Temporal changes in microbial biomass and N mineralization under simulated field cultivation

Grace P.R., Macrae I.C. and Myers R.J.K. (1993) Temporal changes in microbial biomass and N mineralization under simulated field cultivation. Soil Biology and Biochemistry, 25 12: 1745-1753. doi:10.1016/0038-0717(93)90179-F


Author Grace P.R.
Macrae I.C.
Myers R.J.K.
Title Temporal changes in microbial biomass and N mineralization under simulated field cultivation
Journal name Soil Biology and Biochemistry   Check publisher's open access policy
ISSN 0038-0717
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1016/0038-0717(93)90179-F
Open Access Status Not yet assessed
Volume 25
Issue 12
Start page 1745
End page 1753
Total pages 9
Language eng
Subject 2404 Microbiology
1111 Soil Science
Abstract Intact soil cores from a perennial pasture were incubated under controlled environment conditions to examine the effect of simulated cultivation on microbial biomass C and N and associated nitrogenous products. Microbial biomass C increased by an average of 34% to 3184 μg C g soil during the first 17 days after addition of a glucose-sodium acetate-(NH)SO solution, but was not affected by cultivation. Microbial biomass N (average 343 μg N g soil) was not affected by either amendment or cultivation treatments. Cultivation promoted the oxidation of recently-synthesized microbial metabolites and enhanced substrate depletion, with an additional 16 μg NO-N g soil (equivalent to 0.5% of total organic N) being produced in the 105 days following disturbance. A 36% reduction in potentially mineralizable N in the disturbed vs undisturbed treatments suggests the rapid depletion of the labile organic component on cultivation may retard the subsequent decomposition of more resistant organic material.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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