JP2002316907A - Agricultural and horticultural composition for inhibiting anthocyanin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an agricultural and horticultural composition for accelerating growth of a plant and simultaneously inhibiting anthocyanin and find out a method for protecting or reducing coloration of the plant. SOLUTION: This agricultural and horticultural composition for inhibiting anthocyanin contains phosphorous acid or its salt as an effective ingredient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an agricultural and horticultural composition which promotes plant growth and simultaneously suppresses anthocyan, and a method for preventing or reducing coloring of plants.

[0002]

2. Description of the Related Art Primroses such as rush, cabbage,
In lettuce, broccoli, cruciferous plants such as cabbage, clover, legumes such as alfalfa, Labiatae plants such as large leaves, and grasses such as lawns, etc.
Anthocyan, which expresses red pigment in leaves during the transition from autumn to winter, is synthesized, and exhibits a dark purple color in combination with the green color of chlorophyll, which significantly impairs the commercial value of crops and significantly enhances the beauty of golf course greens. It may be impaired, and until now, measures such as covering the area at night to prevent the cold, or using a coloring agent have been used.

[0003]

As a result of the inventor's intensive studies on the development of a drug and a treatment method corresponding to such a situation, phosphorous acid or a salt thereof reduces the expression and accumulation of anthocyan. It has been found that the present invention suppresses and prevents or reduces the coloring of plants, thereby completing the present invention.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides an agricultural and horticultural composition for suppressing anthocyans, which comprises phosphorous acid or a salt thereof as an active ingredient, and applying the composition to plants such as lawn to thereby color the plant. This is a method of preventing or reducing the number of times.

The phosphorous acid or a salt thereof according to the present invention is not particularly limited. For example, phosphorous acid and an alkali metal salt such as a potassium salt and a sodium salt, an alkaline earth salt such as a calcium salt and a magnesium salt thereof are used. It may be a metal salt, an ammonium salt or the like, preferably phosphorous acid or a potassium salt, a sodium salt, a calcium salt or an ammonium salt thereof, more preferably phosphorous acid or potassium phosphite.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The amount of phosphorous acid or a salt thereof, which is an active ingredient of the present invention, can be varied within a relatively wide range. And preferably 5 to 50% by mass.

[0007] The agricultural and horticultural composition of the present invention can be applied according to the usual method of applying fertilizer. For example, the agricultural and horticultural composition of the present invention can be used as it is or diluted with water, and applied to a plant or water surface, or applied to soil. When spraying using a tool or a machine, for example, a watering can, a power sprayer or a sprinkler can be used.

When the agricultural and horticultural composition of the present invention is diluted with water, the dilution rate of the spray liquid is usually 2 to 10,000 times, preferably 10 to 5000 times, more preferably 100-1000
It is twice. The amount of spray liquid, 1 m ^2, per, 10m
It is 1 to 10,000 ml, preferably 50 to 1000 ml, and more preferably 100 to 500 ml.

The agricultural and horticultural composition of the present invention can be used at all stages of plant growth, but is preferably applied from autumn to early winter. The number of applications is preferably 2 to 5 times.

[0010] The agricultural and horticultural composition of the present invention can also be used for many plants that produce anthocyan. Examples of such plants include, for example, rushes such as rush, cabbage, lettuce, broccoli, cruciferous plants such as cabbage, clover, legumes such as alfalfa, lamiaceae plants such as large leaves, and grasses such as lawns. No.

The agricultural and horticultural composition of the present invention can be used in combination with or mixed with other agricultural materials, for example, compost, pesticides, fertilizers, soil improving materials and the like. Further, the agricultural and horticultural composition of the present invention can contain an auxiliary agent such as a carrier and a surfactant which are usually used for agricultural chemicals.

Examples and test examples are shown below, but the present invention is not limited to these. All percentages and parts used below indicate percentages and parts by mass, unless otherwise specified.

[0013]

【Example】

[0014]

Example 1 Wettable powder containing phosphorous acid Phosphorous acid (25 parts), calcium ligninsulfonate (3 parts)
Parts), sodium lauryl sulfate (2 parts) and synthetic hydrous silicon oxide (remainder) were thoroughly pulverized and mixed to obtain a wettable powder containing 25% of an active ingredient.

[0015]

[Example 2] Phosphate-containing liquid agent Phosphorous acid (15 parts), potassium hydroxide (10 parts), ammonium hydroxide (5 parts) and water (remainder) are thoroughly mixed and dissolved, and the active ingredient is dissolved. Was obtained at a concentration of 15%.

[0016]

Example 3 Liquid preparation containing potassium phosphite Potassium phosphite (35 parts) was well mixed and dissolved in water (the rest) to obtain a liquid preparation containing 35% of an active ingredient.

[0017]

[Test Example 1] Anthocyan expression suppression test of cabbage The liquid preparation prepared according to Example 2 was diluted with water, and the amount of the active ingredient was calculated as phosphorous acid in the cabbage planted in the open field (1 strain, 5 strains, 3 repetitions). Then, it was sprayed so as to be 250 ppm, 500 ppm and 1000 ppm (at the time of planting cabbage). Further, 30 days and 60 days after cabbage planting, the same spraying was performed as described above (total of 3 sprayings), and the expression level of anthocyan was observed and observed 90 days after cabbage planting. The results are shown in Table 1. In addition, the expression degree of anthocyanin is represented by a symbol.
++.

