Abstract
SummaryThis research was aimed at determining the influence of various forms, diverse doses, and dates of application, of nitrogen fertilisation and foliar nutrition on the amount and structure of carrot yield. Two field experiments [Experiment I (2003 – 2005) and Experiment II (2004 – 2005)] with carrot ‘Kazan F1’ were conducted at Trzciana (50°06' N; 21° 85'E) in Poland. Both Experiments were set up as split-plots in a randomised design. Two sub-blocks were identified in both Experiments: (A) without foliar nutrition; and (B) sub-blocks with foliar nutrition in which plants were sprayed three-times with 2% (w/v) urea, then a 1% (v/v) solution of multi-component ‘Supervit R’ fertiliser; and again with 2% (w/v) urea. Plots with various nitrogen fertilisation were distinguished within both sub-blocks in both Experiments. The treatments in Experiment I consisted of: (i) control; (ii) 70 kg N ha–1 as Ca(NO3)2; (iii) 70+70 kg N ha–1 as Ca(NO3)2; (iv) 70 kg N ha–1 as (NH4)2SO4; and (v) 70+70 kg N ha–1 as (NH4)2SO4, where the 70 kg N ha–1 was applied before sowing, and the 70+70 kg N ha–1 was applied before sowing and as a top dressing, respectively. The treatments in Experiment II consisted of: (i) control; (ii) 35+35 kg N ha–1 as ENTEC-26 [solid fertiliser containing 26% (w/w) N (7.5% N-NO3, plus 18.5% N-NH4), 13% (w/w) S, and the nitrification inhibitor, 3,4-dimethylpyrazol phosphate (DMPP)]; (iii) 70+70 kg N ha–1 as ENTEC-26; (iv) 105+105 kg N ha–1 as ENTEC-26; (v) 35+35 kg N ha–1 as NH4NO3; (vi) 70+70 kg N ha–1 as NH4NO3; and (vii) 105+105 kg N ha–1 as NH4NO3, where the 35+35, 70+70, and 105+105 kg N ha–1 treatments were applied before sowing and as a top dressing, respectively. In Experiment I, nitrogen fertilisation was found to have no effect on carrot yield, irrespective of foliar nutrition. Foliar nutrition caused a rise in carrot storage root yield. In Experiment II, the highest marketable yield and total yield of carrot, as well as biological yield (leaves + storage roots), were produced using of 35+35 kg N ha–1 as ENTEC-26. Foliar nutrition decreased the marketable yield of carrot to 4.2 t ha–1. Neither Experiment showed any statistically significant interaction between foliar nutrition and fertilisation on leaf yield, marketable or total yields of carrot storage roots, biological yield, or on the proportion of marketable yield in the total yield of storage roots.
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Claims 6
Claim · model-written summary
In Experiment I nitrogen fertilisation had no effect on carrot yield.
- Taxon
- carrot
Daucus carotae0 - Treatment
- nitrogen fertilisatione0
- Outcome
- carrot yielde0
- Direction
- no effecte0
- Qualifier
- irrespective of foliar nutritione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In Experiment I, nitrogen fertilisation was found to have no effect on carrot yield, irrespective of foliar nutrition.”
Claim · model-written summary
Foliar nutrition increased carrot storage root yield.
- Taxon
- carrotDaucus carotae0
- Treatment
- Foliar nutritione0
- Outcome
- carrot storage root yielde0
- Direction
- risee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar nutrition caused a rise in carrot storage root yield.”
Claim · model-written summary
35+35 kg N ha–1 ENTEC-26 produced the highest marketable and total carrot yields.
- Taxon
- carrotDaucus carotae0
- Treatment
- 35+35 kg N ha–1 as ENTEC-26e0
- Outcome
- marketable yield and total yield of carrote0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest marketable yield and total yield of carrot, as well as biological yield (leaves + storage roots), were produced using of 35+35 kg N ha–1 as ENTEC-26.”
Claim · model-written summary
35+35 kg N ha–1 ENTEC-26 produced the highest biological yield.
- Taxon
- carrotDaucus carotae0
- Treatment
- 35+35 kg N ha–1 as ENTEC-26e0
- Outcome
- biological yield (leaves + storage roots)e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest marketable yield and total yield of carrot, as well as biological yield (leaves + storage roots), were produced using of 35+35 kg N ha–1 as ENTEC-26.”
Claim · model-written summary
Foliar nutrition decreased marketable carrot yield to 4.2 t ha–1.
- Taxon
- carrotDaucus carotae0
- Treatment
- Foliar nutritione0
- Outcome
- marketable yield of carrote0
- Direction
- decreasede0
- Value
- 4.2 t ha–1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar nutrition decreased the marketable yield of carrot to 4.2 t ha–1.”
Claim · model-written summary
Neither experiment found significant foliar nutrition by fertilisation interaction for listed yield traits.
- Taxon
- carrotDaucus carotae0
- Treatment
- foliar nutrition and fertilisatione0
- Outcome
- leaf yield, marketable or total yields of carrot storage roots, biological yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither Experiment showed any statistically significant interaction between foliar nutrition and fertilisation on leaf yield, marketable or total yields of carrot storage roots, biological yield, or on the proportion of marketable yield in the total yield of storage roots.”
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