EFFECT OF SPRING NITROGEN FERTILIZATION ON YIELD AND OIL CONTENT OF OILSEED RAPE

Monitoring the effect of divided and single dose of nitrogen on yield and oil content of oilseed rape (Brassica napus L.) was the aim of experiment. The plot-scale experiment was based in year 2013 in terms of agricultural cooperative in Mojmirovce. Hybrid Artoga was used. There were three treatments of fertilization with size 600 m(2) experimental plots in three replications, in this experiment. First treatment was unfertilized control treatment. The second treatment was fertilized by divided dose of nitrogen 160 kg.ha(-1) and the third treatment was fertilized by single dose 160 kg.ha(-1) N. The lowest yield of rapeseed 3.41 t.ha(-1) was noticed at unfertilized control treatment 1. The highest yield 5.04 t.ha(-1) was found at the treatment 3, where single dose of nitrogen was applied. The lowest oil content 45.91 % was observed at treatment 2, where the divided dose of nitrogen 160 kg.ha(-1) was used. Oil content 45.99 % was at treatment 3, where single dose of nitrogen 160 kg.ha(-1) was applied. The highest oil content 47.41 % was found at unfertilized control treatment.