Soilless culture high-yield planting method for herba epimedii

Abstract

The invention provides a soilless culture high-yield planting method for herba epimedii, and belongs to the technical field of plant planting. The method comprises the following steps that under the condition that illumination is smaller than or equal to 20000 lux, a soilless culture substrate is used for artificially planting herba epimedii, according to the substrate humidity requirement and the root growth condition of the herba epimedii, an irrigation scheme is set, the feed-discharge ratio in different growth periods is adjusted, meanwhile, the water and fertilizer formula proportion is adjusted by combining detection of the plant nutrient content and detection of the feed-discharge ratio, and then the herba epimedii is planted. The survival rate and the technical yield of epimedium are improved. Compared with the prior art, the method has the advantages that the survival rate can be increased by 20%, the seedling recovery time is shortened by more than 15 days, the number of branches can be increased by 30% and the size of leaves can be increased by 20% within the same time, and the yield is increased by 50% from a field to an object cultivation technology by integrating the superior yields.

Description

Technical Field

[0001] The invention belongs to the technical field of plant planting, and in particular relates to a soilless culture high-yield planting method for epimedium. Background Art

[0002] Currently, the epimedium circulating in the market is mainly wild, and the artificial cultivation capacity is less than 5%. With violent picking / aging population / high labor costs and inconvenience in picking (wild epimedium grows on the shady slopes of deep mountains), the wild supply is declining year by year, and artificial cultivation replacing wild supply is an inevitable trend.

[0003] There are two mainstream artificial planting methods, namely, simulated wild planting under the forest and field shade planting. The advantage of simulated wild planting under the forest is low cost, but the disadvantages are small number of plants, slow seedlings, small growth, low yield, long payback period, etc. Field shade net planting effectively solves the problem of small number of plants, but it also has problems such as slow seedlings, low yield, and long payback period.

[0004] This is mainly due to the fact that Epimedium is a fibrous root crop, and the root growth has a suitable range for soil physics and chemistry such as soil particle size and root bulk density. However, the simulated wild planting under the forest and the field shade net planting generally have a high proportion of clay particles, a high content of invalid soil water (hygroscopic water), and a low content of effective soil water (capillary water). The soil can absorb less water, and the soil bulk density is relatively large, the soil is relatively compact, and there is insufficient space for root growth, which leads to slow root growth and difficulty in absorbing water. The survival rate of transplanted plants is low and slow. In addition, there is no better way to supplement fertilizers for artificial planting, so the plant growth is low, the growth cycle is long, the yield is low, and the return cycle is long. Summary of the invention

[0005] The present invention provides a high-yield soilless cultivation method for epimedium. Compared with the prior art, the survival rate of the method can be increased by 20%, the seedling acclimatization time can be shortened by more than 15 days, and within the same time, the number of branches can be increased by 30%, and the leaf size can be increased by 20%. Combining the above advantages, the yield is increased by 50% from field to field cultivation technology.

[0006] In order to achieve the above object, the present invention provides a soilless culture high-yield planting method of epimedium, comprising the following steps:

[0007] Under the condition of light ≤20000lux, epimedium was artificially planted using soilless culture medium. According to the humidity requirement of the medium and the root growth of epimedium, the irrigation plan was set and the input-output ratio was adjusted in different growth periods. At the same time, the water-fertilizer formula ratio was adjusted in combination with the detection of plant nutrient content and input-output ratio to improve the survival rate and technical yield of epimedium.

[0008] Preferably, the soilless cultivation substrate is composed of a volume ratio of 40%-75% peat: 10-25% perlite: 2-10% fine coconut husk: 2-10% vermiculite.

[0009] Preferably, when artificially planting epimedium, the height of the high ridge is ≥30 cm, the specification of the substrate bag is 30*30*40 cm, each substrate bag contains 20 L of substrate, 2 epimedium plants are planted in each bag, and the row spacing between plants is 25 cm.

[0010] As a preferred embodiment, the irrigation scheme is specifically set as follows:

[0011] Irrigation starts 1-2 hours after sunrise, when photosynthesis starts, the temperature rises above 15°C, transpiration starts to flourish, and the last irrigation ends 2 hours before sunset.

[0012] Among them, according to the system characteristics of water and fertilizer and the stable supply cycle, the interval period of the rotation irrigation group is set to 30-60 minutes.

