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：

暂无

中图分类号：

学科分类号：

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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