JP2006042708A - Cultivation method for increasing yield or improving quality of green vegetables - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cultivation method more excellent in an effect of increasing a yield and an effect of improving quality of green vegetables than ever. <P>SOLUTION: This cultivation method comprises applying a compound (A) of a specified structure having a 10-22C hydrocarbon group to underground parts and/or aboveground parts of the green vegetables in an amount of 5-120g per 10 ares at least once on a growing stage 1 on which a growth rate of plant height is less than 40%. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for increasing the yield or improving the quality of leafy vegetables such as spinach, cabbage and chingensai.

  Promoting the growth of crops and increasing yields by increasing the yield per unit area are important issues in agricultural production. Normally, nutrient elements such as nitrogen, phosphorus and potassium, which are indispensable for plant growth, and trace metal elements, are mixed with the original fertilizer and supplementary fertilizer and supplied to plants. Generally, however, the concentration of nutrient elements in fertilizers However, there is a limit to the improvement of crop growth and yield, and the use of a large amount of fertilizer increases the amount of nutrient elements in the soil, resulting in a poor balance of absorption, causing plant growth stagnation, etc. However, problems such as failure to achieve the target increase in sales and quality such as sugar content (Brix. Value) and freshness (greenness) do not increase. Under such circumstances, various plant growth regulators are used in combination.

As plant growth regulators, for example, plant growth regulators represented by gibberellin, auxin, and the like are used for regulation of germination, rooting, elongation, flowering, fruit growth, and morphogenesis reaction. In addition, there is a technique for foliar spraying or fertilizing a liquid fertilizer containing a foliar spray agent using oligosaccharide (Patent Document 1), sugar, minerals, amino acids, seaweed extract or microbial fermentation extract. Are known. Patent Document 2 discloses that an alcohol having 30 carbon atoms is used as a plant growth promoter. Patent Document 3 discloses a plant vitality agent composed of a monohydric alcohol having 12 to 24 carbon atoms. Further, Patent Document 4 discloses a crop yield increasing agent comprising a specific compound such as a monohydric alcohol having 12 to 24 carbon atoms.
JP-A-9-322647 JP 55-40674 JP 2000-198703 A JP 2002-265305 A

  However, plant growth regulators represented by, for example, gibberellins and auxins are used as plant growth regulators to control germination, rooting, elongation, flowering, fruit growth, and morphogenesis. The action of these substances is multifaceted and complex and has limited applications. Moreover, although patent document 4 is said to be effective in the increase in the yield of agricultural products, it does not mention the optimal conditions according to the kind of agricultural products. Among these, leaf vegetables such as spinach, cabbage and chingensai are not mentioned as the optimum conditions for increasing the yield and improving the quality.

  The subject of this invention is providing the cultivation method which was excellent by the yield increase effect and quality improvement effect of leaf vegetables especially among agricultural products.

  The present invention relates to a compound (A) represented by the following general formula (1) in a growth stage 1 having a plant growth rate of less than 40% represented by the following formula (2): In a quantity of 5 to 120 g per 10 a) and applied to the underground part and / or the above-ground part at least once, and relates to a method for increasing leaf vegetable yield or improving quality. Note that “increased yield” means an increase in the yield of the part that is the intended use of leafy vegetables. “Improvement in quality” means that the components of the target part such as the edible portion are improved and the appearance (color, gloss, shape, etc.) is improved. Examples include an increase in the content of ascorbic acid in the inside and a reduction in the content of nitric acid in the leaves.

[Wherein R ¹ is a hydrocarbon group having 10 to 22 carbon atoms, R ² is a hydrogen atom, a hydroxyl group or a hydrocarbon group having 1 to 24 carbon atoms, and R ³ is a hydrogen atom or a hydrocarbon group having 1 to 24 carbon atoms. Represents. ]
Plant height growth rate (%) = [Plant height at the time of treatment (cm) / Plant height at the time of harvest (cm)] x 100 (2)

  According to the method for cultivating leafy vegetables of the present invention, a remarkable yield increase effect or quality improvement effect of leafy vegetables can be obtained safely.

