The Suitability of Short Rotation Coppice Crops for Phytoremediation of Urban Soils

Applied Sciences

Marco Prati¹  Franco Ajmone-Marsan¹  Iride Passarella¹  Elio Padoan¹  Sara Bergante²  Gianni Facciotto² 

[1] Department of Agricultural, Forestry and Food Sciences, University of Turin, 10095 Grugliasco, Italy;Research Unit for Intensive Wood Production, Council for Agricultural Research and Agricultural Economy Analysis (CREA), 15033 Casale Monferrato, Italy;

关键词: short rotation forestry;    potentially toxic elements;    metals;    bioavailability;    urban contamination;   

DOI  :  10.3390/app10010307

来源: DOAJ

【 摘 要 】

This experiment was aimed at verifying the usefulness of phytoremediation using Short Rotation Coppice (SRC) in an urban Zn-contaminated site. Besides elemental uptake and reclamation, the SRC method was applied to evaluate the additional benefits of a green infrastructure. Nine different plants with rapid growth and large biomass production were selected: three Populus clones, three Salix hybrids, and three Robinia genotypes. Annual and biennial coppicing were evaluated. Poplar clones were more productive using annual coppicing, while Salix and Robinia produced higher biomass in blocks not coppiced. Poplar had the highest phytoextraction rate during the second year, with 1077 g/ha. Salix clones S1 and S3 extracted similar quantities using biennial coppicing. After two years, the bioavailable fraction of Zn decreased significantly using all species, from the 26% decrease of Robinia to the 36% decrease of Salix. The short rotation coppice method proved to be useful in an urban context, for both landscape and limiting the access to the contaminated area. Improving the biomass yield through the phytomanagement options (fertilization, irrigation, coppicing, etc.) could make SRC phytoremediation an economic and effective solution to manage urban contaminated areas, coupling the added values of biomass production to the landscape benefits.

【 授权许可】

Unknown