Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil
The effect of land use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon managemen...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
1998
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/43628 |
| _version_ | 1855523687428521984 |
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| 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 effect of land use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can be used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuous cropping systems studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems. |
| format | Journal Article |
| id | CGSpace43628 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1998 |
| publishDateRange | 1998 |
| publishDateSort | 1998 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace436282024-08-27T10:35:49Z Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. feed crops land use mineralization nitrogen availability oxisols nitrogen management index utilización de la tierra mineralización disponibilidad de nutrientes nitrógeno ferralsoles The effect of land use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can be used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuous cropping systems studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems. 1998-09-18 2014-09-24T08:42:25Z 2014-09-24T08:42:25Z Journal Article https://hdl.handle.net/10568/43628 en Limited Access Springer |
| spellingShingle | feed crops land use mineralization nitrogen availability oxisols nitrogen management index utilización de la tierra mineralización disponibilidad de nutrientes nitrógeno ferralsoles Westerhof, R Vilela, Lourival Ayarza, Miguel Angel Zech, W. Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title | Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title_full | Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title_fullStr | Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title_full_unstemmed | Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title_short | Land use effects on labile N extracted with permanganate and the nitrogen management index in the Cerrado region of Brazil |
| title_sort | land use effects on labile n extracted with permanganate and the nitrogen management index in the cerrado region of brazil |
| topic | feed crops land use mineralization nitrogen availability oxisols nitrogen management index utilización de la tierra mineralización disponibilidad de nutrientes nitrógeno ferralsoles |
| url | https://hdl.handle.net/10568/43628 |
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