1, germination period
The germination period of Chinese onion is the germination period from sowing to cotyledon emergence. 7- 10 days after seed germination, the radicle sticks out and plunges into the middle, the cotyledon elongates, and the waist arches out of the ground, that is, the nose stands up.
Then, a surface grows on the top of the cotyledon, which is a "straight hook", and then the first leaf grows from the leaf outlet.
2. Seedling stage
At the seedling stage of Chinese onion, the seedling stage is from the direct hook of the leaves to the fixed planting. It can be broadcast for 8-9 months at most in autumn.
Usually, the seedling stage of autumn sowing Chinese onion is divided into three stages: before winter, during winter and after spring. In the first 40-50 days of winter, the overwintering period 120- 150 days, and the blooming period of 80- 100 days, the blooming period is the key period for strong seedlings. In the sowing period of 80-90 days, spring-sown green onions quickly enter the vigorous growth period after emergence.
3. Formation period
The formation period of scallion is from planting to stopping the growth of scallion, *** 120- 140 days, which can be divided into two stages: slow seedling and summer, scallion formation period and scallion enrichment period.
4. dormant period
There is no obvious physiological dormancy period for the hibernating Welsh onion. The Welsh onion in northern China was forced to enter dormancy at low temperature, and the dormancy period was 120- 150 days. After the temperature rose in spring, the plants began to grow back to green.