[0018]

[Table 1] Results of anthocyan expression on cabbage ─────────────────────────────────── Test number Active ingredient Amount (ppm) Anthocyan expression 90 days after cabbage planting ─────────────────────────────────── 1 1000 − 2 500 − 3 250 + ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ 0 4 0 (No processing) +++ ─────────────────── ────────────────

[0019]

Test Example 2 Anthocyanin Expression Inhibition Test on Lawn Grassroot was planted in a 200 cm ² Wagner pot, and the pot was placed outdoors to grow the lawn.

The liquid preparation prepared according to Example 2 was diluted with water, and the amount of the active ingredient was calculated as phosphorous acid to be 7.2 g / m ² ,
20 days after planting and 80 g to reach 3.6 g / m ² and 1.8 g / m ²
Two days later, the pot was sprayed.

One year after planting, the rice plant was dug out of the pot, washed with water, cut into upright stems, brooms and roots, and the weight was examined. 100 days after planting, 15
0 days and 200 days later, the degree of anthocyan expression was observed and investigated. The results are shown in Tables 2 and 3. The degree of expression was represented by a symbol, and-was defined as no occurrence, and +++++ was defined as the occurrence of anthocyanin.

[0022]

[Table 2] Results of survey on dry weight of each organ of Chlamydomonas Dry matter weight (g) less than the average value in the non-fertilized plots Volume of plots 番号 Number (g / m ² ) Upright stalk Crested stem Root Total dry weight 物 1 7.2 16.27 ± 1.00 10.15 ± 1.15 5.80 ± 0.24 32.22 ± 1.88 2 3.6 15.30 ± 0.67 10.06 ± 0.92 5.19 ± 0.29 30.53 ± 1.84 3 1.8 9.53 ± 0.41 7.59 ± 1.18 3.78 ± 0.27 20.91 ± 0.80 ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ 4 0 (no treatment) 4.82 ± 0.42 1.97 ± 0.39 1.44 ± 0.22 8.23 ± 0.70 ──────────────────────────── ───────

[0023]

[Table 3] Results of anthocyanin expression in rice brackish バDegree of expression Amount of plot 番号 Number (g / m ² ) 100 days after planting 150 days after 200 days 200 ─────────────────────────── 1 7.2 − − ± 2 3.6 − − + 31.8 + ++ ++ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ 4 0 (no processing) ++++++++++++++ ────

[0024]

[Test Example 3] Anthocyan expression suppression test in lawn Anthocyan expression line bentgrass was planted in a 200 cm ² Wagner pot and the pot was placed outdoors to grow bentgrass.

[0025] A liquid preparation was prepared in accordance with Example 3 were diluted in water, sprayed amount of potassium phosphite is, 3.5 g / m ^2, an amount to be 7.0 g / m ² or 14.0 g / m ^2, planting After 30 days, the mixture was sprayed on the pot three times at 30-day intervals. Fertilization was carried out using a general liquid fertilizer, divided into six times at two-week intervals.

After 100 days (first survey) and 150 days (second survey) after planting, the expression level of anthocyan was examined with respect to the expression level and the anthocyan content. The results are shown in Tables 4 and 5.

The degree of expression is represented by a symbol, and-is given without coloring and +++++ is given when coloring with anthocyanin occurs frequently. The anthocyan content is 0.2 g of bentgrass fresh leaves ground in a mortar, washed in an extraction container with 20 ml of a 3% HCl aqueous solution, allowed to stand in a cool dark place for 24 hours, filtered through a No. 6 filter paper, and absorbance at 530 nm. Is measured, and cyanidin 3-
The anthocyan concentration of the sample was calculated from a calibration curve prepared using glucoside as a standard. The test was performed in three sections at each concentration, and the results were expressed as an average of the three sections.

[0028]

[Table 4] Anthocyan expression level (first survey) ─────────────────────────────────── No. Active ingredient amount Anthocyan expression level (g / m ² ) ─────────────────────── Expression level Anthocyan content (mg / 100 g fresh weight) ── ───────────────────────────────── 1 3.5 ± 19.35 2 7.0 ± 16.64 3 14.0 − 15.20 ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ 4 0 (unprocessed) ++ 32.59 ───────────────────────────── ──────

[0029]

[Table 5] Anthocyan expression level (second survey) ─────────────────────────────────── No. Active ingredient amount Anthocyan expression level (g / m ² ) ─────────────────────── Expression level Anthocyan content (mg / 100 g fresh weight) ── ───────────────────────────────── 1 3.5 ＋ 21.10 27.0 ＋ 23.34 3 14.0 ＋ 15.36 ─ ─ ─ ─ ─ 0 ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ 0 4 0 (no processing) ++++ 47.58 ───────────────────────────── ──────

[0030]

According to the present invention, the expression and accumulation of anthocyan are suppressed by applying an appropriate amount of the composition of the present invention prior to the time when anthocyan is normally expressed, such as in autumn, with respect to the expression and accumulation of anthocyan in plants. Coloring can be prevented or reduced. Thereby, a plant can be bred healthy and an aesthetic appearance can be maintained.

Claims (4)

[Claims] An agricultural and horticultural composition for suppressing anthocyanin, comprising phosphorous acid or a salt thereof as an active ingredient. 2. The agricultural and horticultural composition according to claim 1, wherein the phosphorous acid or a salt thereof is phosphorous acid or a potassium salt, a sodium salt, a calcium salt or an ammonium salt thereof. 3. The agricultural and horticultural composition according to claim 1, wherein the phosphorous acid or a salt thereof is phosphorous acid or potassium phosphite. 4. A method for preventing or reducing the coloration of lawn by applying the composition according to claim 1 to lawn.