JP3069204B2 - Nutrient cultivation method of spinach - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to a hydroponics method of spinach, for more information without the need for disinfection and sterilization of the culture medium, it is possible to suppress the onset of root圈部minute, moreover imperial carriage
The present invention relates to a method for hydroponics of spinach , which can produce not only good growth of sow but also good harvest.

[0002]

2. Description of the Related Art Generally, in hydroponic cultivation of plants, an EC value (a value representing electric conductivity, that is, electric conductivity) is 3.
mS / cm (mS: milliSiemens) or less, pH
At present, a culture solution having a value of 5.0 to 6.5 is used, and the temperature of the culture solution is controlled under conditions mainly controlled at 16 to 22 ° C. It is also known that, if the control value is deviated, some troubles generally occur in the plant itself, and the growth and maturation are significantly suppressed. Therefore, the EC value is set to 3 to 4 mS / c only during a certain period of the cultivation period such as the cultivation period such as the breeding period in which the quality of seedlings is improved and the sugar content of tomatoes and melons is increased.
Except for cultivation at or above m, high EC hydroponic cultivation through plant cultivation is not commonly practiced. Under such circumstances, a hydroponic cultivation method capable of obtaining a harvest with better plant growth and a longer life is desired.

[0003] On the other hand, when a culture solution is collected and used in circulation, the spread of a disease through the culture solution is very easy. Therefore, sterilization and sterilization of the culture solution are performed by irradiation with an ultraviolet lamp, high-temperature sterilization of the culture solution, and the like.
However, treatments such as sterilization by these methods include:
It causes many problems such as an increase in equipment costs, an increase in running costs due to the use of electricity, a decrease in sterilization efficiency with use time, a chemical reaction in a culture solution by ultraviolet rays, and cooling after high-temperature sterilization.

[0004] The present inventors have conducted intensive studies in order to provide a nutrient solution cultivation method which has solved such conventional disadvantages. As a result, surprisingly, by adjusting the pH value to 4.0 to 7.5 at the same time in the high EC region, which was conventionally considered unsuitable, that is, in the EC value range of 8 to 16 mS / cm, In spinach nutrient cultivation, without the sterilization or sterilization treatment of the culture solution, not only to suppress the onset of the root zone, but also to improve the growth of spinach ,
Finding that you can get a long-lasting harvest,
The present invention has been completed based on this finding.

[0005]

SUMMARY OF THE INVENTION Namely, the present invention provides a method of cultivating spinach using the culture solution, boric
From the germination to the harvest of spinach , the EC value of the culture solution used for cultivation is set to 8 to 16 mS / cm, and the pH value is set to 4.0 to 7.5 to cultivate spinach . It provides a liquid cultivation method.

The present invention relates to a method for cultivating spinach in a nutrient solution. Here, the hydroponic cultivation is roughly classified into solid medium cultivation and hydroponic cultivation depending on the presence or absence of a medium, and the method of the present invention can be applied to any of them. The conditions other than the culture solution described below may be performed under known conditions.

[0007] In the method of the present invention, the EC value of a culture solution used for cultivation from the time of germination to the time of harvest of spinach is determined.
8 to 16 mS / cm, and the pH value is 4.0 to 7.0.
It is necessary to cultivate the plant at 5, preferably 4.0-7.0.

[0008] Here, the EC value of the culture solution used for cultivation is 8
If it is less than mS / cm, it is not preferable because the root zone becomes susceptible to disease, the growth of plants deteriorates, or it becomes impossible to obtain harvested products having a long life. On the other hand, the EC value of the culture solution used for cultivation is 16 mS
/ Cm, growth is remarkably suppressed, or
It is not preferable because spinach dies. Further, when the pH value of the culture solution used for cultivation is less than 4.0, or when the pH value exceeds 7.5, growth is significantly suppressed or spinach dies. Therefore, it is not preferable. In the present invention, both the EC value and the pH value of the culture solution need to be within the above range, and even if only one of them falls within the above range, the object of the present invention cannot be achieved. .

[0009] Usually, the culture solution does not need to be replaced during the cultivation period, and may be adjusted so that the EC value and the pH value of the culture solution are within the above ranges from the time of germination to the time of harvest of spinach . The adjustment of the EC value and the pH value of the culture solution may be performed using an EC meter or a pH meter. The composition of the culture solution is not particularly limited as long as it satisfies the above conditions, and a composition used for ordinary hydroponic culture and the like may be used.

Further, in the present invention, it is necessary to perform cultivation using the above-mentioned culture solution from the time of germination to the time of harvest of spinach. Even if cultivation is performed using a culture solution as described above, the object of the present invention cannot be achieved. Before and during germination, it is not particularly necessary to cultivate using the culture solution as described above. In the method of the present invention, the use of such a culture can be grown without causing a fault or the like spinach, further continuous or anniversary imperial carriage
It is possible to grow sows .

The method of the present invention is particularly suitable for cultivation of spinach.
Effectively applied to

Further, cultivation conditions (conditions such as temperature, humidity, light irradiation, etc.) may be appropriately selected according to the kind of spinach and the like. In the method of the present invention, there is no need to sterilize or sterilize the culture solution by irradiation with an ultraviolet lamp or high-temperature sterilization of the culture solution, but these treatments may be performed if necessary.

The method of the present invention can be specifically carried out, for example, by the following method. First, as the medium, for example, using a urethane foam of medium and the like, boric thereto
After seeding and germinating spinach seeds, seedlings are grown using the culture solution as described above. When the spinach seedlings have grown to some extent, they may be planted, for example, on a styrofoam planting bed and cultivated again using the same culture solution as before the planting. During the cultivation period, it is necessary to adjust the culture solution so that the EC value and the pH value do not change from the initial stage of the cultivation.
When the spinach has grown sufficiently, it can be harvested.