<Compound (A)>
In the general formula (1), the hydrocarbon groups of R ¹ , R ² and R ³ may be either saturated or unsaturated, preferably saturated, and may be linear, branched or cyclic, A straight chain or a branched chain is preferred, and a straight chain is particularly preferred. The total carbon number of the hydrocarbon group may be an odd number or an even number, but an even number is preferable.

Also, the total number of carbon atoms of R ^1, R ^2, R ³ are all preferably 50 or less, more preferably 12 to 48, more preferably from 16 to 44.

In the general formula (1), the carbon number of R ¹ is preferably 14 to 22, more preferably 14 to 20, more preferably from 14 to 18. The compound represented by the general formula (1) preferably has a total carbon number of 12 to 48, more preferably 16 to 28, and particularly preferably 16 to 24. Further, those having a total carbon number of 12 to 24 and one hydroxyl group are preferred, and those having a total carbon number of 16 to 22 and one hydroxyl group are particularly preferred. Specific examples of the compound represented by the general formula (1) include the following.

(A1)
1-alkanol represented by CH ₃ (CH ₂ ) _o-1 OH (o is an integer of 12 to 24, preferably 16 to 24, more preferably 16 to 20). That is, as the compound represented by the general formula (1), a monohydric alcohol having 12 to 24 carbon atoms can be given. Specifically, 1-dodecanol, 1-tridecanol, 1-tetradecanol, 1-pentadecanol, 1-hexadecanol, 1-heptadecanol, 1-octadecanol, 1-nonadecanol, 1-icosanol 1-henicosanol, 1-docosanol, 1-tricosanol, 1-tetracosanol.

(A2)
2-alkanol represented by CH ₃ CH (OH) (CH ₂ ) _p-3 CH ₃ (p is an integer of 12 to 24, preferably 16 to 24, more preferably 16 to 20). Specifically, 2-dodecanol, 2-tridecanol, 2-tetradecanol, 2-pentadecanol, 2-hexadecanol, 2-heptadecanol, 2-octadecanol, 2-nonadecanol, 2-icosanol Etc.

(A3)
_{CH 2 = CH (CH 2)} q-2 OH (q is 12 to 24, preferably 16 to 24, more preferably an integer of 16 to 20) include terminally unsaturated alcohol represented by. Specific examples include 11-dodecene-1-ol, 12-tridecene-1-ol, 15-hexadecene-1-ol, and the like.

(A4)
Examples of other unsaturated long chain alcohols include oleyl alcohol, elaidyl alcohol, linoleyl alcohol, linoleyl alcohol, eleostearyl alcohol (α or β), ricinoyl alcohol, and the like.

(A5)
_{HOCH 2 CH (OH) (CH} 2) r-2 H (r is 12 to 24, preferably 16 to 24, more preferably an integer of 16 to 20) include 1,2-diol represented by. Specific examples include 1,2-dodecanediol, 1,2-tetradecanediol, 1,2-hexadecanediol, 1,2-octadecanediol, and the like.

  Of the above (A1) to (A5), (A1), (A2), (A4), (A5) are preferable, (A1), (A2), (A4) are more preferable, and (A1), (A4) ) Is more preferable, and (A1) is particularly preferable.

  Further, in the present invention, together with the compound (A), a surfactant (B) other than the compound (A) [hereinafter referred to as component (B)], chelating agent (C) [hereinafter referred to as component (C) It is preferable to apply at least one of fertilizer (D) [hereinafter referred to as component (D)]. In particular, it is preferable to use both the component (B) and the component (C). When fertilizer is required at the application time, it is preferable to use the components (B), (C) and (D) in combination with the compound (A), for example. Moreover, when a fertilizer is not required at the application time, it is preferable to use (B) and (C) component together, for example with a compound (A).

<(B) component>
As the component (B), the following surfactants are preferably used for the purpose of emulsifying, dispersing, solubilizing or promoting penetration of the compound (A).

