TWI670252B - Cultivation method of low potassium content vegetable - Google Patents

Abstract

The invention provides a cultivation method of low potassium content vegetables, which is cultivated by a solid medium, and the cultivation method of the low potassium content vegetables comprises the following steps. Provide a vegetable propagule. A seedling step is carried out to obtain a vegetable seedling. A first cultivation step is carried out which is cultivated with a first fertilizer composition. Performing a second cultivation step of cultivating with a second fertilizer composition to obtain a low potassium content vegetable, wherein the first fertilizer composition comprises phosphoric acid, potassium and nitrogen, and the second fertilizer composition comprises phosphoric acid, nitrogen , calcium and magnesium. Thereby, the low potassium content vegetable cultivated by the cultivation method of the low potassium content vegetable of the present invention can provide a healthier eating choice and has a good market potential.

Description

Method for cultivating low potassium content vegetables

The present invention relates to a method for cultivating vegetables, and more particularly to a method for cultivating vegetables having a low potassium content.

The kidney is the main organ of the human urinary system. It filters impurities in the blood, regulates the body's moisture content, and maintains the balance between body fluids and electrolytes. It also converts excess water and waste into urine and is excreted from the body. Once the kidney function is abnormal, it may affect the body's metabolism and cause chronic kidney failure (also known as kidney disease), and even more may pose a serious threat to life.

In the care of patients with kidney disease, the most important consideration is to control the patient's diet to avoid further stress on the kidneys caused by excessive minerals or nutrients in the diet. However, in vegetable foods, such as Compositae and Cruciferous vegetables, the potassium ion content in the leaves is higher, and the kidney is the main regulating organ of potassium ion concentration in the human body. Therefore, patients with kidney disease are eating the aforementioned Before the vegetable food, you must go through the steps of Chuan hot to release excess potassium ions, thus not only affecting vegetable foods. The convenience of the food, the Sichuan hot step will also cause other nutrients in vegetable foods to be destroyed by high temperature, and the removal rate of potassium ions is not ideal.

In order to adjust the potassium ion content in vegetable foods, the farmers have cultivated by hydroponic cultivation in order to obtain vegetable foods with low potassium content by adjusting the nutrient composition of the water culture liquid. However, the cultivation system by hydroponic cultivation dissolves all nutrients required for the crops in the nutrient solution, and circulates the aforementioned nutrient solution in the pipeline in the hydroponic system to facilitate large-scale systematic cultivation and facilitates The nutrients are supplied to each cultivated plant through the flow channel. Therefore, in addition to timely adjustment of the nutrient components in the nutrient solution, the pH value and EC value should be monitored at any time to ensure that the plant can obtain sufficient nutrients and normal. Growing. Furthermore, since the flow channels of the hydroponic cultivation system are connected to each other, once plant diseases occur, the speed of disease transmission will be accelerated, and a large area of crop damage will be caused. Thus, the cultivation of vegetable plants by hydroponic cultivation is The production process is not only complicated and time-consuming, but also has a high production cost. It is also difficult for the quality and disease management of vegetable plants.

Therefore, how to provide a vegetable culture method capable of cultivating a low potassium content vegetable and provide a low potassium content vegetable for use in diet control of a kidney disease patient has become a goal of those skilled in the related art.

The object of the present invention is to provide a method for cultivating vegetables with low potassium content, which can effectively reduce the two-stage cultivation method through different nutrient supply. The potassium content of low vegetables makes it a healthier dietary choice and can be further applied to dietary control in patients with kidney disease.

An embodiment of the present invention provides a method for cultivating a low potassium content vegetable, which is cultivated by a solid medium, and the method for cultivating the low potassium content vegetable comprises the steps of: providing a vegetable propagule; performing a seedling step, the system Planting the aforementioned vegetable propagule in the solid medium mentioned above and cultivating a seedling period to obtain a vegetable seedling; performing a first cultivation step of cultivating the vegetable seedlings during the first cultivation period and applying a first a fertilizer composition, wherein the first fertilizer composition comprises phosphoric acid, potassium, and nitrogen, and is 1 wt% based on phosphoric acid, 3 wt% to 5 wt% of potassium, and 4 wt% to 7 wt% of nitrogen; a step of cultivating the vegetable seedlings cultivated in the first cultivation step during a second cultivation period and applying a second fertilizer composition to obtain a low potassium content vegetable, wherein the second fertilizer composition comprises phosphoric acid, nitrogen, calcium and Magnesium, based on 1 weight percent of phosphoric acid, 7.5 weight percent to 10 weight percent nitrogen, and 7.5 weight percent to 9.5 weight calcium Percentage percent to 4 weight percent magnesium, 1.5 wt. Wherein, the potassium content of one of the aforementioned low potassium content vegetables is 30% to 60% of the potassium content of one of the vegetables cultivated without the above-mentioned low potassium content vegetable cultivation method.

