JPS62289125A - Hydroponic method of edible plant - 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] a. Detailed Description of the Invention [Field of Industrial Application] This invention relates to a method for hydroponic cultivation of edible plants.

[Conventional technology]

In recent years, a lot of research has been carried out on essential elements for living organisms, but most of the essential elements that are supplied to living organisms are
Food for humans, feed and plants for animals; here, it is done through fertilizers.hlAyLTeftLre
Although considerable consideration has already been given to animals 4's + *" There is almost no attempt to consciously include essential elements for the human body.For example, the elements added to the culture solution for hydroponic cultivation are essential elements for the cultivated plants (Ca, Mg, Na, N, P
, S, C1%Fe, Mn.

Cu, ZH, B, Mo, etc.) and does not contain trace metal elements (V, Se%Co, Ge) essential for humankind.

In contrast, trace elements that are essential to humankind have only recently attracted attention due to the delay in establishing the detection limits of analytical methods and confirmation of their biological essentiality, but they are essential for humankind. The more difficult it is for a trace element to be absorbed into the body, the more effective a method of supplying it to the body must be established. Although some types of tablets are currently on the market, the number of patients suffering from essential element deficiencies shows no signs of decreasing.

[Problem to be solved by the invention 3 As mentioned above, the problem is that with conventional technology, it has not been possible to supply trace metal elements essential to humankind into the body and effectively cure these trace element deficiencies. There was a point.

[Means for solving problems]

In order to solve the above-mentioned problems, this invention provides a cultivation solution containing one or more elements essential to the human body, such as iron, zinc, manganese, copper, molybdenum, vanadium, selenium, cobalt, nickel, or germanium. Some methods employ a method of hydroponically cultivating edible plants by adding two or more kinds of metal compounds as water-soluble metal compounds. By eating edible plants containing trace metal elements that are essential to humankind, the organization aims to supply and replenish these trace elements into the human body and prevent and treat deficiency diseases. . The details will be described below.

First, the type of edible plant in this invention is not particularly limited, and any plant that can be adapted to hydroponics, germinate and grow in a relatively short period of time, and can be used as food as appropriate.

Here, the reason why we limited it to hydroponic cultivation is that the absorption efficiency of the essential trace metal elements added is good, the amount added can be reduced, and it is possible to control the concentration in the cultivation solution and prevent secondary contamination due to heavy metals, etc. Furthermore, it is extremely easy to monitor metal concentrations in plant tissue during cultivation, which is much more convenient than soil cultivation.

Next, in this invention, trace metal elements essential to the human body *4 are iron, zinc, manganese, copper, molybdenum, vanadium, selenium, cobalt, nickel, or germanium, each used alone or as a water-soluble compound. It is a mixture of two or more types (there is no problem even if elements other than the above elements are used in combination). Preferred specific examples of compounds include water-soluble compounds such as chlorides and oxides, such as ■C
13. List of FeCl3, COCl2, and GeO2. The amount of these compounds added to the cultivation solution is 0.00% per heavy metal element as a metal equivalent. IP
The amount should be approximately 100 ppm from Pb. Because 0.1
It is difficult to control the concentration of PPb when it is in small amounts (0,000 PPm), and even if it is taken into a plant, the amount of metal in the plant will not be an essential amount for the human body, and if the amount exceeds 100 PPm, the plant itself will suffer from metal overload. This is because they are not edible.

〔Example〕

As edible plants, Kaiware radish and Bundo Azuki bean sprout (
Wash these seeds three times with distilled water, spread commercially available absorbent cotton onto two plastic plates (width: 40 cm, length: 40 cm, height: 1 cm), and place one of the absorbent cotton Place 30g of Kaiware radish seeds on top, and 60g of bean sprout seeds on another piece of absorbent cotton.
were sown evenly.

Thereafter, bean sprouts were cultivated hydroponically in the dark for 8 days, and daikon radish was cultivated hydroponically in the dark until the 6th day, and then exposed to light on the 100th day.

The concentration of each compound in the cultivation solution is 10 ppm based on metals.
It was blended so that Additive metal compounds are summarized in Table 1. This was applied to each plate. In order to confirm the state in which the metals contained in these compounds are absorbed into the plant tissue, the plants being cultivated were collected every two days, and the samples were washed with distilled water. Yang 1 Na Beach Mariguchi Dai 1 Add 0.5 g each of the dried products listed above to 8 ml of nitric acid and 2 ml.
The residue obtained by wet ashing with perchloric acid and evaporation to dryness was dissolved in 2 ml of 6N-hydrochloric acid containing 25 ppm of yttrium (internal standard) and approximately the same amount of distilled water. Accurately dilute to 10ml with distilled water and
P-emission spectroscopy (equipment used is JY manufactured by Seiko Electronics Co., Ltd.)
-48P type) sample. In the example numbers, M represents bean sprouts and K represents daikon radish. Then, for each elapsed number of days, the analysis value of only the target metal element to be incorporated is shown in the Example column of Table 2 for Examples M1 to M6 [and the Example column of Table 3 for Examples 1 to 6]. It is summarized in .

Table 2 (unit: ppm) Table 3 Note that based on this invention (in order to confirm the results of the example, the above example was used as a comparative example except that no metal compound was intentionally added to the cultivation solution) We carry out hydroponic cultivation exactly the same as
Similar IC for the obtained bean sprouts and daikon radish
P emission spectroscopy was performed. This series of analysis results are the second
It is also listed in the comparative example column of Table 3. Then, the difference between the value in the Example column and the value in the Comparative Example column is the amount of absorption into the plant tissue, that is, the amount of uptake.

First, from the results in Table 2 (for bean sprouts), it is clear that the amount of metal added to the cultivation solution absorbed into the plant tissue increases with the passage of cultivation days. However, there were some differences in the tendency of increase depending on the type of metal, but it was a concave upward quadratic curve. Next, in the results in Table 3 (in the case of Kaiware radish), although the absolute value of the absorption amount is naturally different, the tendency of increase is almost the same as in the case of bean sprouts, and in both cases, the desired element is absorbed into the plant tissue. I have confirmed that it has been installed within.

〔effect〕

According to the hydroponic cultivation method for edible plants of this invention, trace metal elements essential to the human body are absorbed into the tissues of edible plants.
By consuming plants cultivated in this way, essential trace metal elements can be supplied to the human body, which can be useful for the prevention and treatment of deficiency diseases. Additionally, it has recently been found that metals are better absorbed into the human body as organic metal ions than as inorganic metal ions. It is well known that when plants absorb metals, the amount of inorganic anions is smaller than the amount of metal cations in the plants. In other words, there is a bond between the organic anion and the metal cation, and it is thought that even greater effects can be expected.

Therefore, it can be said that the significance of this invention is extremely large.

Claims (1)

[Claims] It is characterized by adding one or more trace metal elements essential to the human body, such as iron, zinc, manganese, copper, molybdenum, vanadium, selenium, cobalt, nickel, or germanium, as a water-soluble metal compound to the cultivation solution. A hydroponic cultivation method for edible plants.