Abstract
Two greenhouse cucumber ( Cucumis sativus ) cultivars with differing fruit types [European (`Bologna') and Beit-alpha (`Sarig')] were grown during two seasons in a perlite medium in black plastic nursery containers in a passively ventilated greenhouse in northern Florida to evaluate fruiting responses to nitrogen (N) fertilization over the range of 75 to 375 mg·L –1 . Fruit production, consisting mostly of fancy fruits, increased quadratically with N concentration in the nutrient solution, leveling off above 225 mg·L –1 for both cucumber cultivars. Fruit length and diameter were not affected by N concentration in the nutrient solution. Leaf N concentration, averaged over three sampling dates, increased linearly with N concentration in the nutrient solution from 46 g·kg –1 with 75 mg·L –1 N to 50 g·kg –1 with 375 mg·L –1 N. Fruit firmness decreased with increasing N concentration and there was little difference in firmness between the two cultivars. Firmness was similar across three measurement dates during the spring harvest season, but increased during the season in the fall. Fruit color responses to N concentration were dependent on the specific combination of experiment, sampling date, and cultivar. For most combinations of experiment, sampling date, and cultivar, cucumber epidermal color was greener (higher hue angle) with increased N concentration. The color was darkest (lowest L * value) and most intense (highest chroma value) with intermediate to higher N concentrations.
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Claims 11
Claim · model-written summary
Fruit production increased quadratically with nitrogen and leveled off above 225 mg·L –1 in both cultivars.
- Taxon
- cucumber
Cucumis sativust0 - Treatment
- N concentration in the nutrient solutione0
- Outcome
- Fruit productione0
- Direction
- increasede0
- Value
- 225 mg·L –1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit production, consisting mostly of fancy fruits, increased quadratically with N concentration in the nutrient solution, leveling off above 225 mg·L –1 for both cucumber cultivars”
t0“cucumber”
Claim · model-written summary
Fruit length and diameter were unaffected by nitrogen concentration.
- Taxon
- cucumberCucumis sativust0
- Treatment
- N concentration in the nutrient solutione0
- Outcome
- Fruit length and diametere0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit length and diameter were not affected by N concentration in the nutrient solution”
t0“cucumber”
Claim · model-written summary
Leaf nitrogen concentration increased linearly as solution nitrogen rose.
- Taxon
- cucumberCucumis sativust0
- Treatment
- N concentration in the nutrient solutione0
- Outcome
- Leaf N concentratione0
- Direction
- increasede0
- Value
- 46 g·kg –1e0
- Qualifier
- 50 g·kg –1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf N concentration, averaged over three sampling dates, increased linearly with N concentration in the nutrient solution from 46 g·kg –1 with 75 mg·L –1 N to 50 g·kg –1 with 375 mg·L –1 N”
t0“cucumber”
Claim · model-written summary
Fruit firmness decreased with increasing nitrogen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- N concentratione0
- Outcome
- Fruit firmnesse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit firmness decreased with increasing N concentration and there was little difference in firmness between the two cultivars”
t0“cucumber”
Claim · model-written summary
Firmness differed little between the two cultivars.
- Taxon
- cucumberCucumis sativust0
- Outcome
- firmnesse0
- Direction
- little differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was little difference in firmness between the two cultivars”
t0“cucumber”
Claim · model-written summary
Fruit firmness was stable across spring measurement dates.
- Taxon
- cucumberCucumis sativust0
- Outcome
- Firmnesse0
- Direction
- similare0
- Qualifier
- spring harvest seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Firmness was similar across three measurement dates during the spring harvest season”
t0“cucumber”
Claim · model-written summary
Fruit firmness increased during the fall season.
- Taxon
- cucumberCucumis sativust0
- Outcome
- increasede0
- Direction
- increasede0
- Qualifier
- season in the falle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased during the season in the fall”
t0“cucumber”
Claim · model-written summary
Fruit color responses to nitrogen depended on experiment, sampling date, and cultivar.
- Taxon
- cucumberCucumis sativust0
- Treatment
- N concentratione0
- Outcome
- Fruit color responsese0
- Qualifier
- specific combination of experiment, sampling date, and cultivare0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit color responses to N concentration were dependent on the specific combination of experiment, sampling date, and cultivar”
t0“cucumber”
Claim · model-written summary
Epidermal color was generally greener with increased nitrogen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- increased N concentratione0
- Outcome
- cucumber epidermal colore0
- Direction
- greenere0
- Qualifier
- For most combinations of experiment, sampling date, and cultivare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For most combinations of experiment, sampling date, and cultivar, cucumber epidermal color was greener (higher hue angle) with increased N concentration”
t0“cucumber”
Claim · model-written summary
Fruit color was darkest at intermediate to higher nitrogen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- intermediate to higher N concentrationse0
- Outcome
- colore0
- Direction
- darkeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The color was darkest (lowest L * value) and most intense (highest chroma value) with intermediate to higher N concentrations”
t0“cucumber”
Claim · model-written summary
Fruit color intensity was highest at intermediate to higher nitrogen.
- Taxon
- cucumberCucumis sativust0
- Treatment
- intermediate to higher N concentrationse0
- Outcome
- chroma valuee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The color was darkest (lowest L * value) and most intense (highest chroma value) with intermediate to higher N concentrations”
t0“cucumber”
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- positive
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262 papers in the same direction as this paper · 19 in the opposite direction · 6 reporting no difference from an alternative
- no effect
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See all 288 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.