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.

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