Abstract

SILVA-PARRA, Amanda; COLMENARES-PARRA, Carlos  and  ALVAREZ-ALARCON, Jorge. MULTIVARIATE ANALYSIS OF SOIL FERTILITY IN ORGANIC COFFEE SYSTEMS IN PUENTE ABADIA VILLAVICENCIO. rev.udcaactual.divulg.cient. [online]. 2017, vol.20, n.2, pp.289-298. ISSN 0123-4226.

Puente Abadía is for excellence a coffee growing area of the municipality of Villavicencio, department Meta, Colombia, where organic coffee systems OCS are cultivated. The agronomic management of the crop can influence its soil chemical properties. Multivariate analysis can permit to define some chemical soil limits and will be a future input to optimize the nutrient management. Twelve OCS were sampled in the zone that showed similarity in terms of production system, agronomic management and environmental conditions. Data were analyzed by descriptive statistics, linear correlations and multivariate clustered and principal components PC methods. High variability in OCS chemical properties were detected. The highest variation coefficient CV was presented in Mg 135.09%. The analysis of the principal components (APCs) showed that the first two PC explained more than 50% of the total variance. The cluster analysis of the OCS revealed high variability, defined in two large groups: group 1 brought together OCS dominated by interchangeable Al³⁺ including 3 of the 12 OCSs and group 2 brought together 9 of the OCS, mainly defined by high content in soil organic matter (SOM). The variability showed was possibly influenced by liming and organic fertilization.

Keywords : Interchangeable acidity; soil analysis; liming; organic matter; chemical properties.

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