[0013] Preferably, the irrigation amount each time is obtained according to the following method:

[0014] Calibrate the flow rate of the drop arrow in ml / s;

[0015] Transpiration & evaporation of a single shed on T day = T day liquid intake volume - T day liquid discharge volume;

[0016] According to the weather forecast, the irrigation start and end time of T+1, as well as the irrigation frequency, are revised:

[0017] Calculate the theoretical liquid volume ml at T+1:

[0018] Theoretical liquid inflow volume on day T+1 = transpiration & evaporation of single shed on day T / (1-target liquid inflow ratio);

[0019] Calculate T+1 theoretical single irrigation volume ml:

[0020] T+1 single liquid inflow volume = T+1 theoretical liquid inflow volume / T+1 irrigation times

[0021] Calculate the duration of a single irrigation:

[0022] Single irrigation duration = T + 1 single liquid volume ml / calibrated dripper flow / s

[0023] Configure water and fertilizer according to the irrigation plan and start irrigation for the day.

[0024] Preferably, one drop arrow is used for water and fertilizer application, and two drop arrows are inserted into each substrate bag.

[0025] Preferably, the target feed-discharge ratio is 15%-25%.

[0026] As a preferred method, the EC values ​​of the inlet and outlet liquids at different growth stages are set as follows:

[0027] In the seedling stage, the EC of the liquid is 0.5-0.7; in the flowering stage, the EC of the liquid is 0.7-0.9; in the leaf expansion stage, the EC of the liquid is 0.8-1.1;

[0028] During the seedling stage, the drainage EC is 0.9-1.2; during the flowering stage, the drainage EC is 1.2-1.6; during the leaf expansion period, the drainage EC is 1.35-1.8.

[0029] Preferably, the water-fertilizer formula is: 1-1.5kg of calcium ammonium nitrate, 0.1-0.5kg of ammonium sulfate, 0.2-1kg of potassium sulfate, 0.4-0.8kg of magnesium sulfate, 0.3-0.8kg of potassium dihydrogen phosphate, 0.1-0.3kg of DPTA iron, 0.01-0.02kg of borax, 0.005-0.01kg of manganese sulfate, 0.0005-0.0015kg of zinc sulfate, 0.0002-0.001kg of copper sulfate, and 0.0001-0.001kg of sodium molybdate.

[0030] Preferably, the concentration of the water-fertilizer formula is adjusted by detecting the range of drainage EC. If the drainage EC is within the set range, the formula is used normally for application. If the drainage EC is too low, the original basic concentration is increased by 25%. If the drainage concentration is too high, the original concentration is decreased by -25%. If the drainage EC is continuously abnormal, the inlet concentration is corrected by detecting the nutrient element content of the drainage and the nutrient content range of the epimedium plant. If the detected element content is insufficient, the basic concentration is increased by 25%. On the contrary, if the detected element content is excessive, the basic concentration is decreased by -25%. The concentration unit is mmol / L.

[0031] Compared with the prior art, the advantages and positive effects of the present invention are:

[0032] Compared with the imitation under-forest planting and field shade net planting, the soilless cultivation water-fertilizer planting method provided by the present invention increases the survival rate of conventional soil planting from 30-70% to more than 95%, and the seedling acclimatization is shortened from 20-40 days of conventional planting to about 10-15 days, and within the same 6-month period, the number of branches can be increased from 30-40 branches of conventional planting to 40-50 branches, and the average leaf length during the same period increases from 4-6cm to 7-8.5cm. Combining the above advantages, from conventional planting to soilless cultivation water-fertilizer technology planting, the average fresh weight of a single plant is increased from 8-13g to 16-20g, and the yield is increased by nearly 30-50%. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a scene diagram of the growth of epimedium in the existing technology imitating the understory planting method;

[0034] Figure 2 A field diagram of the growth of epimedium in the soilless culture high-yield planting method provided by an embodiment of the present invention;

[0035] Figure 3 This is a field picture of the growth of epimedium in the field shade planting method in the prior art. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] Under the condition of light ≤20000lux, epimedium was artificially planted using soilless culture medium. According to the moisture requirement of the medium and the root growth of epimedium, the irrigation plan was set and the input-output ratio was adjusted in different growth periods. At the same time, the water-fertilizer formula ratio was adjusted in combination with the detection of plant nutrient content and input-output ratio.

