Abstract: The pot study was conducted during autumn 2015 at Department of Soil Science, Sindh Agriculture University, Tandojam Pakistan to assess the effect of soil applied potassium sulphate (K2SO4) fertilizer on growth, biomass production and K accumulation of plants of tomato variety Roma. The study was executed in a net-house under natural conditions following completely randomized design. There were six treatments (0, 50, 100, 150, 200 and 250 kg K2O ha-1), each repeated thrice. A recommended blanket dose of 150 kg nitrogen and 75 kg phosphorus ha-1was also given to the crop. Tomato plants were raised in five kg plastic pots filled with a K-deficient soil (119 mg kg-1). Results of the study indicated that K nutrition significantly enhanced growth, biomass production and K accumulation of tomato plants. K nutrition augmented different plant height (49%), shoot diameter (103%), fresh biomass (134%), dry biomass (182%), number of leaves (75%) and K concentration (3.1 fold). It is concluded that a dose of 100 kg K2O ha-1 was the most optimum for tomato plants at early growth stage. These results need to be verified under field conditions at maturity level of tomatoes.
Keywords: Potassium, tomato, biomass production, K-accumulation.