Research Brief
Foliar Potassium Absorption
Study:
The Foliar Absorption of Potassium from Organic and Inorganic Potassium Carriers
Location:
Texas A&M University, College Station TX
Researcher:
Warren E. Shafer and David Wm. Reed
Source:
Journal of Plant Nutrition, 9(2), 143-157 (1986)
Summary:
A growth-chamber study was conducted by researchers at Texas A&M University using soybean (Glycine max) to evaluate foliar uptake efficiency of various forms of foliar applied potassium . A total of 31 organic and inorganic potassium compounds were evaluated for foliar potassium uptake efficiency and burn potential. Of all sources tested, potassium acetate had the highest percent potassium absorption without causing leaf burn.
Potassium Absorption by Glycine max
10 15 20 25 30 35 40 45 50
0 5
Potassium Acetate
Potassium Sulfate
Potassium Chloride
Figure 1. Potassium absorption following application of various potassium containing compounds to Glycine max.
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