  Nonionic surfactants include sorbitan fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene fatty acid ester, glycerin fatty acid ester, polyoxyalkylene glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyalkylene polyglycerin fatty acid ester, sorbitol Fatty acid ester, polyoxyalkylene sorbitol fatty acid ester, sucrose fatty acid ester, resin acid ester, polyoxyalkylene resin acid ester, polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, alkyl (poly) glycoside, polyoxyalkylene alkyl ( Poly) glycoside, alkyl alkanolamide, sugar fatty acid amide and the like. Here, examples of the sugar fatty acid amide include those having a structure in which a hydrophobic group is bonded to an saccharide or sugar alcohol, for example, a sugar fatty acid amide such as a fatty acid amide of glucose or fructose. Further, those having a structure in which a hydrophobic group is amide-bonded to a sugar or sugar alcohol having an amino group, for example, a sugar fatty acid amide such as a fatty acid amide of N-methylglucamine can be used. The nonionic surfactant is preferably at least one selected from ether group-containing nonionic surfactants and ester group-containing nonionic surfactants that do not contain nitrogen atoms. Specifically, polyoxyalkylene (particularly ethylene) sorbitan fatty acid ester, polyoxyalkylene (particularly ethylene) glycerin fatty acid ester, and sucrose fatty acid ester are preferred.

  Examples of the anionic surfactant include carboxylic acid-based surfactants, sulfonic acid-based surfactants, sulfate ester-based surfactants, and preferably one or more selected from carboxylic acid-based surfactants and phosphate ester-based surfactants. .

  Examples of the carboxylic acid-based surfactant include fatty acids having 6 to 30 carbon atoms or salts thereof, polyvalent carboxylates, polyoxyalkylene alkyl ether carboxylates, polyoxyalkylene alkylamide ether carboxylates, rosinates, Examples include dimer acid salts, polymer acid salts, tall oil fatty acid salts, and esterified starches. Of these, esterified starch is preferred.

  Examples of sulfonic acid surfactants include alkylbenzene sulfonates, alkyl sulfonates, alkyl naphthalene sulfonates, naphthalene sulfonates, diphenyl ether sulfonates, alkyl naphthalene sulfonic acid condensates, and naphthalene sulfonic acid condensations. Examples include physical salts.

  Examples of sulfate surfactants include alkyl sulfates, polyoxyalkylene alkyl sulfates, polyoxyalkylene alkyl phenyl ether sulfates, tristyrenated phenol sulfates, polyoxyalkylene distyrenated phenol sulfates. And alkyl polyglycoside sulfate.

Examples of the phosphate ester surfactant include alkyl phosphate ester salts, alkylphenyl phosphate ester salts, polyoxyalkylene alkyl phosphate ester salts, and polyoxyalkylene alkylphenyl phosphate ester salts.
Examples of the salt include metal salts (Na, K, Ca, Mg, Zn, etc.), ammonium salts, alkanolamine salts, aliphatic amine salts, and the like.

  Examples of amphoteric surfactants include amino acids, betaines, imidazolines, and amine oxides.

  Examples of the amino acid system include acyl amino acid salts, acyl sarcosine salts, acyloylmethylaminopropionates, alkylaminopropionates, acylamidoethylhydroxyethylmethylcarboxylates, and the like.

  Examples of the betaine type include alkyl dimethyl betaine, alkyl hydroxyethyl betaine, acylamidopropyl hydroxypropyl ammonia sulfobetaine, acylamidopropyl hydroxypropyl ammonia sulfobetaine, ricinoleic acid amidopropyl dimethylcarboxymethyl ammonia betaine, and the like.

  Examples of the imidazoline series include alkyl carboxymethyl hydroxyethyl imidazolinium betaine, alkyl ethoxy carboxymethyl imidazolium betaine, and the like.

  Examples of amine oxides include alkyldimethylamine oxide, alkyldiethanolamine oxide, alkylamidopropylamine oxide, and the like.

  The component (B) may be used alone or in combination of two or more. Moreover, when these (B) components contain a polyoxyalkylene group, Preferably it has a polyoxyethylene group, The average added mole number is 1-300, Preferably it is more than 5 and 100 or less. .

  In addition, the component (B) preferably has a glycine HLB of 10 or more, more preferably 12 or more.

