Liquid fertilizer containing glutamic acid, methionine and calcium and method for producing same

Abstract

To provide a liquid fertilizer containing glutamate, methionine, and calcium as fertilizing components, a cultivating method of crops using the same, and a stabilizing method and a production method of the same.SOLUTION: A liquid fertilizer contains 1.0-5.0 wt.% of glutamate, 1.0-5.0 wt.% of methionine, and 0.3-11 wt.% of calcium, where the content ratio of the calcium and the glutamate is 11:1-1:3 in weight and the content ratio of the calcium and the methionine is 11:1-1:3 in weight.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a liquid fertilizer containing glutamic acid, methionine and calcium, a method for cultivating crops using the same, and a method for stabilizing and producing the same. [Background technology]

[0002] Conventionally, liquid fertilizers have been mainly used as top dressing because the fertilizer components are dissolved in water and show rapid fertilizing effects. Liquid fertilizers are generally applied by diluting the liquid fertilizer with water 10 to 3000 times and spraying the diluted solution on the leaves of crops, spraying the soil surface where crops are grown, or irrigating the soil. Among them, so-called organic liquid fertilizers, which contain organic components such as amino acids such as glutamic acid and methionine as fertilizer components, are known to have mild effects and to improve crop quality, and are widely used. For example, a liquid fertilizer containing methionine and water and having a pH of 11 or higher is known as a conventional organic liquid fertilizer (see Patent Document 1). Furthermore, calcium is used as a fertilizer component necessary for crop growth, since calcium deficiency symptoms are likely to occur during crop cultivation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-159516 A Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, in liquid fertilizers, insoluble substances may be generated from the solution during storage. Liquid fertilizers are often applied using irrigation tubes, and the generation of such insoluble substances can cause clogging of the irrigation tubes and the watering holes of the spray nozzle during application, so there has been a demand for organic liquid fertilizers that do not have the problem of insoluble substance generation. The present invention has been made in consideration of the above circumstances, and the objective of the present invention is to provide a liquid fertilizer containing glutamic acid, methionine, and calcium as fertilizer components, a method for cultivating crops using the same, and a method for stabilizing and producing the same. [Means for solving the problem]

[0005] The present invention is based on the fact that in a liquid fertilizer containing glutamic acid, methionine and calcium as fertilizer components, the glutamic acid content is 1.0 to 5.0 wt%, the methionine content is 1.0 to 5.0 wt%, the calcium content is 0.3 to 11 wt%, and the calcium to glutamic acid content ratio and the calcium to methionine content ratio are each specific weight ratios, thereby suppressing the generation of insoluble substances from the solution. That is, the present invention is as follows. [1] A liquid fertilizer containing 1.0 to 5.0% by weight of glutamic acid, 1.0 to 5.0% by weight of methionine, and 0.3 to 11% by weight of calcium, wherein the ratio of the calcium content to the glutamic acid content is 11:1 to 1:3 by weight, and the ratio of the calcium content to the methionine content is 11:1 to 1:3 by weight. [2] A liquid fertilizer according to [1], further comprising magnesium. [3] A liquid fertilizer according to [1] or [2], further comprising potassium and at least one component selected from the group consisting of boron, manganese, iron, copper, zinc, sulfur, chlorine and molybdenum. [4] A method for cultivating crops, comprising a step of applying the liquid fertilizer described in any one of [1] to [3] to crops. [5] A method for stabilizing a liquid fertilizer described in any one of [1] to [3], comprising a step of mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3, and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:3. [6] A method for producing a liquid fertilizer described in any one of [1] to [3], comprising a step of mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3, and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:3. Effect of the Invention

[0006] According to the present invention, it is possible to provide a liquid fertilizer containing glutamic acid, methionine and calcium, which is free from problems caused by the generation of insoluble substances from the solution. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The liquid fertilizer of the present invention (hereinafter referred to as the liquid fertilizer of the present invention) contains glutamic acid. The content of glutamic acid in the liquid fertilizer of the present invention is in the range of 1.0 to 5.0% by weight, preferably 1 to 4.6% by weight. In the present invention, L-glutamic acid is preferred as glutamic acid.