According to the aforementioned cultivation method of the low potassium content vegetable, the aforementioned seedling period may be 10 days to 20 days.

According to the aforementioned cultivation method of the low potassium content vegetable, the aforementioned first cultivation period may be 10 days to 20 days.

According to the aforementioned cultivation method of the low potassium content vegetable, the aforementioned second cultivation period may be 14 days to 30 days.

According to the above cultivation method of the low potassium content vegetable, the nitrate content of one of the aforementioned low potassium content vegetables is lower than the nitrate content of the vegetable cultivated by the cultivation method of the low potassium content vegetable.

According to the aforementioned cultivation method of the low potassium content vegetable, in the aforementioned first fertilizer composition, potassium may be from 3.7 weight percent to 4.5 weight percent based on 1 weight percent of phosphoric acid, and nitrogen may be from 5.5 weight percent to 6.5 weight percent.

According to the aforementioned cultivation method of the low potassium content vegetable, wherein the second fertilizer composition described above may be 1 wt% based on phosphoric acid, 8 wt% to 9.5 wt% of nitrogen, and 8 wt% to 9 wt% of calcium. Magnesium can range from 2 weight percent to 3.5 weight percent.

According to the aforementioned cultivation method of the low potassium content vegetable, the solid medium may be sand, soil, cultivated soil, coconut fiber or any combination thereof.

According to the above method for cultivating a low potassium content vegetable, the dosage form of the first fertilizer composition and the second fertilizer composition described above may each independently be in a liquid form, a solid form or a combination thereof, and the foregoing The solid form may be selected from the group consisting of a powder, a wettable powder, a wettable granule, a flaky granule, a lozenge, a sustained release agent, and a controlled release agent.

According to the above cultivation method of the low potassium content vegetable, the vegetable propagation body may be selected from the group consisting of lettuce, Chinese cabbage, rape, Qingjiang, Komatsu, rape, spinach, spinach, red leeks and sweet potato leaves.

Thereby, the cultivation method of the low potassium content vegetable of the present invention supplies potassium through the first cultivation step, and the second cultivation step does not supply the two-stage cultivation method in which the nutrient supply of potassium is different, and the vegetable obtained by the cultivation can be obtained. The potassium content is greatly reduced, and the vegetables cultivated by the cultivation method of the low potassium content vegetables of the present invention can provide a healthier eating choice, and can be further applied to the diet control of kidney disease patients, so that they have good Market potential.

100‧‧‧Cultivation method for low potassium content vegetables

110‧‧‧Providing a vegetable propagule

120‧‧‧A seedling step

130‧‧‧A first cultivation step

140‧‧‧ Carry out a second cultivation step

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. The description of the drawings is as follows: Figure 1 shows a method for cultivating low potassium content vegetables according to an embodiment of the present invention. FIG. 2 is a graph showing the results of the potassium concentration test of the low potassium content vegetable of Example 1; FIG. 3 is a graph showing the nitrate concentration test result of the low potassium content vegetable of Example 1; The figure is a graph showing the results of the phosphorus concentration test of the low potassium content vegetable of Example 1.

Referring to Fig. 1, there is shown a flow chart of a method 100 for cultivating low potassium content vegetables according to an embodiment of the present invention. Planting of low potassium content vegetables The cultivation method 100 is cultivated in a solid medium, and the cultivation method 100 of the low potassium content vegetable comprises the step 110, the step 120, the step 130 and the step 140.

Step 110 is to provide a vegetable propagule. In detail, the vegetable propagule may be any plant material that can be used for the propagation of vegetable plants, wherein in the asexual reproduction, the vegetable propagule may be a cut, a leaf, or any other plant part of the plant. In sexual reproduction, vegetable propagules can be seeds. Preferably, in the cultivation method 100 of the low potassium content vegetable of the present invention, the vegetable propagule may be a seed or a cutting ear to facilitate subsequent cultivation and propagation. In addition, in the cultivation method 100 of the low potassium content vegetable of the present invention, the vegetable propagule may be selected from the group consisting of lettuce, Chinese cabbage, rape, Qingjiang, Komatsu, rape, spinach, spinach, red leeks and sweet potato leaves. Group, or other vegetables with higher potassium content, but the invention is not limited thereto.

