caa a22 4500 477110312 CHVBK 20180405111607.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF00011163 doi (NATIONALLICENCE)springer-10.1007/BF00011163 Effect of heavy metals on peppermint and cornmint [Elektronische Daten] [Valcho Zheljazkov, Niels Nielsen] Heavy metal pollution of agricultural soils and air is one of the most severe ecological problems on a world scale and in Bulgaria in particular. The biggest sources of pollution in Bulgaria are some non-ferrous metals smelters, such as the Non-Ferrous Metals Combine (NFMC) near Plovdiv, situated on very fertile soils. Vegetable, arable and animal production in this area results in contaminated produce with excessive amounts of Cd, Pb, Cu, Mn and Zn. In order to discover some crops which could be grown on these areas without contamination of the end product, we conducted (in 1991-1993) field experiments in the vicinities of NFMC near Plovdiv. As experimental material we used Mentha piperita L. (cv Tundza and Clone No 1) and Mentha arvensis var piperascens Malinv. (cv Mentolna-14). Plants have been grown on three Plots: Plot No 1-at a distance of 400 m from the source of pollution; Plot No 2-at 3 km from the source of pollution and on a control Plot-in the experimental gardens of University of Agriculture in Plovdiv, at 10 km from the source of pollution. It was established that heavy metal pollution of soil and air at a distance of 400 m from the source of pollution decreased the yields of fresh herbage by 9-16% and the yield of essential oil by up to 14% compared to the control, but did not negatively affect the essential oil content and its quality. Oils obtained from Plot 1 at a distance of 400 m from the source of pollution have not been contaminated with heavy metals. Cultivar response to heavy metal pollution was established. A positive correlation between Pb concentration in leaves and in essential oil was found. Heavy metal concentration in the plant parts was found to be in order: for Cd roots > leaves > rhizomes > stems; Pb roots = leaves > rhizomes = stems; Cu roots > rhizomes = stems = leaves; Mn roots > leaves > stems = rhizomes; Zn leaves > roots > stems = rhizomes. The tested cultivars of peppermint and cornmint could be successfully grown in highly heavy metal polluted areas, as in the area around NFMC near Plovdiv, without contamination of the end product-the essential oils. Despite of the yield reduction (up to 14%), due to heavy metal contamination, mint still remained a very profitable crop and it could be used as substitute for the other highly contaminated crops. Kluwer Academic Publishers, 1996 cornmint nationallicence essential oil plants nationallicence heavy metals nationallicence mint nationallicence pollution nationallicence NHO3 extraction nationallicence Zheljazkov Valcho Plant Nutrition Lab, Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, 40 Thorvalsdsensvej, DK-1871, Frederiksberg C, Copenhagen, Denmark aut Nielsen Niels Plant Nutrition Lab, Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, 40 Thorvalsdsensvej, DK-1871, Frederiksberg C, Copenhagen, Denmark aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 178/1(1996-01-01), 59-66 0032-079X 178:1<59 1996 178 11104 https://doi.org/10.1007/BF00011163 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00011163 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zheljazkov Valcho Plant Nutrition Lab, Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, 40 Thorvalsdsensvej, DK-1871, Frederiksberg C, Copenhagen, Denmark aut NATIONALLICENCE 700 1- Nielsen Niels Plant Nutrition Lab, Department of Agricultural Sciences, The Royal Veterinary and Agricultural University, 40 Thorvalsdsensvej, DK-1871, Frederiksberg C, Copenhagen, Denmark aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 178/1(1996-01-01), 59-66 0032-079X 178:1<59 1996 178 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer