Abstract
An open-market window has been identified in Virginia for fall broccoli ( Brassica oleracea var. italica ). Vegetable producers using plasticulture systems can capitalize on this opportunity by growing broccoli as a second crop after summer vegetables. The objective of this project was to evaluate suitability of two broccoli cultivars, Everest and Gypsy, for the fall production of large single-heads (>6 inches in diameter) for the fresh market. Planting density and rate of nitrogen (N) fertilizer (25, 60, and 100 lb/acre N) effects on yield characteristics were evaluated in a plasticulture system during a 3-year study (2003–05) conducted with broccoli transplants at the Virginia Polytechnic Institute and State University Kentland Agricultural Research Farm near Blacksburg, VA. The percentage of large heads was cultivar, plant density, and N rate dependent. The midseason ‘Gypsy’ produced significantly higher total yield and head weight compared with the early-season ‘Everest’. The optimum density to maximize floret production per area was 12,500 plants/acre and a supplemental N rate of 100 lb/acre. This N rate significantly ( P < 0.002) improved marketable yield, large head yield, and leaf N accumulation compared with the lower rates. The data indicate that the feasibility of growing fall broccoli using a plasticulture system depends on the number of large heads produced for the fresh market. This in turn will depend on the choice of cultivar, stand establishment, and the requirement for supplemental N fertilizer over the residual level available in the soil after the first crop.
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Claims 8
Claim · model-written summary
Percentage of large heads depended on cultivar, plant density and N rate.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Material
- cultivare0
- Treatment
- plant density, and N ratee0
- Outcome
- percentage of large headse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of large heads was cultivar, plant density, and N rate dependent”
t0“broccoli”
Claim · model-written summary
Gypsy had significantly higher total yield than Everest.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Material
- Gypsye0
- Outcome
- total yielde0
- Direction
- highere0
- Comparator
- Evereste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The midseason ‘Gypsy’ produced significantly higher total yield and head weight compared with the early-season ‘Everest’”
t0“broccoli”
Claim · model-written summary
Gypsy had significantly higher head weight than Everest.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Material
- Gypsye0
- Outcome
- head weighte0
- Direction
- highere0
- Comparator
- Evereste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The midseason ‘Gypsy’ produced significantly higher total yield and head weight compared with the early-season ‘Everest’”
t0“broccoli”
Claim · model-written summary
The optimum density for floret production per area was 12,500 plants/acre.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Outcome
- floret production per areae0
- Direction
- maximizee0
- Value
- 12,500 plants/acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum density to maximize floret production per area was 12,500 plants/acre”
t0“broccoli”
Claim · model-written summary
The optimum supplemental nitrogen rate for floret production was 100 lb/acre.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- supplemental N ratee0
- Outcome
- floret production per areae0
- Direction
- maximizee0
- Value
- 100 lb/acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum density to maximize floret production per area was 12,500 plants/acre and a supplemental N rate of 100 lb/acre”
t0“broccoli”
Claim · model-written summary
A 100 lb/acre supplemental N rate improved marketable yield over lower rates.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- This N ratee0
- Outcome
- marketable yielde0
- Direction
- improvede0
- Comparator
- lower ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This N rate significantly ( P < 0.002) improved marketable yield, large head yield, and leaf N accumulation compared with the lower rates”
t0“broccoli”
Claim · model-written summary
A 100 lb/acre supplemental N rate improved large head yield over lower rates.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- This N ratee0
- Outcome
- large head yielde0
- Direction
- improvede0
- Comparator
- lower ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This N rate significantly ( P < 0.002) improved marketable yield, large head yield, and leaf N accumulation compared with the lower rates”
t0“broccoli”
Claim · model-written summary
A 100 lb/acre supplemental N rate improved leaf N accumulation over lower rates.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- This N ratee0
- Outcome
- leaf N accumulatione0
- Direction
- improvede0
- Comparator
- lower ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This N rate significantly ( P < 0.002) improved marketable yield, large head yield, and leaf N accumulation compared with the lower rates”
t0“broccoli”
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See all 46 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.