1. College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China
2. Agricultural Biotechnology Research Center, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
3. College of Ecology and Environment, Ningxia University, Yinchuan 750021, China
4. Department of Life and Food Science, Ningxia University, Yinchuan 750021, China
5. Institute of Forestry and Grassland Ecology, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China