Effect of year and fertilization on total biomass formation during the vegetation period of common wheat varieties

Albena Ivanova, Nikolay Tsenov

Abstract: The investigation was carried out under field conditions during 2009 – 2011 in the trial field of Dobrudzha Agricultural Institute – General Toshevo (DAI). The experiment was designed by the split plot method in four replications, each of 12 m2. Four common winter wheat cultivars developed at DAI were tested – Iveta, Enola, Bolyarka and Dragana. The genotypes were grown after four previous crops and four levels of mineral fertilization. The effect of the year and the fertilization on the total biomass formed by the investigated cultivars was analyzed. It was found that the year conditions and the mineral fertilization had major influence on the dry matter accumulation in wheat. The combined interactions of genotype, year and fertilization were significant at all stages of the ontogenetic development of the cultivars. Total biomass formation was ongoing throughout the entire vegetation period, being most intensive at heading – 10 days after heading. After this stage the dry matter accumulation rate slowed down till full maturity.

Keywords: biomass; fertilization; wheat

Date published: 2017-07-12