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The temperature of the light incubator was controlled at 25°C, and the paper bed and the sand bed were used respectively, and the four treatments were set on paper, paper, sand, and sand, and the seed was cleaned after coating (the water was coated at about 45°C. After soaking for 15 minutes, rinse with clean water) as a control. Seeds were not soaked, with 100 replicates per test and 4 replicates. Immerse the germinating paper bed with water and place the seeds evenly on the bed. Check the temperature and humidity every day and add water at the appropriate amount at any time. After the first number of days of counting was 4 days, the germination rate was calculated after the last number of days of counting was 10 days.
The germination rate of coated seeds was lower than that of cleaning seeds, the germination rate of paper beds was lower than that of sand beds, and the main reason for the lower germination rate on paper and sand was between paper and sand. The main reason was that the concentration of seed coating agents on sprout beds affected the embryos. To. Generally speaking, a layer of germinating paper is added on top of the coated seed when using the paper; when using the sand, the coated seeds should be kept at a certain distance. The spacing distance is generally five times the diameter of the cross-section of the seed. Reduce the concentration of seed coating agents on the germinating bed, reduce the poisoning of the seed coating agents on the embryos, and thus increase the germination rate of the coated seeds. In dealing with unsure of the coating seed germination test, using the method of germination between the paper or sand, at the same time, the cleaning species should also be set as a control to improve the accuracy of the test.
The optimum conditions for seed germination test of coated sunflower seeds are the inter- and sand-bud beds. The temperature of the light incubator is controlled at 25°C and the sand layer is covered with 1 cm. There is no special requirement for humidity. When the temperature was at 25°C, the seed oil sunflower seeds had a higher germination rate and the seedlings were robust. This temperature was close to the ambient temperature when the sunflower was sown, and the germination results could best reflect the emergence of the field. Especially when sunflower seed is in dormant state, it is best to use low temperature test. However, when the seed vigor is strong, the dormancy has been released and the test results are eager to produce test results, a 30°C high temperature method can be used, which can shorten the seedling emergence time and end the test ahead of schedule.
Study on the Influence Factors of Germination Rate of Coated Oil Sunflower Seeds by Illumination Incubator
Oil sunflower seeds germinate at temperatures between 20 and 30 degrees Celsius, which is the most suitable. In the temperature range, the higher the temperature, the faster the germination rate, but the high temperature will easily damage the young shoots, and the seedlings' adaptability to the environment will also be weakened. Caused an increase in malformed seedlings. What kind of environment is the most suitable environment for seed germination? This requires research and summary of seed germination conditions by means of light incubators and other related instruments.