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Green roof cooling contributed by plant species with different photosynthetic strategies

机译：具有不同光合作用策略的植物物种对屋顶绿化的贡献

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摘要

Building cooling by green roof is mainly dependent upon the plant performance, which maybe greatly influenced by plant species with the different photosynthetic and water use strategies. This study was conducted to investigate the different green roof cooling effects by C3 (Poa pratensis and Festuca arundinacea), C4 (Cynodon dactylon and Eremochloa ophiuroides), and CAM plant species (Sedum lineare and Callisia repens). The results showed that different plant species performed different strategies for green roof cooling. Green roof cooling with C3 and C4 plant species was mainly from their transpirations and C4 plants with higher transpiration rate performed the superior canopy cooling than C3 plants. CAM plants performed the lowest canopy cooling due to their stomata closure and lower transpiration during the daytime. All green roofs performed significant cooling in soil profile. The soil cooling by CAM green roofs could be from their canopy solar energy absorption and insulation. The significant night cooling was noticed only by the green roofs with CAM plants which could be contributed from their unique CAM energy fixation during the nighttime. Our results indicated that the green roofs with different plant species could deliver the different range of ecological and environmental benefits. (C) 2019 Elsevier B.V. All rights reserved.
机译：屋顶绿化对建筑物的冷却主要取决于植物的性能，这可能受到具有不同光合作用和用水策略的植物种类的极大影响。进行这项研究的目的是研究C3（波阿普拉草和Festuca arundinacea），C4（Cynodon dactylon和Eremochloa ophiuroides）和CAM植物种类（Sedum lineare和Callisia repens）对不同屋顶绿化的影响。结果表明，不同的植物种类对屋顶绿化采取了不同的策略。 C3和C4植物种类的屋顶绿化降温主要来自它们的蒸腾作用，蒸腾速率更高的C4植物比C3植物具有更好的冠层降温效果。由于白天的气孔关闭和较低的蒸腾作用，CAM植物的冠层降温最低。所有绿色屋顶在土壤剖面上均进行了明显的冷却。 CAM绿化屋顶对土壤的冷却可能来自其冠层的太阳能吸收和绝缘作用。只有采用CAM植物的绿色屋顶才能注意到夜间的显着降温，这可归因于其在夜间的独特CAM能量固定。我们的结果表明，具有不同植物种类的绿色屋顶可以带来不同范围的生态和环境效益。 （C）2019 Elsevier B.V.保留所有权利。

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  • 来源
    《Energy and Buildings》 |2019年第7期|45-50|共6页
  • 作者

    Cao JunJun; Hu Shuai; Dong Qin; Liu LiJiao; Wang ZhaoLong;

  • 作者单位

    Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 DongChuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 DongChuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 DongChuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 DongChuan Rd, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Agr & Biol, 800 DongChuan Rd, Shanghai 200240, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Green roof; Cooling; Photosynthetic pathway; Transpiration; Plant species;

    机译：绿化屋顶;凉爽;光合途径;蒸腾;植物种类;

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