Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice
The remarkable yield performance of super hybrid rice has played a crucial role in ensuring global food security. However, there is a scarcity of studies investigating the contribution of radiation use efficiency (RUE) to hybrid rice yields under different nitrogen and potassium treatments. In this...
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MDPI AG
2023-08-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/15/2858 |
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| author | Jun Deng Jiayu Ye Xuefen Zhong Qingqing Yang Matthew Tom Harrison Chunhu Wang Liying Huang Xiaohai Tian Ke Liu Yunbo Zhang |
| author_facet | Jun Deng Jiayu Ye Xuefen Zhong Qingqing Yang Matthew Tom Harrison Chunhu Wang Liying Huang Xiaohai Tian Ke Liu Yunbo Zhang |
| author_sort | Jun Deng |
| collection | DOAJ |
| description | The remarkable yield performance of super hybrid rice has played a crucial role in ensuring global food security. However, there is a scarcity of studies investigating the contribution of radiation use efficiency (RUE) to hybrid rice yields under different nitrogen and potassium treatments. In this three-year field experiment, we aimed to evaluate the impact of two hybrid rice varieties (Y-liangyou 900: YLY900 and Quanyouhuazhan: QYHZ) under varying nitrogen regimes (N<sub>90</sub>: 90 kg N ha<sup>−1</sup>, N<sub>120</sub>: 120 kg N ha<sup>−1</sup>, N<sub>180</sub>: 180 kg N ha<sup>−1</sup>) and potassium regimes (K<sub>120</sub>: 120 kg K<sub>2</sub>O ha<sup>−1</sup>, K<sub>160</sub>: 160 kg K<sub>2</sub>O ha<sup>−1</sup>, K<sub>210</sub>: 210 kg K<sub>2</sub>O ha<sup>−1</sup>) on grain yield and its physiological determinants, including RUE, intercepted photosynthetically active radiation (IPAR), aboveground biomass production, and harvest index (HI). Our results revealed that both rice varieties exhibited significantly higher yields when coupled with nitrogen and potassium fertilization. Compared to the N<sub>90</sub> × K<sub>120</sub> treatment, the N<sub>120</sub> × K<sub>160</sub> and N<sub>180</sub> × K<sub>210</sub> combinations resulted in substantial increases in grain yield (12.0% and 21.1%, respectively) and RUE (11.9% and 21.4%, respectively). The YLY900 variety showed notable yield improvement due to enhanced aboveground biomass production resulting from increased IPAR and RUE. In contrast, the QYHZ variety’s aboveground biomass accumulation was primarily influenced by RUE rather than IPAR, resulting in higher RUE and grain yields of 9.2% and 5.3%, respectively, compared to YLY900. Importantly, fertilization led to significant increases in yield, biomass, and RUE, while HI remained relatively constant. Both varieties demonstrated a positive relationship between grain yield and IPAR and RUE. Multiple regression analysis indicated that increasing RUE was the primary driver of yield improvement in hybrid rice varieties. By promoting sustainable agriculture and enhancing fertilizer management, elevating nitrogen and potassium levels from a low base would synergistically enhance rice yield and RUE, emphasizing the critical importance of RUE in hybrid rice productivity compared to HI. |
| first_indexed | 2024-03-11T00:18:10Z |
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| spelling | doaj.art-28c53584b1c04d71a8f57afe7e0dc96e2023-11-18T23:26:50ZengMDPI AGPlants2223-77472023-08-011215285810.3390/plants12152858Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid RiceJun Deng0Jiayu Ye1Xuefen Zhong2Qingqing Yang3Matthew Tom Harrison4Chunhu Wang5Liying Huang6Xiaohai Tian7Ke Liu8Yunbo Zhang9MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaAgricultural and Rural Bureau of Duodao District, Jingmen 448000, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaTasmanian Institute of Agriculture, University of Tasmania, Burnie 7320, AustraliaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaMARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, College of Agriculture, Yangtze University, Jingzhou 434025, ChinaThe remarkable yield performance of super hybrid rice has played a crucial role in ensuring global food security. However, there is a scarcity of studies investigating the contribution of radiation use efficiency (RUE) to hybrid rice yields under different nitrogen and potassium treatments. In this three-year field experiment, we aimed to evaluate the impact of two hybrid rice varieties (Y-liangyou 900: YLY900 and Quanyouhuazhan: QYHZ) under varying nitrogen regimes (N<sub>90</sub>: 90 kg N ha<sup>−1</sup>, N<sub>120</sub>: 120 kg N ha<sup>−1</sup>, N<sub>180</sub>: 180 kg N ha<sup>−1</sup>) and potassium regimes (K<sub>120</sub>: 120 kg K<sub>2</sub>O ha<sup>−1</sup>, K<sub>160</sub>: 160 kg K<sub>2</sub>O ha<sup>−1</sup>, K<sub>210</sub>: 210 kg K<sub>2</sub>O ha<sup>−1</sup>) on grain yield and its physiological determinants, including RUE, intercepted photosynthetically active radiation (IPAR), aboveground biomass production, and harvest index (HI). Our results revealed that both rice varieties exhibited significantly higher yields when coupled with nitrogen and potassium fertilization. Compared to the N<sub>90</sub> × K<sub>120</sub> treatment, the N<sub>120</sub> × K<sub>160</sub> and N<sub>180</sub> × K<sub>210</sub> combinations resulted in substantial increases in grain yield (12.0% and 21.1%, respectively) and RUE (11.9% and 21.4%, respectively). The YLY900 variety showed notable yield improvement due to enhanced aboveground biomass production resulting from increased IPAR and RUE. In contrast, the QYHZ variety’s aboveground biomass accumulation was primarily influenced by RUE rather than IPAR, resulting in higher RUE and grain yields of 9.2% and 5.3%, respectively, compared to YLY900. Importantly, fertilization led to significant increases in yield, biomass, and RUE, while HI remained relatively constant. Both varieties demonstrated a positive relationship between grain yield and IPAR and RUE. Multiple regression analysis indicated that increasing RUE was the primary driver of yield improvement in hybrid rice varieties. By promoting sustainable agriculture and enhancing fertilizer management, elevating nitrogen and potassium levels from a low base would synergistically enhance rice yield and RUE, emphasizing the critical importance of RUE in hybrid rice productivity compared to HI.https://www.mdpi.com/2223-7747/12/15/2858nitrogenpotassiumgrain yieldbiomass productionradiation use efficiencyharvest index |
| spellingShingle | Jun Deng Jiayu Ye Xuefen Zhong Qingqing Yang Matthew Tom Harrison Chunhu Wang Liying Huang Xiaohai Tian Ke Liu Yunbo Zhang Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice Plants nitrogen potassium grain yield biomass production radiation use efficiency harvest index |
| title | Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice |
| title_full | Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice |
| title_fullStr | Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice |
| title_full_unstemmed | Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice |
| title_short | Optimizing Grain Yield and Radiation Use Efficiency through Synergistic Applications of Nitrogen and Potassium Fertilizers in Super Hybrid Rice |
| title_sort | optimizing grain yield and radiation use efficiency through synergistic applications of nitrogen and potassium fertilizers in super hybrid rice |
| topic | nitrogen potassium grain yield biomass production radiation use efficiency harvest index |
| url | https://www.mdpi.com/2223-7747/12/15/2858 |
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