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Evaluating soil quality in silvopastoral systems by the Soil Management Assessment Framework (SMAF) in Colombian Amazon

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Abstract:

Monitoring the infl uence of livestock systems' on soil quality (SQ) in the Colombian Amazon region is importantto ensure the sustainability of those agroecosystems. Here we used the Soil Management Assessment Framework (SMAF) to assessthe SQ responses to land-use change associated with the adoption of silvopastoral systems (SPS) at two study sites in the ColombianAmazon region. A chronosequence formed by three land-use systems, refl ecting the typical land transition performed in the region, wasestablished at each study site: i) native vegetation (NV), ii) pasture (PAST), and iii) SPS. Soil samples were collected at 10 cm deepincrements until reaching 30 cm deep. Then soil pH, potassium, available phosphorus, microbial carbon, soil organic carbon, and bulkdensity were measured. In addition, data from Visual Evaluation of Soil Structure (VESS) were correlated. Data were interpretated usingSMAF algorithms, and a Soil Quality Index (SQI) was calculated. Our data showed an SQ degradation due to land-use change from NVto PAST, with soils reducing their capacity of soils function from 0.72 to 0.62. The establishment of SPS over extensive PAST restoredsoil quality (SQI = 0.69) compared to PAST (both sites), even reaching similar SQI values to those observed in NV at site 1. The SMAFshowed to be a potential tool to monitor the SQ in low-fertility soils from the Colombian Amazon region. The VESS scores were alsocorrelated with SMAF - scores, proving to be a simple and complementary tool for farmers to monitor SQ in the Amazon region.

Tópico:

Sustainable Agricultural Systems Analysis

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Citations: 6
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Información de la Fuente:

SCImago Journal & Country Rank
FuenteCiência Agronômica/Revista ciência agronômica
Cuartil año de publicaciónNo disponible
Volumen53
IssueNo disponible
PáginasNo disponible
pISSN0045-6888
ISSNNo disponible

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