Asparagus seed germination temperature conditions
Asparagus seed germination to 5 °C as the minimum limit, the temperature dropped below 5 °C below ground temperature, almost no germination, germination rate and germination potential is significantly lower than 15 °C. Therefore, in areas with low temperatures, it takes quite a long time to germinate after sowing in early spring. Care must be taken to take certain measures before sowing, and to conduct certain insulation after sowing. The optimum temperature for seed germination is 20-25°C, and the germination rate can reach more than 90%. The immersed seed was placed in an environment of 25°C, germination started about 3 days, and most of the seeds germinated after 10 days. At 25-30°C, the seed germination started earlier, but the germination time prolonged and the germination potential was worse than 20-25°C. The seed germination rate and germination potential decreased significantly above 30°C, and germination stopped at above 35°C. Asparagus seeds germinating power and germination rate are very low at higher temperatures, which may be related to the rapid decrease of a-amylase activity with the prolongation of germination time at high temperature. In a certain temperature range, the germination rate of warming germination is better than that of constant temperature germination, especially the low temperature effect of day and night. Using a variable temperature germination treatment at 25°C during the day and 20°C at night, the germination rate can be as high as 98%.
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