[0039] Specifically, the soilless culture substrate is composed of peat (75%), perlite (10%), fine coconut bran (7.5%) and vermiculite (7.5%) in a volume ratio. When artificially planting epimedium, the height of the high ridge is ≥30 cm, the substrate bag specification is 30*30*40 cm, each substrate bag contains 20 L of substrate, and each bag is planted with 2 epimedium plants, and the row spacing between plants is 25 cm.

[0040] During the seedling stage, the irrigation plan is set as follows:

[0041] Irrigation starts at 8:30 in the morning, photosynthesis starts, the temperature rises above 15°C, transpiration starts to be vigorous, and the last irrigation is at 14:30 in the afternoon;

[0042] Among them, according to the system characteristics of water and fertilizer and the stable supply cycle, the interval period of the rotation irrigation group is set to 60 minutes;

[0043] The irrigation volume for each irrigation is obtained as follows:

[0044] The flow rate of the calibrated drop arrow is 0.27ml / s;

[0045] Single shed T day transpiration & evaporation (250ml) = T day liquid intake volume (300ml) - T day liquid discharge volume (50ml);

[0046] According to the weather forecast (sunny), modify tomorrow's irrigation start and end time, as well as the number of irrigations:

[0047] Calculate the theoretical liquid volume ml at T+1:

[0048] Theoretical liquid intake volume on T+1 day = 250 ml / (1-25%) = 330 ml;

[0049] Calculate T+1 theoretical single irrigation volume ml:

[0050] T+1 single injection volume = T+1 theoretical injection volume (330 ml) / T+1 irrigation times (7 times) = 47 ml

[0051] Calculate the duration of a single irrigation:

[0052] Single irrigation duration = T + 1 single liquid volume (47ml) / calibrated dripper flow rate / s (0.27ml / s) = 87s

[0053] Configure water and fertilizer according to the irrigation plan and start the day's irrigation. Use a 1:4 drop arrow to apply water and fertilizer. The target feed-row ratio is 25%.

[0054] During the rapid growth period, the inlet EC was set to 0.5, and the outlet EC was controlled at 0.6-0.8 (within the range of 1.2-1.6 times the inlet EC).

[0055] The water fertilizer formula is: 1.3kg calcium ammonium nitrate, 0.15kg ammonium sulfate, 0.5kg potassium sulfate, 0.43kg magnesium sulfate, 0.58kg potassium dihydrogen phosphate, 0.1kg DPTA iron, 0.01kg borax, 0.005kg manganese sulfate, 0.001kg zinc sulfate, 0.0005kg copper sulfate, 0.0001kg sodium molybdate. If the drainage EC is controlled within the ideal range in daily testing, the formula is used normally for application. If the drainage EC is too low, it is +25% on the original basic concentration. If the drainage concentration is too high, it is -25% on the original basis. If the drainage EC continues to be abnormal, the inlet concentration is corrected by testing the nutrient elements of the drainage and the nutrient content range of the epimedium plant. If the detected element content is insufficient, it is +25% on the basic concentration. On the contrary, if the detected element content is surplus, the concentration is -25% on the basic concentration.

[0056] like Figure 2As shown, the survival rate of Epimedium planted by the above-mentioned soilless culture water and fertilizer planting method is 95% after 6 months of planting, and the seedling is about 12 days. In addition, within the same 6-month period, the number of branches can reach 45 branches, and the average leaf length during the same period is 7.5cm. Combining the above advantages, the average fresh weight of a single plant is increased to 16g, and the yield is increased by nearly 30%. Among them, the branch measurement method is used to determine the number of branches emitted from the spores, and the leaf length measurement method is used to determine the distance from the base of the leaf to the tip of the leaf. The following embodiments and comparative examples are the same here.

[0057] Example 2

[0058] Under the condition of light ≤20000lux, epimedium was artificially planted using soilless culture medium. According to the moisture requirement of the medium and the root growth of epimedium, the irrigation plan was set and the input-output ratio was adjusted in different growth periods. At the same time, the water-fertilizer formula ratio was adjusted in combination with the detection of plant nutrient content and input-output ratio.