Step 120 is a seedling step of planting the vegetable propagule in a solid medium and cultivating a seedling to obtain a vegetable seedling. In detail, planting the vegetable propagule in a solid medium is the optimum condition for the growth of the vegetable plant, and prevents the water stress caused by the long-term immersion of the root of the vegetable plant in the water to make it grow faster. And health. Preferably, the solid medium may be sand, soil, cultivated soil, coconut fiber or any combination thereof, and the seedling period may be 10 days to 20 days, but the invention is not limited thereto.

Step 130 is a first cultivation step of cultivating the aforementioned vegetable seedlings during a first cultivation period and applying a first fertilizer composition, wherein the first fertilizer composition comprises phosphoric acid, potassium and nitrogen, and is based on phosphoric acid Weight percentage, potassium is from 3 to 5 weight percent, and nitrogen is 4 weight percent The percentage is up to 7 weight percent. Preferably, the first cultivation period may be 10 days to 20 days, and in the first fertilizer composition, based on 1 weight percent of phosphoric acid, potassium may be 3.7 weight percent to 4.5 weight percent, and nitrogen may be 5.5 weight percent to 6.5 weight percent.

Step 140 is a second cultivation step of cultivating the vegetable seedlings cultivated by the first cultivation step during a second cultivation period and applying a second fertilizer composition to obtain a low potassium content vegetable, wherein the second fertilizer combination The composition comprises phosphoric acid, nitrogen, calcium and magnesium, and is 1 weight percent based on phosphoric acid, 7.5 weight percent to 10 weight percent nitrogen, 7.5 weight percent to 9.5 weight percent calcium, and 1.5 weight percent to 4 weight percent magnesium. Preferably, the second cultivation period may be 14 days to 30 days, and in the second fertilizer composition, based on 1 weight percent of phosphoric acid, nitrogen may be 8 weight percent to 9.5 weight percent, and calcium may be 8 weight percent to 9 weight percent, magnesium may range from 2 weight percent to 3.5 weight percent. In detail, the cultivation period of each vegetable differs depending on the growth of each vegetable, and the period of using the first fertilizer composition is about 1/2 to 1/3 of the period during which the second fertilizer composition is used, for example, in the practice of the present invention. As shown in the example, the period during which the first fertilizer composition is applied in the first cultivation period of Qingjiang cuisine may be about 10 to 20 days, and the period during which the second fertilizer composition is applied in the second cultivation period may be about 14 to 30 days.

Preferably, in the cultivation method 100 of the low potassium content vegetable of the present invention, the first fertilizer composition and the second fertilizer composition may each independently be in a liquid form, a solid form or a combination thereof, wherein the liquid form may be However, it is not limited to liquid agent (AL), solution, etc., and the solid form may be, but not limited to, powder, wettability A powder, a wettable granule, a flaky granule, a lozenge, a sustained release agent, etc., and the type of the first fertilizer combination or the second fertilizer combination may be adjusted as needed.

In detail, by adjusting the supply of nutrients in the plant cultivation process and the proportion of each nutrient component, the final growth state, nutrient composition and yield of the plant will be further affected, and the demand for potassium in the growth process of the plant is very high. And potassium is an indispensable inorganic nutrient component in the growth of plant roots, the regulation of water and the development of disease resistance, in the first cultivation step of the cultivation method 100 of the low potassium content vegetable of the present invention, The first fertilizer composition comprises potassium to provide potassium ions necessary for the growth of vegetable seedlings, and the second fertilizer composition in the second cultivation step does not contain potassium, but is replaced by other elements such as calcium and magnesium. Reduce the accumulation of potassium in vegetables under the premise of maintaining normal plant growth.

