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Six-year time course of light-use efficiency, carbon gain and growth of beech saplings (Fagus sylvatica) planted under a Scots pine (Pinus sylvestris) shelterwood

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Issue date
2007-08-01
Author
Balandier, Philippe
Sinoquet, H.
Frak, Ela
Giuliani, Rita
Vandame, Marc
Descamps, Sylvestre
Coll Mir, Lluís
Adam, Boris
Prevosto, Bernard
Curt, Thomas
Suggested citation
Balandier, Philippe; Sinoquet, H.; Frak, Ela; Giuliani, Rita; Vandame, Marc; Descamps, Sylvestre; ... Curt, Thomas. (2007) . Six-year time course of light-use efficiency, carbon gain and growth of beech saplings (Fagus sylvatica) planted under a Scots pine (Pinus sylvestris) shelterwood. Tree Physiology, 2007, vol. 27, num. 8, p. 1073-1082. https://doi.org/10.1093/treephys/27.8.1073.
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Abstract
Two-year-old Fagus sylvatica L. saplings were planted under the cover of a Pinus sylvestris L. stand in the French Massif Central. The stand was differentially thinned to obtain a gradient of transmitted photosynthetically active radiation (PARt; 0–0.35). Eighteen Fagus saplings were sampled in this gradient, and their growth (basal stem diameter increment) was recorded over six years. Over the same period, morphological parameters (leaf area, number and arrangement in space) were monitored by 3D-digitization. Photosynthetic parameters were estimated with a portable gas-exchange analyzer. Photosynthesis was mainly related to light availability, whereas sapling morphology was mainly driven by sapling size. Annual stem diameter increment was related to the amount of light-intercepting foliage (silhouette to total leaf area ratio (STAR) × total sapling leaf area (LA)) and light availability above the saplings (PARt). However, light-use efficiency, i.e., the slope of the relationship between STAR × LA × PARt and stem diameter increment, decreased over time as a result of a relative decrease in the proportion of photosynthetic tissues to total sapling biomass.
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http://hdl.handle.net/10459.1/68257
DOI
https://doi.org/10.1093/treephys/27.8.1073
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Tree Physiology, 2007, vol. 27, num. 8, p. 1073-1082
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  • Articles publicats (CTFC) [285]

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