  When a monohydric alcohol having 12 to 24 carbon atoms is used as the compound (A), the component (B) includes an ester group-containing nonionic surfactant and an ether group-containing nonionic surfactant that does not contain a nitrogen atom. One or more selected from agents, amphoteric surfactants, carboxylic acid anionic surfactants and phosphoric acid anionic surfactants are preferred. In particular, at least one selected from an ester group-containing nonionic surfactant, an ether group-containing nonionic surfactant not containing a nitrogen atom, and an esterified starch is preferable. That is, the treatment liquid used in the present invention includes a monohydric alcohol having 12 to 24 carbon atoms, an ester group-containing nonionic surfactant, an ether group-containing nonionic surfactant containing no nitrogen atom, and an amphoteric surfactant. And those containing one or more surfactants selected from carboxylic acid anionic surfactants and phosphoric acid anionic surfactants.

<(C) component>
When an organic acid having the following chelating ability or a salt thereof is used in combination as the component (C), the yield increase effect of the crop is further improved. Specifically, citric acid, gluconic acid, malic acid, heptonic acid, oxalic acid, malonic acid, lactic acid, tartaric acid, succinic acid, fumaric acid, maleic acid, adipic acid, glutaric acid and other oxycarboxylic acids, polyvalent carboxylic acids And potassium salts, sodium salts, alkanolamine salts, aliphatic amine salts and the like thereof. In addition, crop yields can be improved by mixing chelating agents other than organic acids. Examples of the chelating agent to be mixed include aminocarboxylic acid chelating agents such as EDTA, NTA, and CDTA.

<(D) component>
As the component (D), specifically, N, P, K, Ca, Mg, S, B, Fe, Mn, Cu, Zn, Mo, Cl, Si, Na, etc., particularly N, P, Examples include inorganic substances and organic substances that serve as a supply source of K, Ca, and Mg. Examples of such inorganic substances include ammonium nitrate, potassium nitrate, ammonium sulfate, ammonium chloride, ammonium phosphate, sodium nitrate, urea, ammonium carbonate, potassium phosphate, superphosphate lime, and molten phosphorus fertilizer (3MgO · CaO · P ₂ O ₅ · 3CaSiO _2), potassium sulfate, salts potassium nitrate of lime, slaked lime, lime carbonate, magnesium sulfate, magnesium hydroxide, magnesium carbonate, and the like. Organic substances include chicken dung, beef dung, bark compost, amino acids, peptone, Mieki, fermented extract, calcium salts of organic acids (citric acid, gluconic acid, succinic acid, etc.), fatty acids (formic acid, acetic acid, propionic acid, And calcium salts of caprylic acid, capric acid, caproic acid and the like. These fertilizer components can also be used in combination with a surfactant. It is not necessary to add the fertilizer component when the fertilizer component is sufficiently applied as the original fertilizer in the soil, such as in the field cultivation of leafy vegetables. Moreover, it is preferable to mix | blend a fertilizer component with the type of cultivation form which avoids excessive application of original fertilizer and gives a fertilizer component in the same way as irrigation like a hydroponics and hydroponics.

In the present invention, the compound (A) is added in an amount of 5 to 120 g per 10a in the growth stage 1 in which the plant height growth rate represented by the following formula (2) is less than 40%, and the ground part of leafy vegetables and / or the ground. Apply at least once to the part.
Plant height growth rate (%) = [Plant height at the time of treatment (cm) / Plant height at the time of harvest (cm)] x 100 (2)
Here, the plant growth rate is the length from the ground (squeezed length) in the case of non-headed leafy vegetables such as spinach, where the leaves are lively and the longest vigorous leaves that are not yellowed stand upright. Measure and calculate. In the case of head and leaf vegetables such as cabbage, the length (drawing length) from the ground when the longest vigorous, non-yellowing, vigorous, non-yellowing leaves are erected vertically. Measure and calculate. The plant height at the time of harvest is the plant height planned for harvesting the leafy vegetables.

  The plant growth rate at the growth stage 1 is preferably 5 to 20%, more preferably 10 to 18%. Further, the application amount of the compound (A) in the growth stage 1 is preferably 10 to 100 g per 10 a, and more preferably 20 to 80.

