TY - JOUR

T1 - Variabilität der Sulfatsorption in einem Gley Podsol aus Sand unter Kiefernforst

AU - Böttcher, Jürgen

AU - Puhlmann, Martina

AU - Springob, Günther

N1 - Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 1999

Y1 - 1999

N2 - In acid forest soils sulfate can be stored by sorption processes. We studied the vertical heterogeneity and the horizontal variability of sulfate sorption in a sandy forest soil under a pine stand. Disturbed soil samples were taken from the horizons of a Gleyic Podzol (vertical heterogeneity). From a 120-m transect, 25 soil samples were taken from depth increment 35-50 cm and 65-80 cm at 5-m intervals by means of a hand auger (horizontal variability). in batch experiments, sulfate sorption isotherms were measured for all profile and transect samples. The Freundlich equation is suitable to describe the individual isotherms. The sulfate sorption isotherms show considerable differences in the horizons of the profile, systematic relations between the isotherm parameters and soil properties are not obvious, in order to quantify the spatial variability of the sulfate sorption isotherms, a scaling technique is used. The spatial distribution of scale factors for depth 35-50 cm along the transect reveals a periodicity of about 17m length. The same recurrent pattern is also identified in the spatial distribution of the cumulative sulfate deposition by canopy throughfall along the transect, and in the spatial distribution of contents of iron and aluminium oxides soluble in oxalic acid at depth level 35-50 cm. This does, however, not refer to organic carbon content and pH at this depth. From these results it is concluded that in this soil at depth 35-50 cm oxide contents are related to the amount of sulfate deposition by throughfall. In spatial ranges with high sulfate and thus acid deposition, oxide contents of the soil are decreased by accelerated podzolization, and therefore, also the sulfate sorption of the soil is low in these ranges. The period length of this recurrent pattern of about 1-7 m is probably only an apparent period length that results from aliasing, because a very probably real periodicity of 3-4 m length, related to the canopy edge distribution of the pine trees along the transect, is sampled at an interval of 5 m. In the subsoil (65-80 cm depth) such relations could not be detected.

AB - In acid forest soils sulfate can be stored by sorption processes. We studied the vertical heterogeneity and the horizontal variability of sulfate sorption in a sandy forest soil under a pine stand. Disturbed soil samples were taken from the horizons of a Gleyic Podzol (vertical heterogeneity). From a 120-m transect, 25 soil samples were taken from depth increment 35-50 cm and 65-80 cm at 5-m intervals by means of a hand auger (horizontal variability). in batch experiments, sulfate sorption isotherms were measured for all profile and transect samples. The Freundlich equation is suitable to describe the individual isotherms. The sulfate sorption isotherms show considerable differences in the horizons of the profile, systematic relations between the isotherm parameters and soil properties are not obvious, in order to quantify the spatial variability of the sulfate sorption isotherms, a scaling technique is used. The spatial distribution of scale factors for depth 35-50 cm along the transect reveals a periodicity of about 17m length. The same recurrent pattern is also identified in the spatial distribution of the cumulative sulfate deposition by canopy throughfall along the transect, and in the spatial distribution of contents of iron and aluminium oxides soluble in oxalic acid at depth level 35-50 cm. This does, however, not refer to organic carbon content and pH at this depth. From these results it is concluded that in this soil at depth 35-50 cm oxide contents are related to the amount of sulfate deposition by throughfall. In spatial ranges with high sulfate and thus acid deposition, oxide contents of the soil are decreased by accelerated podzolization, and therefore, also the sulfate sorption of the soil is low in these ranges. The period length of this recurrent pattern of about 1-7 m is probably only an apparent period length that results from aliasing, because a very probably real periodicity of 3-4 m length, related to the canopy edge distribution of the pine trees along the transect, is sampled at an interval of 5 m. In the subsoil (65-80 cm depth) such relations could not be detected.

KW - Scaling

KW - Soil acidity

KW - Sulfate sorption

KW - Variability

UR - http://www.scopus.com/inward/record.url?scp=2142858688&partnerID=8YFLogxK

U2 - 10.1002/(SICI)1522-2624(199903)162:2<113::AID-JPLN113>3.0.CO;2-1

DO - 10.1002/(SICI)1522-2624(199903)162:2<113::AID-JPLN113>3.0.CO;2-1

M3 - Artikel

AN - SCOPUS:2142858688

VL - 162

SP - 113

EP - 121

JO - Journal of Plant Nutrition and Soil Science

JF - Journal of Plant Nutrition and Soil Science

SN - 1436-8730

IS - 2

ER -