1. Forest Resource and Environment College, Nanjing Forestry University, 159, Longpan Road, Nanjing, Jiangsu 210037, China
2. Forest Measurement and Planning Laboratory, Forest Science Department, Agriculture Faculty, Shinshu University, 8304, Minamiminowa-Vill., Kamiina-Dtrct, Nagano 399-4598, Japan
3. Forestry Bureau of Huainan City, Huainan, Anhui 232001, China