Greater accumulation of soil organic carbon after liquid dairy manure application under cereal-forage rotation than cereal monoculture

摘要: Abstract As opposed to the well-known positive effect of solid animal manure on soil organic carbon (SOC) stocks, liquid is less clear. In addition, few long-term studies have measured combined effects application and management practices such as tillage or inclusion perennial forages in annual cropping systems SOC stocks. The objective this paper was determine response stocks along a 0–50 cm profile 21 years dairy (LDM) compared mineral fertilizer combination with two fall primary (moldboard plowing vs. chisel plowing), crop rotations (cereal monoculture cereal-perennial forage rotation) silty clay at Normandin, Quebec, Canada. LDM were apparent only top 20 cm profile, overall higher fertilizer. magnitude LDM-induced change also dependent rotation, 15% greater accumulation 0–30 cm rotation than cereal monoculture. large retention C under could be explained by (1) slower decomposition resulting from lower frequency cereal-forage (every three years) (yearly operation), and/or (2) stabilization promoted presence high-quality labile litter (perennial legume) rotation. We conclude that changes can strongly modulated systems, may not just consequence characteristics.