Results 221 to 230 of about 100,255 (266)
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The relationship between tree height and leaf area: sapwood area ratio
Oecologia, 2002The leaf area to sapwood area ratio (A l:A s) of trees has been hypothesized to decrease as trees become older and taller. Theory suggests that A l:A s must decrease to maintain leaf-specific hydraulic sufficiency as path length, gravity, and tortuosity constrain whole-plant hydraulic conductance.
N, McDowell +12 more
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Climate influences the leaf area/sapwood area ratio in Scots pine
Tree Physiology, 1995We tested the hypothesis that the leaf area/sapwood area ratio in Scots pine (Pinus sylvestris L.) is influenced by site differences in water vapor pressure deficit of the air (D). Two stands of the same provenance were selected, one in western Scotland and one in eastern England, so that effects resulting from age, genetic variability, density and ...
M, Mencuccini, J, Grace
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Trees, 2006
Spatial variation in sapwood area to leaf area ratio (Huber value, HV) and specific leaf area (SLA) was examined in branches of closed-canopy trees of silver birch (Betula pendula Roth). HV increased basipetally within a crown and decreased with increasing branch order, but exhibited no significant radial trend along a primary branch.
Arne Sellin, Priit Kupper
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Spatial variation in sapwood area to leaf area ratio (Huber value, HV) and specific leaf area (SLA) was examined in branches of closed-canopy trees of silver birch (Betula pendula Roth). HV increased basipetally within a crown and decreased with increasing branch order, but exhibited no significant radial trend along a primary branch.
Arne Sellin, Priit Kupper
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The influence of thinning and tree size on the sapwood area / leaf area ratio in coigue
Canadian Journal of Forest Research, 2005The effect of thinning and crown class on the projected leaf area, specific leaf area, and projected leaf area / sapwood area ratio was evaluated in a 48-year-old even-aged stand of coigue (Nothofagus dombeyi (Mirb.) Oerst.). The data were collected through destructive sampling of 27 trees and analyzed with analysis of variance and regression models ...
Pablo A Gajardo-Caviedes +3 more
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Comparison of forest Leaf Area Index retrieval based on simple ratio and reduced simple ratio
2010 18th International Conference on Geoinformatics, 2010Leaf Area Index (LAI) is an essential parameter for process-based ecological and climate models. Spectral vegetation indices calculated from remote sensing data are widely used for LAI retrieval at large scales. The applicability of two vegetation indices, namely Simple Ratio (SR) and Reduced Simple Ration (RSR), for retrieving LAI at Maoershan ...
Gaolong Zhu +5 more
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Global variation in the ratio of sapwood to leaf area explained by optimality principles
2023The sapwood area supporting a given leaf area (vH) reflects a coordinated coupling between carbon uptake, water transport and loss at a whole plant level. Worldwide variation in vH reflects diverse plants strategies adapt to prevailing environments, and impact the evolution of global carbon and water cycles.
Huiying Xu +10 more
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A leaf area – sapwood area ratio developed to rate loblolly pine tree vigor
Canadian Journal of Forest Research, 1985Stem cross-sectional sapwood area was linearly related to leaf area in loblolly pine. A better relationship was obtained using cross-sectional sapwood area taken at crown base than at breast height. The relationship was affected by time of sampling, with time of maximum needle biomass giving the best correlation.
C. A. Blanche +2 more
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Acta Horticulturae, 2008
Fruit yield and quality determine grower income from commercial sweet cherry orchards. The objective of this study was to determine the effect of Fruit Number to Leaf Area Ratio (FNLAR, fruit m-2 LA) on Mean Fruit Weight (MFW), firmness (F), soluble solids content (SSC), titratable acidity (TA) and SSC:TA ratio of `Bing?
Cittadini, E.D. +5 more
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Fruit yield and quality determine grower income from commercial sweet cherry orchards. The objective of this study was to determine the effect of Fruit Number to Leaf Area Ratio (FNLAR, fruit m-2 LA) on Mean Fruit Weight (MFW), firmness (F), soluble solids content (SSC), titratable acidity (TA) and SSC:TA ratio of `Bing?
Cittadini, E.D. +5 more
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Global variation in the ratio of sapwood to leaf area explained by optimality principles
New PhytologistSummary The sapwood area supporting a given leaf area (Huber value, v H ) reflects the coupling between carbon uptake and water transport and loss at a whole ...
Huiying Xu +11 more
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Predicting plant leaf area production: shoot assimilate accumulation and partitioning, and leaf area ratio, are stable for a wide range of sorghum population densities [PDF]
, 2002 Predicting plant leaf area production is required for modelling carbon balance and tiller dynamics in plant canopies. Plant leaf area production can be studied using a framework based on radiation intercepted, radiation use efficiency (RUE) and leaf area ratio (LAR) (ratio of leaf area to net above-ground biomass).
Lafarge, T. A., Hammer, Graeme L.
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