DOI: n/a
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It was studied the influence of the preparations with different biological effect: Atonic (growth regulator, 0.06 l/da), Masterblend (combined leaf fertilizer, 160 g/da) and Confidor 70 WG (insecticide, a. s. imidacloprid, l5 g/da) on the contents of leaf pigments and some biochemical characteristics in spring vetch in 2007-2009 period. The treatment was conducted once (at the stage of budding and at the stage of flowering) and twice (at budding and flowering). It was found that the use of preparations alone and in combination increased the synthesis of leaf pigments (chlorophyll a, chlorophyll b and and carotenoids) by 6.2 to 27.3%, as the the highest increase was found after the combined use of Confidor and Atonic. The treated variants were with decreased yield of crude protein, calcium and phosphorus in aboveground biomass and the yield of crude protein outweighed the average value of control by 5.0 (Atonic) to 16.6% (Confidor+Atonic).