Resource Legacies of Organic and Conventional Management Differentiate Soil Microbial Carbon Use.

ABSTRACT: Long-term contrasts in agricultural management can shift soil resource availability with potential consequences to microbial carbon (C) use efficiency (CUE) and the fate of C in soils. Isothermal calorimetry was combined with ¹³C-labeled glucose stable isotope probing (SIP) of 16S rRNA genes to test the hypothesis that organically managed soils would support microbial communities with greater thermodynamic efficiency compared to conventional soils due to a legacy of lower resource availability and a resultant shift toward communities supportive of more oligotrophic taxa. Resource availability was greater in conventionally managed soils, with 3.5 times higher available phosphorus, 5% more nitrate, and 36% more dissolved organic C. The two management systems harbored distinct gluc

SUBMITTER: Arcand MM 

PROVIDER: S-EPMC5711833 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature