Potential universal applicability of soil bioindicators: Evaluation in three temperate ecosystems
Por:
González M.G., Gallardo J.F., Gómez E., Masciandaro G., Ceccanti B., Pajares S.
Publicada:
1 ene 2007
Categoría:
Soil Science
Resumen:
Three selected soils from three countries with temperate climates have been analyzed. Two of the soils are silty loams (Buenos Aires, Argentina, and Salamanca, Spain) and the third one is a sandy loam (Peccioli, Italy). Soil samples representing three agricultural managements were obtained from the top layer (0-10 cm), i.e. intensively cultivated, cultivated and undisturbed native soils. Soil organic carbon (SOC), total nitrogen (Nt), ATP, urease, protease, phosphatase, ?-glucosidase, dehydrogenase (DHA), and arginine ammonification (ARA) were determined and compared. SOC and Nt were significantly higher (P < 0.01) in native than in cultivated and intensively cultivated soils. A good correlation (P < 0.05) was found between ATP, hydrolase activities, ARA, and SOC and Nt, indicating that all these parameters were related to the biological properties and biochemical activity. Then, these biological parameters can be used as bioindicators of agriculture-induced changes in soils. DHA did not correlate with the SOC and Nt contents, or protease activities, indicating that the soil ecosystems had low concentrations of exogenous substrates to metabolize and that micro-organisms were in a reduced state of activity.
Filiaciones:
González M.G.:
FAUBA, Cátedra de Edafología, Av. San Martín 4453, 1417 Buenos Aires, Argentina
Gallardo J.F.:
CSIC Instituto de Recursos Naturales de Merinas, Aptado257, Salamanca 37071, Spain
Gómez E.:
Facultad de Cs Agrarias, UNR, Cátedra de Microbiología Agrícola, Campo Experimental Villarino, Zavalla 2125 Sta Fe, Argentina
Masciandaro G.:
CNR, Instituto de la Chimica del Terreno, Via Condini, Pisa 7856125, Italy
Ceccanti B.:
CNR, Instituto de la Chimica del Terreno, Via Condini, Pisa 7856125, Italy
Pajares S.:
CSIC Instituto de Recursos Naturales de Merinas, Aptado257, Salamanca 37071, Spain
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