TY - Sciences in Cold and Arid Regions A1 - T1 - Y1 - 2021-02-28 JF - Sciences in Cold and Arid Regions JO - Sciences in Cold and Arid Regions SP - 62 EP - 76 VL - 13 IS - 1 UR - http://www.scar.ac.cn N1 - 10.3724/SP.J.1226.2021.20067 ER -