Affiliation: | GENG Yu-qing1,YU Xin-xiao1,YUE Yong-jie1,2,LI Jin-hai3,ZHANG Guo-zhen3 1 Key Laboratory of Soil , Water Conservation & Desertification Combating of the Ministry of Education,School of Soil , Water Conservation,Beijing Forestry University,Beijing 100083,P. R. China 2 College of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,P. R. China 3 Prevention , Control S, Office,Beijing Municipal Bureau of L,scape , Forestry,Beijing 100029,P. R. China |