Paper · 2011 · Notulae Scientia Biologicae

Effect of Defoliation and Fe and Mn Spraying on Quality and Quantity Characteristics of Sunflower (Helianthus annuus L.)

Farshid VAZIN; Mojtaba HASSANZADEHDELOUEI; Mohamadjavad KHERADMAND

10
claims
21
verbatim quotes
3
citations
2
research areas
✓
Open access · cc-by

Abstract

The study was aimed at identifying the amount of reduction in the negative effects of leaf removal on both quality and quantity of sunflower as a result of foliar application of Fe and Mn. Severe leaf removal reduced the seed yield and seed weight to 11% and 10.5% respectively. The use of Fe in comparison to control increased the seed yield and seed weight up to 12% and 10% respectively. The use of Mn in comparison to control caused an increase in seed number up to 11.6% but caused a reduction in seed weight to 10%. The use of Fe in normal foliar defoliation treatment (40% defoliation) caused a significant increase in seed yield but no significant effect was observed in sever defoliation treatment (80% defoliation). Although using Mn in all treatments led to a rise in seed yield, the effect was not significant, it could be concluded that the combined use of Mn and Fe had no significant influence on sunflower yield, so there might be an antagonistic effect between the two.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 10

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Severe leaf removal reduced seed yield, to 11%.

Taxon
SunflowerHelianthus annuust0
Treatment
Severe leaf removale1
Outcome
seed yielde1
Direction
reducede1
Value
11%e1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e1

“Severe leaf removal reduced the seed yield and seed weight to 11% and 10.5% respectively”

✓ located verbatim in the source · abstract, characters 189–277 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Severe leaf removal reduced seed weight, to 10.5%.

Taxon
SunflowerHelianthus annuust0
Treatment
Severe leaf removale1
Outcome
seed weighte1
Direction
reducede1
Value
10.5%e1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e1

“Severe leaf removal reduced the seed yield and seed weight to 11% and 10.5% respectively”

✓ located verbatim in the source · abstract, characters 189–277 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar Fe compared with control increased seed yield by up to 12%.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Fee2
Outcome
seed yielde2
Direction
increasede2
Value
12%e2
Comparator
controle2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e2

“The use of Fe in comparison to control increased the seed yield and seed weight up to 12% and 10% respectively”

✓ located verbatim in the source · abstract, characters 279–389 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar Fe compared with control increased seed weight by up to 10%.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Fee2
Outcome
seed weighte2
Direction
increasede2
Value
10%e2
Comparator
controle2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e2

“The use of Fe in comparison to control increased the seed yield and seed weight up to 12% and 10% respectively”

✓ located verbatim in the source · abstract, characters 279–389 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Foliar Mn compared with control increased seed number by up to 11.6%.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Mne3
Outcome
seed numbere3
Direction
increasee3
Value
11.6%e3
Comparator
controle3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e3

“The use of Mn in comparison to control caused an increase in seed number up to 11.6% but caused a reduction in seed weight to 10%”

✓ located verbatim in the source · abstract, characters 391–520 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Foliar Mn compared with control reduced seed weight to 10%.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Mne3
Outcome
seed weighte3
Direction
reductione3
Value
10%e3
Comparator
controle3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e3

“The use of Mn in comparison to control caused an increase in seed number up to 11.6% but caused a reduction in seed weight to 10%”

✓ located verbatim in the source · abstract, characters 391–520 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Foliar Fe in normal defoliation (40%) significantly increased seed yield.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Fee4
Outcome
seed yielde4
Direction
increasee4
Qualifier
40% defoliatione4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e4

“The use of Fe in normal foliar defoliation treatment (40% defoliation) caused a significant increase in seed yield”

✓ located verbatim in the source · abstract, characters 522–636 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Foliar Fe in severe defoliation (80%) had no significant effect on seed yield.

Taxon
SunflowerHelianthus annuust0
Treatment
use of Fee4
Outcome
seed yielde4
Direction
no significant effecte5
Qualifier
80% defoliatione5

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e4

“The use of Fe in normal foliar defoliation treatment (40% defoliation) caused a significant increase in seed yield”

✓ located verbatim in the source · abstract, characters 522–636 · show in text ↑
e5

“no significant effect was observed in sever defoliation treatment (80% defoliation)”

✓ located verbatim in the source · abstract, characters 641–724 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Foliar Mn in all defoliation treatments gave a rise in seed yield that was not significant.

Taxon
SunflowerHelianthus annuust0
Treatment
using Mn in all treatmentse6
Outcome
seed yielde6
Direction
risee6

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e6

“Although using Mn in all treatments led to a rise in seed yield, the effect was not significant”

✓ located verbatim in the source · abstract, characters 726–821 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Combined Mn and Fe had no significant influence on sunflower yield.

Taxon
SunflowerHelianthus annuust0
Treatment
combined use of Mn and Fee7
Outcome
sunflower yielde7
Direction
no significant influencee7

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Helianthus annuus
Helianthus annuus · TaxonJon Sullivan · Public domain · Wikimedia Commons ↗

Verbatim

t0

“Sunflower (Helianthus annuus L.)”

✓ located verbatim in the source · title, characters 88–120 · show in text ↑
e7

“the combined use of Mn and Fe had no significant influence on sunflower yield”

✓ located verbatim in the source · abstract, characters 850–927 · show in text ↑

iron atom · yield · Helianthus annuus (common sunflower)Results differ

13 papers: 12 positive, 1 negative or no effect

11 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

9 papers more in this group

See all 13 papers →

manganese atom · yield · Helianthus annuus (common sunflower)Positive and negative results

8 papers: 6 positive, 2 negative or no effect

5 papers in the same direction as this paper · 2 in the opposite direction

  1. negative
  2. no effect
  3. positive

4 papers more in this group

See all 8 papers →

pruning · yield · Helianthus annuus (common sunflower)Results differ

11 papers: 4 positive, 7 negative or no effect

6 papers in the same direction as this paper · 4 in the opposite direction

  1. negative
    Sunflower yield loss increased as defoliation increased.

    Defoliation Effects on Sunflower Yield Reduction · 2001 · compared with increasing level of defoliation

    Same directionCited by this paper

  2. positive
  3. positive

7 papers more in this group

See all 11 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.