Decrease of soil organic matter stabilization with increasing inputs: Mechanisms and controls

• Published in: Geoderma Vol. 304; pp. 76 - 82
• Main Authors: Shahbaz, Muhammad, Kuzyakov, Yakov, Heitkamp, Felix
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2017
• Subjects: aboveground biomass; carbon; carbon dioxide; Carbon sequestration; clay; cropland; leaves; microaggregates; mineralization; Priming effect; Root mineralisation; roots; silt; silt loam soils; Soil organic matter; straw; Straw residue; Water stable aggregates; wheat; Root mineralisation; Soil organic matter; Straw residue; Carbon sequestration; Priming effect; Water stable aggregates

Crop residue addition is a way to increase soil organic matter (SOM) level in croplands. However, organic matter input and SOM stocks are not linearly related. Consequently, adding high amounts of residues, such as straw, may increase SOM to only a small extent, and an alternative use of the residue...