Therefore, after the cultivation of the step 110, the step 120, the step 130, and the step 140, the potassium content of the low potassium content vegetable cultivated by the cultivation method 100 of the low potassium content vegetable of the present invention is the potassium content of the vegetable which has not passed the low potassium content. The cultivation method 100 cultivates 30% to 60% of the potassium content of one of the vegetables, which will provide a healthier dietary choice and can be further applied to the diet control of kidney patients, so that it has a good market potential. Furthermore, the nitrate content of the low potassium content vegetable cultivated by the cultivation method 100 of the low potassium content vegetable of the present invention may be lower than the nitrate content of the vegetable cultivated by the cultivation method of the low potassium content vegetable of the present invention. The breadth of applications is even higher.

The present invention will be further exemplified in the following specific examples to facilitate the general knowledge of the field to which the present invention pertains, without excessive interpretation and The invention is fully utilized and practiced in the context of the experiment. However, the reader should understand that these practical details are not intended to limit the invention, that is, in some of the experimental examples of the present invention, these practical details are not necessary, but are used to illustrate how to implement the present invention. Materials and methods.

<Test example> 1. Cultivation of low potassium content vegetables by the cultivation method of low potassium content vegetables of the present invention

In the present experiment, the cultivation method of the low potassium content vegetable of the present invention is carried out by using the Qingjiang vegetable seed as the vegetable propagule in the above step 110 to further detect and explain the cultivation method using the low potassium content vegetable of the present invention. Potassium content of cultivated low potassium content vegetables and other elements.

In terms of experiments, first, the seeds of Qingjiang vegetables will be implanted into the plugs containing the peat soil as a solid medium, and the seedlings will be planted in the greenhouse for 10 to 20 days to the long roots, and then the seedlings containing the roots will be further transplanted to contain Planting in a culture dish of sand as a solid medium for subsequent cultivation.

Next, a first cultivation step is carried out, wherein the seedlings of the Qingjiang vegetable in the culture dish are cultivated in the net room for 12 days at room temperature, and the first fertilizer composition is applied in combination, wherein the first fertilizer composition is a liquid fertilizer, and The application is carried out by drip irrigation, and in the first fertilizer composition, based on 1 wt% of phosphoric acid, potassium is 3.7 wt% to 4.5 wt%, and nitrogen is 5.5 wt% to 6.5 wt% to provide seedling growth of Qingjiangca seedlings. The nutrients required for nitrogen, phosphorus and potassium. After completing the first cultivation step of cultivating the first fertilizer composition for 12 days, the Qingjiang vegetable seedlings will be combined with the second without potassium. The fertilizer composition is cultivated for 18 days for the second cultivation step, wherein the second fertilizer composition is a liquid fertilizer and applied by drip irrigation, and in the second fertilizer composition, based on 1 weight percent of phosphoric acid and 8 weight of nitrogen The percentage is 9.5 weight percent, the calcium is 8 weight percent to 9 weight percent, and the magnesium is 2 weight percent to 3.5 weight percent. After completing the second cultivation step, the Qingjiang vegetable seedlings will grow into a low potassium content Qingjiang vegetable, and the low potassium content Qingjiang vegetable of the above Example 1 will be further used to analyze the potassium content, the nitrate content and the phosphorus content.

In addition, the experiment further comprises a comparative example 1 which is cultivated for 30 days in the first fertilizer composition described above (i.e., 12 days of the first cultivation step and 18 days of the second cultivation step described above) until the harvest. The potassium content and other element contents of the vegetables cultivated by the cultivation method of the low potassium content vegetable cultivated by the cultivation method of the low potassium content of the present invention and the cultivation method of the low potassium content vegetable of the present invention are compared.

2. Detection of potassium content of low potassium content vegetables cultivated by the cultivation method of low potassium content vegetables of the present invention

In the analysis of the potassium content of the low potassium content vegetable of Example 1 and the potassium content of the vegetable of Comparative Example 1, the whole fertilizer test method AFS2130-1 of the Agricultural Fertilizer Standards (AFS) test method was used to test The difference in potassium content between the low potassium content vegetables of Example 1 and the vegetables of Comparative Example 1 was confirmed.

Please refer to Fig. 2, which is a graph showing the results of potassium concentration test of the low potassium content vegetable of Example 1. As shown in Fig. 2, the low potassium content of Example 1 The potassium content of the 100g vegetable sample was 195.32±14.11 mg, which was significantly lower than the potassium content of the 100 g vegetable sample of Comparative Example 1 was 398.33±43.43 mg, indicating that the cultivation method of the low potassium content vegetable of the present invention was passed through The cultivation step supplies potassium, and the second cultivation step does not supply the two-stage cultivation method in which the nutrient supply of potassium is different, and the vegetable having low potassium content can be effectively cultivated, so that it can be further applied to the diet control of the kidney disease patient. Make it have a good market potential.

