采用DTOPSIS法和隶属函数法对西北春玉米区域试验的综合评价

张正洁, 杨国华, 郭瑞红, 程凯华, 米兴旺, 刘飞

Comprehensive Evaluation of Regional Trials for the Spring Maize in Northwest China Based on DTOPSIS Method and Membership Function Method

Zhang Zhengjie, Yang Guohua, Guo Ruihong, Cheng Kaihua, Mi Xingwang, Liu Fei

表4 主成分的特征值向量及累计贡献率

Table 4 Eigenvalue vectors and cumulative contribution rates of principal components

指标 Index 主成分Principal component 1 2 3 4 5 6 产量Yield 0.661 0.056 0.125 0.424 -0.169 -0.323 穗长Ear length 0.165 -0.273 0.514 0.693 0.172 0.203 穗行数Row number per ear 0.210 -0.731 0.230 0.373 0.339 -0.109 生育期Growth period 0.717 -0.245 0.069 -0.16 -0.420 -0.245 株高Plant height -0.691 0.115 0.477 0.199 -0.176 0.007 穗位Ear height -0.600 0.066 0.547 0.335 0.214 -0.017 百粒重100-grain weight 0.541 -0.284 0.298 -0.205 -0.115 0.635 叶片数Number of leaves 0.418 0.538 0.076 0.542 -0.188 0.324 倒伏率和倒折率Lodging and inversion rate 0.762 0.082 0.338 -0.017 0.413 -0.146 空秆率Empty stalk rate -0.123 -0.031 0.903 0.023 -0.078 0.030 秃尖长Bald tip length 0.509 0.452 0.112 -0.365 0.494 0.081 籽粒含水量Grain moisture -0.320 0.816 -0.201 0.095 0.114 -0.046 茎腐病发病率Incidence rate of stem rot 0.602 0.581 0.171 0.159 -0.132 -0.079 特征值Eigenvalue 3.646 2.275 1.990 1.480 1.126 1.073 贡献率Contribution rate (%) 28.045 17.498 15.309 11.387 7.124 5.867 累计贡献率Cumulative contribution rate (%) 28.045 45.542 60.851 72.238 79.362 85.229