Decomposition of 14C-and 15N-labelled microbial cells in soil

Creators Marumoto Takuya

Creators Anderson J. P. E.

Creators Domsch K. H.

Three 14C- and 15N-labelled eukaryotic (fungal) species, 2 prokaryotic species or their mixture (eukaryotic to prokaryotic cells = 8:2), were grown in vitro, dried, ground and added to parabrown earth and chernozem soils, respectively. Mean percent of 14C decomposition of labelled microorganisms obtained after 10 days was 43 + or - 6.3% for parabrown earth and 34 + or - 4.0% for chernozem soil. About 50% of the C in the dead microorganisms was mineralized during the first 28 days of incubation. About 76% of the flush of soil organic N mineralization within 28 days, caused by the drying-rewetting treatment, was derived from dead microbial biomass in soil. About 33% of the added dead microbial-15N was mineralized in parabrown earth soil during 28 days of incubation and c.37% of newly immobilized 15N during the decomposition of added microorganisms was mineralized during the 28 days following a drying-rewetting treatment.

[ISSN]0038-0717

[NCID]AA00844212

https://doi.org/10.1016/0038-0717(82)90105-5

[isVersionOf] [URI]http://www.sciencedirect.com/science/journal/00380717