The soil microbiological properties especially those related with the fluxes of energy and nutrient cycling, respond promptly to changes in soil conditions, often much earlier than organic carbon and, in this way, are early indicators of alterations in soil quality.
In this study, we compared the microbiological activity basal respiration , microbial biomass and derived ecophysiological ratios of topsoils cm collected from eight farms in the municipalities of Merida and Trujillo that practice traditional agroforestry or shaded coffee , conventional sun coffee or intensive monoculture and organic agroforestry or shaded coffee production. The organic agriculture farms showed the highest contents of total organic carbon, water soluble carbon, basal respiration and microbial biomass compared with traditional and conventional farms.
This means a more sustainable coffee system with better conservation of natural resources and environment-friendly production. On conventional farms, added fertilizers and pesticides negatively affect microorganism performance and are more inefficient in terms of carbon and energy use.
Key words: soil biological indicators, basal respiration, microbial quotient, microbial efficient quotient. Algunos autores como Kashuk et al. Los valores de este estudio se asemejan a los reportados por Pabst et al. Los valores de este estudio son similares a los reportados por Almeida et al. Los resultados de este estudio se asemejan a los reportados por Theodoro et al. En las fincas bajo manejo tradicional, los cafetales son de mayor edad con lo cual podemos considerar que son ecosistemas maduros y estables y presentaron los menores valores de qCO 2 , en concordancia con los postulados de Odum Otros autores como Leita et al.
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