Uptake of Munitions-Derived Depleted Uranium by Three Grass Species

Autor:	Terry McLendon, J. Fleckenstein, David L. Price, Michael C. Meyer, E. Schnug
Rok vydání:	2005
Předmět:	biology Moisture Physiology Schizachyrium scoparium chemistry.chemical_element Aristida purpurea Uranium biology.organism_classification Soil contamination chemistry Agronomy Depleted uranium Botany Poaceae Agronomy and Crop Science Plant nutrition
Zdroj:	Journal of Plant Nutrition. 27:1415-1429
ISSN:	1532-4087 0190-4167
DOI:	10.1081/pln-200025854
Popis:	Uptake of depleted uranium (DU, 238U) derived from weathered munitions was assessed in a greenhouse experiment utilizing three common grass species, Schizachyrium scoparium (little bluestem), Buchloe dactyloides (buffalograss), and Aristida purpurea (purple threeawn). Both aboveground and belowground uptake was dependent on the soil DU concentration, and on the experimental moisture regime utilized during the experimental duration. Uptake was enhanced under higher moisture regimes, suggesting a greater degree of DU solubility and concomitant plant availability. Concentration ratios (calculated by dividing plant tissue DU concentrations by soil DU concentrations) decreased with increasing soil DU concentrations, but increased as more moisture was applied. The toxicity level of DU in root tissue was estimated to 270 mg kg−1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c86b1aaf837755402cefb175dabdf14c https://doi.org/10.1081/pln-200025854 Zobrazit plný text záznamu