Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues
In tropical cropping systems with few external imputs, efficient management of mineral N derived from added organic residues is essential for the proper functioning of the system. We studied the dynamics of mineral Nitroden (N) in the top 100 cm of soil with a system tensiometers and suction cups af...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
1998
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| Online Access: | https://hdl.handle.net/10568/100983 |
| _version_ | 1855535117012828160 |
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| author | Vanlauwe, Bernard Diels, J. Duchateau, L. Sanginga, N. Merckx, Roel |
| author_browse | Diels, J. Duchateau, L. Merckx, Roel Sanginga, N. Vanlauwe, Bernard |
| author_facet | Vanlauwe, Bernard Diels, J. Duchateau, L. Sanginga, N. Merckx, Roel |
| author_sort | Vanlauwe, Bernard |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | In tropical cropping systems with few external imputs, efficient management of mineral N derived from added organic residues is essential for the proper functioning of the system. We studied the dynamics of mineral Nitroden (N) in the top 100 cm of soil with a system tensiometers and suction cups after applying 15N-labelled Leucaena Leucocephala and Dactyladenia bacteria residues to bare and cropped microplots installed in the respective alley cropping systems, and folloed the fate of the N for two maize-cowpea rotations (1992 and 1993).
Fifty days after applying the residues (DAA), 20% of the added residue N was found in the soil profile of the bare Leucaena treatment and 5% under Dactyladenia, compared with 5% and 1%, respectively, where cropped. All values decreased to about 1% after 505 days. In the cropped soil, no mineral N derived from the residues was lost by leaching during the first 6 weeks.
As the maize grew, the soil profile was gradually depleted of nitrate to near zero in the Dactyladenia treatment, whereas during the cowpea season the amount of nitrate N increased to 36 kg N ha-1 for the Leucaena treatment, and 26 kg N ha-1 for the Dactyladenia treatment. The soil of the bare microplots contained substantially more nitrate N (98 and 47 kg N ha-1 during the first year on average, under Luecaena and Dactyladenia, respectively) than that of the cropped microplots, except during 1993 cowpea season. Nitrate residing in the subsoil (80-100 cm) in the bare treatmentwas not readily leached to deeper soil. The risk of losses of native mineral N was greater during the first 50 DAA and to a lesser extent during the cowpea seasons. Improved management of the hedgerows could increase the potential of the hedgerow trees to recycle mineral N. |
| format | Journal Article |
| id | CGSpace100983 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1998 |
| publishDateRange | 1998 |
| publishDateSort | 1998 |
| record_format | dspace |
| spelling | CGSpace1009832024-03-06T10:16:43Z Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues Vanlauwe, Bernard Diels, J. Duchateau, L. Sanginga, N. Merckx, Roel cropping systems residues bacteria soil profiles maize cowpeas soil In tropical cropping systems with few external imputs, efficient management of mineral N derived from added organic residues is essential for the proper functioning of the system. We studied the dynamics of mineral Nitroden (N) in the top 100 cm of soil with a system tensiometers and suction cups after applying 15N-labelled Leucaena Leucocephala and Dactyladenia bacteria residues to bare and cropped microplots installed in the respective alley cropping systems, and folloed the fate of the N for two maize-cowpea rotations (1992 and 1993). Fifty days after applying the residues (DAA), 20% of the added residue N was found in the soil profile of the bare Leucaena treatment and 5% under Dactyladenia, compared with 5% and 1%, respectively, where cropped. All values decreased to about 1% after 505 days. In the cropped soil, no mineral N derived from the residues was lost by leaching during the first 6 weeks. As the maize grew, the soil profile was gradually depleted of nitrate to near zero in the Dactyladenia treatment, whereas during the cowpea season the amount of nitrate N increased to 36 kg N ha-1 for the Leucaena treatment, and 26 kg N ha-1 for the Dactyladenia treatment. The soil of the bare microplots contained substantially more nitrate N (98 and 47 kg N ha-1 during the first year on average, under Luecaena and Dactyladenia, respectively) than that of the cropped microplots, except during 1993 cowpea season. Nitrate residing in the subsoil (80-100 cm) in the bare treatmentwas not readily leached to deeper soil. The risk of losses of native mineral N was greater during the first 50 DAA and to a lesser extent during the cowpea seasons. Improved management of the hedgerows could increase the potential of the hedgerow trees to recycle mineral N. 1998 2019-04-24T12:29:41Z 2019-04-24T12:29:41Z Journal Article https://hdl.handle.net/10568/100983 en Limited Access Vanlauwe, B., Diels, J., Duchateau, L., Sanginga, N. & Merckx, R. (1998). Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15N-labelled leaf residues. European Journal of Soil Science, 49, 417-425. |
| spellingShingle | cropping systems residues bacteria soil profiles maize cowpeas soil Vanlauwe, Bernard Diels, J. Duchateau, L. Sanginga, N. Merckx, Roel Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title | Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title_full | Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title_fullStr | Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title_full_unstemmed | Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title_short | Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of 15Nlabelled leaf residues |
| title_sort | mineral n dynamics in bare and cropped leucaena leucocephala and dactyladenia barteri alley cropping systems after the addition of 15nlabelled leaf residues |
| topic | cropping systems residues bacteria soil profiles maize cowpeas soil |
| url | https://hdl.handle.net/10568/100983 |
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