Different forms of nitrogen in particle size fractions separated from two soils

Autor: M. Schnitzer, K. C. Ivarson
Rok vydání: 1982
Předmět:
Zdroj: Plant and Soil. 69:383-389
ISSN: 1573-5036
0032-079X
DOI: 10.1007/bf02372459
Popis: The possible use of particle size separation of soils in water was tested for preparing fractions rich in ‘unknown’-N, which constitutes between 41 and 46% of the total N. Ten particle size fractions ranging from 1,000.0 μm were separated from the A horizon of the Bainsville soil, an Orthic Humic Gleysol, and from the Bh horizon of the Armadale soil, a poorly drained Podzol. The distribution of N (hydrolyzable-, amino acid-, protein-, amino sugar-, ammonia-, ‘unknown’-and unidentified-N) in the initial soils and in each size fraction was determined. While particle size separation did not yield fractions which contained essentially only ‘unknown’-N and few known N-components, it was possible to isolate fractions which were either rich in amino acid-or protein-N or in NH3-N. In general, the finer size fractions tended to be enriched in amino acid-N while NH3-N was more prominent in the coarser fractions. The amino sugar-N content of all size fractions was low.
Databáze: OpenAIRE
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