ISSN:
1573-2932
Keywords:
Forest liming
;
dolomite
;
soils
;
runoff
;
calcium
;
magnesium
;
potassium
;
aluminium
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The dry forest soils (80%) of a 3.3 ha catchment in Gårdsjön, were treated with 1.5 ton/ha dolomite in 1984. In half the catchment an additional dose of 4.5 ton/ha was added in 1986 (i.e. totaly 6 ton/ha). By 1991 the concentrations of exchangeable calcium and magnesium had increased by 450% to 800% in the humus layer and upper 0–5 cm of the mineral soils and by 500% and 300%, respectively, in the 5–10 cm and 10–20 cm soil depth in the 6 ton/ha part. By 1.5 ton, Ca and Mg increased in humus and 0–5 cm in the mineral soil. Potassium decreased in the humus and the mineral soil with both 1.5 ton and 6 ton per ha. The accumulated output of K by runoff was however only 1 kg during the 6 years until 1992, which indicates that the losses from the soil also may have resulted in increased uptake by the forest. Tree growth and nutrient content in current needles was, however, unchanged. Increased contents of Mg, Ca and Zn was observed in some species of ground vegetation. Nitrate and ammonium concentrations and fluxes in runoff were identical to the reference catchment, while inorganic Al and Mn decreased by 40–50% and H+ by 30%. The accumulated extra output by runoff of Mg was about 7% and of Ca 0.6% of the amounts applied by the two treatments in 1984 and 1986.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00476966
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