Effect of substrate type and cultivation site in the urban fabric on growth and safety to consume the edible medicinal species Origanum dictamnus

A.N. Martini; M. Papafotiou; I. MassasN. ChorianopoulouI. ?ivanovi?

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Effect of substrate type and cultivation site in the urban fabric on growth and safety to consume the edible medicinal species Origanum dictamnus

机译：Effect of substrate type and cultivation site in the urban fabric on growth and safety to consume the edible medicinal species Origanum dictamnus

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Origanum dictamnus L. (Lamiaceae) is a small herb endemic of Crete, potentially threatened with extinction due to harvesting of wild plants for use as herbal tea. In the present work, the effect of substrate type and cultivation site on growth, as well as on accumulation of heavy metals in its edible parts was studied. Plants were planted in December 2016 in plastic containers with a green roof infrastructure (moisture retention and protection with an insulation mat, drainage layer and filter sheet) fitted and were placed on two cultivation sites: on a fully exposed roof, as well as along a moderate traffic street (Iera Odos), at the Agricultural University of Athens. Two types of substrates were used, grape marc compost:perlite:pumice (3:3:4, v/v) and grape marc compost:perlite:pumice:soil (3:3:2:2, v/v) in 10 cm depth. Plants were regularly irrigated in the April-September period and their growth was evaluated monthly. In September 2017, leaves and flowers were collected in order to determine the content of heavy metals (Cu, Pb, Ni, Mn and Zn) by atomic absorption spectrometry. Plant growth was enhanced by the soil-containing substrate. Plants cultivated at street level showed higher concentrations of heavy metals in the leaves and flowers compared to the roof cultivation. Substrate type had a significant effect only on Mn concentration, with the highest values observed in soil-containing substrate. Concentrations of all heavy metals, except Cu and Zn in flowers, exceeded the permissible limits at both cultivation sites. Therefore, O. dictamnus produced in urban environment was unsafe for consummation by humans.

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《Acta Horticulturae》 |2021年第1327期|487-494|共8页
作者
A.N. Martini; M. Papafotiou; I. MassasN. ChorianopoulouI. ?ivanovi?;
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作者单位

Laboratory of Floriculture and Landscape Architecture, Department of Crop Science, School of Plant Sciences, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece;

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正文语种英语
中图分类园艺;
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grape marc compost; perlite; pumice; soil; urban agriculture; heavy metals accumulation;

Effect of substrate type and cultivation site in the urban fabric on growth and safety to consume the edible medicinal species Origanum dictamnus

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