In 2020, cherry blossoms in Nanjing Jiming Temple bloom in autumn, which is really rare and attracts many citizens and tourists.
1. Landscape experts from Nanjing Bureau of Greening and Landscape Architecture explained that it is not uncommon for plants to bloom again within one year.
2. Many plants, such as Crabapple, Plum, Peach and other big trees in Rosaceae, such as Admiralty, Forsythia suspensa or Elm, may have secondary flowering.
This is mainly because of the change of weather environment. In autumn, the sudden drop of temperature, heavy rain and other weather factors lead to flower bud differentiation and flowering.
4. Generally, a small number of flowers appear, which has little influence on the growth and development of plants and does not need special maintenance.
5. In addition, generally speaking, the second flowering in autumn has little effect on the next spring flowering, which is almost negligible.
6. Garden-related workers will also pay attention to these phenomena in time and do a good job in garden maintenance and management in time.
Cherry blossoms usually bloom in March and April every year. The cherry blossoms in full bloom this time are next to Cihang Bridge at the north exit of Jiming Temple.
The video released by the official Weibo of Nanjing Jiming Temple on September 19 shows that the trunk of the cherry tree is bare, but there are several white cherry blossoms and green leaves on the branches.
On the 22nd, a master of Jiming Temple said, "A few cherry blossoms were opened a few days ago, but they were not big."
Professor Bouwing Lo, director of the Department of Ecology and Evolutionary Biology, School of Life Sciences, Fudan University, said that this phenomenon is mainly related to temperature changes.
Bouwing Lo explained that there are two reasons why plants bloom, one is temperature, and the other is the change of photoperiod, which is probably caused by the change of temperature. Due to the continuous unstable fluctuation of temperature, plants have an illusion that their "biological clock" is disordered, and they think that such a temperature should bloom.
Gu, an associate professor at the School of Life Sciences, Capital Normal University, believes that the change of temperature and humidity may have promoted the early differentiation of flower buds. For example, there may be low temperature weather in summer, or it may be man-made reasons. For example, transplantation may lead to abnormal rhythm changes in plants.
Anything that breaks the rhythm is not good for the plants themselves. Bouwing Lo said, "Flowering itself is a reproductive process, which requires a lot of energy to maintain development. This unexpected rhythm change makes it blossom or sprout many buds, breaking the rhythmic biological clock. "
Gu believes that this flowering may be the normal flowering period of cherry blossoms, usually one week, but it may also be a little shorter. Bouwing Lo said that if this rhythm is restored, cherry blossoms may bloom normally next year. But if the temperature still fluctuates, flowers will get sick like people, and unexpected situations may occur.
Bouwing Lo said that at present, workers don't need to do anything. They can fertilize as usual and promote the nutrition and growth of cherry blossoms through some fertilizers and management.