Absorption and Mobility of Foliar Applied Nutrients.

Abstract

The absorption, transport and mobility of foliar applied radioactive isotopes of Rb, Na, K, P, Cl, S, Zn, Cu, Mn, Fe, Mo, Ca, Sr, and Ba were determined with the bean as the experimental plant. Using as a criterion the percentage of the foliar applied radioactive isotope recovered in non-treated plant parts, and autoradiography to portray gross distribution in the plant, it was found that Rb, Na and K were the most readily absorbed and most highly mobile. Ca, Sr and Ba, while absorbed by the leaf, were not exported from the leaf and were considered immobile. P, Cl, S, Zn, Cu, Ma, Fe and Mo were intermediate, with decreasing mobility in the order given.