Die Wirkung von Klärschlamm auf die Kationenumtauschverhältnisse in einer Lößlehm-Parabraunerde unter Fichte

The effect of sludge application on cation exchange capacity of a loess loam Parabraunerde under spruce 5 years after sludge application the following effects on cation exchange capacity were found: Sludge application influenced soil chemistry to a depth of 10 cm. Cation exchange capacity was almost doubled in the layer of 0–5 cm, whereas in 5–10 cm only a slight rise was recorded. The proportion of exchangeable cations held by the soil, especially the relation between Ca: Al, was changed from 10:60 to 50:30 in the layer of 0–5 cm. The change was substantially lower in 5–10 cm. By separate analyses of samples the variation of cation exchange capacity as well as of the proportion of exchangeable cations was estimated.