Resumen

EFFRON, Diana N; SARTI, Gabriela C; QUINTEROS, María C  y  CATAN, Silvia I. Influence of Implanted tree Species on Biological and Biochemical Parameters in a Forest soil of Chubut, Argentina. Inf. tecnol. [online]. 2012, vol.23, n.2, pp. 87-92. ISSN 0718-0764.  doi: 10.4067/S0718-07642012000200010.

The influence of some tree species on biological and biochemical properties of a forest soil was studied with the purpose of establishing criteria to achieve a sustainable development of a forest system. The study site is a forest soil of Chubut, in the Argentinean Patagonia. Surface soil samples were taken of three plots with a dominant species each one: Oak (Quercus robur), Ash (Fraxinus excelsior L.) and Radiata Pine (Pinus radiata D. Don.). Microbial respiration, dehydrogenase and acid phosphatase activities, counts of aerobic and amylolytic bacteria, actinomyces and fungi were determined in soil samples, while phosphorous was determines in leaves. The results showed important differences of these parameters for the different species considered in the study, differences that are explained by the different chemical composition of the vegetal species.

Palabras clave : forest soil; microbial respiration; dehydrogenase activity; acid phosphatase activity; microbial counts.