JPH09136807A - Material for feeding iron to crop plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for feeding iron to crop plants by using a biodegradable specific iron compound which does not remain in the environment after the crop plants absorb iron thereby preventing iron deficiency of the crop plants and improving their quality. SOLUTION: A biodegradable iron chelate compound is used as an active ingredient. The chelate compound is, for example, an iron chelate of aspartic N-monoacetic acid, glutamic N,N-diacetic acid, or imino-disuccinic acid. This chelate compound may be a mixture of optically active isomers such as an iron chelate of (S)-aspartic N-monoacetic acid or (S,S)-ethylenediamine N,N'- disuccinic acid. The amount of the material to be applied to the crop plants is usually 0.001-100,000ppm, preferably 0.01-10,000ppm. This material can be applied to fruit trees such as orange, apple or pear, vegetable fruits such as cucumber, melon or water melon and vegetables such as radish or carrot.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a material for supplying iron to crops. The iron-supplying material of the present invention is applied directly to the leaves of agricultural and horticultural crops, fruits or seeds,
Alternatively, by applying it to the soil in which the crop is cultivated or its medium, the iron required by the crop can be supplied, and the iron deficiency of these agricultural and horticultural crops can be prevented and reduced / prevented. By supplying iron with the material for supplying iron of the present invention, iron deficiency can be prevented and reduced / prevented, and at the same time, the quality of agricultural and horticultural crops can be improved, which is extremely useful in agriculture.

[0002]

2. Description of the Related Art Conventionally, various physiological disorders due to element deficiency of agricultural and horticultural crops have been known, and the importance of trace elements in the growth of crops has been pointed out. It is known that iron plays an important role in the energy transfer system centered on the oxidation / reduction reaction in the living body and is directly involved in the biosynthetic pathway of chlorophyll. When this iron is deficient, new leaves undergo chlorosis, then become white and die if left unattended.

At present, foliar application of inorganic iron compounds such as ferrous sulfate or ferric chloride is carried out as a countermeasure against iron deficiency in agricultural and horticultural crops, but its effect is insufficient and it causes phytotoxicity. I'm worried. In contrast, chelating iron such as iron ethylenediamine tetraacetate or iron nitrilotriacetate is generally applied by foliar application or soil irrigation because it is less fixed to soil and more easily absorbed by crops than inorganic iron. ing.

[0004]

With chelated irons such as iron ethylenediaminetetraacetate and iron nitrilotriacetate used for supplying iron to crops, iron is absorbed to the crops even if iron is sufficiently supplied to the crops. After that, chelate compounds such as ethylenediaminetetraacetic acid and nitrilotriacetic acid remain in the environment. Of these chelate compounds, ethylenediaminetetraacetic acid captures and solubilizes harmful heavy metals in the environment when released into the environment. The produced heavy metal chelate may pollute groundwater. On the other hand, it has been desired to supply materials that can substitute for the above substances, such as iron nitrilotriacetate, which has been reported to have carcinogenicity by itself (active oxygen / free radical 3 (3), 376 (1992)).

[0005]

As a result of intensive studies, the present inventors have found that the following compounds have good biodegradability, and
The present invention has been completed based on the finding that stable iron chelates can be produced and iron can be supplied to crops. That is, aspartic acid-N-monoacetic acid, aspartic acid-N-monopropionic acid, aspartic acid-N, N-
Iron of compounds such as diacetic acid, glutamic acid-N, N-diacetic acid, iminodisuccinic acid, ethylenediamine-N, N'-disuccinic acid, propanediamine-N, N'-disuccinic acid, taurine diacetic acid, N-methyliminodiacetic acid The chelate has biodegradability, is rapidly decomposed even when released into the environment, and does not chelate heavy metals or the like in the environment. These biodegradable iron chelate compounds supply the iron required by the crop by being used directly on the leaves, fruits or seeds of agricultural and horticultural crops, or by being applied to the soil in which the crop is grown or its medium. Therefore, it is possible to prevent and reduce / prevent iron deficiency, and further improve the quality of crops at the same time.

