ЗАСОРЕННОСТЬ И УРОЖАЙНОСТЬ САХАРНОЙ СВЕКЛЫ ПРИ РАЗЛИЧНЫХ СПОСОБАХ УХОДА ЗА ПОСЕВАМИ

Abstract

In field experiments carried out in the conditions of the forest-steppe of the Middle Volga region, the influence of various methods of caring for crops on the productivity of sugar beet was studied. For the period from 1998 to 2018.weed infestation of sugar beet crops increased from 52.5% to 55.3%, while the number of all root weeds increased from 1.1 to 6.1 pcs/m2, and sow thistles and plume thistles - from 3.20 to 7.05 pcs/m2. It was noted that at the beginning of the growing season, the number of weeds increased sharply (by 2.8 times) from the phase of mass shoots of the crop to the beginning of the closing of leaves in the inter-row spaces, then the rate of emergence of new weeds decreased, and starting from the phase of opening the rows of sugar beet it increased again (by 1, 3 times).Сounting the number of weeds made it possible to establish that the implementation of three chemical treatments leads to an increase in the number of weeds by the time sugar beets are harvested. If in the initial period of sugar beet growth the number of weeds in the variant with three inter-row treatments was more than 90 pcs/m2, in the case of chemical treatments it was more than 60 pcs/m2, then the opposite was observed during the harvesting period. As a result of the research, it was found that the highest yield of root crops was obtained during three herbicidal treatments.