Humate Combined with Film-Mulched Ridge-Furrow Tillage Improved Carbon Sequestration in Arid Fluvo-Aquic Soil

Commercial humic fertilizers (humates) can be used to improve carbon sequestration. In this study, a 3-year field trial (2016–2018) employed four treatments investigate the mechanism by which humate increases sequestration in fluvo-aquic soils: (1) blank: bare soil with no agricultural treatment; (2) control: standard film mulch (FM) ridge-furrow tillage (which acts as CK); (3) humate: FM plus humate; and (4) straw: straw. The three strongly affected sequestration, straw more significant than blank treatment. Moreover, ≥2.0-mm macroaggregate fraction, >1-mm aggregate-associated carbon, weight mean diameter (MWD) geometric (GMD), microbial biomass nitrogen (MBN) values for were all significantly increased (p < 0.05), increasing 1.9 0.9 Mg C ha−1y−1 compared control, respectively. Carbon was associated >1.0-mm C, MWD, GMD, MBN, organic input. Humate synergistically regulate processes greatly increase return while efficiently fraction stability, macroaggregate-associated physical protection of aggregates, thereby Therefore, may novel economical alternative dry soils.