Effect of increasing spring doses of nitrogen on yield and oil content in seeds of oilseed rape (Brassica napus L.)

Mária Varényiová, Ladislav Ducsay


Received: 2016-02-17   |   Accepted: 2016-03-11   |   Available online: 2016-05-30


The aim of the experiment was monitoring importance of nitrogen in nutrition of oilseed rape (Brassica napus L.) as well as effect of rising doses of nitrogen on yield and oiliness of rapeseed. The plot–scale experiment was based in years 2013–2014 and 2014–2015 in terms of agricultural cooperative in Mojmírovce. Hybrid Artoga was seeded. There were five treatments of fertilization and the block method of experimental plot size of 600 m2 in triplicate was used in this experiment. The first treatment was unfertilized control treatment. Other treatments were fertilized by increasing doses of nitrogen 120 kg.ha-1, 160 kg.ha-1, 200 kg.ha-1 and 240 kg.ha-1. Yield of seed and oil content were greatly influenced by climatic conditions. Both experimental years were not equable in precipitation and temperatures. The highest average yield (at 12% moisture) 4.33 t.ha-1 was found at treatment where the dose of nitrogen 200 kg.ha-1 was used. It means an increase by 81.93% compared to unfertilized control treatment. The positive correlation between yield and doses of nitrogen was proved in this experiment.  The highest average oil content 45.43% was reached at treatment 2. The negative correlation between oil content and dose of nitrogen was also confirmed in this experiment.

Keywords: oilseed rape, nitrogen nutrition, yield, oil content


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