[0059] Specifically, the soilless culture medium consists of peat (60%), perlite (25%), fine coconut husk (7.5%) and vermiculite (7.5%) in a volume ratio.

[0060] When artificially planting epimedium, the height of the high ridge should be ≥30cm, the specifications of the substrate bag should be 30*30*40cm, each substrate bag should contain 20L of substrate, 2 epimedium plants should be planted in each bag, and the row spacing between plants should be 25cm.

[0061] During the flowering period, the irrigation plan is set as follows:

[0062] Irrigation starts at 9:00 a.m., photosynthesis starts, the temperature rises above 15°C, transpiration starts to be vigorous, and the last irrigation is at 13:30 p.m.

[0063] Among them, according to the system characteristics of water and fertilizer and the stable supply cycle, the interval period of the rotation irrigation group is set to 60 minutes.

[0064] The irrigation volume for each irrigation is obtained as follows:

[0065] The flow rate of the calibrated drop arrow is 0.27ml / s;

[0066] Single shed T day transpiration & evaporation (250ml) = T day liquid intake volume (320ml) - T day liquid discharge volume (70ml);

[0067] According to the weather forecast (sunny), modify tomorrow's irrigation start and end time, as well as the number of irrigations:

[0068] Calculate the theoretical liquid volume ml at T+1:

[0069] Theoretical liquid intake volume on T+1 day = 250 ml / (1-20%) = 312.5 ml;

[0070] Calculate T+1 theoretical single irrigation volume ml:

[0071] T+1 single injection volume = T+1 theoretical injection volume (312.5 ml) / T+1 irrigation times (5 times) = 62.5 ml

[0072] Calculate the duration of a single irrigation:

[0073] Single irrigation duration = T+1 single liquid inlet volume (62.5 ml) / calibrated dripper flow rate / s (0.27 s) = 109 s.

[0074] Configure water and fertilizer according to the irrigation plan and start the day's irrigation. Use a one-point four-drop arrow for water and fertilizer application, inserting two drop arrows into each substrate bag. The target row-in ratio is 20%.

[0075] During the flowering period, the liquid inlet EC was set to 0.8 (0.5 during the seedling period), and the drainage control was the same as in Example 1.

[0076] The water fertilizer formula is: 1.5kg calcium ammonium nitrate, 0.3kg ammonium sulfate, 0.5kg potassium sulfate, 0.45kg magnesium sulfate, 0.6kg potassium dihydrogen phosphate, 0.1kg DPTA iron, 0.01kg borax, 0.005kg manganese sulfate, 0.001kg zinc sulfate, 0.0005kg copper sulfate, 0.0001kg sodium molybdate. The formula adjustment method is the same as in Example 1.

[0077] After 6 months of planting using the above soilless culture water and fertilizer planting method, the survival rate of the planted epimedium is 95%, the seedling is about 10 days, and the number of branches can reach 45 branches in the same 6 months, and the average leaf length during the same period is 8cm. Combining the above advantages, the average fresh weight of a single plant is increased to 17g, and the yield is increased by nearly 40%.

[0078] Example 3

[0079] Under the condition of light ≤20000lux, epimedium was artificially planted using soilless culture medium. According to the moisture requirement of the medium and the root growth of epimedium, the irrigation plan was set and the input-output ratio was adjusted in different growth periods. At the same time, the water-fertilizer formula ratio was adjusted in combination with the detection of plant nutrient content and input-output ratio.

[0080] Specifically, the soilless culture medium consists of peat (65%), perlite (25%), fine coconut husk (5%) and vermiculite (5%) in a volume ratio.

[0081] When artificially planting epimedium, the height of the high ridge should be ≥30cm, the specifications of the substrate bag should be 30*30*40cm, each substrate bag should contain 20L of substrate, 2 epimedium plants should be planted in each bag, and the row spacing between plants should be 25cm.

[0082] During the leaf expansion period, the irrigation plan is as follows:

[0083] Irrigation starts at 8:00 a.m., photosynthesis starts, the temperature rises above 15°C, transpiration starts to be vigorous, and the last irrigation is at 15:00 p.m.

[0084] Among them, according to the system characteristics of water and fertilizer and the stable supply cycle, the interval period of the rotation irrigation group is set to 60 minutes.

