Mediterranean Extensive Green Roof Self-Sustainability Mediated by Substrate Composition and Plant Strategy

被引:2
|
作者
Vannucchi, Francesca [1 ,2 ]
Bibbiani, Carlo [3 ]
Caudai, Claudia [4 ]
Bretzel, Francesca [1 ,2 ]
机构
[1] CNR, Res Inst Terr Ecosyst, I-56124 Pisa, Italy
[2] NBFC Natl Biodivers Future Ctr, I-90133 Palermo, Italy
[3] Univ Pisa, Dept Vet Sci, I-56124 Pisa, Italy
[4] CNR, Inst Informat Sci & Technol Alessandro Faedo, I-56124 Pisa, Italy
关键词
annuals; biodiversity; herbaceous species; nitrogen; water retention curves; recycling; COMPONENTS; GRASSLAND; SOIL;
D O I
10.3390/horticulturae9101117
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
In the cultivation of extensive green roofs (EGRs), substrate composition is a key aspect together with the evaluation of suitable recycled materials. Recycling materials as amendments can improve the establishment of a self-sustainable EGR, thus providing ecosystem services and benefits from a circular economy and climate change perspective. This study investigates the effects of compost and paper sludge on water retention, substrate temperature attenuation and plant diversity in an EGR experiment. The substrates were composed of tephra (V), compost (C) and paper sludge (P) as follows: VC, as control, VPC and VP. Herbaceous species with different ecological functionality (succulents, annuals, perennials, legumes, geophytes) were sown and/or transplanted with no cultivation inputs. Plant community composition -abundance- and diversity-richness-, substrate water retention and temperature were analyzed. The VPC and VC had the same average substrate temperature, with values lower than VP. The water retention capacity was higher in VC, thanks to the presence of compost. The substrate with paper sludge (VPC and VP) showed the highest species diversity. The VPC substrate was the best compromise for EGR temperature mitigation and plant diversity improvement. Plant functional types in EGRs can be increased, and thus the biodiversity, by modulating the quality and percentage of amendments. The substrate composition can also affect water retention and substrate temperature. In addition, the use of recycling paper sludge in growing media is a winning strategy to reduce waste.
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页数:13
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