Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan
ABSTRACTDry direct-seeded rice (DDSR) cultivation is expected to reduce production costs compared with transplanted rice (TPR); however, its low N use efficiency (NUE) has hindered cost reduction. We conducted DDSR field experiments for 3 years using a standard cultivar (‘Akitakomachi’) and a high-y...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-04-01
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| Series: | Plant Production Science |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/1343943X.2023.2185531 |
| _version_ | 1797805396494123008 |
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| author | Mari Namikawa Takayuki Yabiku Maya Matsunami Toshinori Matsunami Toshihiro Hasegawa |
| author_facet | Mari Namikawa Takayuki Yabiku Maya Matsunami Toshinori Matsunami Toshihiro Hasegawa |
| author_sort | Mari Namikawa |
| collection | DOAJ |
| description | ABSTRACTDry direct-seeded rice (DDSR) cultivation is expected to reduce production costs compared with transplanted rice (TPR); however, its low N use efficiency (NUE) has hindered cost reduction. We conducted DDSR field experiments for 3 years using a standard cultivar (‘Akitakomachi’) and a high-yielding cultivar (‘Yumiazusa’) grown with a single application of coated urea (CU) or split applications of normal urea (NU) to determine factors limiting yield and NUE and compared growth and yields of TPR grown in adjacent fields. DDSR yield was lower than that of TPR at comparable N levels by 11% due to low fertilizer recovery rate, crop NUE (CNUE, yield per unit N uptake), and poor grain filling by meteorological factors. Crop N uptake at maturity in DDSR was similar to or even greater than that in TPR, but poor vegetative growth in DDSR and low crop N uptake until panicle formation (PF) resulted in limited spikelet density and CNUE compared with TPR. Analysis of the N uptake pattern suggests that enhancing early leaf development can improve N uptake until PF and thus CNUE in DDSR. NU yielded as much as CU, so it can potentially reduce the cost of production because of its lower price, but the optimal N proportion and application stage in the split application needs scrutinizing. ‘Yumiazusa’ had better initial growth, CNUE, and yield than ‘Akitakomachi’ in DDSR. To leverage these traits for further yield improvements, we also need to consider suitable phenological characteristics to ensure favorable climatic conditions during the grain-filling period. |
| first_indexed | 2024-03-13T05:51:27Z |
| format | Article |
| id | doaj.art-fd6cec2c72994daf98d13a872e32d704 |
| institution | Directory Open Access Journal |
| issn | 1343-943X 1349-1008 |
| language | English |
| last_indexed | 2024-03-13T05:51:27Z |
| publishDate | 2023-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj.art-fd6cec2c72994daf98d13a872e32d7042023-06-13T13:51:14ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082023-04-0126210111510.1080/1343943X.2023.2185531Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern JapanMari Namikawa0Takayuki Yabiku1Maya Matsunami2Toshinori Matsunami3Toshihiro Hasegawa4Tohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Morioka, JapanTohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Morioka, JapanThe United Graduate School of Agricultural Sciences, Iwate University, Morioka, JapanTohoku Agricultural Research Center, National Agriculture and Food Research Organization (NARO), Morioka, JapanInstitute for Agro-environmental Sciences, NARO, Tsukuba, JapanABSTRACTDry direct-seeded rice (DDSR) cultivation is expected to reduce production costs compared with transplanted rice (TPR); however, its low N use efficiency (NUE) has hindered cost reduction. We conducted DDSR field experiments for 3 years using a standard cultivar (‘Akitakomachi’) and a high-yielding cultivar (‘Yumiazusa’) grown with a single application of coated urea (CU) or split applications of normal urea (NU) to determine factors limiting yield and NUE and compared growth and yields of TPR grown in adjacent fields. DDSR yield was lower than that of TPR at comparable N levels by 11% due to low fertilizer recovery rate, crop NUE (CNUE, yield per unit N uptake), and poor grain filling by meteorological factors. Crop N uptake at maturity in DDSR was similar to or even greater than that in TPR, but poor vegetative growth in DDSR and low crop N uptake until panicle formation (PF) resulted in limited spikelet density and CNUE compared with TPR. Analysis of the N uptake pattern suggests that enhancing early leaf development can improve N uptake until PF and thus CNUE in DDSR. NU yielded as much as CU, so it can potentially reduce the cost of production because of its lower price, but the optimal N proportion and application stage in the split application needs scrutinizing. ‘Yumiazusa’ had better initial growth, CNUE, and yield than ‘Akitakomachi’ in DDSR. To leverage these traits for further yield improvements, we also need to consider suitable phenological characteristics to ensure favorable climatic conditions during the grain-filling period.https://www.tandfonline.com/doi/10.1080/1343943X.2023.2185531Coated ureadry direct-seeded rice (Oryza sativa L.)nitrogen uptake patternnitrogen use efficiencyspikelet density |
| spellingShingle | Mari Namikawa Takayuki Yabiku Maya Matsunami Toshinori Matsunami Toshihiro Hasegawa Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan Plant Production Science Coated urea dry direct-seeded rice (Oryza sativa L.) nitrogen uptake pattern nitrogen use efficiency spikelet density |
| title | Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan |
| title_full | Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan |
| title_fullStr | Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan |
| title_full_unstemmed | Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan |
| title_short | Nitrogen uptake pattern of dry direct-seeded rice and its contribution to yields in northeastern Japan |
| title_sort | nitrogen uptake pattern of dry direct seeded rice and its contribution to yields in northeastern japan |
| topic | Coated urea dry direct-seeded rice (Oryza sativa L.) nitrogen uptake pattern nitrogen use efficiency spikelet density |
| url | https://www.tandfonline.com/doi/10.1080/1343943X.2023.2185531 |
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