ВЛИЯНИЕ СРОКОВ ПОСЕВА И ЗАЩИТЫ РАСТЕНИЙ ПРИ ВОЗДЕЛЫВАНИИ ЯРОВОГО РАПСА НА СЕМЕНА

Abstract

The purpose of the research is yield increasing of spring rape using the Clearfield system in Ryazan region. The research was carried out in 2016-2019 within the conditions of the experimental agrotechnological station of the Federal State Budgetary EDUCATIONAL Institution of Ryazan region on gray forest clay loam soil. The experiment revealed that during the second and third sowing, the OZORNO hybrid is more precocious, the growing period of which amounts to 85-83 days, which is 10-6 days less than that of the Salsa CL one (95-89 days). On average, the highest yield of spring rape was obtained at the first sowing period (first decade of May) on the base of all experi-ments: Salsa CL – 20.8 C / ha, Ozorno – 19.5 C / ha, Ratnik – 19.0 C / ha. The maximum yield (24.8 C / ha) was obtained in 2016 from Salsa CL hybrid using the Clearfield system. On average, the indicators of yield growth, de-velopment and formula of the domestic Ratnik variety were not inferior to ones of the Ozorno hybrid. The variants on the base of Clearfield system showed lower weeding, and all groups of weeds were killed or severely sup-pressed. 
 In the conditions of Russian southern part of the non-Chernozem zone, the first decade of May for spring rape sow-ing in the most favorable period, in regard to yield using the Clearfield system. The maximum profitability (108.5%) is marked on the variant with the Salsa KL hybrid of the first sowing period.