A. Ivanova1*, N. Tsenov2

1Dobrudzha Agricultural Institute, 9520 General Toshevo, Bulgaria 2Agronom I Holding, 9300 Dobrich, Bulgaria

Abstract. The productive potential of the new triticale cultivars Irnik and Boomerang was investigated in a three-year field experiment (2011 – 2013) carried out at the trial field of Dobrudzha Agricultural Institute, General Toshevo. The experiment was designed by the split plot method in four replications, the size of the trial area being 12 m2. The investigation involved four previous crops: oilseed rape, peas, sunflower and maize, and three norms of mineral fertilization, each according to the type of the respective previous crop. Fertilization with phosphorus and potassium was used as a background (Р6К6), and nitrogen was tested at the following fertilization norms: N6, N12 and N18 after previous crops oilseed rape, sunflower and maize, and N3, N6 and N9 after spring peas, with check variant N0P0K0. The effect of some agronomy factors on the formation of the yield from triticale was analyzed: the year conditions, the type of previous crop and the norm of mineral fertilization. The new genotypes were compared to the standard cultivar Rakita. The new triticale cultivars demonstrated marked responsiveness to fertilization and increased their productivity with the higher fertilization norms. Irnik and Boomerang are new genotypes of triticale with higher productive potential than the standard cultivar Rakita.