[0008] The liquid fertilizer of the present invention contains methionine. The methionine content in the liquid fertilizer of the present invention is in the range of 1.0 to 5.0% by weight, preferably 1.0 to 3.0% by weight. In the present invention, DL-methionine is preferred as methionine.

[0009] The liquid fertilizer of the present invention contains calcium. The calcium content in the liquid fertilizer of the present invention is in the range of 0.3 to 11% by weight, preferably 3 to 8% by weight, and more preferably 5 to 8% by weight.

[0010] The liquid fertilizer of the present invention may contain magnesium. The magnesium content in the liquid fertilizer of the present invention is preferably in the range of 0.5 to 4% by weight, more preferably 1 to 2% by weight.

[0011] The liquid fertilizer of the present invention may contain an amino acid other than glutamic acid and methionine (hereinafter referred to as amino acid I). An example of such an amino acid is aspartic acid. When the liquid fertilizer of the present invention contains amino acid I, the total content thereof in the liquid fertilizer of the present invention is preferably in the range of 1.0 to 5.0% by weight, more preferably 2.0 to 4.0% by weight.

[0012] The liquid fertilizer of the present invention may contain nitrogen components other than glutamic acid and methionine as fertilizer components. When the liquid fertilizer of the present invention contains glutamic acid, methionine and amino acid I, it may contain nitrogen components other than glutamic acid, methionine and amino acid I. Examples of such nitrogen components include ammonium nitrate, ammonium magnesium nitrate, ammonium chloride, ammonium sulfate, ammonium sodium nitrate, calcium nitrate, ammonium lime and potassium nitrate. The total content of the nitrogen components in the liquid fertilizer of the present invention is preferably in the range of 1.0 to 15.0% by weight, more preferably 4.0 to 10.0% by weight. In the present invention, the amount of the nitrogen components is the weight converted into N (nitrogen atom).

[0013] Furthermore, the liquid fertilizer of the present invention may contain potassium as a fertilizer component. When the liquid fertilizer of the present invention contains potassium, the total content thereof is preferably in the range of 0.8 to 8.0% by weight, more preferably 1.5 to 5.0% by weight.

[0014] The liquid fertilizer of the present invention may further contain at least one component selected from the group consisting of boron, manganese, iron, copper, zinc, sulfur, chlorine and molybdenum (hereinafter referred to as the component of the present invention). When the liquid fertilizer of the present invention contains the component of the present invention, the total content thereof is preferably in the range of 0.05 to 1.0% by weight, more preferably 0.1 to 0.7% by weight.

[0015] The liquid fertilizer of the present invention contains water. The water content in the liquid fertilizer of the present invention is in the range of 20.0 to 97.5% by weight, preferably 30.0 to 80.0% by weight. The water contained in the liquid fertilizer of the present invention is not particularly limited, and may contain water contained in ordinary liquid fertilizers, such as tap water, well water, and deionized water.

[0016] The liquid fertilizer of the present invention preferably has a pH in the range of 1.0 to 3.0 at 25°C. The pH of the liquid fertilizer of the present invention is a pH value measured when the liquid temperature of the liquid fertilizer of the present invention is adjusted to 25°C using a thermostatic bath or the like as necessary, the glass electrode of a glass electrode type pH meter is immersed in the original liquid of the liquid fertilizer of the present invention, and the indicated value of the pH meter becomes stable. More specifically, about 100 mL of the liquid fertilizer of the present invention whose liquid temperature has been adjusted to 25°C is dispensed into a beaker, and the glass electrode of the glass electrode type pH meter is fixed in a state in which it is immersed in the liquid by about 3 cm from the tip of the glass electrode, and the glass electrode is left to stand for about 5 minutes, and the indicated value of the pH meter is confirmed to be stable, and then the value is recorded. For example, a glass electrode type pH meter manufactured by Horiba, Ltd. can be used to measure pH.

