Comparative assessment of weed infestation of agrophytocenoses under different systems of main cultivation and fertilization of typical chernozem in crop rotation

Segetal vegetation in agricultural crops is a limiting factor in most cases, so the aim of the research was to compare four main tillage systems and four fertilization systems in terms of their anti-weed efficiency and crop rotation productivity, establish the optimal combination of cultivation and fertilization systems. Four-year (2020-2023) studies on the typical deep, low-humus, medium-loam black soils of the Bila Tserkva National Agrarian University experimental field have established that in a stationary field, a five-field crop rotation with grain rows. indicators of weediness did not differ significantly for shelf-disk (control) and differentiated (shelf-without-shelf-disk) treatments. They increase significantly during shelfless disc and disc processing. Regular changes in actual and potential weediness depending on fertilization systems have not been established. The raw weight of one weed plant is the lowest than differentiated one, the highest is under continuous disk cultivation. It increases with the increase in the rate of applied fertilizers. 165 agrobiologiya.btsau.edu.ua Агробіологія, 2024, № 2 With an increase in the rate of applied fertilizers, it grows. With non-shelf-disk and disk tillage, crop rotation productivity decreases significantly. In terms of dry matter output of commercial products of agrophytocenosis, the crop rotation differentiated soil cultivation system exceeds the control variant, but not significantly (the difference did not exceed 0.25 t/ha with R&D 0.05 0.30 t/ha. The output of dry matter of commercial and non-commercial products is monitored by differentiated shelf-disc (control) only in fertilized areas. With an increase in the fertilizer rate, the wet mass of weeds in soybean and winter wheat agrophytocenosis decreases, while that of corn and sunflower increases. Key words: soil, crop rotation, fertilizers, cultivation, agrophytocenosis, weed infestation, productivity.