Abstract. Plants supplied with Entec-26 produced similar yield in comparison to ammonium nitrate, and calcium nitrate but contained lower amounts of nitrates, especially in roots. The maximum yield of red beet plants grown for bunches was produced by application of 150 kg N·ha^-1 but it was association with the highest level of nitrates accumulation in leaves and roots.

The effect of nitrogen fertilization on yielding
and biological value of red beet grown for bunches

Summary

In the experiment conducted in 2005-2006 there was evaluated the yield and nitrates accumulation in red beet grown for bunches under influence of nitrogen form and rate. The highest total and marketable yield of plants was produced by application of ammonium nitrate and calcium nitrate followed by Entec-26 which appeared to be preferable for the decrement of nitrates in plants. The increment of N rate from 50 to 150 kg N·ha^-1 caused the significant enhancement of red beet yield as well as nitrates accumulation especially in roots; split applications of nitrogen used at the dose of 150 kg N·ha^-1 showed little effect on red beet yield and reduction of nitrates content in comparison to the preplant application of its whole amount.