1. Knot hook: A round plastic petri dish is composed of an upper dish and a lower part. The inner diameter is 9 cm long, 9 cm wide and 1.5 cm high. It is round, colorless and transparent. The raw materials used are non-toxic plastics. When using, buckle the upper dish on the lower dish and place it in the hair box or germination room.
2. Performance: According to the test and actual application results, its performance is divided into 5 points. 1. Suitable for seed germination testing under constant temperature and variable temperature conditions. The experiment and 4 years of application practice show that under the conditions of 0-70 ° C constant temperature and 20-30 ° C variable temperature, the seeds are tested for germination, and the results obtained are consistent with round glass petri dishes. 2. Suitable for germination test of extra-large seeds, large, medium and small seeds and extra-small seeds. Each petri dish can hold 5 extra large seeds, 50 large seeds, 100 medium and small seeds and 100 extra small seeds. The germination test results were consistent with round glass petri dishes. 3. It is suitable to use multiple germination substrates as germination beds. Sand beds, paper beds, vermiculite beds, Zhenshuyan beds, gauze beds, etc. are used as germination beds. The seed germination test results are consistent with glass petri dishes. 4. No deformation, breakage or cracking. Under the conditions of 30-90% relative humidity at -70 ° C, repeated application for 4 years showed no signs of deformation, cracking and breaking. 5. Harmless to seeds and human body. The plastics used to make the round plastic petri dishes, under the temperature and humidity conditions of the seeds, the seeds germinated normally without any discomfort in the test and the actual application for 4 years, indicating no harm to the seeds and the body.