Jiang Songlin, Deng Li, Luo Hao, Li Xi, Guo Baimeng, Jiang Mingyan, Jia Yin, Ma Jun, Sun Lingxia, Huang Zhuo
College of Landscape Architecture, Sichuan Agricultural University, Chengdu, China.
Front Psychol. 2021 Feb 23;12:607876. doi: 10.3389/fpsyg.2021.607876. eCollection 2021.
Indoor plants can positively impact physical and mental health in daily life. However, the benefits of viewing indoor plants may be enhanced if the plants emit a fragrant aroma. In this crossover-design study, we measured the physiological and psychological effects of fragrant and non-fragrant Primula plants on 50 female college students, and explored whether aroma stimulation had additive benefits for this group. Non-fragrant was used as a control stimulus, and , which has a floral fragrance, was used as an experimental stimulus. We measured blood pressure, pulse rate, and electroencephalogram (EEG) to evaluate physiological responses, and used a mood state profile and the semantic differential (SD) method to evaluate psychological responses. We found that mean blood pressure and pulse rate decreased significantly after the experiment in both conditions. EEGs showed that the mean values of high alpha waves, high beta waves, and relaxation scores were significantly higher in the experimental vs. control condition. The average scores on each subscale of the psychological questionnaire improved after the experiment in both conditions, and the vitality (V) subscale and total emotional state scores were significantly better in the experimental vs. control condition. The results of the SD method showed that the sense of relaxation and comfort were significantly higher in the experimental vs. control condition. Compared with the non-fragrant Primula, the fragrant Primula induced relatively better physiological and psychological effects.
室内植物在日常生活中能对身心健康产生积极影响。然而，如果植物能散发出芬芳的香气，观赏室内植物的益处可能会得到增强。在这项交叉设计研究中，我们测量了有香味和无香味报春花对50名女大学生的生理和心理影响，并探讨了香气刺激对该群体是否有额外益处。无香味报春花用作对照刺激物，有花香的报春花用作实验刺激物。我们测量了血压、脉搏率和脑电图（EEG）以评估生理反应，并使用情绪状态剖面图和语义差异（SD）方法来评估心理反应。我们发现，在两种情况下，实验后平均血压和脉搏率均显著下降。脑电图显示，与对照条件相比，实验条件下高α波、高β波的平均值以及放松分数显著更高。在两种情况下，实验后心理问卷各子量表的平均得分均有所提高，与对照条件相比，实验条件下活力（V）子量表和总情绪状态得分显著更好。SD方法的结果表明，与对照条件相比，实验条件下的放松感和舒适感显著更高。与无香味报春花相比，有香味报春花产生的生理和心理影响相对更好。
