RTK 208 Plant ecotoxicity tester

RTK 208 Plant ecotoxicity tester

Test principle: This method is used to evaluate the effects of application of test products to soil (or other suitable soil substrate) on the emergence and early growth of higher plants.

Brand: RTK

Model: RTK 208 Plant ecotoxicity tester

Land plant tests: seedling germination and seedling growth tests

Test principle

This method is used to evaluate the effects of application of test products to soil (or other suitable soil substrate) on seedling emergence and early growth of higher plants.

The seeds were planted in the soil treated with the test product and evaluated 14 to 21 days after the control group reached 50% seedling emergence. End measures are visible emergence rate, dry weight (or fresh weight) and, in some cases, seedling height, as well as evaluation of harmful effects visible on different parts of the plant. These measurements and observations were compared with untreated controls. Depending on the possible exposure route, the test product is mixed with soil (or possibly an artificial soil substrate) or sprayed on the soil surface to represent the potential exposure route of the chemical as accurately as possible. When the soil is mixed, a large amount of loose soil is mixed first, and then put into the pot, and the seeds of the selected plant species are planted in the soil. When applying surface medicine, first put the soil into a pot, plant the seeds well, and then spray. The test subjects (control and treated soil and seeds) are placed in an environment suitable for plant growth. This test may measure the dose-response curve depending on the purpose of the study, or single dose/ratio as a limit test. If a single dose/ratio test exceeds a certain toxicity level (for example, the observed effect is greater than X%), range screening tests are performed to determine the high and low limits of toxicity, followed by multiple dose tests to produce a dose-response curve. Appropriate statistical analysis methods were used to obtain the most sensitive parameters of the action concentration Ecx or effective application rate Erx(e.g. C25,ER25,EC50,ER50). The concentration of no action (NOEC) and the minimum action concentration (LOEC) can also be calculated.

The validity of the test
In order to ensure the effectiveness of the experiment, the control group must meet the following conditions: the emergence rate should not be less than 70%; Seedlings have no visible effects of plant toxins (such as discoloration, necrosis, wilt, deformities of leaves and stems), and individual species of plants have only normal variations in growth and morphology; During the experiment, the average survival rate of seedlings in the control group should be higher than 90%. The environmental conditions for the growth of specific varieties should be consistent, and their growing media should contain an equal amount of artificial soil substrate, supporting media or substrate of the same source.

Reference substance

Reference substance tests are performed periodically to confirm that the test performance and the response of specific plants and test conditions have not changed significantly over time. Alternatively, the performance of the test system can be evaluated in a specific laboratory using previously controlled bioassays or growth measurements, which can be used as an internal laboratory quality control measure.

Technological advantage

(1) Microcomputer full intelligent control system, powerful, strong anti-interference ability. Large screen LCD display mode, working parameters and running status display, intuitive and clear.
(2) The control panel adopts light-touch button design and humanized software design.
(3) The control system has data storage, memory and online query functions. In case of power failure, shutdown, and restart, the original working state can be continued, so as to ensure the normal operation of the equipment according to the program. Box temperature control adopts PID control mode based on computer fuzzy control theory, which has the characteristics of high control precision, good stability and small water consumption.
(4) The door is equipped with a good perspective of the switch window, no need to open the door can observe the situation in the box at any time.
(5) The inner liner is made of stainless steel, strong corrosion resistance, long service life and easy to clean.
(6) Advanced breeze circulation duct design, more uniform temperature. Multi-layer shelf in the work room with adjustable shelf height.
(7) Total volume: ≥650L.
(8) Temperature: 20-40℃, temperature uniformity: ≤±1℃.
(9) Humidity: 50~95%RH, stability ≤5%RH.
(10) Illumination: maximum 600 μE/m2/s.
(11) Power supply: 220V, 1100W(maximum cooling power).
(12) Appearance size: 850W*810D*2010H Weight: 240kg.


Configuration list
(1) Host: 1 set
(2) Blank soil: 1
(3) Cultivation basin: 1 set
(4) Operation kit: 1 set