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Composition and dynamics of the fungal population in a typical Phaeozem luvico in Argentina

Resumen

he decomposer soil community maintains the arable soil ecosystem for the nutrient turnover. Here, we studied the dynamics of the soil fungal populations in a typical Phaeozem luvico in Argentina and related it to the management practices. Soil samples (at 0–10cm depth) were collected from a field cultivated with wheat, at different sampling times: at post-harvest, before sowing, and at tillering. The relative abundance of individuals in the population on Nash Snyder and Oxgall agar media was assessed as colony forming units (CFU). The fungal population was classified by numerical taxonomy at the different sampling times. The highest values of CFUg−1of soil were found at post-harvest under reduced tillage and differed significantly from those at conventional tillage. The generaTrichoderma,Fusarium,Aspergillus,Penicillium, andFusarium oxysporumwere present in the largest number of samples and discriminated the fungal community between times. This discrimination could be related to alterations in the availability of carbon sources during stubble degradation at post-harvest and before sowing and were of lesser importance at tillering.

Palabras clave
soil management practices
soil fungal population
dynamics, r and K strategists
http://creativecommons.org/licenses/by-nc-nd/4.0/

Esta obra se publica con la licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0)

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