Yield and grain quality of springwheat in relation to pre-sowing seed preparation

The purpose of research is to study the effect of fungicides and agrochemicals during presowing treatment of spring wheat seeds in pure form and in tank mixtures on the yield and quality of grain in the conditions of the Irkutsk Region. The objects of study are the variety of spring soft wheat Buryatskaya ostistaya, chemical fungicides - Oplot, Lamador, Maxim, Maxim Plus, the biological fungicide Bisolbi San, the plant growth regulator Melafen and the fertilizer based on humic acids added with macro- and microelements Gumilux. Vitreousness, gluten content, nature, weight of 1000 grains were determined according to GOST 10987-76, GOST 54478-2011, GOST 54895-2012, GOST 10842-89; the content of starch, phosphorus, crude fat, protein was determined on an INFRALYUM infrared analyzer. The yield of spring wheat in the experimental variants exceeded the values in the control, but the increase in different years of research was not always reliable. The increase in yield in general was accompanied by an increase in the nature by 2-20 g/l, an increase in the mass of 1000 grains by 1.1-4.5 g, vitreousness by 7-14 %, an increase in starch content by 0.6-1.5 %. Fungicides and agrochemicals did not have a noticeable effect on the content of phosphorus and fat, but contributed to a slight decrease in protein in grain - by 0.3-1.2 %. The best in terms of influence on the yield of wheat and the quality of its grain were tank mixtures of the fungicide Maxim Plus with Melafen, Gumilux and Bisolbi San; the yield increase averaged 6.4 over three years; 6.9 and 5.7 q/ha, respectively, the increase in nature is 10-12 g/l, the weight of 1000 grains is 2.3-4.5 g, vitreousness is 12-14 %, gluten is 1.1-2, 6 %.