Effect of trellising system and cane density on the production of red raspberries (Rubus idaeus L.)

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Vanden Heuvel, Justine E.

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University of Guelph

Abstract

Three trellising systems (hedgerow, V-trellis, shift-trellis) over four cane densities (9, 16, 23, and 30 canesm\sp2) of Rubus ideaus L. cv. 'Titan' raspberries were compared for productivity and yield potential. The V-trellis had a larger fruiting framework and higher yield (+19%) than the hedgerow, while the shift-trellis had a smaller fruiting framework, lower yield ($-$42%), and lower quality fruit. An optimum cane density was not found for any system. Yield potential per cane decreased as cane density increased, however total yield increased due to the increase in cane number. Fruit quality decreased as cane density increased. V-trellising primocane-fruiting raspberries had no effect on vegetative and reproductive components. Staking wind-stressed floricanes greatly increased yield per cane (68% to 189%) by increasing fruit number and leaf area per cane. Mechanically stressed 'Boyne' primocanes produced up to 140% more ethylene than staked canes.

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Keywords

trellising systems, hedgerow, V-trellis, shift-trellis, cane densities, Rubus ideaus L. cv. Titan, raspberries, productivity, yield potential

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