Phosphate and glyphosate sorption in soils following long-term phosphate applications

Simple item page
dc.contributor.authorMunira, Sirajum
dc.contributor.authorFarenhorst, Annemieke
dc.contributor.authorAkinremi, Wole
dc.date.accessioned2017-12-12T20:19:41Z
dc.date.available2017-12-12T20:19:41Z
dc.date.issued2017-12-01
dc.description.abstractPhosphate and glyphosate molecules compete for sorption sites in soil. The objective of this study was to quantify the impact of Olsen P concentrations in two contrasting soils on phosphate and glyphosate sorption. Soils were a sandy clay loam soil rich in iron oxides (SCL-Fe2O3) and a clay loam soil rich in calcium carbonates (CL-CaCO3). The phosphate Freundlich sorption coefficient (Kf) ranged from 3 to 68 L1/n mg1-1/n kg-1 in the SCL-Fe2O3 and from 21 to 76 L1/n mg1-1/n kg-1 in the CL-CaCO3. Glyphosate sorption coefficient (Kd) ranged from 293 to 1173 L kg-1 in the SCL-Fe2O3 but only 99 to 141 L kg-1 in the CL-CaCO3. Glyphosate Kd and phosphate Kf values decreased significantly with increasing Olsen P concentrations in both soils. Glyphosate Kd values were further significantly reduced when phosphate was added to the slurry solutions, but phosphate Kf values were not impacted by the presence of glyphosate in solutions. We conclude that annual phosphate fertilizer applications leave phosphate concentrations in Prairie soils to the extent that soils have a lesser capacity to retain glyphosate and phosphate that are subsequently applied, but glyphosate residues will not influence phosphate sorption.en_US
dc.identifier.urihttp://hdl.handle.net/1993/32717
dc.rightsopen accessen_US
dc.subjectPhosphateen_US
dc.subjectGlyphosateen_US
dc.subjectOlsen Pen_US
dc.subjectBatch equilibrium experimenten_US
dc.subjectFreundlich sorption coefficienten_US
dc.subjectSorption coefficienten_US
dc.subjectPrairie soilen_US
dc.titlePhosphate and glyphosate sorption in soils following long-term phosphate applicationsen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Munira_2017_Phosphate and glyphosate sorption in soils following long-term phosphate applications.pdf
Size:
563.77 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.24 KB
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
University of Manitoba Scholarship
Faculty of Agricultural and Food Sciences Scholarly Works