The Israeli Journal of Aquaculture - Bamidgeh 54(3), 2002, 104-109

DISTRIBUTION OF DIFFERENT FORMS OF COPPER IN
FRESHWATER POND SOILS OF ORISSA, INDIA


S. Adhikari*
Central Institute of Freshwater Aquaculture, Kausalyagana, Bhubaneswar, Orissa, 751002, India

(Received 7.1.02, Accepted 26.3.02)

Key words: copper distribution, copper fractions, India, pond soil properties

Abstract

The distribution of native copper fractions in freshwater pond soils of Orissa and their relationship to important soil properties were studied. Total Cu and diethylene triamine penta acetic acid (DTPA) extractable Cu ranged 7.0-24.0 and 2.0-4.9 mg/kg soil, respectively, with mean values of 12.7 and 3.1 mg/kg. The amounts of exchangeable, weakly adsorbed, moderately adsorbed, strongly adsorbed and organic matter associated Cu ranged 1.7-2.6%, 3.5-6.0%, 3.3-6.6%, 0.7-2.2% and 0.8-7.2% of the total Cu, respectively. Cu occluded or bound by carbonates or other acid-soluble mineral fractions was 1.5-6.1% of the total Cu. Most of the Cu (58-91%) was in the residual fraction. All the chemical fractions of Cu significantly correlated with each other and with the organic carbon status of the soils.

*Corresponding author. E-mail: sadhikari66@indiatimes.com
home