Results 171 to 180 of about 9,924 (218)
Some of the next articles are maybe not open access.
The Zurich method for sapwood estimation
Dendrochronologia, 2020Abstract We present a new predictor for the estimation of the number of missing sapwood rings in oak. It circumvents a number of problems with predictors used in traditional sapwood estimation procedures such as mean ring width or tree age. Instead, we use the mean ring width of the last 9 heartwood rings and the first sapwood ring, which mirrors the
Niels Bleicher +2 more
exaly +2 more sources
Patterns of change of saturated sapwood permeability and sapwood conductance with stand development
Canadian Journal of Forest Research, 1989The saturated sapwood permeability (k) of jack pine (Pinusbanksiana Lamb.) from stands of different ages and site qualities was measured using a constant water flow apparatus. Saturated sapwood permeability at the base of the live crown (BLC) increased with age and reached a plateau just beyond 4 × 10−12 m2. The rate at which this plateau was reached,
David Pothier +2 more
openaire +1 more source
Holzforschung, 1990
In order to characterize the physiological functions of sapwood of needle-leaved tree, ten definite sugar and phenolic constituent contents were periodically determined among outer, middle and inner sapwoods of three Japanese cedars (Sugi, Cryptomeria japonica D. Don, Taxodiaceae) for 150 days after cutting. The fluctuation of these constituents in the
Hideo Ohashi +3 more
openaire +1 more source
In order to characterize the physiological functions of sapwood of needle-leaved tree, ten definite sugar and phenolic constituent contents were periodically determined among outer, middle and inner sapwoods of three Japanese cedars (Sugi, Cryptomeria japonica D. Don, Taxodiaceae) for 150 days after cutting. The fluctuation of these constituents in the
Hideo Ohashi +3 more
openaire +1 more source
Sapwood taper models and implied sapwood volume and foliage profiles for coastal Douglas-fir
Canadian Journal of Forest Research, 1996Sapwood dimensions lend insight into the functional and ecophysiological structure of trees and can therefore be profitably applied in various types of growth analyses and simulation models. Ten taper models were fitted to sapwood data from the stems of 134 Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) trees and were compared by various fit ...
Douglas A. Maguire, João L.F. Batista
openaire +1 more source
Respiration in the sapwood and heartwood of Robinia pseudoacacia
Phytochemistry, 1973Abstract The respiratory activity of distinct sapwood and heartwood annual rings of the stem of Robinia pseudoacacia L. has been investigated. The oxygen uptake and the carbon dioxide release in the inner parts of the sapwood is enhanced in comparison with that in the outer parts. The heartwood rings have no measureable gas exchange.
Wolfgang Holl
exaly +2 more sources
Sapwood allocation in tropical trees: a test of hypotheses
Functional Plant Biology, 2015Carbon allocation to sapwood in tropical canopy trees is a key process determining forest carbon sequestration, and is at the heart of tree growth and dynamic global vegetation models (DGVM). Several allocation hypotheses exist including those applying assumptions on fixed allocation, pipe model, and hierarchical allocation between plant organs. We use
Schippers, P. +3 more
openaire +2 more sources
Oxygen Transport in the Sapwood of Trees
2010Gas composition inside large woody stems differs significantly from that of the ambient atmosphere because of cellular respiration in the xylem, phloem and cambium. Oxygen is required for oxidative respiration, which under most conditions provides the energy for plant cells. The gaseous environment within the woody stems is enriched in CO2 and depleted
MANCUSO, STEFANO, MUGNAI, SERGIO
openaire +2 more sources
Drying of sapwood, heartwood and mixed sapwood and heartwood boards of Pinus radiata
Holz als Roh- und Werkstoff, 2000boards in stacks of all sapwood, all heartwood and mixed sapwood and heartwood, using a tunnel dryer. Drying temperatures were 90/60 °C and airflow was reversed every three hours, with an average air velocity of 5.0 m/s. For stacks of all sapwood and all heartwood boards, the influence of board thickness and position of thicker and thinner boards in ...
openaire +1 more source
Phytoalexins and stress metabolites in the sapwood of trees
Phytochemistry, 1986Abstract A wide range of organic compounds, many of them fungitoxic or fungistatic, appear in the sapwood of trees after wounding, injury or fungal attack. There is evidence that most of these compounds are formed by dying parenchyma cells and they therefore can be considered to be phytoalexins.
R S Burden
exaly +2 more sources
Response of maple sapwood to injury and infection
European Journal of Forest Pathology, 1995SummaryIn sapwood challenge experiments in Acer rubrum, columns of discolouration initiated by wounding and inoculation with pioneer fungi (Cephalosporium sp., Phialophora sp.) were similar in size to untreated wounds. Inoculation with decay fungi (Pleurotus ostreatus, Trametes versicolor) produced larger columns of wound‐initiated discolouration.
W. C. Shortle +3 more
openaire +1 more source