Submitted to: Society for Range Management Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 10/15/2014
Publication Date: 2/3/2015
Citation: Morgan, T.A., Blank, R.R. 2015. Effects of Phos-Chek® on soil nutrient availability. Society for Range Management Meeting Abstracts. p.10.
Technical Abstract: Wildfire frequencies and intensities have been steadily increasing on western US landscapes. Phos-chek® is an aerially-applied fire retardant used to contain and control wildfires. Composed of ammonium and phosphate salts, Phos-chek® has the potential to increase soil nutrient availability of N and P. We measured soil nutrient availability, 0-10 cm, 9 months after Phos-chek® application and in control areas north of Reno, NV. Soil beneath Phos-check® had dramatic increases in ortho-p (414%), bicarbonate-extractable P (112%), NH4+ (574%), NO3- (60%), and DTPA-extractable Zn (39%), Cu (39%), and Mn (58%), relative to the control areas. That the bicarbonate-extractable P and mineral N pools increased so markedly suggests long-lasting effects to vegetation and soil organisms. Such increases in soil nutrient availability likely explain greater growth of vegetation witnessed on Phos-chek® applied areas.