Rootstock Influences the Construction Costs of ‘Starkspur Supreme Delicious’ Apple Trees
DOI:
https://doi.org/10.71318/apom.2000.54.1.18Abstract
The construction costs (CC comp) of vegetative and reproductive components, and total tree (total CC) and net (CC net) construction costs were calculated using the gross heat of combustion, percentage ash content, and total nitrogen for ‘Starkspur Supreme Delicious’ apple trees ( Malus domesticaBorkh) grafted onto MAC.24, M.7 EMLA, M.26 EMLA, M.9 EMLA, MAC.9, and M.27 EMLA. The CC compin Oct./Nov. of 1-yr wood, 2-yr wood, and roots was lower in trees grafted onto more dwarfing rootstocks than in those on more vigorous rootstocks. Leaves had the highest CC comp. Frame, 2-yr, 1-yr, shoot, and root had similar CC comp. Fruit and spurs had the lowest CC comp. As tree size decreased, total CC and CC netdecreased.
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