Abstract
In current study, dry–matter accumulation (DMA), pre– and post–anthesis nitrogen (N) accumulation, N translocation (NT) and dry–matter partitioning by sunflower seeds was investigated under three sowing dates (January 20, February 10 & March 2), two intra–row spacings (30 & 24 cm) and four nitrogen doses (0, 45, 60 & 75 kg ha–1) in two alluvial soils. Early sowing resulted in higher DMA and NT; leading to higher nitrogen use efficiency (NUE) that could be associated with higher pre–anthesis N accumulation. The closer intra–row spacing resulted in higher DMA by all plant parts except seed. Each graded N dose improved DMA, but improvement in dry–matter partitioning to seed was significant up to 60 and 75 kg N ha–1 during 2014 and 2015, respectively owing to higher NT under respective treatments. NUE was highest at 60 kg N ha–1 during both years.
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Claims 8
Claim · model-written summary
Early sowing produced higher dry matter accumulation.
- Taxon
- Spring sunflower
Helianthus annuust0 - Treatment
- Early sowinge0
- Outcome
- DMAe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing resulted in higher DMA and NT”
t0“Spring sunflower”
Claim · model-written summary
Early sowing produced higher nitrogen translocation.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- Early sowinge0
- Outcome
- NTe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing resulted in higher DMA and NT”
t0“Spring sunflower”
Claim · model-written summary
Early sowing led to higher nitrogen use efficiency.
- Taxon
- Spring sunflowerHelianthus annuust0
- Outcome
- nitrogen use efficiency (NUE)e0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leading to higher nitrogen use efficiency (NUE) that could be associated with higher pre–anthesis N accumulation”
t0“Spring sunflower”
Claim · model-written summary
Closer intra-row spacing increased dry matter in all parts except seed.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- closer intra–row spacinge0
- Outcome
- DMA by all plant parts except seede0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The closer intra–row spacing resulted in higher DMA by all plant parts except seed”
t0“Spring sunflower”
Claim · model-written summary
Each graded nitrogen dose improved dry matter accumulation.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- Each graded N dosee0
- Outcome
- DMAe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each graded N dose improved DMA”
t0“Spring sunflower”
Claim · model-written summary
Nitrogen improved seed dry matter partitioning significantly up to 60 kg N ha–1 in 2014.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- 60e0
- Outcome
- dry–matter partitioning to seede0
- Direction
- improvemente0
- Value
- 60e0
- Qualifier
- 2014e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improvement in dry–matter partitioning to seed was significant up to 60 and 75 kg N ha–1 during 2014 and 2015, respectively”
t0“Spring sunflower”
Claim · model-written summary
Nitrogen improved seed dry matter partitioning significantly up to 75 kg N ha–1 in 2015.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- 75 kg N ha–1e0
- Outcome
- dry–matter partitioning to seede0
- Direction
- improvemente0
- Value
- 75 kg N ha–1e0
- Qualifier
- 2015e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improvement in dry–matter partitioning to seed was significant up to 60 and 75 kg N ha–1 during 2014 and 2015, respectively”
t0“Spring sunflower”
Claim · model-written summary
Nitrogen use efficiency peaked at 60 kg N ha–1 in both years.
- Taxon
- Spring sunflowerHelianthus annuust0
- Treatment
- 60 kg N ha–1e0
- Outcome
- NUEe0
- Direction
- higheste0
- Value
- 60 kg N ha–1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NUE was highest at 60 kg N ha–1 during both years”
t0“Spring sunflower”
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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.