Genotipic Reaction of Yang Wheat Plants to Phosphorus Fertilization

Abstract

The reaction of 11 varieties common wheat to the phosphorus fertilization was studied under pot experiment with three P levels – 0, 200 and 400 mg P2O5/kg soil and N background N300. It was established that P fertilization increased by 39% dry mass of plants at tillering. In dependence of genotype three groups were distinguished: varieties Svilen and Factor increased dry mass at tillering parallel with increasing P levels up to Р400; 2) varieties Aneta, Viara, Laska and Sadovo 1, that decreased dry mass under P level higher than P200; and 3) Varieties Neven, Prelom, Pobeda, Katya and Bononia that slightly changed dry mass when grown under level higher than P200. The genotype specific in total P concentrations at tillering was shown in plants grown without P and under level P200. The K concentrations in studied varieties soft wheat decreased when plants were grown at P level higher than P200.