NDLI: The ecological significance of the coarse soil fraction for Picea abies (L.) Karst. seedling nutrition

Content Provider	Springer Nature Link
Author	Koele, N. Hildebrand, E. E.
Copyright Year	2008
Abstract	Recent studies showed that the coarse fraction of soils can have a considerable stock of short-term available nutrients. However, a direct proof that coarse soil fragments have significant nutritional functions in forest ecosystems is missing. In a 23 week microcosm experiment with controlled in- and output, mycorrhizal (Laccaria bicolor S238N) and non-mycorrhizal Norway spruce seedlings (Picea abies (L.) Karst.) were grown on either coarse soil fragments (dark paragneiss, Black Forest, S-W Germany) or quartz only. The microcosms were irrigated with a solution adjusted to the mean ionic composition of the soil solution in the reference profile, but devoid of Ca and Mg. The uptake rates of Ca and Mg by spruce seedlings were sufficient to allow normal root and shoot growth. Mycorrhization was low and did not have a significant influence on seedling nutrition. The oxalic anion was found in concentrations below 1.5 mg L$^{−1}$ in the leachate, approximately corresponding to a C$_{2}$O$_{4}$ $^{2−}$-saturation in equilibrium with precipitated calcium oxalate. Cation budgets and relationships among the cation species suggest that exchange processes were the main trigger of Ca and Mg mobilisation and uptake rather than protolytic weathering by exudation of carboxylic acids. The exchange processes may be attributed to weathering cracks filled with fine material of high base saturation. Therefore it is concluded that the short-term nutritional functions of coarse soils in forest sites are significant, and exchange mechanisms in the “stone protected fine earth” are in principal the same as they are known for the “free fine earth”.
Starting Page	163
Ending Page	174
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	312
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-07-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biogeochemical cycles Carboxylic acids Cation exchange Microcosm Stones Weathering Ecology Plant Physiology Soil Science & Conservation Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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Antifungal properties of Norway spruce (Picea abies (L.) Karst.) seedling homogenates

Relationships between tree dimension and coarse root biomass in mixed stands of European beech (Fagus sylvatica L.) and Norway spruce (Picea abies[L.] Karst.)

Nitrogen and drought effects on ectomycorrhizae of Norway spruce [Picea abies L.(Karst.)]

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Effects of elevated soil solution Al concentrations on fine roots in a middle-aged Norway spruce (Picea abies (L.) Karst.) stand

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Effects of acid irrigation and liming on nitrate reduction and nitrate content of Picea abies (L.) Karst. and Oxalis acetosella L.

The ecological significance of the coarse soil fraction for Picea abies (L.) Karst. seedling nutrition

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