Characterization labile and stable nitrogen
The permanganate oxidation procedure is easily performed and may help monitor large areas for their soil organic matter (SOM) quality and nitrogen (N) availability. Knowledge of the chemical characteristics of fractions that are lost or remain after oxidation will help explain results obtained by th...
| Main Authors: | , , , |
|---|---|
| Format: | Book Chapter |
| Language: | Inglés |
| Published: |
International Center for Tropical Agriculture
1999
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/55134 |
| _version_ | 1855531356133523456 |
|---|---|
| author | Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. |
| author_browse | Ayarza, Miguel Angel Vilela, Lourival Westerhof, R Zech, W. |
| author_facet | Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. |
| author_sort | Westerhof, R |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The permanganate oxidation procedure is easily performed and may help monitor large areas for their soil organic matter (SOM) quality and nitrogen (N) availability. Knowledge of the chemical characteristics of fractions that are lost or remain after oxidation will help explain results obtained by this method. We found that amino acid N contributed 22.7% to the permanganate-extractable N fraction (PEN) and amino sugar N 9. 1 %, but the remaining 68.2% of the PEN was of "unknown" N. Stable N had lower amounts of amino acid N (15.5%) and amino sugar N (6.2%). Permanganate-extractable N and stable N may be spatially separated, that is, PEN is found outside microaggregates, whereas stable N is inside, where it is protected from permanganate extraction and probably also from microbial breakdown. Together with physically protected N, the stable N fraction also contained an important amount of chemically recalcitrant, not-extractable, "unknown" N with a chemical composition that is hypothesized to be different from that of the permanganate-extractable "unknown" N. |
| format | Book Chapter |
| id | CGSpace55134 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace551342024-01-17T12:58:34Z Characterization labile and stable nitrogen Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. land use mineralization nitrogen content oxisols utilización de la tierra mineralización contenido de nitrógeno oxisoles The permanganate oxidation procedure is easily performed and may help monitor large areas for their soil organic matter (SOM) quality and nitrogen (N) availability. Knowledge of the chemical characteristics of fractions that are lost or remain after oxidation will help explain results obtained by this method. We found that amino acid N contributed 22.7% to the permanganate-extractable N fraction (PEN) and amino sugar N 9. 1 %, but the remaining 68.2% of the PEN was of "unknown" N. Stable N had lower amounts of amino acid N (15.5%) and amino sugar N (6.2%). Permanganate-extractable N and stable N may be spatially separated, that is, PEN is found outside microaggregates, whereas stable N is inside, where it is protected from permanganate extraction and probably also from microbial breakdown. Together with physically protected N, the stable N fraction also contained an important amount of chemically recalcitrant, not-extractable, "unknown" N with a chemical composition that is hypothesized to be different from that of the permanganate-extractable "unknown" N. 1999 2015-01-28T14:17:28Z 2015-01-28T14:17:28Z Book Chapter https://hdl.handle.net/10568/55134 en Open Access International Center for Tropical Agriculture Westerhof, Roelof; Vilela, Lourival; Ayarza, Miguel Angel; Zech, Wolfgang. 1999. Characterization labile and stable nitrogen. In: Thomas, Richard J.; Ayarza, Miguel Angel (eds.). Sustainable land management for the oxisols of the Latin American savannas: Dynamics of soil organic matter and indicators of soil quality. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 133-140. (CIAT publication no. 312) |
| spellingShingle | land use mineralization nitrogen content oxisols utilización de la tierra mineralización contenido de nitrógeno oxisoles Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. Characterization labile and stable nitrogen |
| title | Characterization labile and stable nitrogen |
| title_full | Characterization labile and stable nitrogen |
| title_fullStr | Characterization labile and stable nitrogen |
| title_full_unstemmed | Characterization labile and stable nitrogen |
| title_short | Characterization labile and stable nitrogen |
| title_sort | characterization labile and stable nitrogen |
| topic | land use mineralization nitrogen content oxisols utilización de la tierra mineralización contenido de nitrógeno oxisoles |
| url | https://hdl.handle.net/10568/55134 |
| work_keys_str_mv | AT westerhofr characterizationlabileandstablenitrogen AT vilelalourival characterizationlabileandstablenitrogen AT ayarzamiguelangel characterizationlabileandstablenitrogen AT zechw characterizationlabileandstablenitrogen |