Bull. Spec. CORESTA Congress, Lisbon, 2000, p. 94, A6
Effect of liming on the growth and composition of the tobacco varieties Katerini and VE9
Aristotle University of Thessaloniki, Soil Science Laboratory, Thessaloniki, Greece.
Liming of acid soils is expected to be beneficial for the growth of tobacco plants. The objectives of this study were to evaluate the impact of soil liming on the yield and composition of Greek Oriental Tasty and Virginia tobacco types. Field experiments were established at two locations in Northern Greece, namely Katerini and Drama, in the spring of 1999. Calcium carbonate was added to the soil at rates equal to 0, 2, 4, 6, 8 t ha-1 to the former location and 0, 2 and 4 t ha-1 to the latter, using 4 replications. Two tobacco varieties were cultivated for one growing season, var. Katerini in the former location and var. VE9 in the latter location, with the collection of 5 and 4 primings, respectively. Tobacco samples were analysed for macro- and micro-nutrients, Pb and Cd content. Gross and trade yield were determined and plant uptake was calculated from the gross yield and the plant concentration of the elements. Selected soil parameters were also measured. The soils were inorganic, acid, loams. The incorporation of liming material in the soils increased the total gross and trade yield of the two varieties, although this increase was not statistically significant. Upon CaCO3 addition to soil, tobacco concentrations of the macronutrients N, K and Ca were significantly increased, whereas concentrations of the micronutrients Zn and Mn were significantly depressed. Lead and Cd remained practically unchanged. Elemental concentration varied with priming, with that of Pb and Cd being significantly lower with successive primings. Soil pH and exchangeable Ca increased significantly after CaCO3 application, whereas DTPA extractable Mn decreased with elevated liming rates.