The purpose of giving symbols to poplar trees is to control the poplar catkins that fall off the poplar trees. Recently in Dezhou, Shandong, many citizens will find that the poplar trees planted on the roadside are marked with some symbols when they are walking. These symbols are common male and female symbols. One fifth of the tree species used for greening in Dezhou is poplar. In April and May every year, poplar catkins are at their peak, and many cities, including Texas, are troubled by poplar catkins. Poplar catkins flying everywhere can cause fire hazards and cause allergies in some people. Female poplar trees will have fluff, but male poplar trees will not, so marking them is also for the purpose of differentiation and management.

How to complete the work of controlling Yang Xu? The male plant has no reproductive function. Although it will bloom with catkins, the catkins will fall off quickly and no flying catkins will be produced. The female plants produce inflorescences relatively late. In April, the poplar trees sprout, leaves cover the crown of the tree, and poplar catkins begin to fly all over the sky with their seeds. Natural reproduction of female plants not only affects their own growth, but also harms the public environment. In order to control poplar catkins, relevant departments have also taken a series of measures, including water spraying, pruning, changing varieties, etc. With the update of treatment measures, relevant departments have identified a large number of poplar trees and then distinguished female and male plants. , they were also marked, and the female plants were injected with flying catkins inhibitors. This is equivalent to sterilization surgery, so that the female plants can produce catkins normally, but will not produce seeds or fly catkins. At the same time, it can also help the female plants. Plants store nutrients and can grow better.

In life, some symbols make our life more convenient. Putting different markings on poplar trees can allow staff to better manage flying catkins. Symbols are also widely used in life. For example, locker rooms and bathrooms are marked with male and female symbols, which allows people of different genders to live a safe and orderly life. This kind of mark is a graphic symbol. Graphic symbols are often used in trademarks and logos in life. In addition to graphic symbols, numerical symbols are also common. For example, in schools, numbers are used to distinguish each grade and class. Numbers also divide people into different age groups. Numbers are also a calculation method that makes people's lives more convenient.

Male and female are two gender symbols, but the essence of human beings is the same, and human character should not be symbolized. Everyone is more complex, which means richer. It is not easy to understand every rich human being. Therefore, some people judge a person by his appearance, and many people symbolize and classify human beings. For men and women. In fact, both men and women have half of their genes from their father and half of their genes from their mother. Apart from slight differences in physiology, there is no absolute difference in nature.