Effect of management (ecological and conventional) on functional groups of soil microorganisms in coffee agroecosystems with different resilience to climate variability, Colombia

Andrea Fernández Garzón,Lizeth Manuela Avellaneda Torres,Laura Patricia Perdomo Rivas

doi:10.4025/actascibiolsci.v42i1.48620

Andrea Fernández Garzón, Lizeth Manuela Avellaneda Torres + Show 1 more

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https://doi.org/10.4025/actascibiolsci.v42i1.48620

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Abstract

The effect of management (ecological and conventional) on functional groups of microorganisms of soil in agroecosystems with different resilience scores reported to climate variability in Anolaima, Colombia was evaluated. Were found clustering associated with management and cellulolytic bacteria and fungi abundances. No differences found in diversity of phosphate solubilizing or nitrogen-fixing microorganisms, related to management. The diversity of microbial functional groups was affected by the climatic condition of sampling season. Management was relevant in relationships between resilience scores to climate variability and cellulolytic microorganisms; in ecological agroecosystems, biodiversity knowledge, agroecological main structure, and the participation of farmers in organizations were important

Highlights

IntroductionAgroecosystem management is based on the use of monoculture as a means of production, the application of chemical products such as fertilizers and agrochemicals, and the use of heavy machinery, which are meant to improve productivity
The average percentage of organic carbon (OC) obtained in the three ecological farms is 7.99% and in the three conventional farms it is 5.09%, indicating that OC percentage is very high for all farms studied (Instituto Geográfico Agustín Codazzi [IGAC], 2000)
Were found clustering associated with management and cellulolytic bacteria and fungi abundances

Summary

Introduction

Agroecosystem management is based on the use of monoculture as a means of production, the application of chemical products such as fertilizers and agrochemicals, and the use of heavy machinery, which are meant to improve productivity. This production system has led to soil acidification, a disadvantage that causes loss of fauna, erosion, deterioration of the biophysical environment, and a reduction in organic matter content (Fallas, Chacón, & Castro, 2009). Studies carried out on ecological systems in order to determine their contribution to communities’ sustainability have shown the improvement of agroecosystems under these types of practices (Altieri & Nicholls, 2000; Grajales, Gómez, Quintero, & Grisales, 2006; Osorio & Alcántara, 2004)

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