1. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai 810016, China
2. College of Agriculture and Animal Husbandry, Qinghai University, Xining, Qinghai 810016, China
3. The Technology Bureau of Huzhu County, Haidong, Qinghai 810500, China
4. Forest Seedling Station of Qinghai Province, Xining, Qinghai 810000, China
5. Makehe Forestry Bureau of Qinghai Province, Guoluo, Qinghai 814000, China
6. Returning Farmland to Forestland or Grassland Center of Qinghai Province, Xining, Qinghai 810000, China