Soil aggregate stabilization and carbon sequestration: Feedbacks through organomineral associations

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:464188

Jastrow, J D; Miller, R M

Primary production (specifically, the rate and quality of C transfer below ground) and soil microbial activity (specifically, the rates of C transformation and decay) are recognized as the overall biological processes governing soil organic C (SOC) dynamics. These two processes and, hence, SOC cycling and storage are controlled by complex underlying biotic and abiotic interactions and feedbacks, most of which can be tied in one way or another to the influences of the five state factors related to soil formation, and many of which are sensitive to management practices. Overall, C input rates and quality are largely dependent on climate (especially temperature and precipitation), vegetation type and landscape, soil type, and management practices. Decomposition processes and turnover rates, however, are greatly influenced by climate, the type and quality of organic matter (e.g., N content and the ratios of C:N and lignin:N), chemical or physicochemical associations of organic matter (OM) with soil mineral components, and the location of OM within the soil.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 464188
• Report Number(s): ANL/ER/CP--88020; CONF-9607182--1; ON: DE97004096
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BIODEGRADATION
CARBON CYCLE
CARBON SOURCES
DECOMPOSITION
MINERALS
ORGANIC COMPOUNDS
SOIL CHEMISTRY
SOILS