Grouping some paddy cultivars in terms of zinc nutrition capabilities and identification of the best zinc nutrition traits of these cultivars

Abstract

The present study was conducted to group some paddy cultivars in terms of their zinc nutritional capabilities and to identify the best zinc nutrition traits of these cultivars. Present experiments were conducted with 5 different paddy cultivars (Oryza sativa L. cv Biga İncisi, Osmancık 97, Hamzadere, Ronaldo, Edirne). In the experiment, a complete nutrient solution containing 0 and 2.0 µM Zn in the form of zinc sulphate heptahydrate was applied to lime-free (0 % CaCO3) and lime-added (4 % CaCO3) quartz sand media. Experiments were conducted in 5×2×2 factorial design with 3 replications. At the end of the experiments, zinc nutrition traits of paddy cultivars were determined. Both in lime-free and lime-added sand media, Biga İncisi paddy cultivar was identified as tolerant to zinc deficiency. Ronaldo paddy cultivar was identified as the most sensitive cultivar to zinc deficiency. It was observed that in terms of investigated 15 zinc nutrition traits, 5 different paddy cultivars grown under zinc deficiency (Zn0) conditions were gathered under 2 main groups. Biga İncisi and Edirne cultivars constituted the first group; Osmancık-97 and Hamzadere cultivars constituted the second group. On the other hand, Ronaldo cultivar was found to be closer to the second group including Osmancık-97 and Hamzadere cultivars. The closest paddy cultivars grown under zinc deficiency conditions in terms of investigated traits were identified as Biga İncisi and Edirne cultivars; on the other hand, the furthest cultivars were identified as Biga İncisi and Osmancık-97 cultivars. For Osmancık-97 and Biga İncisi paddy cultivars, SPAD readings in lime-added sand media were identified as the best zinc nutrition traits. For Edirne cultivar, zinc ratio transported to shoot and shoot relative dry matter content in lime-added media were identified as the best zinc nutrition traits. For Hamzadere cultivar, relative chlorophyll content in lime-free media was identified as the best zinc nutrition.