3. Detection of nitrate content of low potassium content vegetables cultivated by the cultivation method of low potassium content vegetables of the present invention

In the present experiment, the nitrate content of the vegetable of the low potassium content of the first embodiment and the vegetable of the comparative example 1 was further examined to confirm that the cultivation method of the low potassium content vegetable of the present invention was cultivated in the case where the potassium content was lowered. Whether the nitrate content of low potassium content vegetables changes. In the present experiment, the nitrate content was examined by ion chromatography on the nitrate in the sample to confirm the difference in the nitrate content of the vegetable of the low potassium content of Example 1 and the vegetable of Comparative Example 1.

Please refer to FIG. 3, which is a graph showing the results of the nitrate concentration test of the low potassium content vegetable of Example 1. As shown in Fig. 3, the nitrate content of the 100 g vegetable sample of the low potassium content vegetable of Example 1 was 525.61±77.89 mg, which was significantly lower than the nitrate content of the 100 g vegetable sample of Comparative Example 1 of 850.06±113.19. Mg, which shows that the cultivation method of the low potassium content vegetable of the present invention supplies potassium through the first cultivation step, and the second cultivation step does not supply the nutrient supply of potassium differently in the two-stage cultivation method, and can be effectively cultivated to obtain potassium. The vegetable with lower content, while the potassium content is reduced, the nitrate content in the vegetable does not increase correspondingly, so that the low potassium content vegetable cultivated by the cultivation method of the low potassium content vegetable of the invention is used. Security is even better. Furthermore, at present, although there is no limit on the content of nitrate or nitrite in vegetables in China and the United States, the content of nitrate or nitrite in vegetables is too high, which has risks for consumers, especially for children or Pregnant women should pay more attention to their daily intake (ADI) to ensure the use of health. The low potassium content vegetables cultivated by the cultivation method of the low potassium content vegetables of the present invention have excellent potential for application in related markets.

In addition, since the cultivation method of the low potassium content vegetable of the present invention uses the first fertilizer composition and the second fertilizer composition having different distribution ratios in the first cultivation step and the second cultivation step, respectively, not only does the compensatory effect occur. Increasing the content of nitrate or nitrite in vegetables has the effect of lowering the content of nitrate or nitrite, and the application method of the low potassium content vegetable of the invention is more widely used.

4. Detection of phosphorus content of low potassium content vegetables cultivated by the cultivation method of low potassium content vegetables of the present invention

In the present experiment, the phosphorus content of the vegetable of the low potassium content of Example 1 and the vegetable of Comparative Example 1 was further examined to confirm that the cultivation of the low potassium content vegetable of the present invention was low in the case where the potassium content was lowered. Whether the potassium content of the potassium content of the vegetable changes. In this experiment, the phosphorus content was checked by the method of agricultural fertilizer standard test method for the total phosphoric anhydride test method AFS2120-1. The difference between the phosphorus content of the low potassium content vegetable of Example 1 and the vegetable of Comparative Example 1 was confirmed.

Please refer to Fig. 4, which is a graph showing the results of the phosphorus concentration test of the low potassium content vegetable of Example 1. As shown in Fig. 4, the phosphorus content of the 100 g vegetable sample of the low potassium content vegetable of Example 1 was 24.22 ± 3.51 mg, which was significantly lower than the phosphorus content of the 100 g vegetable sample of Comparative Example 1 was 30.58 ± 3.51 mg. The method for cultivating the low potassium content vegetable of the present invention provides potassium through the first cultivation step, and the second cultivation step does not supply the nutrient supply of potassium to the two-stage cultivation method, and can be effectively cultivated to obtain vegetables having a low potassium content. However, when the potassium content is lowered, the phosphorus content in the vegetables does not increase correspondingly, so that the safety of the low potassium content vegetables cultivated by the cultivation method of the low potassium content vegetables of the present invention is further improved, and has Excellent market potential.

