Abstract
Summary‘Gulf Coast’, ‘Sharpblue’, and ‘Wannabe’ southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida to test the feasibility of a non-dormant blueberry production system. A non-dormant production system involves application of nitrogen (N) throughout the fall and winter, which enables the plants to avoid the normal dormancy cycle and the concomitant chilling requirement. If successful, this system could extend the production range of blueberry into subtropical and tropical areas where chilling temperatures are inadequate for traditional (dormant) production systems. Nitrogen fertilizer rate (84 to 252 kg ha–1 N in year 1, 168 to 336 kg ha–1 N in year 2) was evaluated for effects on maintaining plant growth and development in this system. Additionally, since organic soil amendments are known to improve blueberry growth, the effects of municipal solid waste (MSW) compost and acidic peat on maintaining growth were also evaluated. In general, increasing N rates from 84 to 252 kg ha–1 (year 1) or 168 to 252 kg ha–1 (year 2) increased plant canopy volume, leaf retention, and rate of new vegetative budbreak. There was no consistent effect of N rates on soil nutrient concentrations, but leaf N increased and leaf Ca decreased as N rate increased. MSW compost incorporation increased P, Ca, Mg, Cu, Fe, Mn, and Zn soil concentrations compared with peat, but had no consistent effect on leaf nutrient concentrations. Plant height and canopy volume were consistently greater for plants grown in the MSW compost compared with the peat amendment, but there were no differences in leaf retention or vegetative budbreak between the two soil amendments. Plants in this non-dormant system have shown no deleterious growth effects, suggesting that establishing a blueberry planting in a warm winter climate is feasible under the described conditions.
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Claims 12
Claim · model-written summary
Increasing N rates increased plant canopy volume, leaf retention and the rate of new vegetative budbreak of blueberry in southwest Florida.
- Taxon
- blueberrye0
- Treatment
- increasing N ratese1
- Outcome
- plant canopy volume, leaf retention, and rate of new vegetative budbreake1
- Direction
- increasede1
- Setting
- southwest Floridae0
Not reportedComparator
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“increasing N rates from 84 to 252 kg ha–1 (year 1) or 168 to 252 kg ha–1 (year 2) increased plant canopy volume, leaf retention, and rate of new vegetative budbreak”
Claim · model-written summary
Leaf N of blueberry increased as N rate increased.
Not reportedComparator
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“There was no consistent effect of N rates on soil nutrient concentrations, but leaf N increased and leaf Ca decreased as N rate increased”
Claim · model-written summary
Leaf Ca of blueberry decreased as N rate increased.
Not reportedComparator
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“There was no consistent effect of N rates on soil nutrient concentrations, but leaf N increased and leaf Ca decreased as N rate increased”
Claim · model-written summary
N rates had no consistent effect on soil nutrient concentrations.
Not reportedComparatorDirection
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“There was no consistent effect of N rates on soil nutrient concentrations, but leaf N increased and leaf Ca decreased as N rate increased”
Claim · model-written summary
MSW compost increased soil P, Ca and Mg concentrations compared with peat.
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“MSW compost incorporation increased P, Ca, Mg, Cu, Fe, Mn, and Zn soil concentrations compared with peat, but had no consistent effect on leaf nutrient concentrations”
Claim · model-written summary
MSW compost increased soil Cu, Fe and Mn concentrations compared with peat.
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“MSW compost incorporation increased P, Ca, Mg, Cu, Fe, Mn, and Zn soil concentrations compared with peat, but had no consistent effect on leaf nutrient concentrations”
Claim · model-written summary
MSW compost increased soil Zn concentration compared with peat.
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“MSW compost incorporation increased P, Ca, Mg, Cu, Fe, Mn, and Zn soil concentrations compared with peat, but had no consistent effect on leaf nutrient concentrations”
Claim · model-written summary
MSW compost had no consistent effect on leaf nutrient concentrations compared with peat.
- Taxon
- blueberrye0
- Treatment
- MSW compost incorporatione1
- Outcome
- leaf nutrient concentrationse1
- Comparator
- peate1
Not reportedDirection
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“MSW compost incorporation increased P, Ca, Mg, Cu, Fe, Mn, and Zn soil concentrations compared with peat, but had no consistent effect on leaf nutrient concentrations”
Claim · model-written summary
Plant height and canopy volume were greater with MSW compost than with peat amendment.
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“Plant height and canopy volume were consistently greater for plants grown in the MSW compost compared with the peat amendment, but there were no differences in leaf retention or vegetative budbreak between the two soil amendments”
Claim · model-written summary
Leaf retention and vegetative budbreak did not differ between MSW compost and peat amendment.
- Taxon
- blueberrye0
- Treatment
- MSW composte1
- Outcome
- leaf retention or vegetative budbreake1
- Comparator
- peat amendmente1
Not reportedDirection
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“Plant height and canopy volume were consistently greater for plants grown in the MSW compost compared with the peat amendment, but there were no differences in leaf retention or vegetative budbreak between the two soil amendments”
Claim · model-written summary
Plants in the non-dormant system showed no deleterious growth effects.
Verbatim
e0“southern highbush blueberry (Vaccinium corymbosum interspecific hybrid) cultivars were planted at a density of 10,000 plants per ha in southwest Florida”
e1“Plants in this non-dormant system have shown no deleterious growth effects, suggesting that establishing a blueberry planting in a warm winter climate is feasible under the described conditions”
Claim · model-written summary
Establishing a blueberry planting in a warm winter climate is feasible under the described conditions.
Verbatim
e0“Plants in this non-dormant system have shown no deleterious growth effects, suggesting that establishing a blueberry planting in a warm winter climate is feasible under the described conditions”
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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.