1. College of Forestry, Shenyang Agricultural University, Shenyang 110866, China
2. Forestry and Grassland Protection Center of Hinggan League, Ulanhot 137400, China
3. Liaoning Non-Ferrous Geological Exploration and Research Institute Co., Ltd., Shenyang 110013, China
4. Research Station of Liaohe-River Plain Forest Ecosystem CFERN, College of Forestry, Shenyang Agricultural University, Shenyang 110866, China