Carbon dynamics after five decades of different crop residue management in temperate climate

• DOI: 10.5194/egusphere-2022-1497
• Publication Date: 2023-01-11T11:53:52Z
• Authors: Ilaria Piccoli; Felice Sartori; Riccardo Polese; Antonio Berti
• Keywords: Crop Residue; Residue (chemistry); Soil carbon; Stock (firearms); Manure management

Abstract. Increasing soil organic carbon (SOC) in agricultural soils is nowadays receiving growing attention also due to the COP21 initiative of “4 per 1000”. In this study, effect five decades different residue management (residue removal, incorporation, and incorporation + poultry manure) was investigated on SOC stock related 4 1000 C saturation concepts. Preliminary results showed that higher 0–60 cm found after 54 years experiment when residues were incorporated into compared removal (75.0 vs 69.0 t ha−1) while manure had a negligible effect. Comparing 0–30 with pre-existent data series, general decreasing trend observed from start 1966 up 1986, being greater residual (−8.6 than (−4.8 ha−1, irrespective addition). 2020, difference between above-mentioned systems 4.1 ha−1 corresponding 2.2 ‰ which lower what suggested by initiative. This attributed retention arose response 141 resulting 0.1 % yearly conversion rate sensibly generally reported literature. Therefore, an alternative use (e.g., bioenergy production) at least part crop conceivable temperate climate for more efficient cycle. The studied demonstrated be far saturation, 30−47 degree range. specific studies how both inorganic (i.e., carbonates) fractions aggregates aggregate mineralization are namely requested.