In which areas of our country is alpine desert soil distributed? What is suitable for growing?

Alpine desert soil, also known as indifferent soil, the parent material is mainly a variety of rock weathering residues and slope deposits, but also some ice gravel. The accumulation of organic matter in soil is weak, 0.4-0.6%, salinity 0.5-1.6%, and calcium carbonate accumulation is obvious. White salt frost and crust are seen on the surface, which are porous and contain more gravel, as well as gypsum neoplasm, under which is the gravelly parent material layer.

Alpine desert in China is mainly distributed in the northwest of the northern Tibetan Plateau, and extends to the Kunlun Mountains and the Pamir Plateau, with an altitude range of 4200 to 5200 meters. The topography of the alpine desert zone is mainly on the plateau and the low mountains on the plateau.

What is suitable for planting in alpine desert soil? Alpine desert soil is seldom used and basically unused. only in the low-lying areas close to the alpine steppe soil belt, water and grass increase after stagnant water, but the suitability is narrow, so it is only suitable to graze goats and sheep.

The characteristics of alpine desert soil

Because physical weathering plays a leading role in the process of weathering, the weathering products are highly lithized. The climate of the alpine desert zone is characterized by extreme drought and very cold, with an annual average temperature of about 10 ℃, a minimum temperature of-40 ℃ in winter and an annual precipitation of less than 100mm. The coverage of alpine desert vegetation is less than 10%, and it is mainly composed of Chenopodiaceae and Compositae. Under the bioclimatic conditions of alpine desert zone, the processes of weathering and soil formation are very weak, so the soil layer of alpine desert soil is thin, there are many gravel, and the fine soil is less; the content of organic matter is only about 0.6%, alkaline reaction, PH value is about 85.

Alpine desert soil also has the obvious characteristics of desert soil, there are porous, light brown gray-white fragile thin crust (thickness is 0 stone ~ 1.5 cm), with polygonal cracks. Small gravel or gravel is sandwiched in the thin crust, often with salt spots on the surface. The climate of the alpine desert zone is cold, the winter is cold, and the freezing period is long. Soil formation belongs to the category of freezing. However, because the soil is very dry, the dry frozen layer can only be formed at low temperature, and the disturbance during the alternation of freezing and thawing is slight; in addition, the soil particles are coarse and the capillary effect is relatively weak, so there is no obvious sign in the process of soil freezing. And fully show the characteristics of frozen weathering products.