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Ratios of plant to soil concentrations of strontium-85 and their relation to exchangeable bases for soils and crops of Greece

Published online by Cambridge University Press:  27 March 2009

E. P. Papanicolaou ,
C. G. Apostolakis ,
V. Skarlou ,
C. Nobeli  and
P. Kritidis
E. P. Papanicolaou
Affiliation:
Institute of Biology
C. G. Apostolakis
Affiliation:
Institute of Biology
V. Skarlou
Affiliation:
Institute of Biology
C. Nobeli
Affiliation:
Institute of Biology
P. Kritidis
Affiliation:
Institute of Nuclear Technology, National Centre for Scientific Research ‘Demokritos’, 153 10 Aghia Paraskevi, Attica, Greece
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Summary

The relationship between values of 85Sr concentration ratios (CRs) and exchangeable bases, expressed in absolute (mmol/kg) or relative (percentage of cation exchange capacity (CEC)) terms, was considered using the results of a glasshouse pot experiment conducted in 1989, for soils and crops of Greece. Exchangeable calcium, expressed in mmol/kg, presented, in most instances, a significant (P = 0·05–0·01) or highly significant (P < 0·01) negative correlation with the CRs of various crops or plant parts, while exchangeable calcium plus magnesium or total exchangeable bases (expressed also in mmol/kg) showed an even better correlation (higher values of r, lower variability). Expression of the amounts of exchangeable bases in relative terms further improved the correlation coefficient in each comparison. The correlations between the percentage of exchangeable (Ca + Mg) or exchangeable bases and CRs, which were always negative, were significant or highly significant for all tested crops or plant parts. The correlation between CRs and soil properties was greatest for exchangeable (Ca + Mg) expressed as a percentage of CEC (r = -0·92) and followed the order: Exchangeable (Ca + Mg) as % of CEC ≈ exchangeable bases as % of CEC ≈ exchangeable (Ca + Mg) in mmol/kg ≈ exchangeable bases in mmol/kg > exchangeable Ca as % of CEC > exchangeable Ca in mmol/kg.

Quantitative relationships between CRs of the tested crops or plant parts and exchangeable calcium plus magnesium (% of CEC) of soils are also presented.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 119 , Issue 1 , August 1992 , pp. 79 - 82
Copyright
Copyright © Cambridge University Press 1992

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