title: Uptake of phosphorus from surfactant solutions by wheat leaves: spreading kinetics, wetted area, and drying time.
abstract: The delivery and uptake of nutrients at the surface of plant leaves is an important physicochemical phenomenon that depends on leaf surface morphology and chemistry, fertilizer formulation chemistry (including adjuvant and associated surfactants), wetting dynamics, and many other physical, chemical and biological factors. In this study, the role of spreading dynamics in determining uptake of the macronutrient phosphorus from phosphoric acid fertilizer solution in combination with three different adjuvants was measured in the absence of droplet run-off and splashing. When run-off and splashing losses were zero, spreading and drying rates had a small to negligible effect on the uptake efficiency. The results suggest that uptake may be much less sensitive to the specific choice of adjuvant and long time-scale spreading behaviour than one might intuitively expect.
authors.affiliation: The University of Adelaide School of Agriculture, Food and Wine, Waite Campus, PB 1, Glen Osmond, SA 5064, Australia. courtney.peirce@adelaide.edu.au.
authors.forename: Courtney A E
authors.initials: CA
authors.lastname: Peirce
authors.affiliation: Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095, Australia.
authors.forename: Craig
authors.initials: C
authors.lastname: Priest
authors.affiliation: The University of Adelaide School of Agriculture, Food and Wine, Waite Campus, PB 1, Glen Osmond, SA 5064, Australia. courtney.peirce@adelaide.edu.au and CSIRO Agriculture Flagship, Waite Campus, PB 2, Glen Osmond, SA 5064, Australia.
authors.forename: Therese M
authors.initials: TM
authors.lastname: McBeath
authors.affiliation: The University of Adelaide School of Agriculture, Food and Wine, Waite Campus, PB 1, Glen Osmond, SA 5064, Australia. courtney.peirce@adelaide.edu.au and CSIRO Agriculture Flagship, Waite Campus, PB 2, Glen Osmond, SA 5064, Australia.
authors.forename: Mike J
authors.initials: MJ
authors.lastname: McLaughlin
mesh_terms: D005308:Fertilizers; D007700:Kinetics; D010758:Phosphorus / Q000032:analysis / Q000493:pharmacokinetics*; D018515:Plant Leaves / Q000378:metabolism*; D013501:Surface-Active Agents / Q000737:chemistry*; D014908:Triticum; D017155:Wettability
chemical_list: D005308:Fertilizers; D013501:Surface-Active Agents; D010758:Phosphorus