Abstract
The article presents the results of a three-year study, which analyzed agronomic management in the production of winter oilseed rape (WOSR) in different tillage systems. The effects of weed control and growth regulation in fall on the number of rosette leaves, epicotyl length, root collar diameter, taproot length, rosette weight, root weight, and the overwintering success of WOSR plants in different tillage systems were determined in the study. A field experiment was conducted at the University’s Agricultural Experiment Station in Bałcyny in north-eastern Poland in three growing seasons (2016/2017–2018/2019). The experiment had a mixed 21 × 32 factorial design with two replications, where one factor was evaluated at two levels, and two factors were evaluated at three levels. The experimental factors were: A—tillage: (A0) strip-till, (A1) low-till, and (A2) conventional tillage; B—weed control: (B0) pre-emergent, (B1) foliar, and (B2) sequential; C—growth regulation: (C0) none and (C1) in fall. Winter oilseed rape plants developed rosettes with the optimal morphometric parameters in the strip-till system. Sequential and foliar application of herbicides decreased the dry matter (DM) content of leaf rosettes (by approx. 18%). The application of the growth regulator in BBCH stages 14–15 increased taproot length by 3%.
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