Early-warning of Drought Stress for Typical Crops in Urumqi  with Chlorophyll Fluorescence Technique
TONG Xiao-Qin, WANG Shu-Zhi, XIA Yong, ZHANG Ye, LIU Yue-Fang, PAN Xiang-Liang
干旱区研究 . 2013, (5): 860 -866 .