基于主成分-聚类分析的不同水分冬小麦晚霜冻害评价

王洋洋, 贺利, 任德超, 段剑钊, 胡新, 刘万代, 郭天财, 王永华, 冯伟

Evaluations of winter wheat late frost damage under different water based on principal component-cluster analysis

WANG Yang-Yang, HE Li, REN De-Chao, DUAN Jian-Zhao, HU Xin, LIU Wan-Dai, GU Tian-Cai, WANG Yong-Hua, FENG Wei

表3 冬小麦生理指标及荧光参数的主成分分析

Table 3 Principal component analysis of the physiological indices and chlorophyll fluorescence parameters of winter wheat

成分 Component 初始特征值 Initial eigenvalues 提取载荷平方和 Extraction eigenvalues 总计 Total 方差百分比 Variance (%) 累积 Cumulative (%) 总计 Total 方差百分比 Variance (%) 累积 Cumulative (%) 1 6.366 63.658 63.658 6.366 63.658 63.658 2 1.357 13.574 77.232 1.357 13.574 77.232 3 0.603 6.028 83.259 0.603 6.028 83.259 4 0.529 5.290 88.550 0.529 5.290 88.550 5 0.325 3.253 91.803 6 0.265 2.655 94.458 7 0.224 2.241 96.699 8 0.182 1.822 98.521 9 0.087 0.868 99.389 10 0.061 0.611 100