关键词: 核桃, 早实, 土壤干旱胁迫, 多元统计分析, 抗旱性综合评价

Abstract: The seedlings of 12 early fruiting walnut cultivars were used as the test materials in this
study to determinate drought resistance index such as physiological and biochemical index，photosynthesis
and chlorophyll fluorescence parameters by using natural drought stress and after rewatering method. Then
5 major indicators were selected by using principal component analysis to analyze drought resistance
coefficient of each drought resistance index characters. And then the drought resistance of early fruiting
walnut varieties were comprehensively evaluated by using membership function. The sequence of drought
resistance of twelve early fruiting walnut cultivars were：Liaohe 1 > Zhonglin 5 > Xinzaofeng > Wen 185 >
Luguang > Zhonglin 1 > Liaohe 4 > Za 343 > Chandler > Xiangling > Xilin 2 > Xifu 1. The evaluation
result is similar to the reaults tested in the field.

Key words: walnut, early fruiting, soil drought stress, multiple statistics analysis, drought resistant compehensive evaluation