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The effects of SO 2 and O 3 on the foliar nutrition of Scots pine, Norway spruce and Sitka spruce in the Liphook open‐air fumigation experiment
Author(s) -
SHAW P. J. A.,
McLEOD A. R.
Publication year - 1995
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/j.1365-3040.1995.tb00359.x
Subject(s) - scots pine , fumigation , picea abies , sulfur , chemistry , nutrient , magnesium , horticulture , nitrogen , botany , environmental chemistry , agronomy , zoology , pinus <genus> , biology , organic chemistry
ABSTRACT Foliar elements were analysed in Scots pine, Sitka spruce and Norway spruce over a 6 year period before and during continuous exposure to SO 2 and O 3 in an open‐air fumigation experiment. Sulphur dioxide treatment elevated foliar sulphur concentration in all species, and there were increases in foliar nitrogen in the two spruce species but not in pine. The concentrations of cations were frequently increased by SO 2 treatment, but there was no correlation between the sulphur concentration of needles and their total cation charge. SO 2 ‐related elevations of foliar magnesium were correlated with the concentration of this element in soil solution, but the mechanism by which other cations were enhanced remains unclear. The only consistent effects on nutrient ratios were for SO 2 treatments to increase sulphur/cation ratios.