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Short‐scale distribution of copper fractions in a vineyard acid soil
Author(s) -
FernándezCalviño D.,
LópezPeriago E.,
NóvoaMuñoz J. C.,
AriasEstévez M.
Publication year - 2007
Publication title -
land degradation and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.403
H-Index - 81
eISSN - 1099-145X
pISSN - 1085-3278
DOI - 10.1002/ldr.833
Subject(s) - vineyard , copper , chemistry , oxalic acid , fractionation , cation exchange capacity , soil ph , soil water , horticulture , soil science , inorganic chemistry , environmental science , organic chemistry , biology
We studied short‐scale variation in the total concentration of copper and its fractions in a soil vineyard. Soil samples were collected at a depth of 0–20 cm between plant rows (1), between individual plants (2) and at their base (3) in a vine‐grown plot in NW Spain. The mean total content in Cu (Cu t ) in the soil was found to be 97 mg kg −1 and that of potentially available Cu (Cu EDTA ) 34 mg kg −1 . Copper bound to organic matter (Cu OM ) and to non‐crystalline inorganic soil components (Cu IA ) were the dominant fractions and accounted for 34% of total copper each. The contents in exchangeable (Cu e ), pyrophosphate‐extractable (Cu p ), oxalic/oxalate‐extractable (Cu o ) and total copper (Cu t ) exhibited statistically significant correlations with pH, sum of base cations (S), cation‐exchange capacity (CEC) and exchangeable calcium (Ca e ). Both total and fractional copper contents were higher in plant rows than between them, particularly in the centre of the plot. Also, Cu OM and Cu IA were higher in planting rows than between rows. These copper results may have been influenced by the vine‐growing practices of the area and also by the distribution of plants and their pruning. This variability pattern for Cu distribution is crucial with a view to minimising potential adverse effects of fungicides and optimising any reclamation treatments needed. Copyright © 2007 John Wiley & Sons, Ltd.