Planting trees is of great significance.
First of all, afforestation can preserve water and soil. In places with low vegetation coverage, a large amount of sediment will flow into the river in rainy season, destroying fields, filling the river bed and blocking the estuary, which is extremely harmful. To curb soil erosion, we must plant trees, because the roots of trees are as big as crowns and can hold the soil as firmly as giant hands. The water in the captured soil is continuously absorbed and stored by the roots. According to statistics, an acre of forest stores 20 tons more water than no forest area.
Secondly, afforestation can prevent wind and fix sand. Wherever the sandstorm blows, the countryside is buried and the city becomes ruins. In order to resist the attack of sandstorm, it is necessary to build shelterbelts to weaken the wind. Once the wind meets the shelter forest, the speed will be reduced by 70% ~80%. If many forest belts are arranged in parallel at a certain distance and grass is planted, the sand blown by wind energy will be reduced.
Third, afforestation can provide many useful things for human beings. Many fruits and medicinal materials are forest products; Tea, rubber and new carbon come from trees. Forests are really useful.
In addition, afforestation can completely eliminate pollution. According to statistics, an acre of forest can absorb 20,000-60,000 kilograms of dust a year, absorb 67 kilograms of carbon dioxide and release 48 kilograms of oxygen every day. It can absorb 4 kilograms of toxic gas sulfur dioxide in a month, and one acre of pine and cypress can secrete 2 kilograms of bactericide for two days and nights, which can kill bacteria such as tuberculosis, typhoid fever, diphtheria and dysentery.
Afforestation can also reduce noise, beautify the environment, maintain ecological balance, and provide an ideal place for human beings to study, work, entertain and live.
The benefits of afforestation are endless. We should actively participate in the army of afforestation and water the mountains and rivers of the motherland with sweat.
Afforestation has many advantages:
Automatic yarn trimming device
In summer, the temperature in the shade is about 10 degrees lower than that in the open space, and it is 2-3 degrees higher in winter.
Natural dust collector
There are many tiny hairs and mucus on the leaves, which can absorb harmful particles such as carbon and sulfide in the smoke and dust, as well as harmful substances such as germs and viruses, and can also greatly reduce and reduce the dust in the air. A hectare of lawn can absorb more than 30 tons of smoke and dust every year. Therefore, people call green plants "natural vacuum cleaners".
Oxygen factory
Leaves can absorb carbon dioxide from sunlight and make oxygen needed by human body. It is measured that one hectare of broad-leaved forest absorbs about one ton of carbon dioxide and releases 700 kilograms of oxygen every day. Therefore, people call green plants "oxygen factories".
Bacterial disinfection station
Trees such as pine, camphor and elm can secrete fungicides to kill mycobacterium tuberculosis and diphtheria.
Natural silencer
Greening can also absorb sound waves and reduce noise.
Question 2: What are the benefits of planting trees? 1, soil and water conservation 2, windbreak and sand fixation
3. Reduce noise
Step 4 clean up pollution
Step 5 beautify the environment
6. Maintain ecological balance
Step 7 make oxygen
8. Adjust the temperature
9. Eliminate bacteria
10, resulting in economic benefits.
Question 3: What are the benefits of planting trees? First of all, planting trees can beautify the environment and eliminate air pollution. According to scientific statistics, one hectare of forest can absorb one ton of toxic gas carbon dioxide and release 750 kilograms of oxygen every day. According to experts' calculation, a person needs about 10 square meter of green area to ensure enough fresh air. The oxygen people need is that green plants absorb carbon dioxide in the air and release it through photosynthesis. It is calculated that an adult needs about 0.75 kg of oxygen and exhales 0.9 kg of carbon dioxide every day. Forests can absorb toxic gas sulfur dioxide; Sabina przewalskii can secrete bactericide, which can kill tuberculosis, typhoid fever, diphtheria, dysentery and other germs. Due to the continuous development of industry and mining, sulfur dioxide, nitrogen and hydrogen compounds and hydrocarbons in the air have increased greatly, which is very harmful to human health, while trees and flowers have a strong absorption effect on toxic gases in the air. The absorption of sulfur dioxide by forest is 5 10 times that of non-forest land. In a word, trees have the functions of sterilization, vacuuming and detoxification. Such as Ginkgo biloba, Betula platycladi, Elm, Platycladus orientalis, Pine and other trees, which can secrete strong aromatic volatile substances and have bactericidal effect, are called "phytoncide". Woods can shade the sun, cool down, adjust the climate and absorb sunlight. The summer temperature in the building area is lower than 8℃ 10℃. It can also reduce noise. The noise on the street without trees is five times higher than that on the street with lush trees. In this way, afforestation can not only beautify the environment and make the natural environment very pleasant, but also purify the air and ensure people's physical and mental health. Afforestation can reduce noise, maintain ecological balance, and provide an ideal place for human beings to study, work, travel, entertainment and activities, which is very beneficial to improving health.
Question 4: What are the benefits of planting trees, greening and purifying the air?
