STUDIA UNIVERSITATIS

AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN ROMÂNA ENGLISH INFO PARTENERI ADRESE DE CONTACT ACCES PARTENERI FORMULAR ABONAMENT NEWSLETTER & DOWNLOAD CELE MAI NOI APARITII APARITII ÎN ANUL CURENT TOATA ARHIVA STUDIA CAUTARE ÎN ARHIVA ISTORIE PREZENT SCOP SI OBIECTIVE ECHIPA


	Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.


	STUDIA BIOLOGIA - Ediţia nr.1 din 2004

	Articol:	UPTAKE OF HEAVY METALS BY MAIZE (ZEA MAYS) PLANTS CULTIVATED ON MINE SPOILS. Autori: DORINA PODAR, CRISTINA DOBROTĂ, MIHAI TRIFU.


	Rezumat: The uptake of heavy metals (Cd, Cu, Pb and Zn) by maize (Zea mays) plants cultivated, under field conditions, on mine spoils from Cavnic (Baia Mare) was studied. The experiment, consisting of 4 treatments: control (agricultural soil) and 3 mixtures of agricultural soil with contaminated spoils from Cavnic, in the following proportions: 10, 20 and 30% spoils, was repeated for three years. The concentration of Cd in the maize organs was under the detection limit of the Atomic Absorption Spectrometry (AAS). The accumulation of Zn and Cu in stems and leaves of maize was in the range of normal values: 20-150 mg Zn kg-1 d. wt. and 5-20 mg Cu kg-1 d. wt., whereas the concentrations of Pb in the leaves of plants treated with 20 and 30% spoils were between 1.2 to 2.2 fold higher than the upper normal limit: 6-8 mg Pb kg-1 d. wt. Lead accumulated mainly in roots, whereas Zn and Cu accumulated both in roots and leaves. In all treatments, the concentrations of Cd, Cu, Pb and Zn in grains of maize were in the range of normal values. The above-ground �green� biomass of maize plants was not severely reduced by the heavy metals from spoils, but the grain yield was significantly diminished, especially in treatments with 20 and 30% spoils. The climatic factors are also able to modify the influence of heavy metals from spoils on the growth and yield of maize plants.




			Revenire la pagina precedentă