THE INFLUENCE OF BIOSTIMULANTS OF DIFFERENT ORIGIN ON BIOCHEMICAL COMPOSITION OF GREEN MASS OF ONIONS

the article gives the efficiency assessment of some natural bio-stimulants usage at the element composition herbage study of bulb onion (Allium cepa L.) at the example of the breed Stuttgarter Riesen. The experiment was conducted for 2016, in the laboratory of agroecology of the Institute of Agroecological Technologies of Krasnoyarsk State Agrarian University. Under identical conditions the effect of six different preparations was hydroponically compared: Ferovit (0.1% aqueous solution), Appin- extra (0.05 ml / 200 ml of water), НВ-101(2 drops of preparation per 1 liter of water), Novosil (aqueous emulsion, 2 drops of preparation per 1 liter of water), as well as with aqueous extracts of onion aril (10 g of husk per 1 liter of water) and honey of various herbs (0,5 teaspoon honey per 1 liter of water). In the control option we used pure water without admixtures. Biochemical indicators including micro- and macroelements (metals) content in the produced green onion leaves were assessed with aid of atomic- absorption analyzer PinAAcle 900T. Bio-stimulants usage in this experiment didn’t stimulate the ash elements, nitrogen and protein accumulation as related to the control option. Preparation usage in the experiment made a noticeable impact on the micro- and macro-elements content. In all experimental variants a significant decrease of protein content (up 7,00- 15,07%) compared with the control (16.68%) was observed. The maximum positive effect at the metal content quantitative analysis was noted in the options with usage of Novosil and Ferovit: Co was above the control of 1.91 and 1.52 times; Zn – 1.09 and 1.08; Fe– 1,68 and 1,23; Na– 1,24 and 1,14 times respectively. Leaves humidity increase negatively affected the quantitative correlation of the most biochemical indicators (correlation coefficient (r) varied from -0,7 to 0,3). There have been found mainly significant positive interrelations (r up to 0,9) between the metals content in the composition of onion biomass. Interrelations between potassium content and other elements (zinc, manganese, cobalt, iron, sodium) had acute negative character (r from -0,3 up to -0,9). The use of the studied drugs (with the exception of Epin) stimulated the accumulation of a mass of green onion leaves. The greatest significant effect was observed when applying Novosil Ferovita and – 31.1 and 44.6 g / vessel, respectively, at 22.7 g / vessel in the control. On an optimum combination of the received biochemical indicators the most effective option among all used preparations the option with Ferovit's usage can be considered.