Decomposition and nutrient dynamics of Norway spruce needle litter in a long-term optimum nutrition experiment. I. Organic matter decomposition. II. Nutrient dynamics. III. The influence of a denser forest on litter decomposition rate

abonos nitrogenados absorption de substances nutritives calcio calcium chemical composition composition chimique degradation fertilisation fertilizer application feuille forest litter fosfatos fosforo hojarasca forestal hojas leaves ligninas lignine lignins magnesio magnesium manganese manganeso nitrogen content nitrogen fertilizers nutrient uptake phosphate phosphates phosphore phosphorus picea abies potasio potassium teneur en azote