Influence of non-root infusions with complex multifunctional preparations on the level and qualitative composition of the chlorophyll complex in sunfl ower plants

The article presents the results of studies determining the content of chlorophyll (total and fractional) depending on the background of mineral nutrition and foliar dressing with multifunctional fertilizers Wuksal® and Helafi t Combi®. In conditions of fi eld experiment on black earth soils of the low-humus zone of the Steppe of Ukraine it is proved that the improvement of the nutrient regime of sunfl ower agrocenosis (application of mineral fertilizers with the norm N30P45 in combination with the multifunctional combined fertilizer Helafi t Kombi®) increases the total chlorophyll content by 61% on average over the years of research. This increases the content of the chlorophyll fraction "a" (by 85% compared with the fraction "b") and the ratio of the fraction "a" to "b" increases from 2.26 to 4.01. This process is accompanied by the increase in the yield of sunfl ower by 39%.