Canopy light and nitrogen distributions are related to grain yield and nitrogen use efficiency in rice

Gu, Junfei; Chen, Ying; Zhang, Hao; Li, Zhikang; Zhou, Qun; Yu, Chao; Kong, Xiangsheng; Liu, Lijun; Wang, Zhiqin; Yang, Jianchang

doi:10.1016/j.fcr.2017.02.021

Cited by 100 publications

(69 citation statements)

References 70 publications

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“…Clarifying the relationship between radiation and N in the canopy could help farmers use N efficiently in their crops. Improving the light distribution in the canopy can significantly increase canopy photosynthesis, yield potential, and NUE (Zhu et al, 2016;Gu et al, 2017;Khan et al, 2017;Yao et al, 2017). Improving the light distribution in the canopy can significantly increase canopy photosynthesis, yield potential, and NUE (Zhu et al, 2016;Gu et al, 2017;Khan et al, 2017;Yao et al, 2017).…”

Section: Researchmentioning

confidence: 99%

“…Canopy photosynthesis is an important determinant for crop production (Gu et al, 2014;Kromdijk and Long, 2016). Gu et al (2017) showed that coordinating the distribution of light and N within the rice canopy could maximize canopy photosynthesis and result in higher yield and NUE. Gu et al (2017) showed that coordinating the distribution of light and N within the rice canopy could maximize canopy photosynthesis and result in higher yield and NUE.…”

Section: Researchmentioning

confidence: 99%

“…Leaf N distribution within the canopy and its effects on leaf and canopy photosynthesis are major determinants of the canopy photosynthetic NUE (Gastal and Lemaire, 2002). This phenomenon was mainly due to plants allocating N according to the radiation distribution pattern within the canopy, that is, upper leaves exposed to greater levels of radiation accumulated more N than lower shaded leaves Zhao et al, 2016;Gu et al, 2017). This phenomenon was mainly due to plants allocating N according to the radiation distribution pattern within the canopy, that is, upper leaves exposed to greater levels of radiation accumulated more N than lower shaded leaves Zhao et al, 2016;Gu et al, 2017).…”

Section: Coordination Of Light Radiation and Nitrogenmentioning

confidence: 99%

“…This phenomenon was mainly due to plants allocating N according to the radiation distribution pattern within the canopy, that is, upper leaves exposed to greater levels of radiation accumulated more N than lower shaded leaves Zhao et al, 2016;Gu et al, 2017). Gu et al (2017) showed that improving light distribution in the canopy can significantly increase canopy photosynthesis, yield potential, and NUE. Gu et al (2017) showed that improving light distribution in the canopy can significantly increase canopy photosynthesis, yield potential, and NUE.…”

Section: Coordination Of Light Radiation and Nitrogenmentioning

confidence: 99%

“…Shaded leaves in the maize canopy account for >70% of the total leaf area, absorb ?30% of the total solar energy absorbed by the canopy, and contribute ?47% of total canopy photosynthesis (Song et al, 2013). Improving the light distribution in the canopy can significantly increase canopy photosynthesis, yield potential, and NUE (Zhu et al, 2016;Gu et al, 2017;Khan et al, 2017;Yao et al, 2017). Canopy photosynthesis is an important determinant for crop production (Gu et al, 2014;Kromdijk and Long, 2016).…”

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confidence: 99%

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Nitrogen Uptake and Response to Radiation Distribution in the Canopy of High‐Yield Maize

et al. 2019

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Nitrogen is an essential element for maize (Zea mays L.). Farmers in developed countries most often apply more N fertilizer than necessary, which reduces N use efficiency (NUE). Improving radiation and N distribution, and thus the NUE of modern maize production systems with high plant density, is of great significance. In this study, field experiments were conducted in 2014 and 2015 in Xinjiang, China, using hybrid maize cultivar DH618 with high density. In addition, a synthesis analysis was conducted using data from 95 publications to observe N characteristics under different yield levels and compare the experimental results with existing studies. The relationship between radiation and N distribution in the canopy of high‐yield maize was also assessed. Nitrogen uptake was significantly correlated with grain yield. However, N uptake per unit grain yield and grain N concentration at maturity decreased as grain yield increased. The positive correlations between radiation and leaf and stalk N concentrations at silking showed that N concentration at silking increased as the height of the canopy layer increased because of increased radiation in the canopy. These results indicate that maize hybrids with erect upper leaves and high post‐silking N uptake can coordinate and optimize the distribution of radiation and N in different canopy layers and thus improve NUE and yield under high‐density production.

