This paper discusses the main functions of vegetation in environmental construction, such as regulating climate, changing atmospheric composition, providing wildlife habitat,

Purify the environment and so on. On the basis of reviewing and summarizing the previous environmental protection work in Shaanxi Province, this paper points out the important role of vegetation construction in Shaanxi's environmental protection.

Meaning. On this basis, five countermeasures for the coordinated development of vegetation and environmental protection in Shaanxi are put forward, including closing hillsides to facilitate afforestation, returning farmland to forests, returning farmland to forests and returning farmland to forests.

Restore shrubs, etc.

Keywords: Shaanxi; Vegetation; environmental protection

The most active, active and sensitive factor in environmental construction. Shanxizi

However, it has a special connection with human history, and the relationship between vegetation and environment is also very obvious.

Very special.

1 Environmental protection function of vegetation

Environment is the space outside a specific organism or group of organisms.

The sum of all things that directly or indirectly affect the survival of the biological group.

On the one hand, vegetation has a strong transformation effect on the environment. Good vegetation

Covering can improve the regional environment; Vegetation has been destroyed a lot, and the regional environment

It was traumatized and its quality declined. On the other hand, environmental conditions will affect planting.

Yes. In recent years, in the process of rapid industrialization and urbanization around the world,

Consume a lot of fossil fuels and release a lot of greenhouse gases such as carbon dioxide.

Not only the temperature rises, but also some toxic and harmful gases are directly destroyed.

Surface vegetation.

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Vegetation can reduce the amplitude of atmospheric meteorological conditions. First of all, vegetation

Will affect solar radiation. After sunlight hits plants, some plants

Reflected by the leaves of plants, one part is absorbed and the other part is transmitted.

To the ground. This reduces the reflection from the exposed ground. Second, vegetation can

Adjust the atmospheric temperature. The high-bud plant community is reduced by shading.

The internal temperature of the community, therefore, a piece of woodland and a piece of grassland have become a

Low temperature island. They not only reduce the temperature in the area, but also

Moreover, its adjacent absorption also reduces the energy of the reflection part, thus making

The ambient temperature drops. Third, vegetation also has an impact on atmospheric humidity. plant

The atmospheric humidity of the covered land is higher than that of the bare land, which is due to the evaporation of plants.

Water vapor is provided by Teng; Fourth, vegetation affects precipitation. That is, different types

The ability of vegetation to intercept precipitation and its influence on cloud and rain formation also

It's different. Fifth, the surface roughness formed by various forests, shrubs and grasslands is not

With, thus affecting the wind, wind direction and wind speed. In addition, the right of vegetation passage

The influence of wind, air temperature and atmospheric humidity acts on the surface evaporation, and there are plants.

The evaporation in the covered area is obviously reduced. Based on the above contents, Planting came into being.

By the concept of microclimate [1].

Vegetation can control the atmospheric composition.

Green plants absorb carbon dioxide through photosynthesis and export it to the outside.

The world releases oxygen. For a long time, the atmosphere and biosphere have been established

Dynamic balance. If the vegetation coverage and other characteristics change greatly

The original balance is broken and the whole system will try to establish a new level.

Constant. This will inevitably affect the change of atmospheric composition. With modern times

With the rapid development of industry, the emissions of greenhouse gases such as carbon dioxide are also increasing.

In the process of growth, the regulating function of vegetation is more important, while forest

Because of its large biomass, ecosystem has always enjoyed the reputation of "lung" of the earth.

Fame.

1 13 Various types of vegetation also provide various habitats for wildlife.

Vegetation is not only the habitat of wild animals, but also provides them with some

Some food. Current commercial hunting, urbanization process and agricultural destruction

Some animals' habitats and food sources are damaged, which is the reason.

The main reason of animal extinction [2]. Protecting animals means protecting their habitats.

Vegetation from land and food sources. Protecting the environment lies in protecting plants.

Yes. Natural vegetation is characterized by stable structure and high biodiversity.

Point, its "shelter" effect is much greater than artificial vegetation. keep up

The original balance of protecting various natural vegetation is to protect animals and protect the environment.

Basic measures to protect the environment.

1 14 Vegetation purifies the environment

Plants can absorb all kinds of toxic substances in low concentration range.

For example, the leaves of most plants are extremely sensitive to sulfur dioxide and hydrogen fluoride.

The absorption capacity, and the two are just a lot of harmful air pollutants.

Green plants can also drive away bacteria, sterilize, block dust and absorb radiation.

Function; Plants can also absorb and metabolize toxic substances in water, such as higher plants.

The absorption and metabolism of phenol in water by substances are widely valued [3]; okay

Vegetation coverage plays a special role in the prevention and control of noise pollution.

Use. Therefore, a whole set of biological environmental protection is emerging in environmental protection.

New technology-"green technology".

1 15 vegetation to prevent ecological environment damage

Vegetation can slow down and prevent the destruction of ecological environment to a certain extent.

Not good. Vegetation has the functions of smoking, dust retention, windbreak and sand fixation, water and soil conservation and water conservation.

Reservoirs and flood reduction.