Institution: | PEI Shunxiang 1,3 LI Changhai2 GUO Quanshui3 XIN Xuebing1 SUN Jianxin4 HONG Ming3 1.Experimental Centre of Forestry in North China,Chinese Academy of Forestry,Beijing 102300,R.P.China 2.Forest Botanical Garden,Hei Longjiang Province,Harbin 150040,R.P.China 3.Research Institute of Forest Ecology,Beijing 100091,R.P.China 4.Beijing Forestry University,Beijing 100083,R.P.China |