Question 5: What are the benefits of afforestation? The benefits of afforestation are:
① Protect the environment, maintain the ecosystem and improve people's living environment;
② Harnessing desertified cultivated land, controlling soil erosion, preventing wind and consolidating soil, and increasing soil water storage capacity;
(3) Automatic constant temperature, the temperature in the shade in summer is about 10 degrees lower than that in the open air, and it is 2-3 degrees higher in winter;
(4) Natural dust collectors have many fine hairs and mucus on their leaves, which can absorb harmful particles such as carbon and sulfide in flue gas, as well as harmful substances such as germs and viruses, thus greatly reducing and reducing dust in the air;
(5) oxygen is generated, and the leaves absorb carbon dioxide through photosynthesis to generate oxygen needed by the human body;
6. Kill bacteria. Trees such as pine, camphor and elm can secrete bactericides to kill bacteria such as mycobacterium tuberculosis and diphtheria.
⑦ Noise reduction;
8 can be used for shipbuilding, furniture, etc.
Pet-name ruby increase economic benefits, improve the economic value of wood and forest products;
Attending the most important thing is to purify the air, improve the cooling and humidification of the ecological environment, and adjust the temperature and humidity of the ambient air.
Question 6: What are the benefits of multiple trees? Trees can prevent soil erosion.
Photosynthesis of trees can produce oxygen and absorb carbon dioxide.
Transpiration of trees will increase air humidity.
In addition, plants can provide breath for many animals, which is beneficial to exert the influence of various animals on the environment.
Maintain the balance of ecological cycle
Maintain the material energy circulation and survival on the earth.
The following is the official content:
First of all, afforestation provides many useful raw materials and supplies for people's life and industrial and agricultural production. For example, in terms of eating, there are all kinds of sweet and delicious fruits; Fragrant tea; There are also nourishing Ligustrum lucidum on the holly tree, delicious ginkgo and other precious medicinal materials. As far as uses are concerned, wood is needed for construction, coal mining, transportation, manufacturing vehicles, ships, ruler machines, bridge building, docks, paper making, etc. For example, to build a house with a mixed structure of 1000 square meters requires wood 130 cubic meters; Mining 1000 tons of coal requires 22 cubic meters of pit wood. In agricultural production, a large number of farm tools we use are also inseparable from wood.
Wood processing products are more popular. Wood chips can be hydrolyzed to get glucose, nocturnal emission and other substances. 50 kg sawdust can extract 37 kg syrup or 10 kg crystalline glucose, which can be used in food or medicine. Every 1 m3 of dry sawdust, 70 kg of alcohol, 4.2 kg of aldehyde, 33 m2 of dry ice 18 kg of wood board can be extracted. Every 100 kg of birch bark can extract 15 kg ~ 30 kg of birch bark tar, which can be used to prepare wood preservatives or process and extract gasoline and other substances. With 1 m3 of wood, rayon or wool can be made150kg, which is equivalent to the annual output of 7.5mu cotton field or 20 ~ 30 sheep. There are also plywood and fiberboard used for building and furniture, which are mostly made of "waste" left by deforestation and wood processing. As for the tires on the vehicle, everyone must know that they are "born out" from rubber trees.
Secondly, afforestation can provide oxygen for human beings, purify the air, beautify the environment and protect the ecological environment. We know that people inhale oxygen and exhale carbon dioxide every day. On the other hand, trees are constantly carrying out photosynthesis in the sun ―― inhaling carbon dioxide and releasing oxygen. According to statistics, an acre of forest can absorb 67 kilograms of carbon dioxide and release 49 kilograms of oxygen every day, which is enough for 65 adults to breathe. Because forests provide shade and shelter from the wind, trees breathe and transpiration, and places with forests are warm in winter and cool in summer, so they can recuperate in summer. Trees can stick dust in the air and make the air fresh. Scientific tests show that one acre of forest can absorb 4 kilograms of toxic gas sulfur dioxide a month and 20-60 tons of dust a year. In addition, trees will produce a lot of special air in the process of breathing, which can treat some diseases and have a good effect on human body. For example, birch, poplar and juniper can secrete plant antitoxin, which can kill diphtheria, tuberculosis, typhoid and dysentery. Planting trees on both sides of the road can reduce noise, and various trees, flowers and green branches and leaves can beautify the environment and provide an ideal environment for people to study, work and live.
Thirdly, afforestation can preserve soil and water, and effectively control soil erosion and land desertification. Many places in China have low vegetation coverage and serious soil erosion. Especially in the Yellow River Basin, due to the loose soil, every rainy season, rain washes away, and a large amount of sediment flows into the Yellow River, which makes the river turbid and the riverbed elevated, which brings great difficulties to flood control. Planting more trees can control soil erosion. Because trees have huge roots, which grip the soil like giant hands. Water in the soil is absorbed by roots and stored. According to statistics, an acre of forest stores 20 tons more water than no forest area. The most effective and important method in desert control is to plant trees. Because "the main weapons of desert attacking human beings are wind and sand" (in Zhu Kezhen), a large number of afforestation can form a series of shelterbelts, reduce wind speed and wind power, fix sand dunes, and play a role in controlling sandstorms.
Question 7: What are the benefits of planting trees? Planting trees can purify the air, absorb carbon dioxide in the air, make oxygen and keep the air fresh. According to the survey, the content of bacteria in urban air is hundreds of times that in forest, so planting trees can absorb a lot of bacteria in the air. Secondly, planting trees can prevent soil erosion and prevent wind. It is the lack of forests in the Loess Plateau that makes a large number of fertile fields flow into the Yellow River. It can not only absorb sound waves on both sides of the road, but also effectively reduce noise. Proper planting of trees in cities can effectively reduce factories, cars and noise.