The dependence of the duration of vegetation period of spring soft wheat from the place of its cultivation

The purpose of the researches was to reveal the distinctions in variability of duration of vegetative period depending on the precocity of a variety, the year of cultivation, the predecessor and geographical point. On the basis of the analysis of the results of three years' researches of 16 varieties of wheat on eight contrast on soil climatic conditions testing plot on two predecessors tendencies of change of duration of vegetative period of studied varieties in time and space were revealed. It was defined that the main share of variability of duration of vegetative period was connected with geographical point of cultivation of a spring wheat (27.8 %), genotypic features of varieties (22.4 %) and interaction of two factors "years × geographical point" (22.7 %). Thecontribution of the factor "predecessor" and "years" in the variability of vegetative period made respectively 4.0 and 2.2 %. On the duration of vegetative period between geographical points wheat varieties depending on weather conditions of vegetation had the difference from 10-23 days (2017) to 21-31 days (2018)...