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Wall, Gerard W.; Adam, Neal R.; Brooks, T. J.; Kimball, Bruce A.; Pinter, P. J.; LaMorte, R. L.; Adamsen, F. J.; Hunsaker, Douglas J.; Wechsung, Gabrielle; Wechsung, Frank; Grossman‐Clarke, Susanne; Leavitt, Steven W.; Matthias, A. D.; Webber, Andrew N.

doi:10.1023/a:1010646225929

Cited by 54 publications

(4 citation statements)

References 20 publications

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“…However, after prolonged exposure (days to weeks) to increased CO 2 concentrations, the stimulation of photosynthesis slows down and the crop yield stagnates. Accordingly, the weaker growth and yield estimations of particularly N-deficient C 3 plants, as well as wheat crops, due to down-regulation of photosynthesis under increased CO 2 have been documented (Drake et al 1997;Wall et al 2000). The inhibition of N assimilation under increased CO 2 , suggesting a decline in shoot N, was also reported recently (Bloom et al 2014).…”

Section: Discussionmentioning

confidence: 81%

The long-term effect of climate change on productivity of winter wheat in Denmark: a scenario analysis using three crop models

et al. 2017

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SUMMARYThe response of grain yield, grain nitrogen (N), phenological development and evapotranspiration of winter wheat to climate change was analysed over an 80-year period based on climate change predictions of four regional circulation models (RCMs) under the IPCC (International Panel on Climate Change) A1B emission scenario for the 21st century using three process-based models; A 20-year set (1991–2010) of observed daily climate data from Aarslev, Denmark was used to form the baseline, from which the RCM data were generated. The simulation of crop growth was performed with increasing carbon dioxide (CO2) levels and under continuous mono-cropping system at different N input rates. Results indicated that grain yield and grain N will be reduced in the future despite increased CO2 concentration in the atmosphere. While the increased N input may increase yield, it will not increase grain N. The present study suggested that in Denmark, alternative strategies for organic N acquisition of plants must be developed. Statistical analyses showed that while the crop models were the main source of uncertainty in estimating crop performance indicators in response to climate change, the choice of RCM was the main source of uncertainty in relation to baseline estimations.

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Section: Discussionmentioning

confidence: 81%

The long-term effect of climate change on productivity of winter wheat in Denmark: a scenario analysis using three crop models

et al. 2017

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“…This is further proved by significant correlation coefficient values of different physiological parameters of O 3 -exposed plants upon N amendments (Tables 2, 3). Increased g s upon N amendments have been reported in wheat (Wall et al, 2000), larch (Mao et al, 2014), cluster bean (Gupta and Tiwari, 2020), etc. A decrease in g s along with an increased A upon N amendments and O 3 exposure in poplar has been reported by Zhang et al (2018).…”

Section: Discussionmentioning

confidence: 99%

Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

et al. 2023

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The present study investigates the efficiency of nitrogen (N) amendments in the management of ozone (O3) stress in two varieties (Kashi Sheetal and Kashi Harittima) of Indian bean (Dolichos lablab L.). Two O3 concentrations, ambient (44.9 ppb) and elevated (74.64 ppb) were used, and each O3 concentration has 3 nitrogen (N) dose treatments viz recommended (N1), 1.5 times recommended (N2), 2 times recommended (N3) and no nitrogen, which served as control (C). The experiment concluded Kashi Sheetal as O3 tolerant, as compared to Kashi Harittima. N amendments were effective in the partial amelioration of O3 stress, with N2 being the most effective nitrogen dose, at both ambient and elevated O3 concentrations. Kashi Sheetal has been determined to be O3 tolerant due to greater endogenous levels of H2O2 accumulation and enzymatic antioxidant contents with O3 exposure. The O3-sensitive variety, Kashi Harittima, responded more positively to N treatments, at both O3 concentrations. The positive effect of N amendments is attributed to the stimulated antioxidative enzyme activity, rather than the biophysical processes like stomatal conductance. Strengthened defense upon N amendments was attributed to the enhanced activities of APX and GR in Kashi Sheetal, while in Kashi Harittima, the two enzymes (APX and GR) were coupled by SOD and CAT as well, during the reproductive phase. Yield (weight of seeds plant-1) increments upon N (N2) amendments were higher in Kashi Harittima (O3 sensitive), as compared to Kashi Sheetal (O3 tolerant) at both ambient and elevated O3 concentration, due to higher antioxidant enzymatic response and greater rate of photosynthesis in the former.

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“…Mini-FACE systems as small as 1 m diameter have been developed (Miglietta et al 1996), but they do not escape many of the problems of enclosures outlined above. For example, substantial differences in the photosynthetic response of wheat to elevated [CO 2 ] were observed in a mini-FACE (Miglietta et al 1996) versus a full-size FACE system (Nie et al 1995a,b;Wall et al 2000). This review is therefore limited to full-size FACE systems of more than 8 m diameter plots and with the five major food crops at the global scale; i.e.…”

Section: Free-air Concentration Enrichmentmentioning

confidence: 99%

Global food insecurity. Treatment of major food crops with elevated carbon dioxide or ozone under large-scale fully open-air conditions suggests recent models may have overestimated future yields

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et al. 2005

Phil. Trans. R. Soc. B

247

149

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Predictions of yield for the globe's major grain and legume arable crops suggest that, with a moderate temperature increase, production may increase in the temperate zone, but decline in the tropics. In total, global food supply may show little change. This security comes from inclusion of the direct effect of rising carbon dioxide (CO 2 ) concentration, [CO 2 ], which significantly stimulates yield by decreasing photorespiration in C 3 crops and transpiration in all crops. Evidence for a large response to [CO 2 ] is largely based on studies made within chambers at small scales, which would be considered unacceptable for standard agronomic trials of new cultivars or agrochemicals. Yet, predictions of the globe's future food security are based on such inadequate information. Free-Air Concentration Enrichment (FACE) technology now allows investigation of the effects of rising [CO 2 ] and ozone on field crops under fully open-air conditions at an agronomic scale. Experiments with rice, wheat, maize and soybean show smaller increases in yield than anticipated from studies in chambers. Experiments with increased ozone show large yield losses (20%), which are not accounted for in projections of global food security. These findings suggest that current projections of global food security are overoptimistic. The fertilization effect of CO 2 is less than that used in many models, while rising ozone will cause large yield losses in the Northern Hemisphere. Unfortunately, FACE studies have been limited in geographical extent and interactive effects of CO 2 , ozone and temperature have yet to be studied. Without more extensive study of the effects of these changes at an agronomic scale in the open air, our ever-more sophisticated models will continue to have feet of clay.

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Cited by 54 publications

References 20 publications

The long-term effect of climate change on productivity of winter wheat in Denmark: a scenario analysis using three crop models

The long-term effect of climate change on productivity of winter wheat in Denmark: a scenario analysis using three crop models

Combating ozone stress through N fertilization: A case study of Indian bean (Dolichos lablab L.)

Global food insecurity. Treatment of major food crops with elevated carbon dioxide or ozone under large-scale fully open-air conditions suggests recent models may have overestimated future yields

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