Paper · 1981 · Journal of the American Society for Horticultural Science

Vegetative and Reproductive Growth Responses of Three Strawberry Cultivars to Nitrogen1

Patrick J. Breen; Lloyd W. Martin

15
claims
30
verbatim quotes
22
citations
3
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Abundant (‘Hood’ and ‘Benton’) and poor (‘Olympus’) runnering cultivars of strawberry ( Fragaria × ananassa Duch.) were grown in a milled-bark medium over an 8- or 16-fold range of slow-release ureaform N. Growth was poor or normal at low and intermediated rates of N, but inhibited at high rates. Number of leaves, crowns, and runners and subsequent inflorescence and flower production were frequently less than maximum at the highest level of N (4.8 gN/liter bark medium). Applied N had a significant effect on the number of crowns/plant, inflorescences/crown and flowers/inflorescence. In all cultivars, percent N in leaves in August, or in the entire shoot in November, showed a significant linear relationship with applied N. ‘Hood’ accumulated a higher concentration of N in both parts than ‘Olympus’ or ‘Benton’. Flower production in all cultivars was significantly correlated with the percent N in the shoot in November. Although the optimum range of applied N was similar for all cultivars, ‘Olympus’ was the most responsive to N in terms of increased leaf and flower production. When maximum values are compared, ‘Olympus’ in one year produced over 40% more leaves and 75% more flowers but at least 74% fewer runners than ‘Hood’ or ‘Benton’. ‘Benton’ was the only cultivar that at low and intermediate rates of applied N averaged less than one inflorescence/crown. Crown production by the 3 cultivars was not significantly different and high levels of applied N failed to increase the number of crowns available for flower initiation above those obtained at intermediate rates.

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

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Claims 15

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Strawberry growth was poor or normal at low and intermediate N rates but inhibited at high N rates.

Taxon
StrawberryFragaria ×ananassat0
Treatment
high ratese1
Outcome
Growthe1
Direction
inhibitede1
Comparator
low and intermediated rates of Ne1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Growth was poor or normal at low and intermediated rates of N, but inhibited at high rates”

✓ located verbatim in the source · abstract, characters 215–305 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Number of leaves, crowns and runners was frequently less than maximum at the highest N level.

Taxon
StrawberryFragaria ×ananassat0
Treatment
highest level of N (4.8 gN/liter bark medium)e1
Outcome
Number of leaves, crowns, and runnerse1
Direction
less than maximume1
Qualifier
frequentlye1
Comparator
maximume1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Number of leaves, crowns, and runners and subsequent inflorescence and flower production were frequently less than maximum at the highest level of N (4.8 gN/liter bark medium)”

✓ located verbatim in the source · abstract, characters 307–482 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Inflorescence and flower production was frequently less than maximum at the highest N level.

Taxon
StrawberryFragaria ×ananassat0
Treatment
highest level of N (4.8 gN/liter bark medium)e1
Outcome
inflorescence and flower productione1
Direction
less than maximume1
Qualifier
frequentlye1
Comparator
maximume1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Number of leaves, crowns, and runners and subsequent inflorescence and flower production were frequently less than maximum at the highest level of N (4.8 gN/liter bark medium)”

✓ located verbatim in the source · abstract, characters 307–482 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Applied N had a significant effect on crowns per plant, inflorescences per crown and flowers per inflorescence.

Taxon
StrawberryFragaria ×ananassat0
Treatment
Applied Ne1
Outcome
number of crowns/plant, inflorescences/crown and flowers/inflorescencee1

Not reportedComparatorDirection

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Applied N had a significant effect on the number of crowns/plant, inflorescences/crown and flowers/inflorescence”

✓ located verbatim in the source · abstract, characters 484–596 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Percent N in leaves in August and in the whole shoot in November showed a significant linear relationship with applied N.

Taxon
StrawberryFragaria ×ananassat0
Treatment
applied Ne1
Outcome
percent N in leavese1

Not reportedDirection

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“In all cultivars, percent N in leaves in August, or in the entire shoot in November, showed a significant linear relationship with applied N”

✓ located verbatim in the source · abstract, characters 598–738 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Flower production in all cultivars was significantly correlated with the percent N in the shoot in November.

Taxon
StrawberryFragaria ×ananassat0
Organ / stage
shoote1
Outcome
Flower productione1

Not reportedDirection

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Flower production in all cultivars was significantly correlated with the percent N in the shoot in November”

✓ located verbatim in the source · abstract, characters 829–936 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

The Hood cultivar accumulated a higher concentration of N in both parts than Olympus.

Taxon
StrawberryFragaria ×ananassat0
Material
Hoode1
Outcome
concentration of N in both partse1
Direction
highere1
Comparator
Olympuse1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“‘Hood’ accumulated a higher concentration of N in both parts than ‘Olympus’ or ‘Benton’”

✓ located verbatim in the source · abstract, characters 740–827 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Olympus was the most responsive cultivar to applied N in leaf and flower production.

