The Interaction of Chloride with Sulfate and Phosphate in the Nutrition of Potato Plants (Solanum tuberosum)¹

Abstract

Synopsis A highly significant negative correlation existed between Cl in nutrient solution and the uptake of SO4 in the tops of potato plants. Uptake of SO4 by roots was significantly increased by additions of P32 but not by S35 or no radioisotope. Intermediate levels of Cl reduced the uptake of P31 as compared with low and high levels of Cl. Chloride also affected maturity and dry weight relations of potato plants.

Timing of potassium chloride application effect on soil and potato uptake of chloride

“…These data indicate that potato plants accumulate large concentrations of Cl when available due to applications later in the growing season. Other researchers have confirmed this finding that potato (Corbett & Gausman, 1960) and other plant species including tomato ( Solanum lycopersicum L.) (Kafkafi et al., 1982), tobacco ( Nicotiana tabacum L.) (Fuqua et al., 1974), and sugarbeet ( Beta vulgaris L.) (James, Kidman, et al., 1970; Moraghan, 1987) take up excess Cl when excess Cl is present in soil. Fall preplant KCl treatments, which favored overwinter leaching below the root zone, resulted in the lowest soil and plant Cl concentrations when compared with other application times.…”

An evaluation of the availability of potassium in crop residues

“…This limitation on dry matter production was noted for the second harvest Additions of chlorine have been shown to exert a significant antago nistic effect on sulfur uptake by various plants (Corbett andGausman 1950 andNielsen e_t 1963). Since relatively large quantities of chlorine were added to cultures exhibiting the sulfur deficiency, it would appear that the antagonism of chlorine on sulfur availability was the principle causal mechanism involved in determining dry matter yields in this study.…”