Seedling quality in Picea abies is affected by growing conditions and routines in forest nurseries

almacenamiento altura calor chaleur crecimiento croissance daylight etapas de desarrollo de la planta fertilisation fertilizer application forest nurseries frost frost damage growth hauteur heat height light regimes noruega norway pepiniere forestiere picea abies plant condition plant developmental stages production de plants de semis regimenes de luz repiquage resistencia a la temperatura saison seasons seedling production sprouting stockage storage temperatura temperature temperature resistance thawing transplanting trasplante viveros forestales