Optimizing soil nitrogen balance in a potato cropping system through legume intercropping
Negative nitrogen balance represents a major factor causing low potato yield in potato growing areas of Kenya while its excessive surplus poses a significant environmental concern. In order to synchronize this tradeoff, a field trial integrating potato (Solanum tuberosum L.) with lima bean (Phaseolu...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Springer
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/107902 |
| _version_ | 1855533724663283712 |
|---|---|
| author | Nyawade, S. Karanja, N. Gachene, C.K.K. Gitari, H.I. Schulte-Geldermann, Elmar Parker, M. |
| author_browse | Gachene, C.K.K. Gitari, H.I. Karanja, N. Nyawade, S. Parker, M. Schulte-Geldermann, Elmar |
| author_facet | Nyawade, S. Karanja, N. Gachene, C.K.K. Gitari, H.I. Schulte-Geldermann, Elmar Parker, M. |
| author_sort | Nyawade, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Negative nitrogen balance represents a major factor causing low potato yield in potato growing areas of Kenya while its excessive surplus poses a significant environmental concern. In order to synchronize this tradeoff, a field trial integrating potato (Solanum tuberosum L.) with lima bean (Phaseolus lunatus L.) and dolichos (Lablab purpureus L.) in intercropping system was conducted in the upper midland [1552 m above sea level (masl), lower highland (1894 masl) and upper highland (2552 masl)] agro-ecological zones of Kenya. Nitrogen gains from mineralization, fertilization, biological fixation, and outputs from biomass accumulation, leaching, volatilization and soil erosion were quantified using standard procedures. Soil N balance ranged from − 10.7 to − 18.1 kg N ha−1 for sole potato, 4.1 to 6.6 kg N ha−1 for intercropping and 2.9 to 22.3 kg N ha−1 for sole legumes. The intermediate range of polyphenol and lignin contents in intercropping enhanced N mineralization with peak N release of 8 to 9 kg N ha−1 matching with peak N uptake by potato (19.9 to 31.2 kg N ha−1). Nitrate was leached below the active root zone in sole potato cropping (4.2 to 46.6 kg N ha−1), a process that was diverged by the deep root systems of legume intercrops. These results suggest that legume intercropping can provide a means of balancing the nitrogen retained in the biomass and soil, thus offering a mechanism for optimizing the soil N balance in smallholder potato farming systems |
| format | Journal Article |
| id | CGSpace107902 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1079022025-11-29T05:22:20Z Optimizing soil nitrogen balance in a potato cropping system through legume intercropping Nyawade, S. Karanja, N. Gachene, C.K.K. Gitari, H.I. Schulte-Geldermann, Elmar Parker, M. potatoes intercropping legumes cropping systems Negative nitrogen balance represents a major factor causing low potato yield in potato growing areas of Kenya while its excessive surplus poses a significant environmental concern. In order to synchronize this tradeoff, a field trial integrating potato (Solanum tuberosum L.) with lima bean (Phaseolus lunatus L.) and dolichos (Lablab purpureus L.) in intercropping system was conducted in the upper midland [1552 m above sea level (masl), lower highland (1894 masl) and upper highland (2552 masl)] agro-ecological zones of Kenya. Nitrogen gains from mineralization, fertilization, biological fixation, and outputs from biomass accumulation, leaching, volatilization and soil erosion were quantified using standard procedures. Soil N balance ranged from − 10.7 to − 18.1 kg N ha−1 for sole potato, 4.1 to 6.6 kg N ha−1 for intercropping and 2.9 to 22.3 kg N ha−1 for sole legumes. The intermediate range of polyphenol and lignin contents in intercropping enhanced N mineralization with peak N release of 8 to 9 kg N ha−1 matching with peak N uptake by potato (19.9 to 31.2 kg N ha−1). Nitrate was leached below the active root zone in sole potato cropping (4.2 to 46.6 kg N ha−1), a process that was diverged by the deep root systems of legume intercrops. These results suggest that legume intercropping can provide a means of balancing the nitrogen retained in the biomass and soil, thus offering a mechanism for optimizing the soil N balance in smallholder potato farming systems 2020-03-12 2020-03-30T16:53:25Z 2020-03-30T16:53:25Z Journal Article https://hdl.handle.net/10568/107902 en Open Access Springer Nyawade, S.S.; Karanja, N.N.; Gachene, C.K.K.; Gitari, H.I.; Schulte-Geldermann, E.; Parker, M. 2020. Optimizing soil nitrogen balance in a potato cropping system through legume intercropping. Nutrient Cycling in Agroecosystems. ISSN 1573-0867. Published online 12Mar2020. 17 p. |
| spellingShingle | potatoes intercropping legumes cropping systems Nyawade, S. Karanja, N. Gachene, C.K.K. Gitari, H.I. Schulte-Geldermann, Elmar Parker, M. Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title | Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title_full | Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title_fullStr | Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title_full_unstemmed | Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title_short | Optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| title_sort | optimizing soil nitrogen balance in a potato cropping system through legume intercropping |
| topic | potatoes intercropping legumes cropping systems |
| url | https://hdl.handle.net/10568/107902 |
| work_keys_str_mv | AT nyawades optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping AT karanjan optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping AT gacheneckk optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping AT gitarihi optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping AT schultegeldermannelmar optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping AT parkerm optimizingsoilnitrogenbalanceinapotatocroppingsystemthroughlegumeintercropping |