对遮光率0%（全光照，CK）、22%、58%和70%条件下11个睡莲（Nymphaea tetragona Georgi）品种的生长和生理指标进行比较和分析，并采用主成分分析法和隶属函数法对11个睡莲品种的耐阴性进行综合评价。结果表明：总体上看，遮光率22%、58%和70%处理组，11个睡莲品种的开花数、叶片数以及叶片中可溶性糖含量和叶绿素a/b值小于CK组，叶片中叶绿素a、叶绿素b和总叶绿素含量大于CK组。遮光率22%、58%和70%处理组，‘黑美人’（‘Black Beauty’）、‘约瑟芬’ （‘Josephine’）、‘保罗蓝’（‘Paul Stetson’）和‘科罗拉多’（‘Colorado’）的叶面积和冠幅总体上大于CK组；‘克里三萨’（‘Chrysantha’）的叶面积显著小于CK组，其他6个睡莲品种的叶面积与CK组间无显著差异；‘玛格丽特’（‘Margaret’）的冠幅均显著小于CK组，其他6个睡莲品种的冠幅总体上在遮光率22%和58%处理组大于CK组，在遮光率70%处理组小于CK组。综合评价结果显示：11个睡莲品种的耐阴性由强到弱依次为‘约瑟芬’、‘黑美人’、‘保罗蓝’、‘科罗拉多’、‘玛格丽特’、‘霞妃’（‘Sunshine Princess’）、‘流星’（‘Meteor’）、‘教王’（‘King of Siam’）、‘红仙子’（‘Rose Arey’）、‘莱德格尔’（‘Ledeger’）、‘克里三萨’，与睡莲的生长和生理指标变化基本一致。研究结果显示：主成分分析法和隶属函数法可用于睡莲品种的耐阴性评价。

 Growth and physiological indexes of 11 Nymphaea tetragona Georgi cultivars under shading rate of 0% （full light， CK）， 22%， 58%， and 70% were compared and analyzed， and shade tolerance of 11 N. tetragona cultivars were comprehensively evaluated by using principal component analysis and subordination function methods. The results show that in general， flower number， leaf number， and soluble sugar content and chlorophyll a/b value of leaf of 11 N. tetragona cultivars in treatment groups of 22%， 58%， and 70% shading rate are lower， while contents of chlorophyll a， chlorophyll b， and total chlorophyll in leaf are higher than in CK group. Leaf area and crown width of ‘Black Beauty’， ‘Josephine’， ‘Paul Stetson’， and ‘Colorado’ are generally greater in treatment groups of 22%， 58%， and 70% shading rate than in CK group； leaf area of ‘Chrysantha’ is significantly lower than in CK group， while that of other six N. tetragona cultivars shows no significant difference with CK group； crown width of ‘Margaret’ is significantly smaller than in CK group， while that of other six N. tetragona cultivars is generally greater in treatment groups of 22% and 58% shading rate， but smaller in treatment group of 70% shading rate than in CK group. The comprehensive evaluation result shows that shade tolerance from strong to weak of 11 N. tetragona cultivars is in the order of ‘Josephine’， ‘Black Beauty’， ‘Paul Stetson’， ‘Colorado’， ‘Margaret’， ‘Sunshine Princess’， ‘Meteor’， ‘King of Siam’， ‘Rose Arey’， ‘Ledeger’， ‘Chrysantha’， which is basically in accordance with the variations of growth and physiological indexes of N. tetragona. It is indicated that principal component analysis and subordination function methods can be used to evaluate shade tolerance of N. tetragona cultivars.