Modeling acclimation of leaf photosynthesis to atmospheric CO2 enrichment

The optimal atmospheric CO2 concentration for the growth of winter wheat (Triticum aestivum)

“…Unfortunately, this confounding effect is already happening and is most likely to become worse in the future because future climate change may come with increasing atmospheric CO 2 concentration, temperature, N deposition, and possibly precipitation in most temperate regions where wheat grows (IPCC, 2013). In addition, the response of plants to elevated atmospheric CO 2 concentration is further complicated by considering the acclimation and adaptation of plants (Drewry et al, 2010;Gutierrez et al, 2013;Biernath et al, 2013). Thus the optimal concentration of CO 2 fertilization in the real world under future climate change could be different from the findings of the current study.…”

Photosynthesis in a Changing Global Climate: Scaling Up and Scaling Down in Crops

“…In contrast, the more complex structure of the GECROS model can simulate the acclimation of photosynthesis to higher CO 2 levels, which has been observed in FACE experiments. This good model performance is based on a better consideration of plant internal C−N interactions ( Thornley, 1998 , 2004 ) within the GECROS model ( Biernath et al, 2013 ; Yin, 2013 ).…”

“…It is assumed that nitrogen contents are not optimal if the mineral nitrogen uptake from the soil cannot fulfill plant nitrogen demand given as the sum of the differences between actual and optimal concentrations in the plant organs ( Priesack and Gayler, 2009 ). More complex nitrogen uptake models can also simulate the observed increase in photosynthetic nitrogen-use-efficiency and decreased tissue N concentrations at elevated [CO 2 ] ( Biernath et al, 2013 ; Vanuytrecht and Thorburn, 2017 ). This is achieved for example by incorporating a functional balance between root N acquisition and shoot C gain in GECROS ( Yin and van Laar, 2005 ; Priesack and Gayler, 2009 ), or by including an adaptation of photosynthetic N demand to atmospheric [CO 2 ] as in the growth model AgPasture of APSIM ( Cullen et al, 2009 ).…”

Modeling perceptions of climatic risk in crop production

“…In the APSIM model, a trigger mechanism is used to adjust tactical decision-making in the context of response farming [ 33 ]. The FarmActor model, as coupled to the Expert-N crop model [ 23 , 34 – 37 ], incorporates all the functionality of the APSIM model in terms of daily management in response to soil-crop-weather dynamics [ 32 ]. FarmActor is further able to adapt simulated crop management in response to long-term climatic influences through model-endogenous mechanisms.…”