JPH06107488A - Foliar surface spraying agent and treatment of plant - Google Patents

Abstract

PURPOSE:To promote the growth and fructification of a plant by improving the absorbing efficiency of boron, phosphoric acid and magnesium into the plant body. CONSTITUTION:A mixed aq. solution is prepared by dissolving water soluble magnesium dihydrogen phosphate, a water soluble boron compound in water and is sprayed on the leaves of the plant. The applying efficiency of phosphoric acid and magnesium is improved because of not applying through soil. And since boron is adequately applied together with phosphoric acid and magnesium, the growth point of the plant or the cell division in the fruit is activated to promote the growth and the fructification.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant treatment method in which an aqueous solution containing a foliar spray agent and an active ingredient to be applied to plants by foliar spray is sprayed on the leaf surface of the plant to absorb the active ingredient.

[0002]

BACKGROUND OF THE INVENTION Boron is known as a trace element involved in sugar translocation, water metabolism, calcium metabolism and the like in plants. An important action of boron in a plant is, for example, the action of forming pectin, which is a major constituent of cell membranes. Therefore, boron is indispensable at the part where cell division is actively carried out in the plant, for example, at growing points such as apices and root tips and fruits, and it is good if the plant can absorb and use an appropriate amount of boron. However, it is known that deficiency of these causes harmful effects such as growth arrest.

On the other hand, substances and energy such as proteins required in the growing point and fruits are sufficient for obtaining good growth and fruiting of plants, and most of such substances and energy such as proteins are required. It is also known that starch produced by photosynthesis is a starting material.

Chlorophyll, which is a substance responsible for this photosynthetic action, has magnesium as one of its main constituent elements, and it is also known that when magnesium in the plant is deficient, the production of chlorophyll becomes insufficient and the photosynthetic action decreases. This magnesium is not only a constituent of chlorophyll,
It is involved in the activation of various enzymatic actions in plants and in the absorption and transfer of phosphate, and laterally assists the activity of high-energy phosphate compounds in plant respiration and synthesis of new compounds.

ATP (adenosine triphosphate) is used as a substance that acts as a medium for energy transfer in relation to photosynthesis in plants, respiration and metabolism of other substances.
It is also known that phosphoric acid present in a plant body in such a form is an essential substance for plant growth and fruit set. For example, it is known that when phosphoric acid is insufficient, ATP generation and energy transfer via ATP become insufficient, and the photosynthetic action is reduced. Furthermore, phosphate is a component of the nuclear protein of cells and is also an important component of the cytoplasm. For this reason, it is also known that when the phosphate is deficient, cell division is not properly performed, and normal growth and fruit set of plants are not performed.

[0006] As described above, the efficiency of absorption of phosphoric acid into the plant body and its movement in the plant body, which are important for plants, is improved by the presence of magnesium. For example, phosphoric acid and magnesium absorb into the plant body and function in the plant body. From the aspect, it has a very deep relationship. Therefore, in order to improve plant growth and fruit set, it is sufficient to supply magnesium and phosphate, which are deeply involved in starch synthesis and energy transfer, and boron, which is deeply involved in cell division, in a well-balanced manner.

[0007]

For that purpose, for example, a mixture of magnesium phosphate and boric acid in an appropriate ratio may be applied to the plants. However, when phosphoric acid is applied through the soil, the phosphoric acid binds to iron, aluminum, etc. in the soil to form sparingly soluble iron phosphate, aluminum phosphate, etc. 10-2
It is said that the application efficiency is about 0%. Further, when magnesium is applied through soil, if potassium is relatively excessive compared to magnesium in soil, magnesium absorption may be inhibited by the antagonistic action between potassium and magnesium. In this case, there was a problem in application efficiency. Furthermore, when applying boron, phosphoric acid, magnesium, etc. through soil, it is difficult to be absorbed, for example, when the soil is dry and the soil is dry, and fertilizing components run off when there is too much rainfall. As a result, the efficiency of plant absorption depends on the water content of the soil, and stable application efficiency cannot be expected.

On the other hand, even if a component which is not efficiently absorbed into the plant body by application through soil can be improved in absorption efficiency by means such as foliar spraying, conventionally known magnesium phosphate is insoluble or difficult. Is soluble,
It was impossible to spray this on the leaves as a solution.

