High cold grassland

type of cultivation in China's grassland community. It is distributed in grasslands
4,000 meters above sea level. The climate in the high cold zone is cold and humid, the sun is strong, the ultraviolet effect is enhanced, the air
CO
2 content is reduced, the air is thin, the soil temperature is higher than the air temperature, the temperature changes sharply, the temperature difference between day and night is great, the average annual temperature is less than
1
degrees C, short growth season, only
120
days, annual precipitation of about
400
mm, relative humidity
70
%. Plants are low and dense, leaf area is reduced, leaves are rolled inside, pores are sinking, machinery
sysym
is developed with protection organization, the root system is shallow, plants form dense clumps, the base is often surrounded by dead leaves, playing the role of protecting the buds in winter. There are perennive herbs, cushioned shrubs or cushioned plants based on nutritional reproduction. Such as needles are alfalgrass needles, seat needles, as well as k's sheep's grass, fake sheep's grass, as well as salsa grass hard leaf moss, small semi-shrubs have seed artemisinin, Tibetan southern artemisinin, pad-shaped artemisinin and so on. Pad-shaped plants have cushioned camel quinoa, cushion-like dot plums, cushioned echipod beans, cushion-shaped fleas and so on. China's high-cold grasslands are mainly distributed in the central and southern Qinghai-Tibet Plateau, Pamir Plateau and Tianshan, Kunlun Mountain and Yanlian Mountain and other high mountains in central Asia.。