Labile carbon input determines the direction and magnitude of the priming effect

XJA Liu, J Sun, RL Mau, BK Finley, ZG Compson… - Applied Soil …, 2017 - Elsevier
Labile carbon (C) input to soil can accelerate or slow the decomposition of soil organic
matter, a phenomenon called priming. However, priming is difficult to predict, making its
relationship with C input elusive. To assess this relationship, we added 13 C-glucose at five
levels (8 to 1606 μg C g− 1 week− 1) to the soil from four different ecosystems for seven
weeks. We observed a positive linear relationship between C input and priming in all soils:
priming increased from negative or no priming at low C input to strong positive priming at …

Labile carbon input determines the direction and magnitude of the priming effect.

XJA Liu XiaoJun [Liu, SJR Sun JingRan, RL Mau… - 2017 - cabidigitallibrary.org
Labile carbon (C) input to soil can accelerate or slow the decomposition of soil organic
matter, a phenomenon called priming. However, priming is difficult to predict, making its
relationship with C input elusive. To assess this relationship, we added 13C-glucose at five
levels (8 to 1606 µg C g-1 week-1) to the soil from four different ecosystems for seven
weeks. We observed a positive linear relationship between C input and priming in all soils:
priming increased from negative or no priming at low C input to strong positive priming at …
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