Effects of several rates of potassium chloride and potassium and magnesium double sulphate in potted "Guaraná" (Paullinia cupana H.B.K.) seedlings, growing in a Latosolic B "Terra Roxa" soil in greenhouse conditions were studied. The experimental design was in randomized blocks with eleven treatments and seven replications. Data were obtained for the following variables: toxicity symptoms; number of surviving plants; plant height; stem diameter; number of single, composite and total leaves; plant top and root dry weight; visual evaluation for the top plant parts and root system. Based on these data it was stablished the plant response and the degree of toxicity for the several rates of fertilizer applied.
Paullinia cupana H.B.K.; potassium fertilizers; toxicity symptoms