Plant phosphorus availability index in rehabilitated bauxite-processing residue sand

Forms of Nitrogen Alter Plant Phosphorus Uptake and Pathways in Rehabilitated Highly Alkaline Bauxite Processing Residue Sand

“…Uptake of P by plants in bauxite residues is known to be limited by soil pH (Courtney & Harrington, ; Goloran et al, ). Results in this study showed that in addition to soil pH, the type of N forms used as fertilizer along with P could also influence P uptake by L. rigidum .…”

“…These results, however, have to be verified with other plant species used for rehabilitation with a long‐term monitoring on P availability in BRS under field conditions. This is because the high affinity of BRS for P may potentially limit its availability to plants particularly for the newly established vegetation in rehabilitated bauxite residue embankment areas (Goloran et al, , ).…”

“…As such, P deficiency in the vegetation cover may occur with time particularly the newly established vegetation in younger (<3‐year) rehabilitated bauxite residues (Goloran et al, , , ). Phosphorus deficiency in L. rigidum has been reported despite a large amount of P being available in amended BRS (Goloran et al, ). This study, however, did not leach the BRS growth media after addition of P fertilizer, which might have contributed to higher plant available P measured after the study.…”

An ecological assessment of rehabilitated bauxite residue

“…The issue of nutrient additions to residue through either organic/inorganic applications have been addressed Courtney and Harrington, 2012) and the difficulties in adequately assessing nutrient bioavailability is receiving increasing interest Goloran et al, 2014). The establishment and maintenance of organic matter turnover and mineral nutrient cycling are necessary for successful rehabilitation and such processes are a function of soil biota activity.…”

“…Amendment procedures to promote vegetation growth on tailings and wastes will vary with specifics of tailings type, climatic conditions, resources available and land-use envisaged. Bauxite residue tailings are a sodicalkaline by-product from the extraction of alumina from bauxite ore and recent research has highlighted the ability of amended residues to support plant growth Courtney and Kirwan, 2012;Goloran et al, 2014).…”