ISSN:
1573-0867
Keywords:
DOC
;
forest soil amelioration
;
liming
;
macropore flux
;
nitrification
;
rock powder
;
soil solution
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract The initial effects of practical orientated lime and rock powder treatments on soil solution chemistry of a dystric cambisol are assessed by percolation experiments with undisturbed soil cores. During percolation coarse macropores remained air filled (water suction 10–60 hPa). This method may be seen as a `pedological tissue test' where in a time-lapse-experiment effects and side effects of forest fertilizations are monitored by analyzing the macropore water flux with high spatial resolution. Lime application caused a DOC-mobilization in the Ah horizon and an additional nitrification in the Bv horizon. The DOC formation is triggered by the need to replace unstable bicarbonate anions when the pH of the macropore water decreases drastically. The lime induced DOC output from the Ah horizon is a potential energy source for heterotrophic nitrifiers in the Bv horizon and may explain the additional nitrate formation. Rock powder addition caused mainly an increased K-flux into the mineral soil and showed no significant side effects. However, benefits comparable to liming can only be obtained, if rock powder is applied in 3–4 times higher dosages.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009714927385
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