Therefore, it has been extremely difficult to apply boron, phosphoric acid and magnesium to plants in a well-balanced and efficient manner from soil or by foliar application. The inventors of the present invention have been conducting research on a plant application agent capable of solving this problem. However, it became possible to produce a monobasic magnesium phosphate having excellent water solubility, and various experiments were conducted for the purpose of applying this to a plant together with boron. I went. As a result, when a mixed aqueous solution of a water-soluble monobasic magnesium phosphate and a water-soluble boron compound was sprayed on the leaf surface of the plant, the efficiency of absorption of boron, phosphoric acid and magnesium into the plant body was improved, and the growth and fruiting of the plant were improved. The present invention has been completed, knowing that the That is, the object of the present invention is that boron,
Provide a foliar spray that improves the absorption efficiency of phosphoric acid and magnesium into plants and enhances plant growth and fruit set, and improves the absorption efficiency of boron, phosphoric acid and magnesium into plants and promotes plant growth. Another object of the present invention is to provide a plant treatment method that promotes fruiting.

[0010]

Means and Actions for Solving the Problems In order to solve such problems, the present invention employs the following means. That is, the gist of the first invention is a foliar spray containing water-soluble first magnesium phosphate and a water-soluble boron compound as active ingredients.

The plant treatment method according to the second invention is
The gist is to spray a mixed aqueous solution of the first magnesium phosphate and a boron compound on the leaf surface of the plant. Hereinafter, the first and second inventions will be described in more detail. The form of monobasic magnesium phosphate (Mg (H ₂ PO ₄ ) ₂ ) that can be used as an active ingredient in the first and second inventions has a crystalline state which is convenient for handling and storage.
_{(H 2 PO 4) 2 ·} 4H 2 O) is excellent in solubility and the handling of the water. Other crystal forms are insoluble or sparingly soluble in water and are not suitable for use in the present invention. In addition,
Although not necessary for a tetrahydrate, a dissolution accelerator or the like may be added when the primary magnesium phosphate is dissolved in water.

Examples of the water-soluble boron compound include boric acid and borax of alkali metals such as borax. The mixing ratio of the first magnesium phosphate and the boron compound is 500 times (0.2% concentration) of the first magnesium phosphate in terms of the concentration when made into an aqueous solution.
About 1000 times (0.1% concentration), the same for boron compounds 10
It is preferably about 00 times (0.1% concentration) to 5000 times (0.02% concentration). Therefore, for example, the weight ratio of the first magnesium phosphate powder to the boron compound powder is 1: 1 to
It is convenient to dissolve and dilute a mixture of about 1:10 with an appropriate amount of water and spray. Alternatively, it is possible to prepare an aqueous solution of the first magnesium phosphate and an aqueous solution of the boron compound in advance, mix them at an appropriate ratio, dilute to an appropriate concentration, and spray.

The concentration of the mixed aqueous solution containing the monobasic magnesium phosphate and the boron compound is preferably adjusted according to the kind of the plant to be applied and the time of application. For example, the concentration of boron compounds is about 2000 times for apples and 3000 times for grapes.
It is advisable to prepare and apply the mixed aqueous solution so that the amount thereof is about double and that of tomato is about 4000. Regarding the concentration of monobasic magnesium phosphate, for example, in the early stage of growth when cell division is active, before and after flowering when the accumulation of starch and sugar is active, and before harvesting, the weight ratio is about 500 to 600 times, and when it is used year-round, Appropriate application is about 800 times to 1000 times. Keeping the amount of phosphoric acid in the plant body at an appropriate value prevents excessive nitrogen, but in the case of improving excessive nitrogen, application of about 500 times to 600 times the same also exerts the effect of improving excessive nitrogen.

However, if the application amount of boron is excessive, there may occur a trouble due to this, so the concentration of this mixed aqueous solution is based on an appropriate amount of boron depending on the type of plant to be applied and the time of application. Is preferably determined as
It should be noted that this mixed aqueous solution is not suitable for mixing with a calcium agent because tricalcium phosphate (Ca ₃ (PO ₄ ) ₂ ) which is hardly soluble is formed when mixed with a calcium agent. Similarly, when mixed with a sulfur-based pesticide, hydrogen sulfide gas is generated, so it is not suitable for mixed use with a sulfur-based pesticide. Except for these calcium agents and sulfur-based pesticides, they can be mixed with various pesticides.

