<abstract xmlns="http://www.w3.org/1999/xhtml">Biomass allocation in seedlings and saplings at different stages of growth is important information for studying the response of species to site conditions. The objectives of the paper are: (a) to analyse the relationship between height and biomass in young Norway spruce and European beech trees, (b) to study the influence of the leaf area on ontogenetic growth stages and biomass sequestration capacity on the regeneration of these two species. 96 seedlings (H &lt; 30 cm) and saplings (31 &lt; H &lt; 130 cm) were collected in different light conditions in a case study in the Alps (Trentino province, Italy). Leaf Area Index and shoot/root ratio were used as indicators of the ecological conditions (e.g. light, soil moisture, nutrient status) able to influence the seedlings and saplings growth. Two non-linear regressions were fitted to analyse the relationship between height and biomass and to develop the aboveground and below-ground allometric equations. Non-linear regressions show that sapling or seedling height is a good predictor of above-ground and below-ground biomass with a R2aj above 0.8 for all equations and a R2aj above 0.9 for above-ground biomass of Norway spruce. The results show that silvicultural practices may influence the regeneration patterns and increase the biomass allocation rate influencing stand density and canopy cover.</abstract>

Biomass allocation in seedlings and saplings at different stages of growth is important information for studying the response of species to site conditions. The objectives of the paper are: (a) to analyse the relationship between height and biomass in young Norway spruce and European beech trees, (b) to study the influence of the leaf area on ontogenetic growth stages and biomass sequestration capacity on the regeneration of these two species. 96 seedlings (H < 30 cm) and saplings (31 < H < 130 cm) were collected in different light conditions in a case study in the Alps (Trentino province, Italy). Leaf Area Index and shoot/root ratio were used as indicators of the ecological conditions (e.g. light, soil moisture, nutrient status) able to influence the seedlings and saplings growth. Two non-linear regressions were fitted to analyse the relationship between height and biomass and to develop the aboveground and below-ground allometric equations. Non-linear regressions show that sapling or seedling height is a good predictor of above-ground and below-ground biomass with a R2aj above 0.8 for all equations and a R2aj above 0.9 for above-ground biomass of Norway spruce. The results show that silvicultural practices may influence the regeneration patterns and increase the biomass allocation rate influencing stand density and canopy cover.

Biomass allocation in natural regeneration of Fagus sylvatica and Picea abies trees in Italian Alps

Project Centre “MOUNTFOR”, European Forest Institute (EFI), San Michele A/A (TN), 38010, Italy

Forest Monitoring and Planning Research Unit, Council for Agricultural Research and Economics, Trento, 38123, Italy

Forestry Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Biomass allocation in seedlings and saplings at different stages of growth is important information for studying the response of species to site conditions....

Biomass allocation in natural regeneration of Fagus sylvatica and Picea abies trees in Italian Alps

Publié en ligne: 25 juin 2015

Pages: 35 - 46

Reçu: 27 oct. 2014

Accepté: 29 déc. 2014

DOI: https://doi.org/10.2478/fsmu-2014-0009

Mots clés
Norway spruce, European beech, allometric equation, saplings, seedlings, Leaf Area Index

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Biomass allocation in natural regeneration of Fagus sylvatica and Picea abies trees in Italian Alps

Publié en ligne: 25 juin 2015

Pages: 35 - 46

Reçu: 27 oct. 2014

Accepté: 29 déc. 2014

DOI: https://doi.org/10.2478/fsmu-2014-0009

Mots clésNorway spruce, European beech, allometric equation, saplings, seedlings, Leaf Area Index

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Norway spruce, European beech, allometric equation, saplings, seedlings, Leaf Area Index