JPS59120026A - Cultivation of plant with low oxalic acid content - 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 The present invention relates to a method for cultivating plants with low oxalic acid to obtain plants with low oxalic acid. According to the Food Composition Table (commonly known as the "Food Composition Table"), it has been reported that vitamin C in vegetables has decreased dramatically over the past 19 years.
85 spinach, 22% radish leaves, 20 green peppers
% and 80% of mandarin oranges, and the decrease in vitamin C in vegetables and fruits has become a major national problem (October 1982).
Top article on the front page of the Asahi Shimbun dated February 2nd and 7th (Document 1)
and the morning newspaper dated 811 of the same month (see Document 2). The lack of vitamin C in vegetables has been featured in weekly newspapers, and many books on easy-to-use vitamin supplements are selling, and more and more people are taking vitamin supplements. Nutritionally, the main purpose of humans eating vegetables and fruits is to ingest vitamin C, but vitamin 0 is a raw material for the formation of oxalic acid in plants. Therefore, increasing the amount of vitamin C in vegetables increases the amount of oxalic acid in the vegetables. Oxalic acid inhibits calcium absorption in the urinary tract.

Since it can cause stones, in modern times when we eat raw vegetables in salads and juices, oxalic acid buildup occurs. To neutralize the harmful effects of oxalic acid, there is a method of increasing the amount of calcium ingested at the same time and excreting it from the human body as calcium oxalate, but Japan, a volcanic country, has acidic soil and lacks calcium. Because of this, it is not possible to expect much calcium from vegetables, and it is recommended to replenish calcium through intake of milk, small fish, etc.

It is an object of the present invention to provide a method for cultivating plants that is easy to supplement with calcium, significantly increases the vitamin C content of vegetables and fruits themselves, and significantly reduces oxalic acid compared to ordinary ones.

Traditionally, it has become common knowledge around the world to "prepare the soil" by adding inorganic or organic nitrogen fertilizer to the soil for growing plants. The present invention is an agriculture that does not create or cultivate soil, which is the exact opposite of the conventional agriculture that cultivates soil and cultivates it, and does not restrict general agriculture. Rather, deserts that were not used for agriculture,
The agriculture of the present invention can be used in barren areas such as Iwata, highly saline areas, or continuous cropping areas that are no longer suitable for agriculture. However, the method of the present invention can of course also be applied to general farmland.

Contrary to the world's common sense, the present invention begins by reducing the nitrogen content of plant cultivation soil to eliminate soil fertility.

To reduce the nitrogen content in the soil, you can burn the soil, wash it with a large amount of water, or dry it in a greenhouse.

This is the first time in the world that soil thinning work has been carried out in this way. Select an appropriate method to eliminate soil fertility depending on the location where the plant is grown. For example, in the case of 0 greenhouse tunnel cultivation as shown below, the roof of the greenhouse tunnel should be made of glass, plastic, or other material that allows light to pass through but does not allow rainwater to pass through.

Make the cultivation soil as highly ridged as possible to aid drying. Due in part to sunlight, the inside of the greenhouse becomes hot and dry.

As a result, the area becomes a desert in a short period of time, and nitrogen fertilizer escapes into the air. After germination or planting, ensure proper ventilation and maintain appropriate temperature.

In the case of high-ridge mulch cultivation, make the ridges as high as possible to dry the cultivation soil. Prevent rain water by spreading plastic mulch film around the base of the plants. For fertilization, pipes and tubes are installed between the mulch film and the cultivation soil, and liquid fertilizer diluted with water is used.

In the case of potted cultivation, cultivation is carried out on a stand in an inner pot made of a water-permeable material, such as a non-woven fabric, in an outer pot provided with drainage holes. Since the plants are surrounded by a layer of air, they can be dried out.Next, water and nitrogen fertilizers are cut off after the plants germinate or are planted. The traditional method of cultivating plants was to provide them with water and fertilizers, but in the present invention, on the contrary, they are forced to fast without providing them with water or nutrients. In a state of fasting in barren ground, the roots of plants desperately move underground in order to survive.

Once the plant begins to surrender due to fasting, it will be about 1/10th of the conventional rate]
/100 plants with small amounts of water and nitrogen fertilizer will wilt
It is normal for the plants to wither once they start, but in the present invention they will recover and grow.It is preferable to use water and nitrogen fertilizer in an amount that is adsorbed only on the ground surface. It is preferable to divide one batch into approximately 30 or more batches. For liquid fertilizers with a nitrogen content of 10%, it is preferable to dilute them approximately 300 to 1000 times with water. , apply a small amount of water and nitrogen fertilizer again. Fasting and feeding are repeated in this way until the plants grow. By repeating this process, the plants will become more tolerant of drought and less fertilizer. The aboveground part of the plant begins to grow in a controlled manner. Underground, it produces fasting roots near the ground surface that have strong water and fertilizer absorption abilities. In the present invention, the term "near the ground surface" refers not only to the vicinity of the ground surface, but also includes the ground surface. Fasting roots are thinner and whiter than conventional capillary roots. When fasted roots are produced, plants high in vitamin C are harvested. It takes about 20 days to harvest spinach. Analysis by the National Institute of Nutrition (October 23, 1982)
According to the method, the results shown in the middle column of Table 1 below were obtained.

