[1] Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Jiangsu, Peoples R China
[2] Shandong Prov Acad Forestry, Jinan 250014, Shandong, Peoples R China
[3] Connecticut Agr Expt Stn Valley Lab, Windsor, CT 06095 USA