Article (Scientific journals)
Soil Solution Nitrogen and Cations Influenced by (NH4)2SO4 Deposition in a Coniferous Forest
Carnol, Monique; Ineson, Phil; Dickinson, A. L.
1997In Environmental Pollution, 97 (1-2), p. 1-10
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Keywords :
aluminium; nitrification; ammonium sulphate; soil solution; acidification
Abstract :
[en] The effects of chronically enhanced (NH(4))(2)SO(4) deposition on ion concentrations in soil solution and ionic fluxes were investigated in a Picea abies plot at Grizedale forest, NW England. Soil cores closed at the base and containing a ceramic suction cup sampler were 'roofed' and watered every 2 weeks with bulk throughfall collected in the field. Treatments consisted of the inclusion of living roots from mature trees in the lysimeters and increasing (NH(4))(2)SO(4) deposition (NS treatment) to ambient + 75 kg N ha(-1) a(-1). Rainfall, throughfall and soil solutions were collected every 2 weeks during 18 months, and analysed for major cations and anions. NO(3)(-) fluxes significantly increased following NS treatment, and were balanced by increased Al(3+) losses. Increased SO(4)(2-) concentrations played a minor role in controlling soil solution cation concentrations. The soil exchange complex was dominated by Al and, during the experimental period, cores of all treatments 'switched' from Ca(2+) to Al(3+) leaching, leading to mean [Formula: see text] molar ratios in soil solution of NS treated cores of 0.24. The experiment confirmed that the most sensitive soils to acidification (through deposition or changing environmental conditions) are those with low base saturation, and with a pH in the lower Ca, or Al buffer ranges.
Disciplines :
Environmental sciences & ecology
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Carnol, Monique  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Ecologie végétale et microbienne
Ineson, Phil
Dickinson, A. L.
Language :
English
Title :
Soil Solution Nitrogen and Cations Influenced by (NH4)2SO4 Deposition in a Coniferous Forest
Publication date :
1997
Journal title :
Environmental Pollution
ISSN :
0269-7491
eISSN :
1873-6424
Publisher :
Elsevier, United Kingdom
Volume :
97
Issue :
1-2
Pages :
1-10
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 December 2009

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