Paspalum vaginatum drought tolerance and recovery in adaptive extensive green roof systems

Ntoulas, Nikolaos; Nektarios, Panayiotis A.

doi:10.1016/j.ecoleng.2015.04.091

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Adaptive green roof systems also use minimal substrate depth (5-15 cm), but are planted with various plant types such as aromatic and medicinal plants, turfgrasses, and groundcovers. In contrast with the extensive green roofs, the adaptive ones are accessible and require minimal irrigation inputs (Kotsiris et al, 2013;Ntoulas et al, 2012Ntoulas et al, , 2013aNtoulas et al, , 2013bNtoulas and Nektarios, 2015). Both extensive and adaptive green roofs require the use of plant species that have adequate water-stress tolerance and are capable of growing in shallow substrate depths.…”

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confidence: 99%

Response of Native Aromatic and Medicinal Plant Species to Water Stress on Adaptive Green Roof Systems

Kokkinou¹,

Ntoulas²,

Nektarios³

et al. 2016

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The aim of this study was to determine the effects of different irrigation regimens on five native aromatic and medicinal species including Ballota acetabulosa (Greek horehound), Helichrysum orientale (helichrysum), Melissa officinalis (lemon balm), Rosmarinus officinalis (rosemary), and Salvia fruticosa (Greek sage) when grown on adaptive green roof systems. The applied levels of irrigation were 100% (well-watered control), 75%, 50%, 25%, and 0% (no irrigation) of the daily pan evaporation (Epan). Measurements included the in situ determination of substrate moisture, stomatal resistance, and soil plant analysis development (SPAD) values. It was found that Greek horehound, helichrysum, and rosemary can sustainably grow at an irrigation of 25% Epan, whereas Greek sage and lemon balm require an irrigation of at least 50% Epan for sustainable growth in shallow adaptive green roof systems.

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confidence: 99%

Response of Native Aromatic and Medicinal Plant Species to Water Stress on Adaptive Green Roof Systems

Kokkinou¹,

Ntoulas²,

Nektarios³

et al. 2016

horts

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“…Constructed green roofs with a deeper substrate layer could also retain more water and reduce runoff volume [45][46][47]. However, this option may not be applicable because the most extensive green roof has strict load limits [48,49]. Another option to enhance the runoff reduction and water retention capacity is to construct an additional water storage layer in the green roof system [19,50].…”

Section: Discussionmentioning

confidence: 99%

Water Resilience by Centipedegrass Green Roof: A Case Study

et al. 2019

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Centipedegrass (Eremochloa ophiuroides) is a low-maintenance turfgrass. The first extensive green roof of centipedegrass was established in TongZhou Civil Squares in 2014. However, storm-water-runoff reduction, water-retention capacity, and plant-water requirements by a centipedegrass green roof has not yet been defined. The soil moisture dynamics, rainwater-retention capacity, runoff reduction, and plant evapotranspiration were investigated by simulated centipedegrass green roof plots, which were constructed in the same manner as the green roofs in TongZhou Civil Squares in 2018. The results showed that the centipedegrass green roof retained 705.54 mm of rainwater, which consisted 47.4% of runoff reduction. The saturated soil moisture was 33.4 ± 0.6%; the excess rainfall over the saturated soil moisture resulted in runoff. The capacity of rainwater retention was negatively related to the soil moisture before rain events and was driven by plant evapotranspiration. Drought symptoms only occurred three times over the course of a year when the soil moisture dropped down to 10.97%. Our results indicate that the rainwater retained in the soil almost met the needs of plant consumption; a further increase of rainwater retention capacity might achieve an irrigation-free design in a centipedegrass green roof.

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“…In arid and semi-arid regions such as the Mediterranean, where rainfall is typically absent during the summer months, additional irrigation is necessary to sustain lush green turfgrasses growing on extensive green roofs [16]. However, the use of freshwater for irrigating greenery in these regions has raised environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Tolerance of Tall Fescue (Festuca arundinacea Schreb.) Growing in Extensive Green Roof Systems to Saline Water Irrigation with Varying Leaching Fractions

Ntoulas,

Papaioannou,

Bertsouklis

et al. 2024

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As urbanization intensifies environmental challenges in contemporary cities, widespread green roof installations emerge as a potential solution. This study explores irrigating tall fescue (Festuca arundinacea Schreb.) turfgrass with saline water in extensive green roof systems, aiming to conserve freshwater resources. The objectives include determining the period of saline water tolerance and identifying the leachate electrical conductivity threshold affecting tall fescue’s green coverage. This greenhouse study comprised 24 lysimeters equipped with extensive green roof layering. Treatments included three NaCl irrigation solutions with an electrical conductivity of 3 dS m−1, 6 dS m−1, and 9 dS m−1, while tap water served as the control. Additionally, irrigation treatments were applied at two different regimes, resulting in an average leaching fraction of 0.3 for the low irrigation regime and 0.5 for the high irrigation regime. Tall fescue’s tolerance to saline water was evaluated through the determination of green turf cover (GTC) as well as the clipping dry weight and the leachate electrical conductivity (ECL) draining from the lysimeters. It was found that tall fescue turfgrass growing in extensive green roof systems can tolerate irrigation with water of electrical conductivity up to 9 dS m−1 for extended periods, approximating three months, without GTC declining below 90%, provided that a minimum leaching of 30% is maintained. Furthermore, irrigating with water at 9 dS m−1 resulted in a 24.5% reduction in cumulative clipping dry weight over the four-month study period. The regression analysis between GTC and ECL highlighted a substantial decline in GTC when ECL surpassed the critical threshold of 12.5 dS m−1.

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Paspalum vaginatum drought tolerance and recovery in adaptive extensive green roof systems

Cited by 9 publications

References 18 publications

Response of Native Aromatic and Medicinal Plant Species to Water Stress on Adaptive Green Roof Systems

Response of Native Aromatic and Medicinal Plant Species to Water Stress on Adaptive Green Roof Systems

Water Resilience by Centipedegrass Green Roof: A Case Study

Tolerance of Tall Fescue (Festuca arundinacea Schreb.) Growing in Extensive Green Roof Systems to Saline Water Irrigation with Varying Leaching Fractions

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