The Ratio of Shoot Silhouette Area to Total Needle Area in Scots Pine Export

@article{citeulike:1365602, abstract = {The dependence of light interception efficiency on shoot structure was studied. The silhouette areas of 258 Scots pine (Pinus sylvestris L.) shoots inclined at different angles were measured, and the corresponding silhouette area to total needle area ratios (STAR) were determined. For each shoot, a mean silhouette to total needle area ratio (STAR) with respect to a spherical shoot orientation was calculated. STAR varied between 0.09 and 0.21 and averaged 0.14. For spherically oriented individual needles or leaves, the corresponding mean projection of unit foliage area is 0.25. Thus, the light interception efficiency of the shoots as indicated by STAR-values was on average reduced by 43\% because of mutual shading of needles on the shoots. The silhouette areas and STAR-values were also calculated theoretically using a previous model of shoot geometry, and these values were compared to the empirical measurements.}, author = {Oker-Blom, P. and Smolander, H.}, citeulike-article-id = {1365602}, journal = {Forest Science}, keywords = {clumping, coniferous, light-interception}, month = {December}, number = {4}, pages = {894--906}, posted-at = {2007-06-05 14:35:04}, priority = {4}, title = {The Ratio of Shoot Silhouette Area to Total Needle Area in Scots Pine}, volume = {34}, year = {1988} }

TY - JOUR ID - citeulike:1365602 L3 - citeulike-article-id:1365602 N2 - The dependence of light interception efficiency on shoot structure was studied. The silhouette areas of 258 Scots pine (Pinus sylvestris L.) shoots inclined at different angles were measured, and the corresponding silhouette area to total needle area ratios (STAR) were determined. For each shoot, a mean silhouette to total needle area ratio (STAR) with respect to a spherical shoot orientation was calculated. STAR varied between 0.09 and 0.21 and averaged 0.14. For spherically oriented individual needles or leaves, the corresponding mean projection of unit foliage area is 0.25. Thus, the light interception efficiency of the shoots as indicated by STAR-values was on average reduced by 43% because of mutual shading of needles on the shoots. The silhouette areas and STAR-values were also calculated theoretically using a previous model of shoot geometry, and these values were compared to the empirical measurements. IS - 4 JF - Forest Science EP - 906 TI - The Ratio of Shoot Silhouette Area to Total Needle Area in Scots Pine VL - 34 SP - 894 KW - clumping KW - coniferous KW - light-interception AU - Oker-Blom, P AU - Smolander, H PY - 1988/12// ER -