Contrasting temperature responses of dissolved organic carbon and phenols leached from soils.

ABSTRACT:

Background and aims

Plant-derived phenols are a major input to the terrestrial carbon cycle that might be expected to contribute substantially to dissolved organic carbon (DOC) losses from soils. This study investigated changes in DOC and phenols in leachates from soil treated with individual plant litter types under seasonal temperature change.

Methods

Senescing grass, buttercup, ash and oak litters were applied to soil lysimeters. Leachates were collected over 22 months and analysed for DOC and phenols. Phenols in litter and DOC were analysed using on-line thermally assisted hydrolysis and methylation with tetramethylammonium hydroxide (TMAH).

Results

Mass loss differed between litter type (buttercup>ash>grass>oak). Phenol concentrations in the senescing litters (<2

SUBMITTER: Williams JS 

PROVIDER: S-EPMC4750429 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature