Efficiency of drought resistant and drought sensitive wheat triticum aestivum cultivars in the use of elements in soil
Phyton (Buenos Aires) 38(2): 137-146
Two cultivars of winter wheat (T. aestivum L. em. Thell.), 1 drought-resistant (cv. KanKing) and 1 drought-sensitive (cv. Ponca), were grown under 3 fertility regimes to compare differences in elemental uptake. Plants grew for 73 days, under controlled environmental conditions, in a well-watered very fine sandy loam soil treated with inorganic fertilizer, sewage sludge or with no fertilizer. At harvest, dry weight and concentration of P, K, Ca, Mg, Fe, Zn, Cu and Cd were determined. Drought-sensitive plants grown with fertilizer yielded the same amount of dry matter as did drought-resistant plants grown with fertilizer. Drought-sensitive plants which were fertilized accumulated more P, K, Ca, Mg, Fe and Cd than did drought-resistant plants which were fertilized. Concentrations of Zn and Cu usually were similar in the drought-resistant and drought-sensitive cultivars. Except for Zn and Cu, the drought-resistant cultivar apparently utilized more efficiently elements in soil than did the drought-sensitive cultivar.