Why do trees on the side of the road in the city have to be painted white

The trunks of the trees on both sides of the highway are white, not white paint, but whitening agent. The whitening agent is made of stone sulfur mixture.

Stock solution, salt, grease, quicklime.

The water is made in a ratio of 1:1:1:10:30.

A common measure used in the management of fruit trees and garden trees is called whitening of the trunk. Whitening is usually done at the beginning of winter. The whitening height is about meters.

The main role of whitening the trunk:

First, kill germs and insect pests. The whitening agent has the effect of preventing bacterial infection, and the whitening agent can kill the eggs and adults that overwinter in the cracks of the trunk bark, and play a role in protecting the trees.

Second, it has the effect of anti-freezing and anti-sunburn. In winter, when the weather is cold and the temperature is low, there is a protective layer on the trunk after it is painted white, which can play a role in preventing frost damage. In the daytime, when the sun is exposed to strong sunlight, the white layer absorbs less heat, so that the temperature of the trunk is basically stable, so as to prevent sunburn of the trunk.

and the effect of sunburn.

Thirdly, it prevents animals and livestock from eating the bark and plays a role in protecting the trunk.

Fourth, the white painting of tree trunks on both sides of the highway also has the effect of being beautiful and convenient for vehicles to drive at night, and there is a warning function after the white reflection.

One: cold resistance. In winter, we wear thick clothes and pants to keep warm, and the same is true for trees, for trees, they don't move and can't wear thick clothes like we humans.

Trees rely only on their bark to keep out the cold. However, it is often cold in cities, and the temperature difference between day and night is relatively large, and trees are very prone to cracking due to temperature imbalance. In fact, white paint is called white glue, and in order to protect trees, people use white glue composed of quicklime, water, and animal oil to apply to the trunk.

This layer of white glue is like a "winter coat" for trees, which can keep the trees at a normal temperature and not crack, and play a role in protecting the trees.

Two: Kill pests.

For trees, the biggest natural enemy is pests, so in order to protect trees from pests, people brush white glue on the trunk. This layer of white gum can play a role in killing pests and fungi. Many pests start from under trees and climb up trees, such as ants.

Secondly, pests like to inhabit black and dirty places, and they don't like white and clean places, so from the perspective of pest habits, brushing trees with white glue can effectively prevent pests from running to trees to inhabit, and can also effectively kill pests that inhabit trees.

Three: beautiful. Do you feel that after whitening the tree, you will feel very neat and beautiful?

I believe that many friends have this feeling, in fact, for the city, it is a very proud thing to be able to plan the greening in an orderly manner, and the white glue for the trees can play a good aesthetic role. Just think about it, it looks good to see that all the trees are neatly painted white.

The big trees that we see everywhere in the city are painted with a layer of white paint under the trees, but in fact it is not paint, but white glue. It is a good way to protect trees, but it also has an aesthetic effect. Urban tree planting is very important, because trees can not only purify the air, but also absorb carbon dioxide and other gases, which is a "good helper" to optimize the urban air environment.

There are too many functions for this, the first one is to prevent winter insects from parasitic on the trunk and sterilize them. Second, to prevent trees from frostbite in winter and early spring. Third, the role of aesthetics.

The trees are painted with lime instead of white paint, and the air humidity is high in winter, and the lime heats up when exposed to water, which can play a role in keeping warm. In addition, lime also has the effect of sterilization and insect control, which can prevent the trunk from being eroded by pests.

The reason why the tree should be painted with white paint is actually to prevent insect pests and also have a certain warmth function.

The reason why I choose to paint white paint is for aesthetics, and the other is that it can play a role in disease prevention.

It is lime, the principle is to use lime slurry mixed with other raw materials, brush onto the trunk, to control pests and diseases and reduce the damage of landscaping trees due to frostbite and sunburn.

Whitening is done before the onset of winter. In winter, most of the pests and diseases have entered the dormant period of overwintering, and the whitening of the tree part at this time can greatly reduce the harm of spring pests and diseases, and obtain twice the result with half the effort.

Brush it again next spring, and it will not be easy for the insects that hibernate underground to climb the tree to cause harm. Because the lime will be the worm that will dehydrate and die, so they will stay away.

In winter, the trunk is whitewashed, which can reflect the sun's rays on sunny days, reduce the solar heat absorbed on sunny days, reduce the temperature difference before and after frost damage and the temperature difference between day and night on the trunk, and can prevent or reduce frost damage.

The main ingredients of white paint are lime milk, salt, soybean flour and stone sulfur mixture, all of which are mixed together to become a white "wrapping layer" painted on the trunk. When making white paint, water should be added in a certain proportion, then stirred evenly, and finally a small amount of pesticides should be added, so that the white paint is made, and the whole production process is relatively simple. It should be noted that protective measures such as gloves need to be worn during the process of making white paint.

It does the following:

1. Sterilization. The composition of white lacquer contains lime, which has a certain bactericidal effect, which can kill the bacteria parasitic on the trunk and is conducive to the better growth of roadside trees.

2. Prevent pests and diseases.

White lacquer contains pharmaceutical ingredients that can protect roadside trees from pests and diseases in winter, and the effect is relatively obvious.

3. Prevent frostbite.

White paint can reflect sunlight, avoid excessive temperature in the plant, reduce the temperature difference between day and night, so that the plant can grow healthily at a suitable temperature.

4. Neat and beautiful.

It will be more beautiful to paint white paint uniformly, and the bottom of the tree will be neatly painted white, and it will look beautiful.

The main function is to prevent pests and diseases. It is mainly used in the north, and the time of use is before the beginning of autumn and winter.

The principle is as follows: many insect pests on trees will not survive the northern winter by hard resistance, and will freeze to death, so in the long evolutionary process, a strategy has gradually evolved, that is, before the arrival of winter, the tree burrows into the soil to make a cocoon, and then climbs the tree again to do evil. The main material for whitening is lime (alkaline), and insecticides are added to brush about 1 meter above the ground to the trunk of the tree, and the insect pests on the trees below and above are killed by contact.

In addition, the alkalinity of lime also has a certain killing effect on viruses, bacteria and microorganisms that harm trees, but it is limited to the whitewashed area and is small compared to the whole tree, so this effect should not be the main one.

Whitening the tree is to disinfect, and the main ingredient of the white liquid is calcium hydroxide to control pests and diseases on the tree.

On the one hand, whitewashing can play the role of sterilization and insect control, and on the other hand, it can play a role in anti-freezing in winter.

Insect repellent eye-catching looks relatively neat.

In order to kill insects, red is to unify the height and look good.