期刊名称：Beiträge aus der Nordwestdeutschen Forstlichen Versuchsanstalt
印刷版ISSN：1865-6994
出版年度：2008
卷号：1
页码：15-15
出版社：Universitäts-Verlag Göttingen
摘要：Differences and similarities in the nutrient status and nutrient budget of three
mature beech ecosystems with different site conditions are presented. At the sites,
G.ttinger Wald, Zierenberg and Solling, the soils differ substantially with respect
to their acid/base status. Soils at the G.ttinger Wald site have developed from
limestone, and the whole profile is at the carbonate buffer range, whereas the soils
derived from weathered basalt debris at the Zierenberg site show obvious early
signs of acidification in the top layers. At the Solling site the soil in the rooting
zone of the new red sandstone is at the aluminium buffer range. At this site a
considerable proportion of nutrients is stored in the top organic layer.
The atmospheric deposition of acids is very similar at the three sites, and has
been reduced substantially during the last decades. Yet the deposition of nitrogen
decreased only slightly, and is much higher than that required for growth. Nitrogen
seepage at the Solling site was very low. Nitrogen losses at the G.ttinger Wald, and
particularly the Zierenberg site are much higher, with an increasing trend during
the observation period, resulting in a negative average nitrogen budget at
Zierenberg site. At the Solling site, a negative calcium budget has been observed
since 1990. This highlights the importance of liming on new red sandstone sites,
and the need for cautious utilisation of the nutrient-rich smallwood to avoid unnecessary
nutrient withdrawal from these sites.
关键词：beech, Fagus sylvatica, nitrogen saturation, acidification, element
budgets, soil changes