Since some of these iron chelate compounds have one or two asymmetric carbon atoms, the iron chelate compound used may be a mixture of optically different organisms. As an iron chelate compound that is an optical foreign body,
(S) -Aspartic acid-N-monoacetic acid, (S) -Aspartic acid-N-monopropionic acid, (S) -Aspartic acid-N, N-diacetic acid, (S) -Glutamic acid-N,
N-diacetic acid, (S, S) -iminodisuccinic acid, (R,
S) -iminodisuccinic acid, (R, R) -iminodisuccinic acid, (S, S) -ethylenediamine-N, N′-disuccinic acid, (R, S) -ethylenediamine-N, N′-disuccinic acid, (R, R) -ethylenediamine-N, N'-disuccinic acid, (S, S) -propanediamine-N, N'-
Disuccinic acid, (R, S) -propanediamine-N, N '
-Disuccinic acid and (R, R) -propanediamine-
Included are iron chelate compounds of N, N'-disuccinic acid.

These biodegradable iron chelate compounds are extremely useful materials for iron supply in agriculture, and the iron supply method using this biodegradable iron chelate compound is environmentally friendly, and ethylenediaminetetraacetic acid iron and nitrilotriacetic acid are used. Is an alternative iron supply method.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The biodegradable iron chelate compound of the present invention is disclosed in JP-A-7-27.
It can be produced by the method described in Japanese Patent Publication No. 45-45. When these biodegradable iron chelate compounds are used as an iron supply material for crops, the iron chelate compounds are applied directly to the leaves, fruits or seeds of agricultural and horticultural crops, or to the soil or the medium in which the crops are cultivated. You can also do it. Further, these iron chelate compounds can be diluted with water and applied directly to the leaves, fruits or seeds of agricultural and horticultural crops, or can be applied to the soil in which the crops are cultivated or the medium thereof. Furthermore, it is usually used by applying it to any dosage form such as powder, wettable powder, liquid, oil, emulsion, spray, etc. using a suitable solid carrier, liquid carrier, emulsifying dispersant, etc. used for agricultural chemical formulations. You can also These iron chelate compounds are inorganic salts, inorganic fertilizers, and
Organic fertilizers, insecticides, herbicides, etc. may be contained or used in combination.

The method of supplying iron using the material of the present invention can be applied to a wide range of agricultural and horticultural crops. Specific examples of agricultural and horticultural crops include mandarin oranges, apples, pears, peaches, grapes, chestnuts, figs, apricots, plums, plums, loquats, pineapples and other fruit trees, cucumbers, melons, watermelons, squash and other cucurbitaceae, and peppers. , Tomatoes, solanaceous plants such as eggplant, fruit vegetables such as strawberries, straight roots such as sugar beet, radish, carrot, burdock, sweet potato, potato, nematodes such as taro, yam, konjak, lotus root, ginger, soybean, Legumes such as adzuki bean, pea, pea, broad bean, groundnut, rice, wheat, barley, rye, pigeon, oats, buckwheat, millet, millet, corn and other crops, other coffee, sunflower, rapeseed And so on. These crops are only examples to which the present invention can be applied, and the present invention is not limited to these crops.

The material for supplying iron to the crop of the present invention can be applied to various stages of crop growth. In application, the compound may be applied to the soil in which the crop grows, may be applied directly to the crop at the seedling stage, the flowering stage or the fruiting stage, or may be applied to the crop sequentially at one or more stages of development of the crop. You may apply. The amount used varies depending on the type of crop to be treated, the specific crop part or habitat applied, the stage of development of the crop, the method of application and other factors, but generally 0.001 to 100,00.
The range is 0 ppm, preferably 0.01 to 10,000 ppm.

[0011]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

Example 1 (Preparation of ethylenediamine-N, N-iron disuccinate iron chelate solution) A solution was obtained from 10 parts of ethylenediamine-N, N-iron disuccinate / ammonium complex and 90 parts of water.

Examples 2 to 4 Ethylenediamine-N, N-iron disuccinate of Example 1
The same procedure as in Example 1 was carried out except that the biodegradable iron chelate compound shown in Table 1 was used instead of the ammonium complex.
A 0% solution was obtained.

[0014]

[Table 1]

Example 5 (Preparation of Aspartic acid-N, N-iron diacetate chelate wettable powder) Aspartic acid-N, N-iron diacetate-sodium complex 1
A wettable powder was obtained by thoroughly mixing 0 parts, 2 parts of sodium alkylbenzenesulfonate and 88 parts of clay.

Examples 6 to 7 Treatment was carried out in the same manner as in Example 5 except that the biodegradable iron chelate compound of Table 2 was used in place of the aspartic acid-N, N-diacetic acid iron / sodium complex of Example 5. 10% wettable powder was obtained.

