The role of forests, what are the roles of forests

A forest, is an area with a high density of trees (or historically, a wasteland set aside for hunting) that covers about % of the Earth's surface (or 30% of the total land area). These plant communities cover a large area of the globe and play an important role in the decline of carbon dioxide, fauna, regulation of hydrological turbulence and soil consolidation, and are among the most important habitats in the Earth's biosphere.

The cradle of human culture, the decoration and beautifier of nature, the resource of life, the habitat of wild animals and plants, the golden treasure house, the green treasure house, the natural oxygen manufacturing plant, the green bank, the natural regulator, the originator of coal, the natural water storage tank, the windproof Great Wall, the natural vacuum cleaner, the lungs of the city, the natural monitor, the epidemic prevention personnel of nature, the natural soundproof wall, the natural reservoir, the lungs of the earth, the natural air conditioner.

Wind and sand fixation to prevent soil erosion.

The functions of forests are: air purification, water conservation, wind prevention and sand fixation, climate regulation and mitigation of greenhouse effect.

1. Purify the air.

Forests are the lungs of the earth, and every tree is an oxygen generator and carbon dioxide absorber. A linden tree can absorb 16 kg of carbon dioxide a day, and 150 hectares of broad-leaved forests such as poplar, willow and locust can produce 100 tons of oxygen a day. If urban residents occupy an average of 10 square meters of trees or 25 square meters of grass per person, they will have a place to exhale carbon dioxide, and the oxygen they need will also have 67 kilograms of carbon dioxide, releasing 49 kilograms of oxygen, which is enough for 65 adults to breathe.

2. Conserve water sources.

Forests are a huge "reservoir" that conserves water and plays an important role in the natural cycle of water. "The green mountains are always there, the clear water is always flowing, and the trees are always associated with the water. Some of the rainwater that falls is intercepted by the canopy, and most of it falls to the dead branches and leaves under the trees and the loose and porous woodland soil to be stored, some of which is absorbed by the roots of the plants in the forest, and some of which are returned to the atmosphere through evaporation.

3. Wind prevention and sand fixation.

Forests can prevent wind and sand fixation, and stop soil erosion. When the wind blows, it blocks the way with the canopy of the tree, lowers the wind speed, and the roots of the tree are long and dense, grabbing the soil and preventing the wind from blowing away. Heavy rain falls into the forest, seeps into the deep slag layer of the soil and the crevices of the rocks, and flows out slowly in the form of groundwater, which cannot wash away the soil.

Fourth, regulate the climate.

Forests also play a role in regulating the microclimate, and it has been determined that the temperature in woodlands is 3 to 5 % lower than in non-woodlands during the hot summer. In the cold and windy winter, the forest can reduce the wind speed and increase the warmth, thus playing a role in warm winter and cool summer. In addition, the foliage of plants in the forest has a transpiration effect, which increases the humidity of the surrounding air.

5. Slow down the greenhouse effect.

Forests also serve as buffers against global warming. Due to the recent massive use of fossil fuels by human beings and the large-scale reduction of forests, the concentration of carbon dioxide in the atmosphere has increased rapidly, resulting in a "greenhouse effect" and a global warming trend. The results of the study show that the reduction of forest area accounts for about 30%-50% of the current increase in atmospheric carbon dioxide concentration.

The functions of forests include water conservation, soil conservation, air purification, temperature regulation, and farmland protection.

1. Conserve water sources. Forest roots and humus improve soil properties, protect the ground from direct rainwater, reduce soil erosion, and conserve water.

2. Conserve the soil. The root system of the forest can fix the soil, conserve water, maintain water and soil, and absorb and utilize salt. Litter can increase organic matter and humus, which can effectively improve soil structure and soil fertility.

3. Purify the atmosphere. It can effectively slow down the greenhouse effect, 90% of the carbon of terrestrial ecosystems is naturally stored in forests, and 350 kg of carbon dioxide can be sequestered for every 1m3 grown in forests, which can reduce the depletion of the ozone layer.

4. It has the function of adjusting the temperature. The forest has a lush and delicate canopy, which can block solar radiation, and the temperature difference between day and night and winter and summer in the forest is small, which can reduce the damage of frost.

5. Protect farmland. The perfect farmland shelterbelt system can prevent wind and sand fixation, conserve water sources, regulate temperature, effectively improve the agricultural ecological environment, enhance the ability of agricultural production to resist natural disasters such as drought, sandstorms, dry and hot winds, hail and frost, and effectively promote stable and high agricultural yield.

1. Forests are purifiers of the air.

2. Forests have a natural epidemic prevention function.

3. Forests are natural oxygen plants.

Fourth, the forest is a natural muffler.

5. Forests have a regulating effect on climate.

6. Forests change the low-air flow, which has the functions of preventing sandstorms, reducing floods, conserving water sources, and conserving water and soil.

7. Forests have dust removal and sewage filtration effects.

8. Forests are the habitat of a variety of animals, as well as the growth of many types of plants, and are the most active areas for the reproduction of organisms on the earth.

As the main body of renewable natural resources and terrestrial ecosystems on the earth, forests play an irreplaceable role in the history of human survival and development. Known as the lungs of the earth, forests absorb large amounts of carbon dioxide to produce oxygen for humans and other living things. Forests are oxygen production plants, dust filters, natural reservoirs, and natural air conditioning ......The benefits of the forest are endless!

Forest is the foundation for the sustained, rapid and healthy development of the entire national economy, and it has an irreplaceable position and role in the country's economic construction.

Conserve water and maintain water and soil: After the rain falls to the forest, it will first be blocked by the canopy, flow down the trunk to the ground, and then be entangled by the intertwined roots, and because the forest soil is loose, a part of the water seeps into the ground and becomes groundwater, so that the water that directly forms runoff from the surface is reduced a lot, and it is not easy to cause flash floods and avoid soil erosion caused by large water scouring the surface.

Purifying the air: Forests have many functions to purify the air: First, it maintains the balance of oxygen and carbon dioxide (CO2) in the atmosphere Forests are the main producers of oxygen and consumers of carbon dioxide, which balances the increase in the concentration of carbon dioxide in the atmosphere due to industrial development and population increase Secondly, forests can reduce the concentration of harmful gases in the atmosphere It can not only block harmful gases, but also filter and absorb harmful gases; Thirdly, reducing radioactive materials in the air Forests can block, filter and absorb radioactive materials; Fourth, reduce the dust in the air, the forest can block, filter and absorb the dust in the air and also fix the dust on the ground; Fifth, reduce bacteria in the air Trees can secrete volatile substances, which have the effect of killing bacteria and inhibiting bacteria

Purification of sewage: Forests greatly reduce the amount of dissolved matter in the water that flows, resulting in a greatly reduced number of bacteria in the water

Noise Reduction: The dense foliage of trees makes sound waves undirected reflection or absorption, resulting in a much lower noise

Regulate climate: Forests regulate temperature, humidity, and wind Large areas of forests can regulate the climate of a large area or even the world, and small areas of forest belts can also play a role in cooling, humidifying and purifying the air

Soil and water conservation: Forest canopy can retain precipitation and avoid direct erosion of the surface, and store rainwater Tree roots can fix the soil and absorb water Fallen leaves and dead branches can also absorb a considerable amount of water, reducing surface runoff and preventing soil erosion

Farmland protection: Forests and shelterbelts can reduce wind, drought, waterlogging and other disasters Forest belts can greatly reduce wind speed, reduce water volatilization, and increase humidity

In addition, forests also play a role in maintaining ecological balance, beautifying the environment, and promoting human health