Abstract
Strawberries ( Fragaria × ananassa Duch.) were grown in two seasons at Dover, Fla., with polyethylene mulch and drip irrigation. Nitrogen was injected weekly at 0.28 (50), 0.56 (100), 0.84 (150), 1.12 (200), and 1.40 (250) kg N/ha per day (kg·ha -1 for season) for `Oso Grande' and `Sweet Charlie' in 1991-92 season and for `Oso Grande' and `Seascape' in 1992-1993 season. Nitrogen fertilization in 1991-1992, over the range of 0.28 to 1.40 kg N/ha per day, had no significant effect on early (November to January) strawberry yields. March (the largest production month) yield and total-season yield increased with increasing N fertilization to 0.76 and 0.54 kg N/ha per day, respectively. Nitrogen fertilization did not affect yields of strawberry in 1992-93. Fruit firmness and average fruit weight were not affected by N fertilization from 0.28 to 1.40 kg N/ha per day. Nitrogen fertilization increased whole leaf N, leaf blade N, and petiole sap nitrate-N concentrations linearly for most sampling dates in both years. Early yields were greater for `Sweet Charlie' than `Oso Grande'. Yields were greater for `Oso Grande' during March, and total-season yields were similar for both cultivars in 1991-92. `Oso Grande' had greater early, March, and total yields than `Seascape' in 1992-93.
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Claims 10
Claim · model-written summary
Nitrogen rate had no significant effect on early yield in 1991-1992.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassae0 - Treatment
- Nitrogen fertilizatione0
- Outcome
- early (November to January) strawberry yieldse0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Nitrogen fertilization in 1991-1992, over the range of 0.28 to 1.40 kg N/ha per day, had no significant effect on early (November to January) strawberry yields”
Claim · model-written summary
March yield increased up to 0.76 kg N/ha per day.
- Treatment
- N fertilizatione0
- Outcome
- March (the largest production month) yielde0
- Direction
- increasede0
- Value
- 0.76e0
Not reportedTaxonComparator
Verbatim
e0“March (the largest production month) yield and total-season yield increased with increasing N fertilization to 0.76 and 0.54 kg N/ha per day, respectively”
Claim · model-written summary
Total season yield increased up to 0.54 kg N/ha per day.
- Treatment
- N fertilizatione0
- Outcome
- total-season yielde0
- Direction
- increasede0
- Value
- 0.54 kg N/ha per daye0
Not reportedTaxonComparator
Verbatim
e0“March (the largest production month) yield and total-season yield increased with increasing N fertilization to 0.76 and 0.54 kg N/ha per day, respectively”
Claim · model-written summary
Nitrogen had no reported yield effect in 1992-93.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- yieldse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilization did not affect yields of strawberry in 1992-93”
Claim · model-written summary
Fruit firmness and mean fruit weight were unaffected by N rate.
Not reportedTaxonComparator
Verbatim
e0“Fruit firmness and average fruit weight were not affected by N fertilization from 0.28 to 1.40 kg N/ha per day”
Claim · model-written summary
Leaf and petiole nitrogen indicators increased linearly with N fertilization.
- Treatment
- Nitrogen fertilizatione0
- Outcome
- whole leaf N, leaf blade N, and petiole sap nitrate-N concentrationse0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“Nitrogen fertilization increased whole leaf N, leaf blade N, and petiole sap nitrate-N concentrations linearly for most sampling dates in both years”
Claim · model-written summary
Sweet Charlie had higher early yield than Oso Grande.
Not reportedTaxon
Verbatim
e0“Early yields were greater for `Sweet Charlie' than `Oso Grande'”
Claim · model-written summary
Oso Grande had higher March yield.
Not reportedTaxon
Verbatim
e0“Yields were greater for `Oso Grande' during March”
Claim · model-written summary
The two cultivars had similar total season yield in 1991-92.
Not reportedTaxon
Verbatim
e0“total-season yields were similar for both cultivars in 1991-92”
Claim · model-written summary
Oso Grande exceeded Seascape in early, March and total yield in 1992-93.
- Material
- `Oso Grande'e0
- Outcome
- early, March, and total yieldse0
- Direction
- greatere0
- Comparator
- `Seascape'e0
Not reportedTaxon
Verbatim
e0“`Oso Grande' had greater early, March, and total yields than `Seascape' in 1992-93”
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