Reakcja łubinu wąskolistnego (Lupinus angustifolius L.) na dawkę startową azotu

Abstract

A replicated field trial was carried out in the years 2011– 2013 to specify the reaction of narrow-leaved lupine cultivars Neptun and Kalif to starter nitrogen application (30 kg ha-1) vs. no-nitrogen control treatment. It was observed that nitrogen in- creased lodging and prolonged plant vegetation period. Starter nitrogen considerably increased the number of pods on a plant and the number of seeds. The yield increase in starter-N treat- ment was 0.32 t ha-1 or 10.4% over the no-N control. The yield of narrow-leafed lupine varied during the experiment period from 2.94 t ha-1 in 2011 to 3.44 t ha-1 in 2012. The content of crude protein averaged 31.4% and did not depend on starter N fertiliza- tion. Cv. Neptun compared to cv. Kalif showed considerably high- er values of thousand-seed weight, higher crude protein content, shorter vegetation period, higher lodging degree and lower num- ber of pods per plant. The effect of starter nitrogen application on studied parameters was the same for both cultivars.