Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil
Shaded perennial agroforestry systems contain relatively high quantities of soil carbon (C) resulting from continuous deposition of plant residues; however, the extent to which the C is sequestered in soil will depend on the extent of physical protection of soil organic C (SOC). The main objective of this study was to characterize SOC storage in relation to soil fraction-size classes in cacao (Theobroma cacao L.) agroforestry systems (AFSs). Two shaded cacao systems and an adjacent natural forest in reddish-yellow Oxisols in Bahia, Brazil were selected. Soil samples were collected from four depth classes to 1 m depth and separated by wet-sieving into three fraction-size classes (>250 μm, 250–53 μm, and <53 μm)—corresponding to macroaggregate, microaggregate, and silt-and-clay size fractions—and analyzed for C content. The total SOC stock did not vary among systems (mean: 302 Mg/ha). On average, 72% of SOC was in macroaggregate-size, 20% in microaggregate-size, and 8% in silt-and-clay size fractions in soil. Sonication of aggregates showed that occlusion of C in soil aggregates could be a major mechanism of C protection in these soils. Considering the low level of soil disturbances in cacao AFSs, the C contained in the macroaggregate fraction might become stabilized in the soil. The study shows the role of cacao AFSs in mitigating greenhouse gas (GHG) emission through accumulation and retention of high amounts of organic C in the soils and suggests the potential benefit of this environmental service to the nearly 6 million cacao farmers worldwide.
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Amsterdam (Países Bajos): Springer,
2010
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Subjects: | THEOBROMA CACAO, ERYTHRINA, PLANTACION, PLANTAS DE SOMBRA, AGROFORESTERIA, BIOMASA, MATERIA ORGANICA DEL SUELO, GASES DE EFECTO INVERNADERO, CONTROL DE LA CONTAMINACION, |
Online Access: | https://doi.org/10.1007/s00267-009-9420-7 |
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KOHA-OAI-BVE:1278732021-11-24T20:51:45ZCarbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil 70040 Gama Rodrigues, E.F. 108508 Ramachandran Nair, P.K. 98330 Nair, V.D. 70039 Gama Rodrigues, A.C. 45958 Baligar, V.C. 89073 Machado, R.C.R. autores/as Amsterdam (Países Bajos): Springer,2010engpdfShaded perennial agroforestry systems contain relatively high quantities of soil carbon (C) resulting from continuous deposition of plant residues; however, the extent to which the C is sequestered in soil will depend on the extent of physical protection of soil organic C (SOC). The main objective of this study was to characterize SOC storage in relation to soil fraction-size classes in cacao (Theobroma cacao L.) agroforestry systems (AFSs). Two shaded cacao systems and an adjacent natural forest in reddish-yellow Oxisols in Bahia, Brazil were selected. Soil samples were collected from four depth classes to 1 m depth and separated by wet-sieving into three fraction-size classes (>250 μm, 250–53 μm, and <53 μm)—corresponding to macroaggregate, microaggregate, and silt-and-clay size fractions—and analyzed for C content. The total SOC stock did not vary among systems (mean: 302 Mg/ha). On average, 72% of SOC was in macroaggregate-size, 20% in microaggregate-size, and 8% in silt-and-clay size fractions in soil. Sonication of aggregates showed that occlusion of C in soil aggregates could be a major mechanism of C protection in these soils. Considering the low level of soil disturbances in cacao AFSs, the C contained in the macroaggregate fraction might become stabilized in the soil. The study shows the role of cacao AFSs in mitigating greenhouse gas (GHG) emission through accumulation and retention of high amounts of organic C in the soils and suggests the potential benefit of this environmental service to the nearly 6 million cacao farmers worldwide. Incluye referencias bibliográficas en las páginas 281-283Shaded perennial agroforestry systems contain relatively high quantities of soil carbon (C) resulting from continuous deposition of plant residues; however, the extent to which the C is sequestered in soil will depend on the extent of physical protection of soil organic C (SOC). The main objective of this study was to characterize SOC storage in relation to soil fraction-size classes in cacao (Theobroma cacao L.) agroforestry systems (AFSs). Two shaded cacao systems and an adjacent natural forest in reddish-yellow Oxisols in Bahia, Brazil were selected. Soil samples were collected from four depth classes to 1 m depth and separated by wet-sieving into three fraction-size classes (>250 μm, 250–53 μm, and <53 μm)—corresponding to macroaggregate, microaggregate, and silt-and-clay size fractions—and analyzed for C content. The total SOC