Symbols of men and women were painted on the trunk of poplar trees in Texas, and the masses shook their heads. In fact, this sign is very simple, and it is an international symbol for men and women, but when it is painted on a tree, everyone is a little confused. Although many people don't know why they want to draw marks on poplars, it is always contradictory when it comes to poplars in spring.
A good poplar, why do you want to draw such a bright red mark? The reporter contacted the garden units in Dezhou City. Liu Aixing, the engineer title of Dezhou Greening Garden Service Station, introduced in detail that poplars also have "differences between men and women", and male plants will not cause floating groups, while female plants will appear "caterpillars" on the treetops in spring.
And drawing marks on poplars to separate "boys and girls" is also to better control poplars that used to fly all over the sky. Liu Aixing said: "What floats is the female plant, and what does not float is the male plant. Nowadays, it seems that the men's factory has relaxed behind-the-scenes tidbits. Female plants have no long inflorescences, only when they sprout. "
According to statistics, the Salicaceae green plants endangered by climate, natural environment, soil layer and other factors, because of their strong adaptability, low temperature tolerance, drought resistance and other characteristics, once became landscaping and harvesting greening plants in many big cities in northern China.
Except for Fraxinus mandshurica, Sophora japonica, Paulownia and other greening plants, one fifth of the greening trees in Dezhou City chose poplar, mainly including Populus tomentosa, Populus cathayensis, Populus simonii and Populus Xinjiang. In April and May of each year, it is the peak of catkins flying all over the sky in Yang Fei in the northern region, and many northern cities, including Dezhou, have been confused by catkins. Poplar catkins flying everywhere not only endanger the natural environment and cause fire safety hazards, but also cause skin allergies of some groups continuously, which brings adverse harm to people's traffic and physical and mental health.
"Marking is to better control poplars. Female poplars float, but male poplars don't. " Liu Aixing, the engineer title of Dezhou Greening Garden Service Station, told the reporter that every year in early spring, the male plants will grow inflorescences first, but the inflorescences will fall off quickly, which is not easy to cause floating flocs. When the poplar gradually germinates, the female plants begin to grow and develop inflorescences, and the treetops are covered with "caterpillars". In the middle and late April, poplar leaves are covered with trunks, and catkins with seeds are gradually flying all over the sky.
Treatment of Poplar Flocculation In recent years, Dezhou Greening Garden Service Station has been taking measures to treat poplar flocculation, such as sprinkling water, pruning and removing species. In May last year, the countermeasures of garden units in Dezhou City were upgraded again, and 6 1 148 poplar trees in the urban green belt were identified, and 3963 1 female tree was marked. Liu Aixing said: "The logo made last year showed that it was a female plant. After floating in the previous year, the actual effect of the drug injected in May and floating in 2020 depends on it. Just like sterilization, buds are not allowed, and seeds and floes are not caused. "
It turned out that in order to better control the poplars falling in spring, the female poplars were "sterilized" and the trees were marked with "boys and girls". In addition, the retarder can also make the female poplar plants store nutrients more vigorously and grow stronger.