Abstract
The influence of split nitrogen applied via fertigation on the culture of early-cycle BRS 323 sunflower was evaluated. The experiment was conducted at the Federal University of Ceará, Brazil, in a randomized block design, with five treatments and five repetitions. The treatments corresponded to the recommended N doses: 50; 25; 12.5; 6.25 and 3.2 kg ha-1. At 55 days after sowing, the following variables were evaluated: thousand seed mass, productivity, seed oil content, head dry mass, leaf dry mass and leaf area as a function of the number of N applications via fertigation. Yield, seed oil content and head dry mass were influenced by N treatments at the 5% level, while thousand seed mass, leaf dry mass and leaf area were significant at 1%. The application of parceled nitrogen fertilization by fertigation can be recommended to sunflower producers, because it can increase the production of this crop, since the parceled application of N positively influences the behavior of the following variables: DMLeaf; Leaf area; 1000SM, PROD, SOC and MS Head.
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Claims 5
Claim · model-written summary
Nitrogen treatments significantly influenced sunflower yield, seed oil content and head dry mass at the 5% level.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- N treatmentse0
- Outcome
- Yield, seed oil content and head dry masse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield, seed oil content and head dry mass were influenced by N treatments at the 5% level”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Nitrogen treatments significantly influenced thousand seed mass, leaf dry mass and leaf area at the 1% level.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- N applications via fertigatione1
- Outcome
- thousand seed mass, leaf dry mass and leaf areae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thousand seed mass, leaf dry mass and leaf area were significant at 1%.”
e1“as a function of the number of N applications via fertigation”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Split nitrogen fertigation positively influenced sunflower leaf dry mass, leaf area and thousand seed mass.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- parceled application of Ne0
- Outcome
- DMLeaf; Leaf area; 1000SMe0
- Direction
- positively influencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the parceled application of N positively influences the behavior of the following variables: DMLeaf; Leaf area; 1000SM, PROD, SOC and MS Head.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
Split nitrogen fertigation positively influenced sunflower productivity, seed oil content and head dry mass.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- parceled application of Ne0
- Outcome
- PROD, SOC and MS Heade0
- Direction
- positively influencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the parceled application of N positively influences the behavior of the following variables: DMLeaf; Leaf area; 1000SM, PROD, SOC and MS Head.”
t0“sunflower (Helianthus annuus)”
Claim · model-written summary
The authors recommend split nitrogen fertigation for sunflower producers.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- application of parceled nitrogen fertilization by fertigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of parceled nitrogen fertilization by fertigation can be recommended to sunflower producers”
t0“sunflower (Helianthus annuus)”
The same questions in other papers
nitrogen · growth · Helianthus annuus (common sunflower)Results differ
62 papers in the same direction as this paper · 12 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
72 papers more in this group
See all 76 papers →nitrogen · soil: chemistry · Helianthus annuus (common sunflower)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
2 papers more in this group
See all 6 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.