In the experimental field of Institute of field crops, Chirpan, Bulgaria, during the period 2014-2017, a field experiment has been carried out with four triticale varieties: Kolorit (standard), Attila, Boomerang and Respect. The experiment is based on the fractional plot method in four replications with a plot size of 12 m2. The effect of nitrogen fertilization in combination with leaf fertilizer has been studied. The following structural elements of the spike has been studied - mass of the spike, g; grain mass in spike, g; spike length, cm; number of grains in spike and harvest index of the spike, calculated as the ratio between the mass of the grains in the spike and the mass of the whole spike. In order to establish statistically significant differences between the variants, a dispersion analysis (ANOVA) was applied, and three-factor dispersion analysis (MANOVA) was used to establish the independent action of the factors. The study found out that the combination of mineral and foliar fertilization raises the structural elements of the spike in all varieties. In the study of the structural elements of the spike, with the longest spike of 12,6 cm and the largest number of grains - 81,5 is the Respect variety, and with the largest mass of grains is Attila - 3,91 g.

triticale, nitrogen fertilization, foliar fertilization, spike structure

biology

Presentation: poster