Taxon
StrawberryFragaria ×ananassat0
Material
Olympuse1
Treatment
applied Ne1
Outcome
leaf and flower productione1
Direction
increasede1

Not reportedComparator

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Although the optimum range of applied N was similar for all cultivars, ‘Olympus’ was the most responsive to N in terms of increased leaf and flower production”

✓ located verbatim in the source · abstract, characters 938–1096 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

At maximum values, Olympus in one year produced over 40% more leaves than Hood.

Taxon
StrawberryFragaria ×ananassat0
Material
Olympuse1
Outcome
leavese1
Direction
moree1
Value
40%e1
Qualifier
in one yeare1
Comparator
Hoode1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“When maximum values are compared, ‘Olympus’ in one year produced over 40% more leaves and 75% more flowers but at least 74% fewer runners than ‘Hood’ or ‘Benton’”

✓ located verbatim in the source · abstract, characters 1098–1259 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

At maximum values, Olympus in one year produced over 75% more flowers than Hood.

Taxon
StrawberryFragaria ×ananassat0
Material
Olympuse1
Outcome
flowerse1
Direction
moree1
Value
75%e1
Qualifier
in one yeare1
Comparator
Hoode1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“When maximum values are compared, ‘Olympus’ in one year produced over 40% more leaves and 75% more flowers but at least 74% fewer runners than ‘Hood’ or ‘Benton’”

✓ located verbatim in the source · abstract, characters 1098–1259 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

At maximum values, Olympus in one year produced at least 74% fewer runners than Hood.

Taxon
StrawberryFragaria ×ananassat0
Material
Olympuse1
Outcome
runnerse1
Direction
fewere1
Value
74%e1
Qualifier
at leaste1
Comparator
Hoode1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“When maximum values are compared, ‘Olympus’ in one year produced over 40% more leaves and 75% more flowers but at least 74% fewer runners than ‘Hood’ or ‘Benton’”

✓ located verbatim in the source · abstract, characters 1098–1259 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Benton was the only cultivar that averaged less than one inflorescence per crown at low and intermediate N rates.

Taxon
StrawberryFragaria ×ananassat0
Material
Bentone1
Outcome
inflorescence/crowne1
Value
less than onee1
Qualifier
at low and intermediate rates of applied Ne1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“‘Benton’ was the only cultivar that at low and intermediate rates of applied N averaged less than one inflorescence/crown”

✓ located verbatim in the source · abstract, characters 1261–1382 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Observationobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Crown production did not differ significantly among the three cultivars.

Taxon
StrawberryFragaria ×ananassat0
Outcome
Crown productione1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Crown production by the 3 cultivars was not significantly different”

✓ located verbatim in the source · abstract, characters 1384–1451 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

High levels of applied N failed to increase the number of crowns available for flower initiation above those at intermediate rates.

Taxon
StrawberryFragaria ×ananassat0
Treatment
high levels of applied Ne1
Outcome
number of crowns available for flower initiatione1
Direction
failed to increasee1
Comparator
intermediate ratese1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“high levels of applied N failed to increase the number of crowns available for flower initiation above those obtained at intermediate rates”

✓ located verbatim in the source · abstract, characters 1456–1595 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑
Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The optimum range of applied N was similar for all cultivars.

Taxon
StrawberryFragaria ×ananassat0
Outcome
optimum range of applied Ne1
Direction
similare1

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

Fragaria x ananassa
Fragaria ×ananassa · TaxonIvar Leidus · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Although the optimum range of applied N was similar for all cultivars, ‘Olympus’ was the most responsive to N in terms of increased leaf and flower production”

✓ located verbatim in the source · abstract, characters 938–1096 · show in text ↑
t0

“Three Strawberry Cultivars”

✓ located verbatim in the source · title, characters 48–74 · show in text ↑

nitrogen · yield · Fragaria x ananassa (strawberry)Results differ

60 papers: 48 positive, 12 negative or no effect

47 papers in the same direction as this paper · 12 in the opposite direction

  1. negative
  2. positive
  3. positive

56 papers more in this group

See all 60 papers →

nitrogen · phenology · Fragaria x ananassa (strawberry)Positive and negative results

8 papers: 6 positive, 2 negative or no effect

1 paper in the same direction as this paper · 6 in the opposite direction

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

in vitro · yield · Fragaria x ananassa (strawberry)Positive and negative results

26 papers: 17 positive, 9 negative or no effect

8 papers in the same direction as this paper · 17 in the opposite direction

  1. positive
  2. positive
  3. positive

22 papers more in this group

See all 26 papers →

in vitro · growth · Fragaria x ananassa (strawberry)Positive and negative results

86 papers: 76 positive, 10 negative or no effect

9 papers in the same direction as this paper · 76 in the opposite direction

  1. positive
  2. positive
  3. positive

82 papers more in this group

See all 86 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.