The relationship between percentage of organic matter in substrate and plant growth in extensive green roofs

Nagase, Ayako; Dunnett, Nigel

doi:10.1016/j.landurbplan.2011.07.012

Cited by 141 publications

(77 citation statements)

References 32 publications

(33 reference statements)

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“…Water content the in soil layer also changes the thermal properties of it, as more water content can increase the thermal conductivity of the layer [28]. Organic matter in soil also maintains good soil structure [29]. Required benefits from plants can be achieved by providing proper irrigation [30].…”

Section: Literature Review On the Green Roofmentioning

confidence: 99%

Impact of Green Roof and Orientation on the Energy Performance of Buildings: A Case Study from Saudi Arabia

Khan¹,

Asif²

2017

Sustainability

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Saudi Arabia is one of the largest countries in the Middle East region in terms of population, geographic area and scale of economy. It has a fast growing energy sector with over 76% of the total electricity being consumed in the building sector. Domestic buildings account for 51% of total electricity consumption. Predominantly due to hot climatic conditions, most of the energy consumption in buildings is attributed to the heating, ventilation and air conditioning (HVAC) loads. In terms of supply mix, the country entirely relies on oil and gas to meet its energy requirements. The high growth in energy demand is imposing stringent energy, environmental and economic challenges for Saudi Arabia. The present work aims to explore prospects of energy saving in buildings through the application of green roof technology. With the help of ECOTECT modelling, the work examines the effectiveness of green roof on considering modern faculty homes built in the King Fahd University of Petroleum and Minerals situated in the hot-humid climatic conditions of the Easter Province of the country. The same building has also been investigated for the hot-dry climate of Riyadh, the capital city. The work also examines the impact of orientations on the energy performance of buildings.

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Section: Literature Review On the Green Roofmentioning

confidence: 99%

Impact of Green Roof and Orientation on the Energy Performance of Buildings: A Case Study from Saudi Arabia

Khan¹,

Asif²

2017

Sustainability

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“…This not only provides a low nutrient growing substrate ideal for green roof vegetation (Molineux et al 2009, Molineux 2010, Nagase and Dunnett 2011 but also reduces extra roof weight. Problems can occur with either the addition of 'soil' and its attending clay fraction causing reduced water transmissivity or excessive compost/organic matter risking substrate shrinkage (Snodgrass and Snodgrass 2006).…”

Section: Introductionmentioning

confidence: 99%

Using recycled aggregates in green roof substrates for plant diversity

Molineux

Gange

Connop

et al. 2015

Ecological Engineering

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“…' Therefore a better alternative may be to alter the physical characteristics of the substrate by modifying or adding components (Young et al, 2014). By modifying for example; inter particle pore space (Graceson et al, 2013), organic content (Nagase & Dunnett, 2011;Rowe et al, 2006), or the addition of water retaining additives (Farrell et al, 2013;Olszewski et al, 2010;Savi & Marin, 2014) the WHC and plant available water can be increased. This increase in WHC in combination with increased organic matter (Nagase & Dunnett, 2011) and depth (Dunnett et al, 2008;Thuring et al, 2010) can lead to greater plant growth.…”

Section: Introductionmentioning

confidence: 99%

“…By modifying for example; inter particle pore space (Graceson et al, 2013), organic content (Nagase & Dunnett, 2011;Rowe et al, 2006), or the addition of water retaining additives (Farrell et al, 2013;Olszewski et al, 2010;Savi & Marin, 2014) the WHC and plant available water can be increased. This increase in WHC in combination with increased organic matter (Nagase & Dunnett, 2011) and depth (Dunnett et al, 2008;Thuring et al, 2010) can lead to greater plant growth. However promoting high levels of luxuriant plant growth may not be desirable on a green roof as plants may then become more vulnerable to drought conditions (Nagase & Dunnett, 2011;Rowe et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Increasing green roof plant drought tolerance through substrate modification and the use of water retention gels

Young

Cameron

Phoenix

2015

Urban Water Journal

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The optimal provision of green roof services is largely dependent on the health of the vegetation on the green roof, which is often affected by water availability.We assessed the impact of two substrate components, brick particle size and a polyacrylamide gel additive, and a living mulch (companion planting of Sedum spp.) on the growth, physiological and visual health of newly established plugs of Festuca ovina and Linaria vulgaris during an extreme drought (25 days) in a controlled environment greenhouse. Polyacrylamide gel and large brick substrates increased both plant species' drought tolerance whilst a Sedum living mulch had no effect. Polyacrylamide gel increased the reservoir of water that plants could access during the drought, whilst large brick promoted slower and therefore more drought resistant plant growth. Overall this study shows that polyacrylamide gel and coarser particle size substrates can significantly improve the drought tolerance of green roof plants.

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The relationship between percentage of organic matter in substrate and plant growth in extensive green roofs

Cited by 141 publications

References 32 publications

Impact of Green Roof and Orientation on the Energy Performance of Buildings: A Case Study from Saudi Arabia

Impact of Green Roof and Orientation on the Energy Performance of Buildings: A Case Study from Saudi Arabia

Using recycled aggregates in green roof substrates for plant diversity

Increasing green roof plant drought tolerance through substrate modification and the use of water retention gels

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