Table 1 Total vitamin Q value (1009-medium) As shown in the middle column of Table 1, the value of commercially available spinach is 50Tn9;
56.8 to 496.9 rn9, which is actually about 7 to 10
The number of shifts was doubled.

The size of garland chrysanthemum was 321.57n9, about 10.5 times the commercially available 21m9, and the daikon radish's size was 318.8n9, about 4.6 times the commercially available 70m9.

When the fasting roots spread into a mat near the ground surface, the tap roots and capillary roots that existed up until now disappear or decrease in size. Taking spinach from the Kanto and Tokai regions as an example, this phenomenon can be seen for about 20 days in October in the fall and 30 days in the winter.0 In order to reduce oxalic acid, tap roots and taproots containing a lot of oxalic acid can be seen. It is better if the number of capillary roots decreases. When there is a lot of oxalic acid, the same content is present in the above-ground parts and roots, and when there is little oxalic acid, the content is about 1/3 of the total plant content in the roots.

When the fasting roots have spread into a mat near the ground surface and the tap roots and capillary roots have withered or decreased, the
Apply a small amount of water and nitrogen fertilizer to make the plants grow rapidly.

The method of the invention avoids over-watering. If too much water is applied, the fasted roots will turn into thick capillary roots.If too much water is applied, the thick capillary roots will turn from white to brown and eventually rot. There is an example in which the amount of oxalic acid in the whole plant increased from 750 m9/1007 to 1000 m9 when water was used extensively for 5 days after mat roots were formed. At this time, the content of oxalic acid in aboveground parts and roots was the same. The method of the present invention does not use organic matter. If you apply ripe compost, the roots of the mat will not be damaged, but they will become thick white roots.

This root contains a lot of oxalic acid and has the effect of producing oxalic acid. In incomplete compost, the mat roots become burnt and brown. The brown capillary roots have a large amount of oxalic acid, and their role is to transport oxalic acid to the aboveground parts.

In the method of the present invention, it is preferable to block light to protect the mat roots. 0. Mat roots near the ground surface are sensitive to direct light. 0. Black mulch made of poly film in winter and white mulch in summer are effective. 0. Toppling of plants. It also has this light blocking effect.

The method of the present invention does not use herbicides.The highly active mat roots on the ground surface are damaged by herbicides, and the tips of the mats stop growing, and many finely branched ciliated roots are lost, resulting in thalidomide disease. Mat roots VC 0 If the herbicide is used too much or if the effect is strong, the mat roots will decrease or disappear a little. It becomes thick. This is because the amount of oxalic acid increases.

The method of the present invention does not involve inter-tilling.
Intertillage is so central to agricultural work that there is a saying, ``ure, culture''. When the pine roots are cut by intertillage,
When the amount of oxalic acid is immediately increased during cultivation, the taste of vegetables and fruits immediately becomes bitter, and anyone can sense that the amount of oxalic acid has increased. This intercultivation will not be done. This is because it damages the roots of the mat.

In the method of the present invention, it is preferable to maintain the plants at an appropriate temperature.

If crops are managed at appropriate temperatures, mat roots will remain active for a long time and oxalic acid will not increase.

- In the method of the present invention, it is preferable to adjust the pH of the soil to a value vc suitable for other substances.

The method of the present invention does not use pesticides that damage roots. The roots of vegetables and fruits treated with lead arsenate will be damaged and the taste will turn bitter.

This is due to the increased amount of oxalic acid.

Plants are harvested early before the fasting roots become senescent.

There is a limit to the number of days that mat roots can be maintained, and the roots age. That is, the white roots turn brown or begin to wither.

The amount of oxalic acid in plants increases with the number of days they are cultivated, so plants with low oxalic acid can be harvested in large quantities by growing rapidly before they age.

According to the analysis by the National Institute of Nutrition, the results shown in Table 2 below were obtained.

Table 2: Amount of oxalic acid in Spinach 1009 (m9) Even with the same spinach, younger leaves have less oxalic acid, while older outer leaves have more oxalic acid. Content: 319 young leaves, 428 ~ middle leaves, 72 whole leaves per 100
The analysis of plants according to the method of the present invention, for example, in the case of spinach, resulted in the results shown in Table 3 below.0 The number is the number of m9 out of 1000Table 3 The present invention According to
We were able to obtain 00m9 of spinach (each out of 100).

Thus, according to the present invention, it was possible to obtain a plant containing significantly more vitamin G and significantly less oxalic acid than conventionally cultivated plants.

It goes without saying that various changes and modifications can be made to the present invention without departing from the spirit and vision of the present invention.Q Patent Applicant: Nagata Farm Co., Ltd.

Claims (1)

[Claims] 1. (1) Reduce the nitrogen content of plant cultivation soil to eliminate soil fertility, (2) Cut off water and nitrogen fertilizer after germination or planting, (3)
If plants begin to wilt in poor land that has been deprived of water and nitrogen fertilizer,
Apply a small amount of water and nitrogen fertilizer, about 1/1 to 1/100 of the conventional amount, and repeat steps (4) (2) and (3) to create fasting roots with strong water and fertilizer absorption near the ground surface. (5) Repeat steps (2) and (3) until the fasting roots spread in a mat shape near the ground surface and become mat roots, and when the tap roots and capillary roots have withered or decreased, A small amount of water and nitrogen fertilizer of about 172 to 1/□0 is applied to make the plants grow rapidly, and (6) plants with low oxalate are harvested before the matted roots become senescent. Cultivation method.