1. There are still many trees on the tree that can secrete fungicides to kill all kinds of germs in the air, and can also absorb toxic gases discharged from industrial production, retain smoke and dust that pollutes the atmosphere, and eliminate noise pollution that is harmful to human beings.
2. The tree kingdom can improve the quality of the environment on which human beings depend. The tree kingdom and green plants are constantly carrying out photosynthesis and consuming trees? Carbon dioxide to produce fresh oxygen; More than 60% of the oxygen in the air comes from trees and green plants on land.
In summer, people feel very different under the shade of trees and direct sunlight. People will feel cool in the shade of trees in summer. This is because the green leaves in the dense tree crown can block the sun and absorb the radiant heat of the sun, thus reducing the temperature in the small ring. Trees are like giant water pumps, constantly absorbing water from the soil into trees, and then diffusing most of the water absorbed by roots into the atmosphere in the form of water vapor through transpiration of leaves, thus improving and regulating the relative humidity in the air.
4. The tree kingdom can also play an important role in protecting the environment on which human beings depend. We know that strong wind will increase soil evaporation, reduce soil moisture and cause soil wind erosion. In severe cases, sandstorms can bury towns and farmland. According to the statistics of 1984, 6 million hectares of land are buried by sand every year, and13 of the land in the world is in danger of desertification, calling on the international community to fight to stop desertification in some parts of the world. "If you want to live in a sandstorm, you need to plant more trees."
In mountainous areas with few trees, it is easy for trees to form a miserable scene of "drought makes rain come, rain rushes in, takes away fertilizer and soil, and leaves stones and eggs". The uneven crown and branches of trees can intercept and block rainwater, slow down the intensity of showers, and effectively prevent soil erosion to conserve water. People often say "beautiful scenery" and "green mountains and green waters" are the truth.
6. The tree kingdom not only brings us food, wood, housing and work, but also brings important ecological benefits to the environment on which human beings depend. This is something that nothing else can do; Nothing can replace it.
7. Trees can adjust the climate, purify the air, prevent wind and noise, prevent soil erosion, landslides and other natural disasters. They are oxygen manufacturers. 1 hectare broad-leaved forest 1 day can absorb 1 ton of carbon dioxide and release 0.73 ton of oxygen.
8. Trees are dust filters. When the airflow with large dust content passes through the forest, with the decrease of wind speed, the dust with large particles in the air will fall rapidly. In addition, some trees have fur on their skin or can secrete grease, which can stick dust to their bodies, thus greatly reducing the dust content in the airflow through the forest.
9. Trees are experts in sterilization. Many trees secrete fungicides during their growth, killing all kinds of germs brought by dust. According to the survey, there are 4 million department stores, 580,000 are on the boulevard, 65,438+000 are in the park, and only 55 are in the forest area. The difference of bacterial content in the air between forest areas and department stores is more than 70 thousand times.
10. Trees can also increase greening, beautify the environment and aesthetic value, and increase artistic components, industrial value, wood, woodcarving and other wood products. It also has medicinal value. Made into medicinal materials, Colleague Tree can reduce noise pollution, and 40-meter-wide forest belt can reduce noise 10- 15 dB.
Second, it can be seen that the tree kingdom and green plants are of great value to human life, and they are indeed important events related to our human life and death. How important the existence of the tree kingdom is to us human beings! We must upgrade to a higher level to look at the benefits brought by the tree kingdom. . If humans destroy trees, it is destroying their homes.
Extended data:
Generally speaking, if the average temperature in the hottest month of the year is lower than 10℃, local trees cannot grow. The lower the temperature, the shorter the shrubs, so that only grass can grow. China is located in the middle and low latitudes. Even in the northernmost Mohe County of Heilongjiang Province, the hottest monthly average temperature is 18.4℃, and the forest is still vast. In China, the low temperature in summer only affects the growth of trees on high mountains, about 2000 meters in the northeast, 3000 meters in the north and 3500-4500 meters in the mountainous areas of Qinghai-Tibet Plateau. .
2. The low temperature in summer determines whether trees can survive, while the low temperature in winter determines the kinds of trees that can survive. From Northeast China to South China, from high mountains to low altitude areas, due to the gradual increase of the lowest temperature in winter, tree species have evolved from cold-tolerant cold temperate coniferous forests to temperate broad-leaved deciduous forests, subtropical broad-leaved evergreen trees and even lush equatorial rainforests. The distribution of economic trees requires stricter temperature.
3. Generally, the apple trees in temperate zone can't stand the cold below minus 30℃, so the apples in the northeast are generally only distributed along the Bohai Sea and the Yellow Sea. Subtropical citrus is afraid of the low temperature of minus 7~9℃. If the lowest temperature is below-9~ 1 1℃, citrus orchards will suffer devastating freezing damage. Therefore, planting citrus in the north of the Yangtze River has no economic value; Rubber, a tropical crop, will be frozen when the temperature is 5℃, which is also the reason why tropical crops cannot be planted in tropical latitudes in China.
4. Observing the street trees in major cities in China, we can also find the relationship between many trees and climate. The north has a temperate climate, and broad-leaved and deciduous trees are mostly used as street trees, even in the middle and lower reaches of the subtropical Yangtze River. Because the height and temperature of the sun in these areas are relatively high and the sun is relatively hot in summer, street trees just play the role of shading passers-by at this time. By the time the cold wave rolled south in winter and the temperature plummeted, the trees had lost all their leaves and generously let the warm sunshine fill the sidewalk.
But in tropical areas, the hot summer is very long, even in winter, the temperature is very high, so most street trees are evergreen and cool all year round. In Guangzhou, Nanning and other big cities in South China, the tree crowns on both sides of the road are often connected together, making the road a pavilion. There grows a kind of tree called banyan, which can survive in tropical and subtropical warm areas in winter.
6. Due to the high temperature and humidity in the rainy season, the air roots hanging on the branches are full of vitality. Once they reach the ground, they take root in the soil and gradually become real trunks.
References:
Baidu encyclopedia-tree