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Enhancing Carbon Sequestration in Mediterranean Agroforestry Systems: A Review
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Orientador(es)
Resumo(s)
The agroforestry systems with a high potential for C sequestration are those degraded by
poor management strategies. Studies on changes in soil C status in these ecosystems mostly take
into account labile C pools. Labile and stable soil organic matter (SOM) fractions are affected by
soil management and land-use changes. Stable C pools are essential to understanding effects of
land-use on soil C storage in the long term. The SOM stability is partly enhanced by the interaction
of SOM with minerals and its inclusion into soil aggregates. Recalcitrant substances (e.g., lignin and
chitin) also contribute to the passive SOM fraction. Macroaggregates mostly reflect the influence of
plant roots and coarse intra-aggregate particulate SOM (POM), whereas microaggregates reflect the
influence of fine interaggregate POM, clay concentration and humified SOM fraction. Often, POM
is more sensitive to soil management changes than total SOM. Glomalin is a recalcitrant protein
consisting of chitin produced by mycorrhizal fungi to protect hyphae. Glomalin has implications
on C sequestration in agroforestry soils, but further research is needed before any prediction can be
made. One challenge is reducing the CO2 emission from roots, and increasing the recalcitrant root C
Descrição
Review
Palavras-chave
arbuscular mycorrhizal atmospheric CO2 mitigation concepts labile and stable soil organic matter land use soil aggregates
Contexto Educativo
Citação
Carranca, C.; Pedra, F.; Madeira, M. Enhancing Carbon Sequestration in Mediterranean Agroforestry Systems: A Review. Agriculture 2022, 12, 1598
Editora
MDPI