JPH04202080A - Fertilizer for foliar application - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fertilizer for foliar spraying, and more particularly to a fertilizer for foliar spraying of cultivated plants containing calcium propionate as an active ingredient.

[Prior art, problems to be solved by the invention] Generally,
Calcium content and requirements vary widely depending on the type of plant. Dicotyledonous plants contain a large amount of calcium and require a large amount of calcium, but monocotyledonous plants, especially plants of the Poaceae family, have a low content and require a small amount of calcium.

Calcium plays an important role as pectin calcium, which constitutes cell walls. It plays a role similar to the skeleton of the human body. Therefore, once calcium enters a plant tissue and is utilized, it is difficult to transfer to other tissues.

In addition, in recent years it has been discovered that calcium inhibits the closing of stomata and promotes water evaporation, and is used to prevent the floating skin of Satsuma mandarin oranges.

However, although there is generally sufficient calcium in the older leaves of the plant, young shoots that are growing rapidly,
Calcium deficiency often occurs in fruits, etc.

Currently, the approved calcium fertilizers for foliar spraying include calcium formate, slaked lime, calcium carbonate,
There are calcium chloride, etc., but these substances have low solubility in water, so they are poorly absorbed from the leaf surface, and depending on the fertilizer, they can easily cause phytotoxicity.

For example, calcium chloride solution is known, but the chlorine ions in calcium chloride are not very necessary for plants, and sometimes cause problems such as fertilizing the leaves, causing dryness, and inhibiting the photosynthetic function. Therefore, it was not necessarily suitable as a fertilizer for foliar spraying.

Therefore, there has been a desire for a calcium fertilizer for foliar spraying that has high solubility in water, is easily absorbed into the plant body from the leaf surface, and does not cause any harm to the plants.

[Means and effects for solving the problem] As a result of various experiments, the present inventors found that the leaves of plants contain calcium propionate as an active ingredient, which is easily absorbed into the plant body from the leaves and has no phytotoxicity. We have discovered a fertilizer for surface spraying.

Furthermore, calcium propionate is currently used as a food additive and is highly safe for the human body.

The fertilizer of the present invention may be in either liquid or solid form, and is adjusted to form an aqueous calcium propionate solution at a predetermined concentration at the time of use. It is also possible to add a surfactant such as a spreading agent to ensure good absorption by plants.

The concentration of propionic acid and calcium in the aqueous solution sprayed on the leaves of plants varies depending on the type of plant, but numerically it is between 0.1% and 1%, preferably between 0.2% and 0.2%.
Spray with a 5% aqueous solution.

[Example] The present invention will be explained in more detail with reference to Examples. In all Examples, calcium formate, which is a commercially available fertilizer, is used for comparison with a water solution.

Example 1 10th grade apple tree (variety Jonagold) June 11th
．． Five times on the 27th of July and the 19th of July, a spreading agent (Ayer!/10Q) was added to a 0.3% aqueous solution of calcium propionate and calcium formate as a control fertilizer, and the fertilizer was applied to a level that sufficiently wet the leaves. The amount of liquid was sprayed.

After reaching maturity on October 26th and investigating the incidence of bitter bits, 15 fruits of each treatment were examined for fruit quality and the content of calcium in the pulp was measured.

The results are shown in Tables 1 and 2.

~3- Table 1 Effect of preventing bitter pit by spraying calcium propionate Table 2 Fruit quality and calcium content in pulp II 1 4 Example 2 25-year-old Satsuma mandarin tree (early ripening for quality demand) in October 11
A spreading agent (Ayer 2xQ/10Q) was added to a 0.4% aqueous solution of calcium propionate and calcium formate as a control fertilizer, and sprayed twice on October 22nd and October 22nd in an amount sufficient to wet the leaves. . Harvesting was performed on October 16th, the harvested fruits were stored at room temperature, and the incidence of floating fruit was investigated on November 27th. The results are shown in Table 3.

In addition, the floating skin degree is an average value evaluated from 0 (no) to 3 (severe).

The floating skin fruit incidence rate indicates the proportion of floating skin grades 2 (medium) and 3 (extreme).

(Margins below) Table 3 Reference example of effect of preventing floating skin fruit by spraying calcium propionate The solubility in water at 20°C is 39.9 g/100 g of water for calcium propionate, 16.9 g for calcium formate.
It was 6g/100g water.

[Effects] The present invention provides a calcium fertilizer for foliar spraying that is free from phytotoxicity and is effective in a small amount.

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Claims (1)

[Claims] Fertilizer for foliar spraying of plants containing calcium propionate as an active ingredient