JPS6228117B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a fertilizer that is applied to the leaves of plants in order to absorb calcium into the plants. Generally, in plants, calcium content is
It is known to be effective for plant growth, such as increasing the assimilation power of cells, strengthening nutrient translocation, and promoting plant growth. Conventionally, for example, lime is fertilized into the soil and the calcium in the lime is absorbed by the plant roots, but this method does not allow the calcium to be absorbed by the carbon dioxide and rainwater released from the roots. It reacts and flows underground in the form of calcium bicarbonate, or it reacts with nitrate ions, sulfate ions, chloride ions, etc. given to the soil by other chemical fertilizers and forms calcium nitrate, calcium sulfate, calcium chloride, etc. Therefore, the calcium content was not absorbed into the plant body sufficiently. In addition, calcium absorbed into the plant body generally has a property that it is difficult to move from old tissues to new tissues within the body, so calcium is distributed throughout the plant from the roots to the stems to the leaves. have not been adequately supplied for a long time,
Therefore, the plant growth effect was not fully exhibited. For this reason, calcium is sometimes sprayed on the leaves of plants to be absorbed into the plant body through the leaves.For example, calcium chloride solution is known as a spraying agent for this purpose, but calcium chloride The chlorine ions contained therein were not very necessary for plants, and sometimes caused the leaves to wither and inhibit the photosynthetic function of the leaves, so it was not necessarily suitable as a fertilizer for foliar spraying. In view of these circumstances, the present inventor has conducted various experiments, and as a result has come up with a fertilizer for foliar spraying that is highly absorbable from the leaves into the plant body and does not cause any harm to plants in terms of its ingredients. Its gist lies in a fertilizer for foliar spraying on plants containing calcium formate as an active ingredient. Next, the present invention will be explained by giving experimental examples. Table 1 shows the amounts of various calcium-containing compounds dissolved in water (water temperature 20°C) and their PH values.

[Table] As is clear from Table 1, the amount dissolved in water is in the order of calcium chloride>calcium formate>calcium lactate>monocalcium phosphate>calcium hydroxide, and calcium chloride and calcium formate according to the present invention have a larger amount dissolved in water. It is easiest to produce a dusting agent containing this as an active ingredient. Also, PH
Comparison of values shows that calcium formate solution and calcium chloride solution are almost neutral and cause the least harm to plants from acids or bases, followed by weakly acidic calcium lactate solution, and the most unsuitable one is strongly acidic calcium lactate solution. These are monobasic calcium phosphate solution and strongly alkaline calcium hydroxide solution. However, as mentioned above, calcium chloride solution containing chloride ions has the disadvantage of damaging leaves, whereas calcium formate solution, when decomposed, generates carbon dioxide and water that are useful and harmless for plant growth. In this respect, calcium formate is preferable to calcium chloride in terms of its composition. Next, among the compounds shown in Table 1 above, calcium formate and calcium lactate were formulated into a predetermined spraying agent, and then an experiment was conducted by actually spraying them on the leaves of plants. As an experimental method, calcium formate
Create diluted aqueous solutions of 50x, 100x, and 50x calcium lactate, and add a spreading agent (Aglar) to this.
5,000 times) to make a spraying agent, and each of these spraying agents was sprayed on the leaves of M26 seedlings grafted on a Marubakaido stand. After being left for about 30 days, the leaves were picked, dried with hot air, and subjected to wet decomposition, and the amounts of calcium and magnesium contained in the dried matter were quantitatively analyzed using the EDTA method. The results are shown in Table 2.

[Table] As is clear from Table 2, the amount of calcium contained in leaves is the same for both 50x and 100x when sprayed with calcium formate solution, without foliar spraying, and when calcium lactate solution is sprayed. In addition, the amount of magnesium was the highest in the calcium formate liquid spray. This means that the calcium ions in the calcium formate solution are better absorbed by plants than the calcium ions in the calcium lactate solution. It is thought that the magnesium content in the leaves was absorbed actively through the roots. Since magnesium activates photosynthesis in leaves, it can be expected to further promote plant growth. As explained above in the examples, since the foliar spray fertilizer according to the present invention contains calcium formate as an active ingredient, the calcium content in the fertilizer is efficiently absorbed into the plant body through the leaves, and the fertilizer is absorbed into the plant body through the leaves. Encourage growth. In addition, after calcium formate absorbs its calcium content, it decomposes into carbon dioxide and water, which not only do not cause any harm to plant growth, but also contribute effectively to plant growth. There is no problem with drying leaves, which is the case with conventional sprays containing calcium chloride. Therefore, the growth of plants is significantly increased compared to the conventional method, which is industrially beneficial.

Claims (1)

[Claims] 1. Fertilizer for foliar spraying of plants containing calcium formate as an active ingredient.