Dry weight and N partitioning in relation to substrate N supply, internal N status and developmental stage in jack pine (Pinus banksiana Lamb.) seedlings: implications for modelling

azote biomasa biomass biomasse chemical composition composition chimique developmental stages etapas de desarrollo fisiologia vegetal modele modelos models nitrogen nutrition des plantes oferta offre peso pinus banksiana plant nutrition plant physiology plantule poids seedlings supply weight