WINTER RESISTANCES OF OILSEED CANOLA AND RESEEDING OF DAMAGED BY FROST AREAS WITH SPRING CROPS PUBLISHED

Grozi DELCHEV delchevgd@dir.bg
During 2016 - 2018 was conducted a field experiment. It was carried out a field experiment as a block method in 4 repetitions, on a 15 m2 harvesting area. It was investigated 8 winter oilseed canola hybrids (Brassica napus L.): 3 conventional hybrids - PT271, Dariot and Cesario; 1 conventional Maximus hybrid – PX113; 3 Clearfield hybrids - PT279CL, Fenix CL and Aquarelle CL; 1 Clearfield Maximus hybrid - PX125CL. On areas with damaged by frost winter canola, at the spring were sowed and investigated: 1 conventional spring oilseed canola hybrid - Axana; 1 forage pea cultivar - Mir (Pisum sativum L.); 1 chickpea cultivar - Kabule (Cicer arietinum L.); 1 coriander cultivar - Lozen (Coriandrum sativum L.); 1 milk thistle cultivar - Silmar (Silybum marianum Gaertn.). It was investigated the changes occurring in seed yields under the influence of weather conditions in all variants. Mathematical data processing was done by the method of analysis of variance. Conventional hybrids PT271 and Dariot, conventional Maximus hybrid PX113, Clearfield hybrids PT279CL and Fenix CL and Clearfield Maximus hybrid PX125CL, overwinter successfully despite of adverse weather conditions, due to its very good winter resistance and the applied chemical treatments. Through some agricultural activities adverse weather conditions can be reduced to an acceptable minimum. Seed yields of spring oilseed canola hybrid Axana with optimal sowing density are lower than the yields of winter hybrids Cesario and Aquarelle CL with minimum sowing densities. It is recommended to harvested crops of winter canola hybrids with minimum density to 15 plants / m2 instead they reseeding with spring canola hybrids. After plowing areas with damaged by frost winter canola hybrids without any problems can be sown forage pea. After plowing of canola crops, it is more appropriate to sow chickpea in which weed control is carried out by soil treatment with herbicide Merlin flex, followed by foliar treatment with herbicide tank mixture Challenge + Shadow. Coriander and milk thistle are suitable crops for sowing on areas after damaged by frost winter oilseed canola.
winter resistance, oilseed canola, forage pea, chickpea, coriander, milk thistle
Field crops and pastures
Presentation: poster

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