VARIATIONS OF NONSTRUCTURAL CARBOHYDRATE CONTENT IN BETULA ERMANII AT DIFFERENT ELEVATIONS OF CHANGBAI MOUNTAIN, CHINA
ZHOU Yong-Bin, WU Dong-Dong, YU Da-Pao, SUI Chen-Ying
Chin J Plant Ecol . 2009, (1): 118 -124 .  DOI: 10.3773/j.issn.1005-264x.2009.01.013