Model organic compounds differ in priming effects on alkalinity release in soils through carbon and nitrogen mineralisation
F Rukshana, CR Butterly, JA Baldock, JM Xu, C Tang
SOIL BIOLOGY & BIOCHEMISTRY | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2012
The influence of organic matter and its cycling on soil pH change is still unclear. This study investigated the effect of organic compounds on carbon and nitrogen dynamics and their relationship with pH changes in two soils differing in initial soil pH (Podosol of pH 4.5 and Tenosol of pH 6.2). Seven organic compounds representing common compounds in decomposing plant residues or root exudates were added to the soils and incubated for 60 d. The largest cumulative soil respiration occurred when glucose, malic acid and citric acid were added. In addition, the Tenosol had the greater respiration compared to the Podosol. The addition of organic acids (acetic, malic, citric, ferulic and benzoic a..View full abstract
Awarded by Australian Research Council
Awarded by National Basic Research Program of China
This research was supported under the Australian Research Council's Discovery Projects funding scheme (project DP0877882). JMX was also supported by the National Basic Research Program of China (2011CB100502). We thank Dr Gary Clark and anonymous reviewers for their valuable comments.