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Section: Researchmentioning

confidence: 99%

Section: Researchmentioning

confidence: 99%

Section: Coordination Of Light Radiation and Nitrogenmentioning

confidence: 99%

Section: Coordination Of Light Radiation and Nitrogenmentioning

confidence: 99%

mentioning

confidence: 99%

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Nitrogen Uptake and Response to Radiation Distribution in the Canopy of High‐Yield Maize

et al. 2019

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Agronomic and physiological performance of an indica–japonica rice variety with a high yield and high nitrogen use efficiency

et al. 2020

Self Cite

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Hybrid rice (Oryza sativa L.) varieties usually need more N application to produce a higher grain yield and exhibit lower N use efficiency (NUE) than inbreds. However, little information is available about the mechanism underlying an indica-japonica rice variety with high yield and high NUE under low N rates. This study investigated this issue. The indica-japonica hybrid rice variety Yongyou 2640 (Y-2640) and the japonica inbred rice variety Lianjing 7 (L-7) were grown in a paddy field at N rates of 0 and 200 kg N ha −1 . The results showed that the grain yield and internal NUE (grain yield/total N uptake of plants) of Y-2640 were 16-23% and 9-10%, respectively, higher than those of L-7. A higher grain yield for Y-2640 was mainly attributed to the greater spikelet number per unit area that resulted from greater root oxidation activity at panicle initiation and its higher crop growth rate and net assimilation rate before heading. A higher leaf area index and greater root length, root, and shoot biomass were the important agronomic traits of Y-2640. Higher cytokinin content and the expression of genes involved in the amino acid transporters OsAAP1 and OsLHT1 in the roots and leaves, a higher photosynthetic NUE, and a greater N harvest index were the main physiological traits of Y-2640. The results suggest that improved agronomic and physiological performance accounts for the high yield and high NUE for the indica-japonica hybrid rice variety.Abbreviations: AE N , agronomic nitrogen use efficiency; CGR, crop growth rate; CTK, cytokinin; HI N , nitrogen harvest index; IE N , internal nitrogen use efficiency; IJHR, indica-japonica hybrid rice; JIR, japonica inbred rice; L-7, Lianjing 7; LAD, leaf area duration; NAR, net assimilation rate; NUE, nitrogen use efficiency; PNUE, photosynthetic nitrogen use efficiency; RE N , apparent recovery efficiency of nitrogen fertilizer; ROA, root oxidation activity; Y-2640, Yongyou 2640; Z+ZR, zeatin + zeatin riboside.

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Nitrogen forms affect the root characteristic, photosynthesis, grain yield, and nitrogen use efficiency of rice under different irrigation regimes

Guo-li

Jiang

et al. 2020

Crop Science

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Appropriate irrigation methods and N management can effectively increase the yield and N efficiency of rice (Oryza sativa L.). A soil‐grown experiment was conducted in 2018 and 2019 using Liangeng 7 with different N forms (NH3–N, NH4+ and NO3− mixed 50:50 [50:50], and NO3–N), as well as three irrigation regimes (submerged irrigation [0 kPa], alternate wetting and moderate drying [−20 kPa], and alternate wetting and severe drying [−40 kPa]). Results showed that yield and N agronomic efficiency were maximized at the alternative wetting and moderate dying treatment with NH4NO3 mixed among all treatments. Nitrogen forms in different irrigation regimes had different effects on root characteristic and leaf photosynthesis rate. In submerged irrigation, NH3–N treatment improved root morphology, increased the activities of NH3 assimilation enzymes in roots, and promoted root oxidation and leaf photosynthesis rate at different growth stages compared with other N forms. By contrast, moderate drying interacted with 50:50 and significantly enhanced root length, average root diameter, root volume, root tips, and root oxidation activity and promoted C and N metabolism in root and photosynthesis rate of leaves compared with other N forms under alternate wetting and drying irrigation. Multiple regression analysis showed that root length, the glutamate synthase (GOGAT) activity of roots, and the photosynthetic rate of leaves closely related with high rice yield and efficient N utilization. All these results suggested that improved root morphology and physiology activity, enhanced C and N metabolism, and increased leaf photosynthesis rate through the appropriate regulation of irrigation‐regime interaction with N forms can help to increase the grain yield and N agronomic efficiency of rice.

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Canopy light and nitrogen distributions are related to grain yield and nitrogen use efficiency in rice

Cited by 100 publications

References 70 publications

Nitrogen Uptake and Response to Radiation Distribution in the Canopy of High‐Yield Maize

Nitrogen Uptake and Response to Radiation Distribution in the Canopy of High‐Yield Maize

Agronomic and physiological performance of an indica–japonica rice variety with a high yield and high nitrogen use efficiency

Nitrogen forms affect the root characteristic, photosynthesis, grain yield, and nitrogen use efficiency of rice under different irrigation regimes

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