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<p>To obtain a more comprehensive perspective of carbon dynamics in coffee production, we studied carbon pools in litter and soil, as well as their interactions under contrasting management and variable annual precipitation, assessing their influence on soil carbon dynamics. We examined litter production and decomposition rates in two co-occurring plant species, <i>Coffea arabica</i> and <i>Ocotea insularis</i>, within a Costa Rican coffee production system. Comparisons were made between a full-sun monoculture coffee system (FSS) and an incipient agroforestry system (AFS) for two years with contrasting climate variability phases of El Niño-Southern Oscillation (ENSO) mode. Soil carbon stocks were quantified in both systems. Results showed greater soil carbon stocks in the FSS compared with the AFS. This result is shaped by factors such as land-use history, system age, soil type, shade tree species, and organic matter/litter input quantity and quality. Additionally, seasonal rainfall patterns impacted organic matter decomposition, with faster rates observed during the rainy season as compared with the dry season. The findings highlight the influence of rainfall variability on the characteristics and dynamics of soil carbon at sub-seasonal to interannual scales. This underscores the importance of advancing research into carbon stock analysis in dynamic systems experiencing variable rainfall patterns.</p>

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Litter Dynamics and Soil Carbon Stock in a Coffee Agroforestry System in Costa Rica

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • M. Monge-Muñoz,
  • G. Soto-Muñoz,
  • J. Chin-Pampillo,
  • A.M. Durán-Quesada,
  • M.V. Gutiérrez-Soto,
  • M. Orozco-Aceves,
  • C. Chinchilla-Soto

摘要

To obtain a more comprehensive perspective of carbon dynamics in coffee production, we studied carbon pools in litter and soil, as well as their interactions under contrasting management and variable annual precipitation, assessing their influence on soil carbon dynamics. We examined litter production and decomposition rates in two co-occurring plant species, Coffea arabica and Ocotea insularis, within a Costa Rican coffee production system. Comparisons were made between a full-sun monoculture coffee system (FSS) and an incipient agroforestry system (AFS) for two years with contrasting climate variability phases of El Niño-Southern Oscillation (ENSO) mode. Soil carbon stocks were quantified in both systems. Results showed greater soil carbon stocks in the FSS compared with the AFS. This result is shaped by factors such as land-use history, system age, soil type, shade tree species, and organic matter/litter input quantity and quality. Additionally, seasonal rainfall patterns impacted organic matter decomposition, with faster rates observed during the rainy season as compared with the dry season. The findings highlight the influence of rainfall variability on the characteristics and dynamics of soil carbon at sub-seasonal to interannual scales. This underscores the importance of advancing research into carbon stock analysis in dynamic systems experiencing variable rainfall patterns.