Abstract
Corn needs high amount of nitrogen and this element in soil shows fluctuation due to humidity degree. In addition, cultivars show different performance to N supply. This work aimed to study nitrogen doses, use and efficiency in six corn cultivars, cropped in a cerrado soil vegetation area, Selviria-MS, in a clayey, hipodistrophyc, alic, red latosol (Haplustox). The plots were constituted of six 5-meter-long lines spaced 0.80 m, with 5 plants per meter.It was used a completely randomized block design in a factorial scheme with 4 nitrogen rates and 6 cultivars in 6 replications . N was applied at rates of 0, 30, 90 and 180 kg ha-1, to 30 kg ha-1 at sowing (control did not receive N) and the rest in side-dressing at 6-8 leaf stage. It was evaluated the number of lines per ear and grains per ear line, diameter of colm, size of ear, number of ear per 10 m, mass of 100 grains, dry mass of plant at flowering and physiological maturation, grain yield and use and efficiency of N, obtained by relation between grain yield and N applied to soil, besides the components of N efficiency. The cultivars showed statistical difference among them and the highest estimated yield was reached with 110 kg ha-1 of nitrogen. The N use efficiency decreased every time there was a dose increase .The DKB 333B hybrid showed the highest efficiency and the BR 106 and the Sol da Manhã hybrids the lowest one.
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Claims 6
Claim · model-written summary
Corn cultivars differed statistically in performance.
- Taxon
- corn
Zea mays subsp. mayse1 - Outcome
- statistical difference among theme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivars showed statistical difference among them”
e1“six corn cultivars”
Claim · model-written summary
The highest estimated corn yield occurred with 110 kg ha-1 nitrogen.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- 110 kg ha-1 of nitrogene0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest estimated yield was reached with 110 kg ha-1 of nitrogen”
e1“six corn cultivars”
Claim · model-written summary
Nitrogen use efficiency decreased with each increase in nitrogen dose.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- dose increasee0
- Outcome
- N use efficiencye0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N use efficiency decreased every time there was a dose increase”
e1“six corn cultivars”
Claim · model-written summary
DKB 333B had the highest nitrogen use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Material
- DKB 333Be0
- Outcome
- efficiencye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DKB 333B hybrid showed the highest efficiency”
e1“six corn cultivars”
Claim · model-written summary
BR 106 had among the lowest nitrogen use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Material
- BR 106e0
- Outcome
- efficiencye2
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the BR 106 and the Sol da Manhã hybrids the lowest one”
e1“six corn cultivars”
e2“highest efficiency”
Claim · model-written summary
Sol da Manhã had among the lowest nitrogen use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Material
- Sol da Manhãe0
- Outcome
- efficiencye2
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the BR 106 and the Sol da Manhã hybrids the lowest one”
e1“six corn cultivars”
e2“highest efficiency”
The same questions in other papers
nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
- negative
- no effect
- negative
2,181 papers more in this group
See all 2,185 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.