In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems
Nitrogen (N) use efficiency in rainfed agriculture is generally low because of poor management and unavailability of suitable rice genotypes. There is a need to select rice genotypes with high N use efficiency for these specific environments, which was investigated at the Bangladesh Rice Research In...
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Frontiers Media S.A.
2021-01-01
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| Series: | Frontiers in Agronomy |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fagro.2020.607792/full |
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| author | Biswajit Karmakar Stephan M. Haefele Amelia Henry Md Humayun Kabir Aminul Islam Jatish Chandra Biswas |
| author_facet | Biswajit Karmakar Stephan M. Haefele Amelia Henry Md Humayun Kabir Aminul Islam Jatish Chandra Biswas |
| author_sort | Biswajit Karmakar |
| collection | DOAJ |
| description | Nitrogen (N) use efficiency in rainfed agriculture is generally low because of poor management and unavailability of suitable rice genotypes. There is a need to select rice genotypes with high N use efficiency for these specific environments, which was investigated at the Bangladesh Rice Research Institute, Regional Station, Rajshahi, in two successive years. The performance of six rice genotypes, IR7437170-1-1, BR7873-5*(NIL)-51-HR6, IR83377-B-B-93-3, International Rice Research Institute (IRRI) 123, IR83381-B-B-6-1, and Binadhan-7, were tested under four N rates (0, 55, 83, and 110 kg N ha−1) in a strip-plot design. Grain yields generally increased up to 83 kg N ha−1 and declined thereafter. Depending on N rates, mean grain yields increased by 35–45% compared to the control (N0). However, the grain yields of IR83377-B-B-93-3, IRRI 123, and Binadhan-7 increased up to 110 kg N ha−1. N uptake and its use efficiencies were the highest in IR83377-B-B-93-3, which was at par with those in IRRI 123. Bangladesh Rice Research Institute (BRRI) dhan56 and Binadhan-7 showed intermediate performance, while BRRI dhan57 and IR83381-B-B-6-1 showed lower N uptake and N efficiencies. Between 16.5 and 19.2 kg N uptake was required to produce 1 ton of paddy. The genotypes IR83381-B-B-93-3 and IRRI 123 were the most N use efficient irrespective of N rates, but BRRI dhan57 and IR87781-B-B-6-1 were observed to be inefficient genotypes, while BRRI dhan56 and Binadhan-7 were intermediate. Thus, this study indicates the need to test existing and new germplasm for optimal N rates and their NUE, especially in rainfed environments where optimized resource use is essential for higher yields and increased farmers' income. |
| first_indexed | 2024-12-21T13:49:29Z |
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| language | English |
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| spelling | doaj.art-c7ccf6645cf549a292e4b4c7f2b23f242022-12-21T19:01:46ZengFrontiers Media S.A.Frontiers in Agronomy2673-32182021-01-01210.3389/fagro.2020.607792607792In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed EcosystemsBiswajit Karmakar0Stephan M. Haefele1Amelia Henry2Md Humayun Kabir3Aminul Islam4Jatish Chandra Biswas5Adaptive Research Division, Bangladesh Rice Research Institute, Gazipur, BangladeshDepartment of Sustainable Agriculture Sciences, Rothamsted Research, Harpenden, United KingdomCrop Environmental Sciences Division, International Rice Research Institute, Los Banos, PhilippinesAdaptive Research Division, Bangladesh Rice Research Institute, Gazipur, BangladeshAdaptive Research Division, Bangladesh Rice Research Institute, Gazipur, BangladeshAdaptive Research Division, Bangladesh Rice Research Institute, Gazipur, BangladeshNitrogen (N) use efficiency in rainfed agriculture is generally low because of poor management and unavailability of suitable rice genotypes. There is a need to select rice genotypes with high N use efficiency for these specific environments, which was investigated at the Bangladesh Rice Research Institute, Regional Station, Rajshahi, in two successive years. The performance of six rice genotypes, IR7437170-1-1, BR7873-5*(NIL)-51-HR6, IR83377-B-B-93-3, International Rice Research Institute (IRRI) 123, IR83381-B-B-6-1, and Binadhan-7, were tested under four N rates (0, 55, 83, and 110 kg N ha−1) in a strip-plot design. Grain yields generally increased up to 83 kg N ha−1 and declined thereafter. Depending on N rates, mean grain yields increased by 35–45% compared to the control (N0). However, the grain yields of IR83377-B-B-93-3, IRRI 123, and Binadhan-7 increased up to 110 kg N ha−1. N uptake and its use efficiencies were the highest in IR83377-B-B-93-3, which was at par with those in IRRI 123. Bangladesh Rice Research Institute (BRRI) dhan56 and Binadhan-7 showed intermediate performance, while BRRI dhan57 and IR83381-B-B-6-1 showed lower N uptake and N efficiencies. Between 16.5 and 19.2 kg N uptake was required to produce 1 ton of paddy. The genotypes IR83381-B-B-93-3 and IRRI 123 were the most N use efficient irrespective of N rates, but BRRI dhan57 and IR87781-B-B-6-1 were observed to be inefficient genotypes, while BRRI dhan56 and Binadhan-7 were intermediate. Thus, this study indicates the need to test existing and new germplasm for optimal N rates and their NUE, especially in rainfed environments where optimized resource use is essential for higher yields and increased farmers' income.https://www.frontiersin.org/articles/10.3389/fagro.2020.607792/fullgrain yieldharvest indexagronomicinternalphysiological and recovery efficiency of N |
| spellingShingle | Biswajit Karmakar Stephan M. Haefele Amelia Henry Md Humayun Kabir Aminul Islam Jatish Chandra Biswas In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems Frontiers in Agronomy grain yield harvest index agronomic internal physiological and recovery efficiency of N |
| title | In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems |
| title_full | In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems |
| title_fullStr | In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems |
| title_full_unstemmed | In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems |
| title_short | In Quest of Nitrogen Use-Efficient Rice Genotypes for Drought-Prone Rainfed Ecosystems |
| title_sort | in quest of nitrogen use efficient rice genotypes for drought prone rainfed ecosystems |
| topic | grain yield harvest index agronomic internal physiological and recovery efficiency of N |
| url | https://www.frontiersin.org/articles/10.3389/fagro.2020.607792/full |
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