Improving the technology of amaranth cultivation for grain and green mass in the conditions of the southern Non-Chernozem zone

In a two-factor field experiment on leached medium-loamy chernozem in the conditions of the south of the Non-Chernozem zone of Russia, an assessment was made of the effectiveness of the complex use of herbicides and chelated boron fertilizer in the cultivation of amaranth ( Amaranthus L. sp .) for grain and green mass. The amaranth variety Voronezhsky 36 was used as the object of the study. It was found that in amaranth crops with a complex type of weed infestation, including annual monocotyledonous and dicotyledonous weeds, as well as perennial root-suckering weeds, the greatest biological and agronomic effect with the least suppression of cultivated plants was established for the herbicide Traser (clomazone 480 l/ha) at a dose of 0,3 l/ha, from the use of which the number and weight of weeds decreased by 91 and 93%, respectively, and the grain harvest increased compared to the control by 0,35 t/ha, green mass — by 5,4 t/ha. The use of a tank mixture of herbicides Demetra + Quickstep reduced the weed infestation of the crop, but had a herbotoxic effect on amaranth plants and reduced their productivity. Treatment of amaranth crops with chelated boron fertilizer (150 g/l) suppressed the inhibitory effect of the herbicide Tracer, contributed to better plant development and the formation of additional grain and green mass. The highest yield of amaranth grain (1,80 t/ha) was provided by the combination of Traser 0,3 l/ha + chelated boron fertilizer 2 l/ha, green mass (30,2 t/ha) — the combination of Traser 0,3 l/ha + chelated boron fertilizer 3 l/ha.