieties of roses, such as Superstar, Sonia, and Omega, and carnations, such as Nora, Coral, and Barbara. Therefore, it will be clear that the cut flower preservative of the present invention is not limited to specific types or varieties of flowers.

Hereinafter, the present invention will be explained using representative examples.

Examples) Roses (Superstar, Omega species), carnations (
10 each of cut flowers of Barbara, Coral species) and 5 of each of gladioli were placed in separate containers containing an aqueous solution with the following composition, tap water, and 500 mg each of a commercially available preservative (comparative example), and heated at 20 to 25 degrees. The number of healthy flowers was investigated after a number of days had passed indoors in C.The water absorption amount was 100% when using tap water.
The ratio was calculated as follows.

Observe the degree of withering of each flower, The number of storage days was investigated.

Composition Ingredient Weight % (in water) Floor 1 Saccharose 2.0 Citric acid 0.03 Nα2 Saccharose 2.0 Citric acid 0.03 Nα3 Saccharose 2.0 Citric acid 0.03 NO,4 Saccharose 2.0 Citric acid 0. 03 Nα5 Saccharose 2.0 Citric acid 0.03 No, 6 Nα7 Nα8 No, 9 Nα10 11 l112 Hydroxyapatite Silver nitrate Saccharose Scitrate Silver Nitrate Sucrose Scitrate Calcium diphosphate Silver nitrate Sucrose Scitrate Zeolite Silver Sucrose Scitrate Hydroxyapatite Saccharose Scitric acid Commercial tap water 0, OO144 0,00012 2,0 0,03 0, OOO12 2,0 0,03 0, OO144 0, OOO12 2,0 0,03 0, OO378 2,0 0,03 0,00144 2 ,0 0,03 As prescribed, the results are as shown in Tables 1 to 5 Table 1 (Carnation: Barhara) Table 2 (Carnation: Coral) Table 3 (Hara: Superstar) Table 4 (Para: Omega) ) Table 5 (Gladiolus) (Effects of the Invention) The cut flower preservative according to the present invention can be obtained by a simple method, is effective on a wide range of cut flowers, and does not cause chemical damage like conventional preservatives even if used in excess. There's nothing to show. Furthermore, when used in combination with drugs conventionally used as preservatives, the chemical damage caused by conventional preservatives can be suppressed and their effects can be maintained. Therefore, it is preferred as a cut flower preservative.

Agent: Patent Attorney Hideaki Kuwahara

Claims (5)

[Claims] (1) A preservative for cut flowers and flower arrangements, characterized by containing a calcium phosphate compound carrying an antibacterial metal. (2) The preservative according to claim (1), wherein the calcium phosphate compound is hydroxyapatite. (3) The preservative according to claim (1), wherein the antibacterial metal is silver. (4) The preservative according to claim (1), which has a pH in the range of 2.5 to 6.5 when made into an aqueous solution. (5) At least one selected from sucrose, glucose and fructose
The preservative according to any one of claims (1), (2) and (3), containing 1 sugar.