[0017] In order to obtain the liquid fertilizer of the present invention having a pH in the range of 1.0 to 3.0 at 25°C, an acid component is usually added in an amount necessary to achieve the pH in the range of 1.0 to 3.0. In the present invention, it is preferable to use nitric acid as such an acid component. The content of nitric acid in the liquid fertilizer of the present invention is usually in the range of 4.0 to 10.0% by weight, preferably 4.0 to 8.0% by weight, in terms of N (nitrogen atom).

[0018] The liquid fertilizer of the present invention has a ratio by weight of the calcium content to the glutamic acid content in the range of 11:1 to 1:3, preferably in the range of 5:1 to 1:2, and more preferably in the range of 3:1 to 1:1. Furthermore, the liquid fertilizer of the present invention has a ratio by weight of the calcium content to the methionine content in the range of 11:1 to 1:3, preferably in the range of 5:1 to 1:2, and more preferably in the range of 5:1 to 1:1.

[0019] The liquid fertilizer of the present invention can be produced by mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3, and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:3.

[0020] An example of the method for producing the liquid fertilizer of the present invention (hereinafter, referred to as the present production method) is described below. A calcium compound and, if necessary, a magnesium compound are added to water, and an acid component is added thereto, and mixed until dissolved and transparent. After the temperature of the solution is lowered to about 40°C, glutamic acid, methionine, and, if necessary, amino acid I are added so that the ratio of the calcium content to glutamic acid contained in the calcium compound is in the range of 11:1 to 1:3 by weight, and the ratio of the calcium content to methionine contained in the calcium compound is in the range of 11:1 to 1:3 by weight, and mixed until dissolved and transparent. Potassium is added as necessary to adjust the pH of the solution to a range of 1.5 to 2.0. By adjusting the pH of the solution to a range of 1.5 to 2.0, the increase in pH during storage can be suppressed to 3.0 or less. If necessary, other components (potassium, the components of the present invention, etc.) are dissolved, and an acid component and / or a basic component are added to adjust the pH of the solution to a range of 1.7 to 2.1. Usually, the liquid fertilizer of the present invention can be obtained by adding and mixing an amount of water necessary to adjust the amount of each component contained.

[0021] Furthermore, by mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3 and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:3, the generation of insoluble substances during production and storage can be suppressed and the liquid fertilizer of the present invention can be stabilized. When storing the liquid fertilizer of the present invention, it is preferable to avoid storing it under direct sunlight and store it indoors at -10°C to 40°C.

[0022] An example of the method for stabilizing liquid fertilizer of the present invention (hereinafter referred to as the present stabilization method) is described below. A calcium compound and, if necessary, a magnesium compound are added to water, and an acid component is added thereto, and mixed until they are dissolved and become transparent. After the temperature of the solution is lowered to about 40°C, glutamic acid, methionine, and, if necessary, amino acid I are added so that the ratio of the calcium content to glutamic acid contained in the calcium compound is in the range of 11:1 to 1:3 by weight, and the ratio of the calcium content to methionine contained in the calcium compound is in the range of 11:1 to 1:3 by weight, and mixed until they are dissolved and become transparent. Potassium is added as necessary to adjust the pH of the solution to a range of 1.5 to 2.0. By adjusting the pH of the solution to a range of 1.5 to 2.0, it is possible to suppress the increase in pH during storage to 3.0 or less. If necessary, other components (potassium and the components of the present invention, etc.) are dissolved, and an acid component and / or a basic component are added to adjust the pH of the solution to a range of 1.7 to 2.1. Usually, the liquid fertilizer of the present invention can be stabilized by adding and mixing an amount of water necessary to adjust the amount of each component contained.

[0023] In the present production method and the present stabilization method, it is preferable to use L-glutamic acid as glutamic acid. In the present invention, for example, commercially available glutamic acid can be used.

