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ARS Home » Research » Publications at this Location » Publication #142617
Title: IS K2SO4 EXTRACTION OF MICROBIAL CARBON PH DEPENDENT?

Author
item Haney, Richard
item Franzluebbers, Alan
item HONS, F - TEXAS A&M UNIVERSITY
item HOSSNER, L - TEXAS A&M UNIVERSITY
item ZUBERER, D - TEXAS A&M UNIVERSITY

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 10/25/2001
Publication Date: 10/25/2001
Citation: Haney, R.L., Franzluebbers, A.J., Hons, F.M., Hossner, L.R., Zuberer, D.A. 2001. Is k2so4 extraction of microbial carbon ph dependent?. American Society of Agronomy Meetings.

Interpretive Summary:

Technical Abstract: On average, K2SO4 extracts only 56% as much C as water below pH 7.7, but 23% more C above pH 7.7 in unfumigated soil. Soil microbial biomass estimates using CFE with 0.5 M K2SO4 were 70% lower than with water when soil pH<7.7, but 29% greater when soil pH>7.7. Soil pH and ionic strength of extractant interact, indicating that CFE for soil microbial biomass C is soil pH dependent.