Biochemical characterization of biological activity in very young mine soils |
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| Authors: | F Gil-Sotres M C Trasar-Cepeda C Ciardi B Ceccanti M C Leirós |
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| Institution: | (1) Departmento de Edafología y Q. Agrícola, Facultad de Farmacia, E-15706 Santiago de Compostela, Spain;(2) E.U.I. Bioquímica de Suelos, CSIC, E-15780 Santiago de Compostela, Spain;(3) Istituto per la Chimica del Terreno, Via Corridoni 78, I-56100 Pisa, Italy |
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| Abstract: | Summary A number of biochemical parameters reflecting biological activity (respiration, ATP, enzyme activities) were determined in 0- to 7-year-old lignite mine soils. C (as CO2) and ATP contents and hydrolytic enzyme activities all increased with soil age. The kinetics of CO2 release showed that both labile and recalcitrant C-bearing substrates were mineralized, the mineralization constant of C decreased with soil age, but were always greater than those of native soils. The percentage of N mineralization, which tended to decrease with soil age, resulted in all cases in a predominance of ammoniacal forms. These findings suggest that since organic C and N accumulated with age in these soils, the C and N cycle is established progressively. |
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| Keywords: | Soil biochemical properties Soil respiration Soil enzymes Reclamation Lignite-mine soils |
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