stock did not vary among systems (mean: 302 Mg/ha). On average, 72% of SOC was in macroaggregate-size, 20% in microaggregate-size, and 8% in silt-and-clay size fractions in soil. Sonication of aggregates showed that occlusion of C in soil aggregates could be a major mechanism of C protection in these soils. Considering the low level of soil disturbances in cacao AFSs, the C contained in the macroaggregate fraction might become stabilized in the soil. The study shows the role of cacao AFSs in mitigating greenhouse gas (GHG) emission through accumulation and retention of high amounts of organic C in the soils and suggests the potential benefit of this environmental service to the nearly 6 million cacao farmers worldwide. THEOBROMA CACAOERYTHRINAPLANTACIONPLANTAS DE SOMBRAAGROFORESTERIABIOMASAMATERIA ORGANICA DEL SUELOGASES DE EFECTO INVERNADEROCONTROL DE LA CONTAMINACIONEnvironmental Management (EUA)https://doi.org/10.1007/s00267-009-9420-7 |
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THEOBROMA CACAO ERYTHRINA PLANTACION PLANTAS DE SOMBRA AGROFORESTERIA BIOMASA MATERIA ORGANICA DEL SUELO GASES DE EFECTO INVERNADERO CONTROL DE LA CONTAMINACION THEOBROMA CACAO ERYTHRINA PLANTACION PLANTAS DE SOMBRA AGROFORESTERIA BIOMASA MATERIA ORGANICA DEL SUELO GASES DE EFECTO INVERNADERO CONTROL DE LA CONTAMINACION |
spellingShingle |
THEOBROMA CACAO ERYTHRINA PLANTACION PLANTAS DE SOMBRA AGROFORESTERIA BIOMASA MATERIA ORGANICA DEL SUELO GASES DE EFECTO INVERNADERO CONTROL DE LA CONTAMINACION THEOBROMA CACAO ERYTHRINA PLANTACION PLANTAS DE SOMBRA AGROFORESTERIA BIOMASA MATERIA ORGANICA DEL SUELO GASES DE EFECTO INVERNADERO CONTROL DE LA CONTAMINACION 70040 Gama Rodrigues, E.F. 108508 Ramachandran Nair, P.K. 98330 Nair, V.D. 70039 Gama Rodrigues, A.C. 45958 Baligar, V.C. 89073 Machado, R.C.R. autores/as Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
description |
Shaded perennial agroforestry systems contain relatively high quantities of soil carbon (C) resulting from continuous deposition of plant residues; however, the extent to which the C is sequestered in soil will depend on the extent of physical protection of soil organic C (SOC). The main objective of this study was to characterize SOC storage in relation to soil fraction-size classes in cacao (Theobroma cacao L.) agroforestry systems (AFSs). Two shaded cacao systems and an adjacent natural forest in reddish-yellow Oxisols in Bahia, Brazil were selected. Soil samples were collected from four depth classes to 1 m depth and separated by wet-sieving into three fraction-size classes (>250 μm, 250–53 μm, and <53 μm)—corresponding to macroaggregate, microaggregate, and silt-and-clay size fractions—and analyzed for C content. The total SOC stock did not vary among systems (mean: 302 Mg/ha). On average, 72% of SOC was in macroaggregate-size, 20% in microaggregate-size, and 8% in silt-and-clay size fractions in soil. Sonication of aggregates showed that occlusion of C in soil aggregates could be a major mechanism of C protection in these soils. Considering the low level of soil disturbances in cacao AFSs, the C contained in the macroaggregate fraction might become stabilized in the soil. The study shows the role of cacao AFSs in mitigating greenhouse gas (GHG) emission through accumulation and retention of high amounts of organic C in the soils and suggests the potential benefit of this environmental service to the nearly 6 million cacao farmers worldwide.
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format |
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topic_facet |
THEOBROMA CACAO ERYTHRINA PLANTACION PLANTAS DE SOMBRA AGROFORESTERIA BIOMASA MATERIA ORGANICA DEL SUELO GASES DE EFECTO INVERNADERO CONTROL DE LA CONTAMINACION |
author |
70040 Gama Rodrigues, E.F. 108508 Ramachandran Nair, P.K. 98330 Nair, V.D. 70039 Gama Rodrigues, A.C. 45958 Baligar, V.C. 89073 Machado, R.C.R. autores/as |
author_facet |
70040 Gama Rodrigues, E.F. 108508 Ramachandran Nair, P.K. 98330 Nair, V.D. 70039 Gama Rodrigues, A.C. 45958 Baligar, V.C. 89073 Machado, R.C.R. autores/as |
author_sort |
70040 Gama Rodrigues, E.F. |
title |
Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
title_short |
Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
title_full |
Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
title_fullStr |
Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
title_full_unstemmed |
Carbon storage in soil size fractions under two cacao agroforestry systems in Bahia, Brazil |
title_sort |
carbon storage in soil size fractions under two cacao agroforestry systems in bahia, brazil |
publisher |
Amsterdam (Países Bajos): Springer, |
publishDate |
2010 |
url |
https://doi.org/10.1007/s00267-009-9420-7 |
work_keys_str_mv |
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1756065090757459968 |