Measurements of Microbial Biomass C and N in Paddy Soils by the Fumigation-Extraction Method

Autor:	Kazuyuki Inubushi, Fujiyoshi Shibahara
Rok vydání:	1995
Předmět:	chemistry.chemical_classification Chemistry Soil biology Fumigation Soil Science chemistry.chemical_element Plant Science engineering.material Nitrogen Andosol Agronomy Soil water engineering Organic matter Fertilizer Gleysol
Zdroj:	Soil Science and Plant Nutrition. 41:681-689
ISSN:	1747-0765 0038-0768
DOI:	10.1080/00380768.1995.10417018
Popis:	Twelve kinds of paddy soils with different applications of fertilizer or organic matter in three experimental fields (Gley soil, Gray Lowland soil and Brown Lowland soil) and two farmers’ fields (Gray Lowland soil and Wet Andosol) were collected before flooding. Measurements of the contents of carbon (C) and nitrogen (N) in the soil microbial biomass were carried out by the chloroform fumigation-extraction method, as compared with the adenosine triphosphate (ATP) method. Values of E C, K2SO4-extractable organic C after fumigation determined by dichrornate digestion, ranged from 84 to 662 mg C kg−1 dry soil, corresponding to 0.5-2.1% of soil organic C. E C values in Gley soils were lower than those in Gray Lowland soils and Brown Lowland soils* E C values measured by automated combustion oxidation showed a mean of 18.1% which was larger than that obtained by dichrornate digestion. Values of E N, K2SO4-extractable total N after fumigation, ranged from 13 to 40 mg N kg−1 dry soil, corresponding to 0...
Databáze:	OpenAIRE
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