[0017]

[Table 2]

Test Example 1 and Comparative Example 1 (Spraying Effect Test on Lawn) Sandy loam soil was placed in an a / 5000 pot, and a chemical fertilizer (15
-15-15) 3 g was mixed with the surface layer of about 10 cm. Diameter 1
Korai grass cut out with a 0.5 cm hole cutter was planted and grown in a glass chamber. After growing for 3 months,
A 100-fold diluted solution of ethylenediamine-N, N-iron disuccinate chelate solution was divided into two portions and sprayed with 15 ml per pot. The untreated group was used as a comparative example for the test group which was not sprayed with the 100-fold diluted solution. The test is 5 for both treated and untreated areas
Conducted in a row. As a result, the treated plants had a darker leaf color than the untreated plants, and a difference in plant height was observed one month after the treatment. The difference in plant height is shown in Table 3.

[0019]

[Table 3]

Test Examples 2 to 7 As in Test Example 1, the biodegradable iron chelate compounds prepared in Examples 2 to 7 were used to test the spraying effect on lawns. The results are summarized in Table 4.

[0021]

[Table 4]

Test Example 8 and Comparative Example 2 (Spinach Hydroponics Test) Spinach (cultivar: Titan) seeded in sand, which had four true leaves grown, had eight holes of about 15 mm uniformly formed. It was transplanted to a styrofoam plate and cultivated for 45 days by the NFT method. The culture solution was used as a standard one having a concentration of 1/2 of the garden test formulation, and was supplied by a circulation system. Propanediamine-N, N′-iron iron disuccinate complex as iron 2
The group in which ppm was used as the treated group, and the group in which the ethylenediaminetetraacetic acid iron complex was used as iron at 2 ppm was compared as the control group. Cultivation is performed in a glass room, and the pH of the culture solution is 5.0.
It was prepared once every two days and renewed every week. After the test was carried out, the living weights of the above-ground part and the below-ground part were measured, and the results shown in Table 5 were obtained as an average value of 8 stations. Propanediamine-N, N '
It was confirmed that the sodium iron disuccinate complex could replace the ethylenediaminetetraacetic acid iron complex as an iron supplier for spinach.

[0023]

[Table 5]

Test Examples 9 to 11 In the same manner as in Test Example 8, the hydroponic culture test of spinach was conducted using the biodegradable iron chelate compounds prepared in Examples 2 to 4. Table 6 shows the results.

[0025]

[Table 6]

[0026]

EFFECTS OF THE INVENTION Since the iron chelate compound of the present invention has biodegradability, it does not remain in the environment after iron is absorbed by the crop, and it is also applied to the crop or soil to grow the crop. And can prevent or reduce physiological disorders caused by iron deficiency, which is extremely useful in industry.

Claims (3)

[Claims] 1. A material for supplying iron to crops, which comprises a biodegradable iron chelate compound as an active ingredient. 2. The biodegradable iron chelate compound is aspartic acid-N-monoacetic acid, aspartic acid-N-monopropionic acid, aspartic acid-N, N-diacetic acid, glutamic acid-N, N-diacetic acid, iminodisuccinic acid. Acid, ethylenediamine-N, N'-disuccinic acid, propanediamine-
N, N'-disuccinic acid, taurine-N, N-diacetic acid, N
-A material for supplying iron to crops according to claim 1, which is at least one selected from iron chelate compounds of methyliminodiacetic acid. 3. The biodegradable iron chelate compound is (S)-
Aspartic acid-N-monoacetic acid, (S) -aspartic acid-N-monopropionic acid, (S) -aspartic acid-
N, N-diacetic acid, (S) -glutamic acid-N, N-diacetic acid, (S, S) -iminodisuccinic acid, (R, S) -iminodisuccinic acid, (R, R) -iminodisuccinic acid, (S,
S) -ethylenediamine-N, N'-disuccinic acid,
(R, S) -ethylenediamine-N, N'-disuccinic acid, (R, R) -ethylenediamine-N, N'-disuccinic acid, (S, S) -propanediamine-N, N'-disuccinic acid, ( (R, S) -Propanediamine-N, N'-disuccinic acid, (R, R) -Propanediamine-N, N'-
The material for supplying iron according to claim 1, which is at least one selected from iron chelate compounds of disuccinic acid.