  In the present invention, the compound (A) is further added at least to the underground part and / or the above-ground part in an amount of 10 to 140 g per 10a in the growth stage 2 in which the plant growth rate is 40% or more and less than 60%. It is preferable to apply it once. The plant growth rate at the growth stage 2 is preferably 43 to 57%, more preferably 45 to 55%. Moreover, the application amount of the compound (A) in the growth stage 2 is preferably 20 to 120 g, more preferably 30 to 100 g per 10a.

  In the present invention, the compound (A) is further added to the underground part and / or the above-ground part in an amount of 120 to 900 g per 10a in the growth stage 3 in which the plant growth rate is 60% or more and less than 80%. It is preferable to apply it once. The plant growth rate at the growth stage 3 is preferably 63 to 77%, more preferably 65 to 75%. Moreover, the application amount of the compound (A) in the growth stage 3 is preferably 120 to 600 g, more preferably 120 to 400 g per 10a.

  In the present invention, the compound (A) is further added to the underground part and / or the above-ground part in an amount of 120 to 1200 g per 10a in the growth stage 4 where the plant growth rate is 80% or more and 100% or less. It is preferable to apply it once. The plant growth rate at the growth stage 4 is preferably 83 to 97%, more preferably 85 to 95%. Moreover, the application amount of the compound (A) in the growth stage 4 is preferably 120 to 900 g, more preferably 120 to 600 g per 10a.

  The application of the compound (A) at the growth stages 2 to 4 can be carried out at any one of these stages, at any two stages, or at all three stages. It is more preferable to carry out in 4 stages including the growth stage 1). In each stage, the compound (A) can be applied multiple times.

  In the present invention, the application of the compound (A) to the leafy vegetables at the growth stages 1 to 4 is a method of foliar application or soil irrigation using a treatment liquid containing the compound (A) (hereinafter referred to as treatment liquid). The compound (A) can be directly applied as a granule.

  In the case of using the treatment liquid, various means can be used as the supply method to the leafy vegetables. For example, the treatment liquid can be sprayed directly on plants such as leaves and stems, or it can be injected into the soil or diluted with hydroponic liquid or feed water that is in contact with the root, such as hydroponics or rock wool. The method of supplying is mentioned. As a method for supplying the treatment liquid, an appropriate method may be selected depending on the type of leaf vegetables and the application time.

  In the case of foliar spraying, the concentration of the compound (A) in the treatment liquid is preferably 1 to 50,000 ppm, more preferably 5 to 10,000 ppm, and particularly preferably 10 to 4,000 ppm. It is preferable to adjust the concentration of the compound (A) in the treatment liquid so that the application amount of A) is obtained.

  In the case of soil irrigation, the concentration of the compound (A) in the treatment liquid is preferably 0.1 to 5,000 ppm, more preferably 0.5 to 1,000 ppm, and particularly preferably 1 to 400 ppm. It is preferable to adjust the concentration of the compound (A) in the treatment liquid so as to obtain a preferable application amount of the compound (A).

  In the present invention, when the components (B) to (D) are used in combination, the ratio of each component is 1 to 10,000 parts by weight of the component (B) and further 10 to 5 parts per 100 parts by weight of the compound (A). 1,000 parts by weight, further 50 to 1,500 parts by weight, particularly 100 to 300 parts by weight, (C) component 0 to 10,000 parts by weight, further 0.1 to 1,000 parts by weight, and further 5 to 200 parts by weight. Parts by weight, especially 10 to 100 parts by weight, component (D) 0 to 1,000,000 parts by weight, further 0 to 100,000 parts by weight, even more 10 to 100,000 parts by weight, especially 200 to 20,000 parts by weight. Part is preferred. Among the components (D), N is 1 to 10,000 parts by weight, further 10 to 5,000 parts by weight, further 50 to 1,000 parts by weight, particularly 100 to 600 parts by weight, and P is 1 to 5,000 parts. Parts by weight, further 5 to 2,500 parts by weight, more preferably 25 to 500 parts by weight, especially 50 to 300 parts by weight, K is 1 to 10,000 parts by weight, further 10 to 5,000 parts by weight, and further 50 to 50 parts by weight. 1,000 parts by weight, particularly 100 to 600 parts by weight are preferred.

