Supported by the National Natural science Foundation of China(No.31000006);the Fundamental Reseach Funds for the Central Universities(No.YXZOIO22);the Beijing Foresty University Young scientist Fund(No.BLX2009023)
Supported by the Fundamental Research Funds for the Central Universities(No.YX2010-22);the Beijing Forestry University Young Scientist Fund(No.BLX2009023);the National Natural Science Foundation of China(No.31000006);the Chinese Academy of Sciences(No.KSCX2-YW-G-068)