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Physiological response to pruning severity in Eucalyptus regnans plantations
journal contribution
posted on 2023-05-19, 06:46 authored by Lisboa, M, Acuna, E, Cancino, J, Chao, F, Munoz, F, Rodriguez, R, Peter VolkerPeter VolkerThe photosynthetic response to pruning was measured in two Eucalyptus regnans stands, aged 2 and 3 years, located in areas of high productivity on the coast of the province of Arauco, Chile. Variables such as rates of CO2 assimilation and stomatal conductance were measured in three ages of foliage on trees with different pruning severity treatments, which corresponded to the removal of 0 % (control), 30, 50 and 70 % of live crown length. The 2-year-old stand measurements were performed at the time of pruning and 6, 10, 14 and 18 weeks later, and the 3-year stand, 5, 9, 18 and 28 weeks after pruning. In both trials, significant differences were found between the foliage ages for all instances of measurement showing the mature foliage the highest values up to 30 % higher than old foliage. There were also significant differences between pruning severity treatments in both trials in which, in general, the highest values of CO2 assimilation were observed among the highest pruning severity treatments with values up to 40 % higher than the unpruned trees.
History
Publication title
New ForestsVolume
45Issue
6Pagination
753-764ISSN
0169-4286Department/School
School of Natural SciencesPublisher
Kluwer Academic PublPlace of publication
Van Godewijckstraat 30, Dordrecht, Netherlands, 3311 GzRights statement
Copyright 2014 Springer Science+Business Media DordrechtRepository Status
- Restricted