[0024] In the present production method and the present stabilization method, it is preferable to use DL-methionine as the methionine. DL-methionine is commercially available as a feed additive, and an example of commercially available DL-methionine is DL-methionine manufactured by Sumitomo Chemical Co., Ltd.

[0025] In the present production method and the present stabilization method, examples of the calcium compound include quicklime, slaked lime and calcium carbonate. In the present invention, commercially available calcium carbonate can be used.

[0026] In the present production method and stabilization method, magnesium can be contained in the liquid fertilizer of the present invention by using a magnesium compound. Examples of magnesium compounds include magnesium hydroxide, magnesium sulfate, magnesium acetate, and magnesium carbonate. In the present invention, commercially available magnesium hydroxide can be used.

[0027] In the present production method and stabilization method, the liquid fertilizer of the present invention can contain amino acid I by using amino acid I. In the present production method and stabilization method, from the viewpoint of suppressing crystal precipitation of amino acid I, it is preferable to use amino acid I that has been purified so that its content is 95% by weight or more.

[0028] In the present production method and stabilization method, potassium can be contained in the liquid fertilizer of the present invention by using a potassium compound, such as potassium chloride, potassium sulfate, potassium soda sulfate, potassium sulfate, potassium bicarbonate, and potassium nitrate.

[0029] In the present production method and stabilization method, the component of the present invention can be contained in the liquid fertilizer of the present invention by using a compound containing the component of the present invention. Examples of the compound containing the component of the present invention include oxides, hydroxides, chlorides, carbonates, ammonium salts, nitrates, sulfates, hydrochlorides, and acetates containing the component of the present invention.

[0030] The liquid fertilizer of the present invention can be used in the same manner as a general application method of liquid fertilizer. Examples of application methods include a method of diluting the liquid fertilizer of the present invention with water 10 to 3000 times and spraying the diluted solution obtained on the soil where the crop is grown or on the leaf surface of the crop, and a method of immersing the roots or root ball of the crop in the diluted solution. The liquid fertilizer of the present invention can also be sprayed directly on the soil. After applying the liquid fertilizer of the present invention, the crop is cultivated under normal cultivation conditions to achieve good cultivation. Examples of crops include fruit vegetables such as tomatoes, cucumbers, eggplants, and peppers, fruit trees such as citrus fruits, apples, pears, persimmons, and grapes, leaf vegetables such as cabbage, Chinese cabbage, lettuce, and spinach, and flowering plants such as roses, lilies, carnations, and chrysanthemums. Specifically, the liquid fertilizer of the present invention can be applied by diluting the liquid fertilizer of the present invention with water 10 to 3000 times and applying the diluted solution to the culture soil or hydroponic solution in the elevated cultivation of strawberries, tomatoes, lettuce, onions, etc., or in the hydroponic or isolated cultivation of rice or field crops. The roots of the seedlings may be immersed in the diluted solution and then planted in the field. In the cultivation of rice, the liquid fertilizer of the present invention may be poured into the paddy field as a basal fertilizer, top dressing, or panicle fertilizer. In this case, the amount of fertilizer to be applied per 10 ares of paddy field is 5 to 100 kg of the liquid fertilizer of the present invention. EXAMPLES

[0031] The present invention will now be described in detail with reference to the following production examples.

