Labile, recalcitrant and stable soil organic carbon: comparison of agronomic management in a vineyard of Trentino (Italy)

The intensive exploitation of agricultural land has caused a depletion soil organic carbon (SOC) and decline in fertility, with consequent decrease the productivity agroecosystems, also contributing to atmospheric GHG emissions. ability storage (OC) depends on its persistence susceptibility decomposition. SOC is generally partitioned into fractions differing protection mechanisms turn decomposability. This study aimed compare OC pool repartition soils managed three different fertilization practices (mineral – CONV, manure ORGM green ORG-GM) during medium-term trial vineyard, order understand best solution increasing C sequestration. fractionation by acid hydrolysis allowed separating OC: labile, quickly mineralizable pool, recalcitrant slower turnover stable protected microbial attack. results showed that periodic application matrices (manure manure), although did not increase total OC, enriched along time readily available thus promoting release nutrients. Green been shown promote accumulation stabilized able improve structure and, therefore, fertility.