  In the present invention, 0 to 5,000 parts by weight, particularly 10 to 500 parts by weight of other nutrient sources (saccharides, amino acids, vitamins, etc.) can be used with respect to 100 parts by weight of compound (A). .

  The above-mentioned components (B) to (D) and other nutrient sources can be appropriately blended and applied in the treatment liquid, or can be applied as it is, or can be applied in a combined form. .

  The leafy vegetables that are the subject of the present invention include spinach, cabbage, chin-gensai, Chinese cabbage, komatsuna, nabana, mizuna, mibuna, hiroshimana, takana, bekana, early rape, canumana, nozawana, shintsumina, yellow pepper, bush kanna, shinobuna, nihonkoma , Osakina, Taisai, Osaka Shirona, Sugkina, Yamaciona, Nagasaki Chinese cabbage, Taasai, Tsurumurasaki, Cauliflower, Broccoli, Mekabetsu, Onion, Green onion (specifically, deep-rooted onion, leaf onion, bamboo shoot, chives, hydroponic onion, etc.), garlic , Sea bream, leek, asparagus, lettuce, saladana, celery, sengiku, parsley, honey bee, seri, udo, myoga, fuki, hamafou, perilla, tsumamina, tade, watercress, taranoki, bracken, etc.Of these, spinach is preferable. Refer to “Vegetable cultivation technology” (April 5, 1996, published by Seikodo Shinkosha Co., Ltd.) for the classification of these leaf vegetables.

  Table 1 shows the treatment agents used in the following examples, and Table 2 shows the growth stage pattern to which the treatment agents are applied and the application amounts of the respective components.

  In Table 1, treatment agent 1 is obtained by pulverizing compound (A) with a mixer, treatment agent 2 is a liquid obtained by emulsifying compound (A) in water with component (B), and treatment agent 3 is treated with treatment agent 2. Furthermore, what mixed the chelating agent and the fertilizer and the processing agent 4 are what mixed (B) component and water (aqueous solution). The treating agent 5 uses the liquid compound (A) as it is.

  In Table 2, the measurement of the plant height that determines the growth stage is as described above.

Example 1: Effect on spinach (autumn maki) Using an autumn maki spinach (variety Allai), a yield increase and quality improvement effect test was performed under the following processing conditions. In outdoor cultivation, sowing at the beginning of November, fertilizer amount is 10% of the original fertilizer N: P: K = 20kg: 20kg: 20kg, additional fertilizer (fertilizer components different from those in treatment agent No. 3, the same applies hereinafter) Did not. In the treatment, each treatment agent was diluted with tap water, and soil irrigation was performed at a water amount of 3 t per 10a. In addition, processing agent No. No. 1 maintained the dispersed state while stirring the finely pulverized product. No. 5 was used for soil irrigation while maintaining a dispersed state while stirring the liquid (the same applies hereinafter). The yield and quality (leaf nitric acid content, leaf ascorbic acid content) harvested in early March are shown in Table 3. The yield and quality were evaluated by relative values when the untreated section (treatment pattern No. 9) was 100 (the same applies hereinafter). As a result, the treatment method of the example showed an improvement in quality with respect to the comparative example, in which the yield was increased, the content of ascorbic acid was increased and the content of nitric acid was decreased.

Example 2: Effect on spinach (summer firewood) Using a summer firefly spinach (variety active), a yield increase and quality improvement effect test was performed under the following processing conditions. In the open field cultivation, seeding was carried out at the beginning of July, and the amount of fertilizer was N: P: K = 15 kg: 20 kg: 15 kg per 10a of the original fertilizer, and no additional fertilization was performed. In the treatment, each treatment agent was diluted with tap water, and soil irrigation was performed at a water amount of 3 t per 10a. Table 4 shows the yield and quality (leaf nitrate content and leaf ascorbic acid content) harvested in late August. As a result, the treatment method of the example showed an improvement in quality, as compared with the comparative example, the yield increased, the ascorbic acid content increased and the nitric acid content decreased.