[0014]

Next, the present invention will be described in detail with reference to examples. Example 1 (Cultivation of spinach) Spinach seeds are sown on a urethane foam medium (mat having a shape of a mat of 25 x 25 x 27 mm that can be torn off in a cube), and 8 to 10 seeds per spinach are germinated and cultured for cultivation after germination. Liquid A (a hydroponic solution according to the Yamazaki prescription and an EC value adjusted to be 8 to 11 mS / cm) (the present invention section) or a culture solution B for cultivation (a hydroponic solution according to the Yamazaki prescription) The EC value is 2.0 mS / cm) (control)
Seedlings. While the spinach seedlings at the 0.5 to 1.0 leaf stage are grown on the urethane foam, the urethane foam mat is torn off in a cube shape, and is planted on a styrofoam planting floor so that the interplant space is 7 cm. Again, each was cultivated on the NFT cultivation bed using the same culture solution as before the planting. During the cultivation period, the culture solution was adjusted so that the EC value did not change from the initial stage of cultivation. The pH of the culture solution
Was controlled at 4.5 to 6.5 in each case.

On the 35th day after sowing, each spinach was harvested, its weight was measured, and the average value per cube was shown in Table 1 as the weight of the plant after cultivation. The number of strains per urethane foam cube is 5 to
There were seven strains. As is clear from Table 1 below, according to the present invention using the culture solution A for cultivation, the culture solution B for cultivation was used.
It can be seen that the weight of the strain is increased by about 20% as compared with the control group using. Furthermore, only the root portion of the spinach harvested on day 35 after sowing was removed, placed in a polyethylene bag so as not to dry while the urethane foam was attached, and stored refrigerated at 5 ° C or lower to change the plant body. Observe
The number of days of life was checked. Here, the number of days to keep is 5 ℃
The appearance of the plant when stored below is visually observed, and indicates the number of days elapsed from the start of storage to the time when the freshness of the plant is not maintained, such as the collapse of the plant. . The results are shown in Table 1. As is clear from the following Table 1, in the present invention section using the culture solution A for cultivation,
Although the same appearance as that at the time of harvesting was maintained even on the 25th day after the start of storage, in the control plot using the culture solution B for cultivation, a part of the plant body was 5 to 7 days after the start of storage. It began to brown, and the appearance became such that it could be judged that freshness was not maintained, such as collapse of the plant, 7 to 10 days after the start of storage.

[0016]

[Table 1]

Example 2 (Continuous cultivation of spinach) Spinach seeds are sown on a urethane foam medium (mat having a size of 25 x 25 x 27 mm, which can be torn into a cube), and 8 to 10 seeds per spinach are sown. Cultivation medium A (a hydroponic solution according to Yamazaki prescription and adjusted to an EC value of 8 to 11 mS / cm) (invention section) or cultivation medium B (Yamazaki prescription) Hydroponic solution with EC value of 2.0 mS / cm (control)
Seedlings. While the spinach seedlings at the 0.5 to 1.0 leaf stage are grown on the urethane foam, the urethane foam mat is torn off in a cube shape, and is planted on a styrofoam planting floor so that the interplant space is 7 cm. Again, each was cultivated on the NFT cultivation bed using the same culture solution as before the planting. The pH of the culture was controlled between 4.5 and 6.5 in each case. The above cultivation was carried out at intervals of two weeks, and without changing the culture solution, E
Only the C value was adjusted to each value, and cultivation was performed. The first cultivation of seedlings and cultivation
The cultivated one week later was continuously cultivated as a second cultivation, and thereafter as a third cultivation, a fourth cultivation, and so on.

Table 2 shows the percentage of strains that could be grown to adult strains when cultivated in each culture solution. Here, the percentage of the strains that can be grown up to the adult strain is represented by the following equation.

[0019]

## EQU1 ## Proportion (%) of strains cultivated to adult stock = [(number of strains cultivated to adult strain) / (number of germinated strains)] × 100

As is evident from Table 2 below, in the plot of the present invention using the culture medium for cultivation A, the disease was not observed in the root zone, and cultivation could be continued. In the control plot using No., the disease such as root rot was observed in the roots from the second cultivation, and it can be seen that as the number of cultivations increased, the rate of spinach that could be cultivated up to the adult strain significantly decreased.

[0021]

[Table 2]

[0022]

According to the method of the present invention, by cultivating the spinach with a specific culture over to harvest after germination, good growth of spinach, moreover be obtained shelf life good crop it can. In addition, according to the method of the present invention, spinach can be cultivated continuously or throughout the year without causing any obstacles. further,
According to the method of the present invention, without the need for sterilization and sterilization of the culture solution, while suppressing the onset of root圈部min Hourenso
It is possible to perform the cultivation of the window. Therefore, the present invention is, ho
It can be used effectively for cultivation of Urensou .

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Mochizuki 1280 Kamiizumi, Sodegaura-shi, Chiba Idemitsu Kosan Co., Ltd. (72) Inventor Futa Hattori 1-9-20 Higashiyama-cho, Kasugai-shi, Aichi Prefecture Sansui Co., Ltd. (56) References Journal of Horticultural Science (1986) 61 (3) pp. 361-366 (58) Fields investigated (Int. Cl. ⁷ , DB name) A01G 31/00

Claims (2)

(57) [Claims] 1. A method for cultivating spinach using a culture solution, wherein an EC value of a culture solution used for cultivation is from 8 to 16 mS / cm and a pH value is 4.0 from germination to harvest of spinach. Hydroponic methods spinach, which comprises cultivating the spinach <br/> as 7.5. 2. The method according to claim 1, wherein the spinach is cultivated continuously or throughout the year.