Determination of microbial biomass and nitrogen mineralization following rewetting of dried soil

被引：0
|
作者：
Franzluebbers, A.J. [1 ]
Haney, R.L. [1 ]
Hons, F.M. [1 ]
Zuberer, D.A. [1 ]
机构：
[1] USDA-ARS, Watkinsville, United States
来源：
| 1996年 / Soil Science Soc of America, Madison, WI, United States卷 / 60期
关键词：
Agriculture - Biochemistry - Biomass - Carbon - Fumigation - Microorganisms - Nitrogen - Soil testing;
D O I：
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摘要：
The objective of the paper is to determine the optimum preincubation time after rewetting of dried soil for estimating soil microbial biomass (SMB) and to identify a quick, reliable biochemical predictor of soil N mineralization potential. Biochemical determinations of SMB were screened on a Weswood silty clay loam (fine, mixed, thermic Fluventic Ustochrept) having five levels of soil organic C as a result of long-term management. Biochemical determinations included arginine ammonification, substrate-induced respiration, cumulative C and net N mineralization, and SMBC using the chloroform fumigation-incubation (CFI) method. The CO2-C evolved during the first day after rewetting of dried soil is recommended for rapid estimation of SMBC and potential N mineralization because of its simplicity and precision.
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