The effect of various nitrogen fertilization and foliar nutrition regimes on the concentrations of nitrates, ammonium ions, dry matter and N-total in carrot (Daucus carota L.) roots

Sylwester Smoleń , Włodzimierz Sady


Two field experiments (Experiment I in 2003–2005 and Experiment II in 2004–2005) with carrot c.v. ‘Kazan F1’ were conducted at Trzciana village (50°06′N, 21°85′E). The experiments were arranged in a split-plot design with four replications. Two sub-blocks were identified in both experiments: I, without foliar nutrition; II, receiving plant foliar nutrition. The plants were sprayed three times alternately with: 2% urea solution, 1% solution of multi-component ‘Supervit R’ fertilizer (produced by Intermag, Poland) and again with 2% urea solution. Combinations with diversified nitrogen fertilization were distinguished within both sub-blocks. Experiment I comprised of: (1) Control, (2) Ca(NO3)2 70, (3) Ca(NO3)2 70 + 70, (4) (NH4)2SO4 70 and (5) (NH4)2SO4 70 + 70. Experiment II included: (1) Control, (2) ENTEC-26 35 + 35, (3) ENTEC-26 70 + 70, (4) ENTEC 26 105 + 105, (5) NH4NO3 35 + 35, (6) NH4NO3 70 + 70, (7) NH4NO3 105 + 105. Where 70 kg N ha−1 was used before sowing, whereas 35 + 35, 70 + 70 and 105 + 105 kg N ha−1 were applied before sowing and as top dressing. Solid nitrogen fertilizer was added to the soil (produced by): Ca(NO3)2, Yara International ASA (Hydro); (NH4)2SO4, Zakłady Azotowe in Tarnów, Poland; NH4NO3, Zakłady Azotowe in Puławy, Poland; and ENTEC-26, COMPO GmbH & Co. KG, Germany. The research aimed at determining the effect of diversified nitrogen fertilization and foliar nutrition on NO3−, NH4+, N-total and dry matter (d.m.) concentrations in carrot, and N uptake by storage roots. In Experiment I, nitrogen fertilization did not affect NO3− concentration, whereas in Experiment II, the applied N treatment increased NO3− concentration in carrot in relation to the control, except for the storage roots of plants fertilized with ENTEC-26 35 + 35. Nitrogen fertilization applied in both experiments caused a significant increase in N-total concentration in carrot and N uptake by storage roots in comparison with the control plants. In both experiments, nitrogen fertilization had a different effect on the concentrations of NH4+ and d.m. in carrot. What is more, foliar nutrition treatments in both experiments had a different effect on the concentrations on NO3−, N-total, d.m. in carrot and N uptake by carrot storage roots.
Author Sylwester Smoleń (FoBaH / IoPBaB)
Sylwester Smoleń,,
- Institute of Plant Biology and Biotechnology
, Włodzimierz Sady (FoBaH / IoPBaB)
Włodzimierz Sady,,
- Institute of Plant Biology and Biotechnology
Journal seriesScientia Horticulturae, ISSN 0304-4238, e-ISSN 1879-1018, (A 30 pkt)
Issue year2009
Publication size in sheets0.6
Keywords in EnglishNitrogen fertilization, Foliar nutrition, Nitrate, Nitrogen uptake, Inhibitor of nitrification, DMPP
ASJC Classification1108 Horticulture
Languageen angielski
Score (nominal)30
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2014 = 1.445; WoS Impact Factor: 2009 = 1.197 (2) - 2009=1.485 (5); WoS Citations = 13
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