Quantifying the effect of nitrogen-induced physiological and structural changes on poplar growth using a carbon-balance model
MetadataShow full item record
We evaluate the importance of changes in photosynthetic capacity, respiration rates, root shoot ratio, pipe model parameters and specific leaf area in the early-growth response of hybrid poplar to nitrogen availability. Juvenile growth simulations for trees with three different levels of leaf nitrogen
concentration (Nleaf) (low (1.2%), medium (2.4%) and high (3.6%)) were conducted with the carbon-balance model CROBAS. Five-year growth simulations showed the diameter and height of poplar trees to be, respectively, four and three times larger in plants with 2.4% Nleaf compared with those with 1.2% Nleaf. Increasing Nleaf from 2.4 to 3.6% resulted in 34 and 16% higher diameter and height growth of trees. According to the model, changes in the photosynthetic capacity accounted for most of the differences in growth between trees with different levels of Nleaf; the other parameters were much less influential. This suggests that in fast-growing early-successional broadleaved species such as poplars, physiological rather than allocational and morphological traits predominate in determining growth, at least under non-limiting light conditions.
Is part ofTree Physiology, 2011, vol. 31, núm. 4, p. 381-390
European research projects
Showing items related by title, author, creator and subject.
Growth, allocation and leaf gas exchanges of hybrid poplar plants in their establishment phase on previously forested sites: effect of different vegetation management techniques Coll Mir, Lluís; Messier, Christian; Delagrange, Sylvain; Berninger, Frank (Institut National de la Recherche Agronomique (INRA)EDP Sciences, 2007-04-11)The effect of different vegetation control methods (mowing and cultivation between plantation rows, herbicide application and cover plant sowing) on hybrid poplar (P. maximowiczii $\times$ balsamifera) growth, biomass ...
Domenicano, Susy; Coll Mir, Lluís; Messier, Christian; Berninger, Frank (Springer Nature, 2011-03-02)The study analyses the effects of two different forms of nitrogen fertilisation (nitrate and ammonium) on root structure and water uptake of two hybrid poplar (Populus maximowiczii x P. balsamifera) clones in a field ...
Modelling the effect of climate-induced changes in recruitment and juvenile growth on mixed-forest dynamics: the case of montane-subalpine Pyrenean ecotones Améztegui González, Aitor; Coll Mir, Lluís; Messier, Christian (Elsevier, 2015)Most predictive models forecast significant upward displacement of forest species due to increases in temperatures, but not all the species respond in the same way to changes in climate. In temperate or mountain systems, ...