Content of alochtonous substances in leaves of lime tree (Tilia cordata Mill.) as reflection of anthropogenic impact of town cultural vegetation
2002
Supuka, J. (Slovak Agricultural Univ., Nitra (Slovak Republic). Faculty of Horticulture and Landscape Engineering)
In the urban environment at the cultural vegetation spaces, the total content of alochtonous elements in leaves of lime tree (Tilia cordata Mill.) has been investigated, as are Ca, Mg, K, Na, Fe, Zn, Cu, Pb, Mn and anionic substances H2PO4-, Cl-, NO3-, (SO4)2-. Amount of accumulated elements and components in leaves are closely connected with dust fall, immissions content in air and in soil as also climatic conditions mainly precipitation. For real investigation was chosen Nitra town locality (N) and as comparative and relatively clear locality Arboretum Mlynany (AM) in distance 27 km NE from Nitra. There was found increased element content of Ca, Mg, K, Na, Cu, Pb in the leaves of lime tree on both localities in comparison to limit optimal values. Statistical significance differences in average element contents in leaves between compared localities was testified at K, Na, Fe, Cu, Pb, Mn and at components Cl-, (SO4)2-. These substances have achieved higher value at the Nitra town locality, than AM one. Increased environmental impact of town green spaces has also been reflected at leaves necrosis occurrence already in second half of august and at preliminary leaves fall down in growing season
显示更多 [+] 显示较少 [-]