Abstract
Summer pruning systems were compared for ‘Prime-Jan’ ® primocane-fruiting blackberry ( Rubus subgenus Rubus ) grown in a fully closed, plastic covered tunnel in Aurora, OR. Individual canes were soft-tipped (by removing 0.10 m) or hard-tipped (removing 0.45 m) to a 1-m height on each of four dates in 2008 and 2009. On average, canes that were hard-tipped produced more branches and had more fruit/cane than soft-tipped canes. Canes that were tipped early (22–27 June) produced more fruit/cane than those tipped later (7–24 July). When canes were hard-tipped early in the season, the number of fruit/cane was increased threefold compared with soft-tipping canes early. In contrast, when plots were hedged to 1-m tall lightly (“soft” hedge removing 0.10 m) on 22–27 June or more severely (“hard” hedge, removing 0.45 m) on 29 June–2 July, using shears, there was no significant effect on yield/plot. The hard-hedge treatments may have performed better if they had been done earlier or at the same time as the soft-hedge treatments; this would only have been possible if canes had been cut back (hedged) to a shorter height than 1 m. Hard hedging, done ≈1 week later than soft hedging, delayed the fruiting season by 10–14 days. Fruit harvest continued until early to mid-November. Daily average air temperature in the closed tunnel was 2–7 °F warmer than the outside and fruit were protected from autumn rainfall. Hard-tipping individual canes, by hand, or hedging primocanes mechanically early in the season shows promise in this crop for maximizing economic returns.
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Claims 10
Claim · model-written summary
Hard tipping produced more branches than soft tipping.
Verbatim
e0“canes that were hard-tipped produced more branches and had more fruit/cane than soft-tipped canes”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Hard tipping produced more fruit per cane than soft tipping.
Verbatim
e0“canes that were hard-tipped produced more branches and had more fruit/cane than soft-tipped canes”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Early tipping produced more fruit per cane than later tipping.
Verbatim
e0“Canes that were tipped early (22–27 June) produced more fruit/cane than those tipped later (7–24 July).”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Early hard tipping tripled fruit per cane compared with early soft tipping.
Verbatim
e0“When canes were hard-tipped early in the season, the number of fruit/cane was increased threefold compared with soft-tipping canes early.”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Hedge severity did not significantly affect yield per plot.
Verbatim
e0“when plots were hedged to 1-m tall lightly (“soft” hedge removing 0.10 m) on 22–27 June or more severely (“hard” hedge, removing 0.45 m) on 29 June–2 July, using shears, there was no significant effect on yield/plot”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Hard hedging delayed fruiting by 10–14 days relative to soft hedging.
Verbatim
e0“Hard hedging, done ≈1 week later than soft hedging, delayed the fruiting season by 10–14 days.”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Fruit harvest continued until early to mid-November.
Verbatim
e0“Fruit harvest continued until early to mid-November.”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Air in the closed tunnel averaged 2–7 °F warmer than outdoors.
Verbatim
e0“Daily average air temperature in the closed tunnel was 2–7 °F warmer than the outside”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
The tunnel protected fruit from autumn rain.
Verbatim
e0“fruit were protected from autumn rainfall”
t0“Primocane-fruiting Blackberry”
Claim · model-written summary
Early hard tipping or mechanical hedging was recommended as promising for economic returns.
Verbatim
e0“Hard-tipping individual canes, by hand, or hedging primocanes mechanically early in the season shows promise in this crop for maximizing economic returns.”
t0“Primocane-fruiting Blackberry”