In addition, although not shown, the sodium content of the low potassium content vegetable of Example 1 and the vegetable of Comparative Example 1 was further tested by the sodium test method AFS2902-1 of the Agricultural Fertilizer Standard Test Method to confirm the low potassium of Example 1. The difference in sodium content between the vegetable content and the vegetable of Comparative Example 1. The test results showed that the sodium content of the low potassium content vegetable of Example 1 had a slight increase compared with the sodium content of the vegetable of Comparative Example 1, but there was no statistical difference, indicating that the present invention The cultivation method of the low potassium content vegetable is supplied with potassium through the first cultivation step, and the second cultivation step does not supply the two-stage cultivation method in which the nutrient supply of potassium is different, and the vegetable having a low potassium content can be effectively cultivated, and the potassium content is obtained. At the same time of reduction, the sodium content in the vegetables will not increase significantly, compared with the low potassium content vegetables which are cultivated by hydroponic cultivation. The nutrient composition with higher sodium content has the advantage of less inorganic minerals, which in turn makes the use of low potassium content vegetables cultivated by the cultivation method of the low potassium content vegetables of the invention greatly improved, and has an excellent market. potential.

In summary, the cultivation method of the low potassium content vegetable of the present invention supplies potassium through the first cultivation step, and the second cultivation step does not supply the two-stage cultivation method in which the nutrient supply of potassium is different, and the adjustment of the plant cultivation process The supply of nutrients and the ratio of each nutrient component can greatly reduce the potassium content of the vegetables cultivated, and the vegetables cultivated by the cultivation method of the low potassium content vegetables of the present invention can provide healthier people. Dietary choices can be further applied to the dietary control of patients with kidney disease, so that they have good market potential.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

Claims (6)

The invention relates to a method for cultivating a low potassium content vegetable, which is cultivated by a solid medium, and the cultivation method of the low potassium content vegetable comprises: providing a vegetable propagule; performing a seedling step, which is to plant the vegetable propagule During the cultivation of the solid medium, a vegetable seedling is obtained, wherein the seedling period is 10 days to 20 days; and a first cultivation step is carried out, wherein the vegetable seedling is cultivated during the first cultivation period and a a first fertilizer composition, wherein the first fertilizer composition comprises phosphoric acid, potassium, and nitrogen, and based on the phosphoric acid is 1 weight percent, the potassium is 3 weight percent to 5 weight percent, and the nitrogen is 4 weight percent to 7 weight percent And the first cultivation period is 10 days to 20 days; and performing a second cultivation step of cultivating the vegetable seedlings cultivated through the first cultivation step during a second cultivation period and applying a second fertilizer composition a low potassium content vegetable, wherein the second fertilizer composition comprises phosphoric acid, nitrogen, calcium and magnesium, and based on the phosphoric acid is 1 weight percent, the nitrogen is 7.5 weight percent The calcium is from 7.5 weight percent to 9.5 weight percent, the magnesium is from 1.5 weight percent to 4 weight percent, and the second cultivation period is from 14 days to 30 days; wherein the low potassium content vegetable is one to 10 weight percent The potassium content is 30% of the potassium content of one of the vegetables cultivated without the cultivation method of the low potassium content to 60%, and the nitrate content of the low potassium content vegetable is lower than the nitrate content of the vegetable cultivated by the cultivation method without the low potassium content vegetable. The method for cultivating a low potassium content vegetable according to claim 1, wherein the first fertilizer composition is 1 wt% based on the phosphoric acid, and the potassium is 3.7 wt% to 4.5 wt%, and the nitrogen is 5.5. Weight percentage to 6.5 weight percent. The method for cultivating a low potassium content vegetable according to claim 1, wherein the second fertilizer composition is 1% by weight based on the phosphoric acid, and the nitrogen is 8 to 9.5 weight percent, and the calcium is 8 The weight percentage is up to 9 weight percent, and the magnesium is from 2 weight percent to 3.5 weight percent. The method for cultivating a low potassium content vegetable according to claim 1, wherein the solid medium is sand, earth, coconut fiber or any combination thereof. The method for cultivating a low potassium content vegetable according to claim 1, wherein one of the first fertilizer composition and one of the second fertilizer composition are independently a liquid type and a solid type. state Or a combination thereof, and the solid form is selected from the group consisting of a powder, a wettable granule, a flaky granule, a tablet, a sustained release agent, and a controlled release agent. The method for cultivating a low potassium content vegetable according to the first aspect of the patent application, wherein the vegetable breeding system is selected from the group consisting of lettuce, Chinese cabbage, rapeseed, Qingjiang, small pine, rape, water spinach, spinach, red leeks and sweet potato leaves. The group that makes up.