Articles | Volume 20, issue 14
https://doi.org/10.5194/bg-20-3119-2023
https://doi.org/10.5194/bg-20-3119-2023
Research article
 | 
31 Jul 2023
Research article |  | 31 Jul 2023

Potassium limitation of forest productivity – Part 2: CASTANEA-MAESPA-K shows a reduction in photosynthesis rather than a stoichiometric limitation of tissue formation

Ivan Cornut, Guerric le Maire, Jean-Paul Laclau, Joannès Guillemot, Yann Nouvellon, and Nicolas Delpierre

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Cited articles

Anschütz, U., Becker, D., and Shabala, S.: Going beyond nutrition: Regulation of potassium homoeostasis as a common denominator of plant adaptive responses to environment, J. Plant Physiol., 171, 670–687, https://doi.org/10.1016/j.jplph.2014.01.009, 2014. a
Armstrong, M. J. and Kirkby, E. A.: Estimation of Potassium Recirculation in Tomato Plants by Comparison of the Rates of Potassium and Calcium Accumulation in the Tops with Their Fluxes in the Xylem Stream, Plant Physiol., 63, 1143–1148, https://doi.org/10.1104/pp.63.6.1143, 1979. a
Asensio, V., Domec, J.-C., Nouvellon, Y., Laclau, J.-P., Bouillet, J.-P., Jordan-Meille, L., Lavres, J., Rojas, J. D., Guillemot, J., and Abreu-Junior, C. H.: Potassium fertilization increases hydraulic redistribution and water use efficiency for stemwood production in Eucalyptus grandis plantations, Environ. Exp. Bot., 176, 104085, https://doi.org/10.1016/j.envexpbot.2020.104085, 2020. a, b
Augusto, L., Ranger, J., Ponette, Q., and Rapp, M.: Relationships between forest tree species, stand production and stand nutrient amount, Ann. Forest Sci., 57, 313–324, https://doi.org/10.1051/forest:2000122, 2000. a
Baldocchi, D. and Penuelas, J.: The physics and ecology of mining carbon dioxide from the atmosphere by ecosystems, Glob. Change Biol., 25, 1191–1197, https://doi.org/10.1111/gcb.14559, 2019. a
Short summary
After simulating the effects of low levels of potassium on the canopy of trees and the uptake of carbon dioxide from the atmosphere by leaves in Part 1, here we tried to simulate the way the trees use the carbon they have acquired and the interaction with the potassium cycle in the tree. We show that the effect of low potassium on the efficiency of the trees in acquiring carbon is enough to explain why they produce less wood when they are in soils with low levels of potassium.
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