[0085] The irrigation volume for each irrigation is obtained as follows:

[0086] The flow rate of the calibrated drop arrow is 0.27ml / s;

[0087] Single shed T day transpiration & evaporation (260ml) = T day liquid intake volume (350ml) - T day liquid discharge volume (90ml);

[0088] According to the weather forecast (sunny), modify tomorrow's irrigation start and end time, as well as the number of irrigations:

[0089] Calculate the theoretical liquid volume ml at T+1:

[0090] Theoretical liquid intake volume on T+1 day = 260 ml / (1-25%) = 346 ml;

[0091] Calculate T+1 theoretical single irrigation volume ml:

[0092] T+1 single injection volume = T+1 theoretical injection volume (346 ml) / T+1 irrigation times (8 times) = 43 ml

[0093] Calculate the duration of a single irrigation:

[0094] Single irrigation duration = T + 1 single liquid volume (43ml) / calibrated dripper flow rate / s (0.27s) = 75s

[0095] Configure water and fertilizer according to the irrigation plan and start irrigation for the day.

[0096] Use a one-fourth dropper for water and fertilizer application, insert two dropper arrows into each substrate bag. The target feed-row ratio is 20%.

[0097] During the leaf expansion growth period, the liquid inlet EC was set to 1 (the liquid inlet EC in the seedling stage was 0.5, and the liquid inlet EC in the flowering stage was 0.8), and the drainage control was the same as in Example 1.

[0098] The water fertilizer formula is: 1.5kg calcium ammonium nitrate, 0.3kg ammonium sulfate, 0.6kg potassium sulfate, 0.45kg magnesium sulfate, 0.7kg potassium dihydrogen phosphate, 0.1kg DPTA iron, 0.01kg borax, 0.005kg manganese sulfate, 0.001kg zinc sulfate, 0.0005kg copper sulfate, 0.0001kg sodium molybdate. The formula adjustment method is the same as in Example 1.

[0099] After 6 months of planting using the above soilless culture water and fertilizer planting method, the survival rate of the planted epimedium is 96%, the seedlings take about 10 days to grow, and in the same 6 months, the number of branches can reach 48 branches, and the average leaf length during the same period is 7.8cm. Combining the above advantages, the average fresh weight of a single plant is increased to 18g, and the yield is increased by nearly 45%.

[0100] Comparative Example 1: Existing understory planting

[0101] The existing under-forest planting is mostly under pine forests. The soil is mostly under-forest soil. It is generally required to be planted along the slope, with a row spacing of 25cm between plants. The water and fertilizer irrigation plan is: apply 1 ton of organic fertilizer + 20kg of compound fertilizer per mu during the planting period, then plant, and then rely on rainwater for irrigation. Add organic fertilizer and compound fertilizer again after harvesting.

[0102] like Figure 1 As shown, after 6 months of planting using the existing understory planting method, the survival rate of Epimedium planted was 50%, the seedling survival time was shortened to about 40, and within the same 6-month period, the number of branches was 30 branches, the average leaf length during the same period was 4.5 cm, and the average fresh weight of a single plant was about 10 g.

[0103] Comparative Example 2: Existing field sunshade planting

[0104] like Figure 3 As shown, most of the existing field shade planting is done in the open air in the field, with 75% shade nets. The soil is mostly forest soil, and loam is more suitable. Ridge planting, the row spacing between plants is mostly 25cm. The water and fertilizer irrigation plan is: apply 1 ton of organic fertilizer + 20kg of compound fertilizer per mu during the planting period, then plant, and then rely on rainwater irrigation. If conditions permit, spray to supplement water and fertilizer appropriately. Add organic fertilizer and compound fertilizer again after harvesting.

[0105] After 6 months of planting using the existing field shade planting method, the survival rate of the planted epimedium was 70%, the seedling growth period was shortened to about 35 days, and within the same 6-month period, the number of branches was 35 branches, the average leaf length during the same period was 5.5 cm, and the average fresh weight of a single plant was about 12 g.

Claims

1. A soilless culture high-yield planting method for Epimedium, characterized in that: The following steps are involved: Under the condition of light ≤20000lux, epimedium was artificially planted using soilless culture medium. According to the humidity requirement of the medium and the root growth of epimedium, the irrigation plan was set and the input-output ratio was adjusted in different growth periods. At the same time, the water-fertilizer formula ratio was adjusted in combination with the detection of plant nutrient content and input-output ratio to improve the survival rate and technical yield of epimedium.

