An adaptive approach to intensive green roofs in the Mediterranean climatic region |
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| Authors: | George Kotsiris Panayiotis A Nektarios Nikolaos Ntoulas George Kargas |
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| Institution: | 1. Laboratory of Floriculture and Landscape Architecture, Department of Crop Science, Agricultural University of Athens, 75, Iera Odos, 118 55 Athens, Greece;2. Division of Water Resources Management, Department of Natural Resources Management & Agricultural Engineering, Agricultural University of Athens, 75, Iera Odos, 118 55 Athens, Greece;1. Debre Markos University, Department of Natural Resource Management, P.O. Box 269, Ethiopia;2. Ethiopian Institute of Architecture, Building Construction and City Development (EiABC), Addis Ababa University, P.O. Box 518, Ethiopia;1. Faculty of Agriculture and Life Science, Hirosaki University, Hirosaki, Aomori, Japan;2. Arid Land Research Center, Tottori University, Hamasaka 1390, Tottori, Japan;3. Department of Ecoregion Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan;1. School of Environment and Development, University of Manchester, Manchester M13 9PL, United Kingdom;2. Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, United Kingdom;1. Department of Construction and Technology in Architecture, Escuela Técnica Superior de Arquitectura, Universidad Politécnica de Madrid, Av. de Juan de Herrera 4, 28040 Madrid, Spain;2. Industrial Engineering and Mathematical Sciences Department, Faculty of Engineering, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;3. Construction, Civil Engineering and Architecture Department, Faculty of Engineering, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;4. Instituto de Energía Solar, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain;1. GREA Innovació Concurrent, Universitat de Lleida, Edifici CREA, Pere de Cabrera s/n, 25001 Lleida, Spain;2. Departament d’Enginyeria Mecanica, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Spain |
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| Abstract: | The present study aims to introduce an adaptive approach to intensive green roofs by evaluating suitable, lightweight substrates and by determining the effect of their depth on the growth and physiological status of Pittosporum tobira L. and Olea europaea L. The two-year study was conducted in outdoor containers (1.2 m × 1.2 m) while treatments included the use of two depths (30 cm and 40 cm) and three different substrates: (a) pumice (Pum) mixed with peat (P) and zeolite (Z) in a volumetric proportion of 65:30:5 (Pum65:P30:Z5), (b) pumice mixed with compost (C) and zeolite in a volumetric proportion of 65:30:5 (Pum65:C30:Z5) and (c) sandy loam soil (S) mixed with perlite (Per) and zeolite in a volumetric proportion of 30:65:5 (S30:Per65:Z5). Each experimental plot was planted with four plants of P. tobira and one plant of O. europaea var. Koroneiki. Measurements included determination of the physical and chemical characteristics of the substrates while plant growth and physiological status were determined through plant growth index, trunk perimeter for olive trees, SPAD measurements and chlorophylla+b content. Both the plant species exhibited better growth and higher chlorophyll content in the compost-amended substrate (Pum65:C30:Z5) due to its higher nutrient content. The 40 cm depth substrate provided minimal improvement in the growth of both the plants at the end of the first year while in the second year the deeper substrate positively influenced the growth of olive trees. |
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| Keywords: | Substrate formulation Substrate depth Olive tree |
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