[en] Foliar analysis was undertaken in two plots of Picea abies (L.) Karst., located in a watershed of Haute Ardenne, Belgium, in order to estimate the decline of the trees. Apart from a general Mg deficiency, the concentrations of the needles were in the same range as those determined in other European stands. Comparisons between healthy and declining trees within each plot revealed a general pattern of decline similar to that observed elsewhere in Western Europe. This was shown as lower Ca, Mg, Zn concentrations and water content and higher N and P concentrations of the needles collected from declining trees. It is concluded that this decline could be due to N over fertilization by the atmospheric deposition. The difference of decline between the two plots was attributed to the turnover rate of the soil organic layer which was less intensive in the most damaged plot.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Hambuckers, Alain ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Taxonomie végétale et biologie de la conservation
Remacle, Jean ; Université de Liège - ULiège > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences)
Language :
English
Title :
Nutritional status of declining spruce (Picea abies (L.) Karst.) - Effect of soil organic matter turnover rate
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