The mixed aqueous solution containing the first magnesium phosphate and the boron compound is sprayed on the leaf surface of the plant by using an appropriate means such as a sprayer. Contact with soil components such as iron and aluminum that make phosphoric acid a sparingly soluble compound is avoided,
The absorption efficiency of phosphoric acid into the plant is improved. In addition, since magnesium is applied at the same time to improve phosphoric acid absorption by plants and phosphoric acid transfer efficiency in plants, phosphoric acid absorption from leaves and phosphoric acid transfer efficiency in plants is further improved. Furthermore, since it is applied without soil, the inhibition of magnesium absorption due to the antagonistic action with potassium in soil is avoided, and the magnesium absorption efficiency is also improved. Therefore, the absorption and transfer of phosphoric acid can be performed more efficiently. Since the mixed aqueous solution is sprayed on the leaves, the absorption efficiency of boron becomes good.

[0016] Involved in the action of forming pectin, which is a major constituent of cell membranes, is a main component of boron and chlorophyll, which are essential in the part where cell division is actively carried out in plants, and is involved in the metabolism of phosphate in plants. That absorbs various enzymes that activate various enzymes and phosphoric acid, which plays an important role as an energy transfer component in the synthesis of various substances required for plant growth such as photosynthetic action, are simultaneously and efficiently absorbed in the plant body. . It can supply magnesium and phosphate, which are deeply involved in starch synthesis and energy transfer, and boron, which is deeply involved in cell division. Therefore, the growth points and fruits are supplied with sufficient substances and energy necessary for fruits, and further, boron, which is indispensable for the formation of cell membranes associated with cell division, is sufficient, so that plant growth and fruiting are good.

Further, since boron, phosphoric acid and magnesium in the plant can be provided in sufficient amounts, the growth promotion,
In addition to increasing the yield by increasing cell division, it also has the effect of increasing the yield in the next year by promoting flower bud differentiation, enhancing the conversion of starch to sugar, and improving the maturation of branches due to excess nitrogen.

It is desirable that the mixed aqueous solution containing the first magnesium phosphate and the boron compound, which is sprayed on the leaves, is weakly acidic, but the first magnesium phosphate tetrahydrate crystal (M
g (H ₂ PO ₄₎ When ₂ · 4H ₂ O) using a weakly acidic aqueous solution can be conveniently prepared. Therefore, also in this respect, the monobasic magnesium phosphate tetrahydrate crystal is suitable for use in the present invention.

[0019]

The present invention will be described in detail below with reference to preferred examples. (Example 1) Tetrahydrate of tetrabasic magnesium phosphate (Mg
_{(H 2 PO 4) 2 ·} 4H 2 O) 87.5 parts by weight of boric acid 12.
5 parts by weight of 100 g of the mixture was dissolved in 50 liters of water to obtain a mixed aqueous solution. This corresponds to an aqueous solution having a concentration of primary magnesium phosphate of 571 times and a concentration of boric acid of 4000 times. This mixed aqueous solution was sprayed on the leaf surface of fruit vegetables such as tomatoes and melons with a sprayer over the initial period of growth, before and after flowering, and before the harvest for three periods. When this was compared with the same type of fruit vegetables that were not sprayed with the mixed aqueous solution, in any kind of fruit vegetables, there were significant differences in the growth state, the number of flowers, the number of fruit sets, the coloration of fruits, the sugar content of fruits and the yield Was observed, and the foliar spray of the foliar spray of the present invention was excellent. (Example 2) Monohydrate magnesium tetrahydrate crystal (Mg
_{(H 2 PO 4) 2 ·} 4H 2 O) 83.3 parts by weight of boric acid 16.
7 parts by weight of 100 g of the mixture was dissolved in 50 liters of water to obtain a mixed aqueous solution. This corresponds to an aqueous solution having a concentration of primary magnesium phosphate of 600 times and a concentration of boric acid of 2994 times. This mixed aqueous solution was sprayed on the leaf surface of various fruit trees such as grapes with a sprayer throughout the year. When this was compared with fruit trees of the same species that were not sprayed with the mixed aqueous solution, in any kind of fruit trees, there were significant differences in growth state, number of flowers, number of fruits, coloration of fruits, sugar content and yield of fruits. Was observed, and the foliar spray of the foliar spray of the present invention was excellent.

[0020]

As is apparent from the above description,
The foliar spray of the present invention improves the efficiency of absorption of boron, phosphoric acid and magnesium into plants, and promotes plant growth and fruit set. In addition, according to the plant treatment method of the present invention, it is possible to improve the efficiency of absorption of boron, phosphoric acid and magnesium into the plant body and enhance the growth and fruit set of the plant.

Claims (2)

[Claims] 1. A foliar spray comprising a water-soluble monobasic magnesium phosphate and a water-soluble boron compound as active ingredients. 2. A method for treating plants, which comprises spraying a mixed aqueous solution of a first magnesium phosphate and a boron compound on a leaf surface of the plant.