Example 3: Effect on cabbage (autumn maki) Using a cabbage (variety gold type 201), a yield increase and quality improvement effect test was performed under the following processing conditions. The seedlings sown and raised in early September were planted in mid-November in open field cultivation. The amount of fertilizer applied was N: P: K = 20 kg: 20 kg: 20 kg per 10a, and additional fertilization was performed at the end of December and the end of January, respectively with N: P: K = 5 kg: 0 kg: 5 kg. In the treatment, each treatment agent was diluted with tap water, and soil irrigation was performed at a water amount of 3 t per 10a. The yield and quality (leaf nitric acid content, leaf ascorbic acid content) harvested in late March are shown in Table 5. As a result, the treatment method of the example showed an improvement in quality with respect to the comparative example, in which the yield was increased, the content of ascorbic acid was increased and the content of nitric acid was decreased.

Example 4: Effect on Chingensai (Spring Maki) A yielding and quality improvement effect test was carried out under the following processing conditions using Chingensai (variety Seitei Chingensai). In outdoor cultivation, seeding was conducted in early April, and the amount of fertilizer applied was N: P: K = 20 kg: 20 kg: 20 kg per 10a of the original fertilizer, and no additional fertilization was performed. In the treatment, each treatment agent was diluted with tap water, and soil irrigation was performed at a water amount of 3 t per 10a. The yield and quality (leaf nitric acid content, leaf ascorbic acid content) harvested in late May are shown in Table 6. As a result, the treatment method of the example showed an improvement in quality with respect to the comparative example, in which the yield was increased, the content of ascorbic acid was increased and the content of nitric acid was decreased.

Claims (7)

The compound (A) represented by the following general formula (1) is submerged in an amount of 5 to 120 g per 10 ares in the growth stage 1 in which the plant height growth rate represented by the following formula (2) is less than 40%. A method for increasing the yield of leafy vegetables or improving the quality thereof, which is applied at least once to the part and / or the ground part.

Wherein, R ¹ represents a hydrocarbon group having 10 to 22 carbon atoms, R ² is a hydrogen atom, a hydrocarbon group of a hydroxyl group or 1 to 24 carbon atoms, R ³ is a hydrogen atom or a hydrocarbon group having 1 to 24 carbon atoms Represents. ]
Plant height growth rate (%) = [Plant height at the time of treatment (cm) / Plant height at the time of harvest (cm)] x 100 (2) Further, the compound (A) represented by the general formula (1) is added in an amount of 10 to 140 g per 10 ares in the growth stage 2 in which the plant growth rate is 40% or more and less than 60%. Or, the method for increasing the yield or quality of cultivation of leafy vegetables according to claim 1, wherein the method is applied at least once to the above-ground part. Furthermore, the compound (A) represented by the general formula (1) is added in an amount of 120 to 900 g per 10 ares in the growth stage 3 in which the plant growth rate is 60% or more and less than 80%. Alternatively, the method for increasing yield or improving the quality of leafy vegetables according to claim 1 or 2 applied at least once to the above-ground part. Further, the compound (A) represented by the general formula (1) is added in an amount of 120 to 1200 g per 10 ares in the growth stage 4 in which the plant height growth rate is 80% or more and 100% or less, and / or Or the yield increase or quality improvement cultivation method of the leaf vegetables in any one of Claims 1-3 applied to at least 1 time with respect to an above-ground part. Furthermore, increase in the yield of leafy vegetables according to any one of claims 1 to 4, wherein at least one selected from a surfactant (B) other than the compound (A), a chelating agent (C) and a fertilizer (D) is applied. Quality improvement cultivation method. 6. The method for increasing the yield or quality of cultivation of leafy vegetables according to any one of claims 1 to 5, wherein the leafy vegetables are spinach. Compound (A), the general formula (1) R ^2, R ³ are leaf vegetables sales or quality improvement cultivation method of each according to any one of claims 1 to 6 which is a compound of hydrogen atoms in the.