2. The soilless culture high-yield planting method according to claim 1, characterized in that: The soilless cultivation substrate is composed of 40%-75% peat: 10-25% perlite: 2-10% fine coconut bran: 2-10% vermiculite in a volume ratio.

3. The soilless culture high-yield planting method according to claim 1, characterized in that: When artificially planting epimedium, the height of the high ridge should be ≥30cm, the specifications of the substrate bag should be 30*30*40cm, each substrate bag should contain 20L of substrate, 2 epimedium plants should be planted in each bag, and the row spacing between plants should be 25cm.

4. The soilless culture high-yield planting method according to claim 1, characterized in that: The specific irrigation scheme is as follows: Irrigation starts 1-2 hours after sunrise, when photosynthesis starts, the temperature rises above 15°C, transpiration starts to flourish, and the last irrigation ends 2 hours before sunset. Among them, according to the system characteristics of water and fertilizer and the stable supply cycle, the interval period of the rotation irrigation group is set to 30-60 minutes.

5. The soilless culture high-yield planting method according to claim 4, characterized in that: The irrigation volume for each irrigation is obtained as follows: Calibrate the flow rate of the drop arrow in ml / s; Transpiration & evaporation of a single shed on T day = T day liquid intake volume - T day liquid discharge volume; According to the weather forecast, the irrigation start and end time of T+1, as well as the irrigation frequency, are revised: Calculate the theoretical liquid volume ml at T+1: Theoretical liquid inflow volume on day T+1 = transpiration & evaporation of single shed on day T / (1-target liquid inflow ratio); Calculate T+1 theoretical single irrigation volume ml: T+1 single liquid inflow volume = T+1 theoretical liquid inflow volume / T+1 irrigation times Calculate the duration of a single irrigation: Single irrigation duration = T + 1 single liquid volume ml / calibrated dripper flow / s Configure water and fertilizer according to the irrigation plan and start irrigation for the day.

6. The soilless culture high-yield planting method according to claim 5, characterized in that: Use a one-to-four drop arrow for water and fertilizer application, inserting two drop arrows into each substrate bag.

7. The soilless culture high-yield planting method according to claim 5, characterized in that: The target entry-exit ratio is 15%-25%.

8. The soilless culture high-yield planting method according to claim 1, characterized in that: The EC values ​​of influent and drain fluid at different growth stages are set as follows: In the seedling stage, the EC of the liquid is 0.5-0.7; in the flowering stage, the EC of the liquid is 0.7-0.9; in the leaf expansion stage, the EC of the liquid is 0.8-1.1; During the seedling stage, the drainage EC is 0.9-1.2; during the flowering stage, the drainage EC is 1.2-1.6; during the leaf expansion period, the drainage EC is 1.35-1.

8.

9. The soilless culture high-yield planting method according to claim 8, characterized in that: The water and fertilizer formula is: 1-1.5kg of calcium ammonium nitrate, 0.1-0.5kg of ammonium sulfate, 0.2-1kg of potassium sulfate, 0.4-0.8kg of magnesium sulfate, 0.3-0.8kg of potassium dihydrogen phosphate, 0.1-0.3kg of DPTA iron, 0.01-0.02kg of borax, 0.005-0.01kg of manganese sulfate, 0.0005-0.0015kg of zinc sulfate, 0.0002-0.001kg of copper sulfate, and 0.0001-0.001kg of sodium molybdate.

10. The soilless culture high-yield planting method according to claim 8 or 9, characterized in that: The concentration of the water-fertilizer formula is adjusted by detecting the range of drainage EC. If the drainage EC is within the set range, the formula is used normally. If the drainage EC is too low, the original basic concentration is increased by 25%. If the drainage concentration is too high, the original concentration is reduced by 25%. If the drainage EC continues to be abnormal, the inlet concentration is corrected by detecting the nutrient element content of the drainage liquid and the nutrient content range of the Epimedium plant. If the detected element content is insufficient, the basic concentration is increased by 25%. Conversely, if the detected element content is excessive, the basic concentration is reduced by 25%.

Images