What temperature is suitable for asparagus seed germination?

What temperature is suitable for asparagus seed germination? Please introduce that the lowest limit of asparagus seed germination is 5 ℃. When the ground temperature is below 5 ℃, there is almost no germination, and the germination rate and germination energy are obviously decreased when the ground temperature is below 15 ℃. Therefore, in areas with low temperature, it takes a long time to sprout after sowing in early spring, and attention must be paid to taking certain measures before sowing and certain heat preservation treatment after sowing. The most suitable temperature for vegetable seed germination is 20-25 ℃, and the germination rate is more than 90%. The soaked seeds were placed in the environment of 25 ℃, and began to germinate in about 3 days, and most of the seeds germinated in 10 days. Under the condition of 25-30 ℃, the seed germination began earlier, but the germination time was prolonged, and the germination energy was worse than that of 20-25 ℃. Under the condition of more than 30 ℃, the germination rate and germination energy of seeds decreased obviously, and the germination stopped when the germination was over 35 ℃. The germination energy and germination rate of asparagus seeds are very low at higher temperature, 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 variable temperature is better than that of constant temperature, especially the effect of low temperature treatment is more obvious. The germination rate can be as high as 98% with variable temperature treatment of 25 ℃ in daytime and 20 ℃ at night. Click to get more asparagus planting techniques click to get more vegetable planting techniques