Potassium is one of the three essential nutrients for the crop growth and is recognized as the "food" of food.The potassium source in our country is in shortage,and the degree of dependence on the foreign import is high in all time.Qaidam basin is the important resource base of the potassium,and the potash fertilizer production (Potassium chloride) covers 87% of the total output in China.The potash is important for guaranteeing the need of the national economical and agricultural development,for stabilizing the international potash prices,changing the mode of economic growth,and building a resource conservation and environment friendly society.However,based on the limited resources in the sallow part of the salt lake in the Quaternary period of the Qaidam Basin,and the limited guarantee time,a new type big brine sylvite deposit in the west of Qaidam Basin is found recently under the buried depth of 350 m.This is expected to become the potash replacement area of Qarhan,which is the largest fertilizer production base in China.

saline lake  /  potash  /  deep brine with rich potassium  /  Qaidam Basin