What is the function of vegetation in Mu Us Sandy Land?

The functions of vegetation in Mu Us Sandy Land are as follows:

1. Wind prevention and sand fixation: Vegetation can slow down wind speed and reduce wind erosion, thus preventing sandstorms and desert expansion. The roots of Elaeagnus angustifolia, Haloxylon ammodendron, Caragana korshinskii and other plants can penetrate deep into the sand to fix sand dunes, effectively preventing sand dunes from moving.

2. Soil and water conservation: Vegetation can effectively keep water in soil and reduce soil erosion. Seabuckthorn, for example, has strong drought resistance and can survive in dry sand. Its roots can go deep into the ground and keep moisture effectively.

3. Climate adjustment: Vegetation can adjust the climate by absorbing and reflecting solar radiation. Vegetation in Mu Us sandy land can absorb solar radiation, reduce the surface temperature, release water through transpiration and increase air humidity.

4. provide food and habitat: vegetation can provide food and habitat for local animals and birds. For example, the vegetation on the grassland provides food for cattle, sheep and other livestock, and also provides habitat for birds living on the grassland.

Characteristics of Mu Us Sandy Land:

1. Unique landform: The landform of Mu Us sandy land is complex, and there are many dunes and sandy land, among which the highest dune height can reach about 150m. There are also vast deserts and grasslands, as well as some rivers and lakes. This unique landform has brought special influence to the local ecological environment and human activities.

2. Bad climate: The climate in Mu Us sandy land is dry, with little annual precipitation, great changes and strong winds. The climatic conditions here are very unfavorable to the growth and development of crops, so it has been an arid and semi-arid area for hundreds of years.

3. Fragile ecosystem: The ecosystem of Mu Us sandy land is very fragile and easily affected by human activities and natural environment. Although there are some trees and vegetation here, due to the influence of dry climate and poor soil, these plants often grow slowly and are prone to pests and diseases. At the same time, there are many rare wild animals here, and their survival is also facing great threats.

4. Historical and humanistic values: Mu Us Sandy Land has a long history and rich cultural heritage. It used to be one of the important passages of the ancient Silk Road and an important activity area for nomadic people. Modern times is also an important part of the northern Shaanxi revolutionary base under the leadership of China's * * * production party.