Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions
The integration of multipurpose legumes into low-input tropical agricultural systems is needed because they are a nitrogen (N) input through symbiotic fixation. The drought-tolerant cover legume canavalia (Canavalia brasiliensis) has been introduced for use either as forage or as a green manure into...
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2011
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/43894 |
| _version_ | 1855541533779951616 |
|---|---|
| author | Douxchamps, Sabine Frossard, Emmanuel Bernasconi, S Hoek, Rein van der Schmidt, A. Rao, Idupulapati M. Oberson, Astrid |
| author_browse | Bernasconi, S Douxchamps, Sabine Frossard, Emmanuel Hoek, Rein van der Oberson, Astrid Rao, Idupulapati M. Schmidt, A. |
| author_facet | Douxchamps, Sabine Frossard, Emmanuel Bernasconi, S Hoek, Rein van der Schmidt, A. Rao, Idupulapati M. Oberson, Astrid |
| author_sort | Douxchamps, Sabine |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The integration of multipurpose legumes into low-input tropical agricultural systems is needed because they are a nitrogen (N) input through symbiotic fixation. The drought-tolerant cover legume canavalia (Canavalia brasiliensis) has been introduced for use either as forage or as a green manure into the crop-livestock system of the Nicaraguan hillsides. To evaluate its impact on the subsequent maize crop, an in-depth study on N dynamics in the soil-plant system was conducted. Microplots were installed in a 6-year old field experiment with maize-canavalia rotation. Direct and indirect 15N-labelling techniques were used to determine N uptake by maize from canavalia residues and canavalia-fed cows manure compared to mineral fertilizer. Litter bags were used to determine the N release from canavalia residues. The incorporation of N from the amendment into different soil N pools (total N, mineral N, microbial biomass) was followed during the maize cropping season. Maize took up an average of 13.3 g?N?m?2, within which 1.0 g?N?m?2 was from canavalia residues and 2.6 g?N?m?2 was from mineral fertilizer, corresponding to an amendment N recovery of 12% and 32%, respectively. Recoveries in maize would probably be higher at a site with lower soil available N content. Most of the amendment N remained in the soil. Mineral N and microbial N were composed mainly of N derived from the soil. Combined total 15N recovery in maize and soil at harvest was highest for the canavalia residue treatment with 98% recovery, followed by the mineral fertilizer treatment with 83% recovery. Despite similar initial enrichment of soil microbial and mineral N pools, the indirect labelling technique failed to assess the N fertilizer value of mineral and organic amendments due to a high N mineralization from the soil organic matter. |
| format | Journal Article |
| id | CGSpace43894 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace438942024-08-27T10:37:17Z Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions Douxchamps, Sabine Frossard, Emmanuel Bernasconi, S Hoek, Rein van der Schmidt, A. Rao, Idupulapati M. Oberson, Astrid feed crops canavalia nitrogen fixation organic amendments animal feeding isotopes nitrogen maize fijación del nitrógeno plantas forrajeras enmiendas organicas alimentación de los animales isótopos nitrógeno maíz The integration of multipurpose legumes into low-input tropical agricultural systems is needed because they are a nitrogen (N) input through symbiotic fixation. The drought-tolerant cover legume canavalia (Canavalia brasiliensis) has been introduced for use either as forage or as a green manure into the crop-livestock system of the Nicaraguan hillsides. To evaluate its impact on the subsequent maize crop, an in-depth study on N dynamics in the soil-plant system was conducted. Microplots were installed in a 6-year old field experiment with maize-canavalia rotation. Direct and indirect 15N-labelling techniques were used to determine N uptake by maize from canavalia residues and canavalia-fed cows manure compared to mineral fertilizer. Litter bags were used to determine the N release from canavalia residues. The incorporation of N from the amendment into different soil N pools (total N, mineral N, microbial biomass) was followed during the maize cropping season. Maize took up an average of 13.3 g?N?m?2, within which 1.0 g?N?m?2 was from canavalia residues and 2.6 g?N?m?2 was from mineral fertilizer, corresponding to an amendment N recovery of 12% and 32%, respectively. Recoveries in maize would probably be higher at a site with lower soil available N content. Most of the amendment N remained in the soil. Mineral N and microbial N were composed mainly of N derived from the soil. Combined total 15N recovery in maize and soil at harvest was highest for the canavalia residue treatment with 98% recovery, followed by the mineral fertilizer treatment with 83% recovery. Despite similar initial enrichment of soil microbial and mineral N pools, the indirect labelling technique failed to assess the N fertilizer value of mineral and organic amendments due to a high N mineralization from the soil organic matter. 2011-04 2014-10-02T08:32:54Z 2014-10-02T08:32:54Z Journal Article https://hdl.handle.net/10568/43894 en Limited Access Springer |
| spellingShingle | feed crops canavalia nitrogen fixation organic amendments animal feeding isotopes nitrogen maize fijación del nitrógeno plantas forrajeras enmiendas organicas alimentación de los animales isótopos nitrógeno maíz Douxchamps, Sabine Frossard, Emmanuel Bernasconi, S Hoek, Rein van der Schmidt, A. Rao, Idupulapati M. Oberson, Astrid Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title | Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title_full | Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title_fullStr | Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title_full_unstemmed | Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title_short | Nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| title_sort | nitrogen recoveries from organic amendments in crop and soil assessed by isotope techniques under tropical field conditions |
| topic | feed crops canavalia nitrogen fixation organic amendments animal feeding isotopes nitrogen maize fijación del nitrógeno plantas forrajeras enmiendas organicas alimentación de los animales isótopos nitrógeno maíz |
| url | https://hdl.handle.net/10568/43894 |
| work_keys_str_mv | AT douxchampssabine nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT frossardemmanuel nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT bernasconis nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT hoekreinvander nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT schmidta nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT raoidupulapatim nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions AT obersonastrid nitrogenrecoveriesfromorganicamendmentsincropandsoilassessedbyisotopetechniquesundertropicalfieldconditions |