Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars
Nitrogen (N) is one of the main nutrients that drive rice grain yield and is intensely managed especially in lowlands under irrigated conditions. A set of experiments was conducted in mid‐ and high‐altitude sites in Rwanda to investigate the response of five genotypes under different sowing dates an...
| Autores principales: | , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/109081 |
| _version_ | 1855538299077132288 |
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| author | Stuerz, S. Chuma, B.A. Cotter, M. Kalisa, A. Rajaona, A. Senthilkumar, Kalimuthu Vincent, I. Asch, F. |
| author_browse | Asch, F. Chuma, B.A. Cotter, M. Kalisa, A. Rajaona, A. Senthilkumar, Kalimuthu Stuerz, S. Vincent, I. |
| author_facet | Stuerz, S. Chuma, B.A. Cotter, M. Kalisa, A. Rajaona, A. Senthilkumar, Kalimuthu Vincent, I. Asch, F. |
| author_sort | Stuerz, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Nitrogen (N) is one of the main nutrients that drive rice grain yield and is intensely managed especially in lowlands under irrigated conditions. A set of experiments was conducted in mid‐ and high‐altitude sites in Rwanda to investigate the response of five genotypes under different sowing dates and different N management. Genotype grain yields were higher and more stable at mid‐altitude across sowing dates. N rates strongly affected grain yield at mid‐altitude (p < .0001), but not at high altitude. Postponing basal N had positive effects on yield and yield components in both sites, with more pronounced effects at high altitude. Increasing N rate beyond 120 kg/ha led to a decrease in percentage of panicles per tiller and spikelet fertility and a decrease in grain yield due to excessive tillers at both high altitude and mid‐altitude. Thus, basal N application should be recommended at high altitude and the increase in N rate up to 120 kg/ha at mid‐altitude. A strict observation of recommended planting date should be followed at high altitude, and the use of cold‐tolerant genotypes is encouraged. |
| format | Journal Article |
| id | CGSpace109081 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1090812024-05-01T08:19:24Z Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars Stuerz, S. Chuma, B.A. Cotter, M. Kalisa, A. Rajaona, A. Senthilkumar, Kalimuthu Vincent, I. Asch, F. rice altitude yield component research Nitrogen (N) is one of the main nutrients that drive rice grain yield and is intensely managed especially in lowlands under irrigated conditions. A set of experiments was conducted in mid‐ and high‐altitude sites in Rwanda to investigate the response of five genotypes under different sowing dates and different N management. Genotype grain yields were higher and more stable at mid‐altitude across sowing dates. N rates strongly affected grain yield at mid‐altitude (p < .0001), but not at high altitude. Postponing basal N had positive effects on yield and yield components in both sites, with more pronounced effects at high altitude. Increasing N rate beyond 120 kg/ha led to a decrease in percentage of panicles per tiller and spikelet fertility and a decrease in grain yield due to excessive tillers at both high altitude and mid‐altitude. Thus, basal N application should be recommended at high altitude and the increase in N rate up to 120 kg/ha at mid‐altitude. A strict observation of recommended planting date should be followed at high altitude, and the use of cold‐tolerant genotypes is encouraged. 2020-08 2020-08-27T17:04:14Z 2020-08-27T17:04:14Z Journal Article https://hdl.handle.net/10568/109081 en Open Access Wiley Chuma BA, Cotter M, Kalisa A, et al. (2020) Altitude, temperature, and N-Management effects on yield and yield components of contrasting lowland rice cultivars. J Agro Crop Sci. 206:456–465 |
| spellingShingle | rice altitude yield component research Stuerz, S. Chuma, B.A. Cotter, M. Kalisa, A. Rajaona, A. Senthilkumar, Kalimuthu Vincent, I. Asch, F. Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title | Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title_full | Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title_fullStr | Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title_full_unstemmed | Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title_short | Altitude, temperature, and N Management effects on yield and yield components of contrasting lowland rice cultivars |
| title_sort | altitude temperature and n management effects on yield and yield components of contrasting lowland rice cultivars |
| topic | rice altitude yield component research |
| url | https://hdl.handle.net/10568/109081 |
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