[0032] Manufacturing Example 1 6.4 g of magnesium hydroxide and 32.8 g of calcium carbonate were added to 50 g of water. 88 g of 67.5% aqueous nitric acid solution was added and dissolved sufficiently until the liquid became transparent. 8.4 g of glutamic acid was added and dissolved, and then 4.4 g of methionine (feed additive DL-methionine, manufactured by Sumitomo Chemical Co., Ltd.) was added and dissolved sufficiently until the liquid became transparent. Next, 4 g of potassium hydroxide was added and dissolved. The solution was sampled and left to stand until the liquid temperature dropped to 25°C, and the pH was measured, which was 1.95. Furthermore, 1.66 g of potassium chloride, 0.36 g of manganese chloride, and 0.46 g of sodium tetraborate pentahydrate (Na2 B 4 O 7 5H 2 After adding and dissolving, 0.16 g of ethylenediaminetetraacetate zinc disodium salt and 0.3 g of ethylenediaminetetraacetate copper disodium salt were added, and further 0.48 g of ethylenediaminetetraacetate iron sodium salt and 0.004 g of ammonium molybdate were added in this order. Thereafter, the pH of the solution was adjusted with nitric acid and potassium hydroxide, and water was added and mixed so that the final weight was 200 g, thereby obtaining liquid fertilizer 1 of the present invention. The composition is shown in Table 1 (note that the numerical values ​​in the table indicate weight %). The ratio of the calcium content to glutamic acid content in liquid fertilizer 1 of the present invention was 1.6:1 by weight, and the ratio of the calcium content to methionine content was 3.0:1 by weight. The pH of liquid fertilizer 1 of the present invention was 1.93.

[0033] [Table 1]

[0034] Manufacturing Example 2 6.4g of magnesium hydroxide and 36g of calcium carbonate were added to 45g of water. 96g of 67.5% aqueous nitric acid solution was added thereto and dissolved thoroughly until it became transparent. 8.4g of glutamic acid was added thereto and dissolved thoroughly, and then 4.2g of methionine (feed additive DL-methionine, manufactured by Sumitomo Chemical Co., Ltd.) was added and dissolved thoroughly until the liquid became transparent. Thereafter, the pH of the solution was adjusted with nitric acid, and water was added and mixed so that the final volume was 200g, to obtain liquid fertilizer 2 of the present invention. The composition is shown in Table 1 (note that the numerical values ​​in the table indicate weight %). The ratio of the calcium content to glutamic acid content in liquid fertilizer 2 of the present invention was 1.7:1 by weight, and the ratio of the calcium content to methionine content was 3.4:1 by weight. The pH of liquid fertilizer 2 of the present invention was 1.40.

[0035] Test examples are shown below. The screw cap bottles in the test examples are glass bottles with polypropylene screw caps.

[0036] Test Example 1 The liquid fertilizers 1 and 2 of the present invention produced in Production Examples 1 and 2 were each placed in a screw tube bottle (100 ml each), sealed, and left to stand in a thermostatic chamber at 40° C. After three months, the presence or absence of insoluble matter was visually observed, and the effect of inhibiting the generation of insoluble matter was evaluated. The results are shown in Table 2.

[0037] [Table 2]

Claims

1. A liquid fertilizer comprising 1.0 to 5.0% by weight of glutamic acid, 1.0 to 5.0% by weight of methionine, 3 to 11% by weight of calcium, 0.5 to 4.0% by weight of magnesium, an acid component and water, wherein the ratio of the calcium content to the glutamic acid content is 11:1 to 1:3 by weight, the ratio of the calcium content to the methionine content is 11:1 to 1:3 by weight, and the pH at 25°C is in the range of 1.0 to 3.

0.

2. A liquid fertilizer as described in claim 1, wherein the acid component is nitric acid.

3. 3. The liquid fertilizer according to claim 1 or 2, further comprising potassium and at least one component selected from the group consisting of boron, manganese, iron, copper, zinc, sulfur, chlorine and molybdenum.

4. A method for cultivating crops, comprising a step of applying the liquid fertilizer according to any one of claims 1 to 3 to crops.

5. A method for stabilizing a liquid fertilizer according to any one of claims 1 to 3, comprising a step of mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3, and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:

3.

6. A method for producing a liquid fertilizer according to any one of claims 1 to 3, comprising a step of mixing a calcium compound, glutamic acid and methionine so that the weight ratio of calcium contained in the calcium compound to glutamic acid is 11:1 to 1:3, and the weight ratio of calcium contained in the calcium compound to methionine is 11:1 to 1:3.

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