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作者

Pei-Wen Chung;Stephen J. Livesley;John P. Rayner;Claire Farrell

来源

URBAN FORESTRY & URBAN GREENING,Vol.62,Issue1,Article 127119

语言

英文

关键字

Green façades;Greywater;Plant traits;Urban greening;Wastewater reuse

作者单位

School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, 3121, VIC, Australia;School of Ecosystem and Forestry Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond, 3121, VIC, Australia

摘要

Green façades can help to cool cities and buildings best when they are irrigated to provide good canopy growth and transpiration cooling. Irrigating green façades with greywater can reduce potable water demand and make use of building greywater supplies, however, greywater may negatively impact climbing plant growth through salt accumulation. We evaluated the effects of greywater irrigation on substrate properties (pH and EC) and the growth of six climbing plant species in an 18-week glasshouse experiment. Three irrigation treatments were applied to climbing plants: (1) potable water, (2) greywater, and (3) greywater flushed with potable water once every three weeks. Substrate pH did not differ among treatments, but substrate EC was greatest when irrigated with greywater flushed with potable water. Greywater irrigation was not detrimental to climbing plant growth, demonstrating that domestic greywater could replace potable water irrigation of building green façades in urban environments.