کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1049463 945613 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The relationship between percentage of organic matter in substrate and plant growth in extensive green roofs
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
The relationship between percentage of organic matter in substrate and plant growth in extensive green roofs
چکیده انگلیسی

Choosing an appropriate substrate is one of the most important factors for green roofs because of their harsh growing environment. However, there have been few studies on the amount of organic matter necessary for sustainable plant growth in extensive green roofs. This study examined the relationship between percentage of organic matter in substrate and plant growth in extensive green roofs, particularly at establishment stage. Different percentages of organic matter (green waste compost: 0%, 10%, 25%, 50% by volume) were added and mixed well with a commercial green roof substrate (crushed brick base, containing less than 4% organic matter). Four species of plants (Allium schoenoprasum, Limonium latifolium, Melica ciliata and Nepeta × faassenii) were grown in a greenhouse in trays containing substrates with these different percentages of organic matter. Two watering regimes were imposed: wet and dry (watering every 5 days or every 15 days). It was concluded that addition of 10% organic matter was optimal for these four species and the substrate used in this study because the plants showed stable growth regardless of the watering regime. In the wet regime, increased organic matter resulted in lush growth with may result in damage during drought. In the dry regime, increased organic matter did not result in increased growth. The response to higher organic matter content was different for different species, and species from a nitrogen-rich habitat tended to be encouraged by a high content.

Figure optionsDownload as PowerPoint slideHighlights
► Appropriate percentage of organic matter in substrate for green roof is examined.
► Addition of 10% of organic matter is appropriate for sustainable plant growth.
► High organic matter and wet in substrate causes lush plant growth.
► High organic matter and dry in substrate does not increase plant growth.
► Response to higher organic matter content is different for different species.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Landscape and Urban Planning - Volume 103, Issue 2, 30 November 2011, Pages 230–236
نویسندگان
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