Articles | Volume 18, issue 16
Biogeosciences, 18, 4841–4853, 2021
https://doi.org/10.5194/bg-18-4841-2021
Biogeosciences, 18, 4841–4853, 2021
https://doi.org/10.5194/bg-18-4841-2021

Research article 30 Aug 2021

Research article | 30 Aug 2021

Effects of elevated CO2 and extreme climatic events on forage quality and in vitro rumen fermentation in permanent grassland

Vincent Niderkorn et al.

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Cited articles

Andueza, D., Rodrigues, A. M., Picard, F., Rossignol, N., Baumont, R., Cecato, U., and Farruggia, A.: Relationships between botanical composition, yield and forage quality of permanent grasslands over the first growth cycle, Grass Forage Sci., 71, 366–378, https://doi.org/10.1111/gfs.12189, 2016. 
Aufrere, J. and Michalet-Doreau, B.: Comparison of methods for predicting digestibility of feeds, Anim. Feed Sci. Tech., 20, 203–218, https://doi.org/10.1016/0377-8401(88)90044-2, 1988. 
Augustine, D. J., Blumenthal, D. M., Springer, T. L., LeCain, D. R., Gunter, S. A., and Derner, J. D.: Elevated CO2 induces substantial and persistent declines in forage quality irrespective of warming in mixedgrass prairie, Ecol. Appl., 28, 721–735, https://doi.org/10.1002/eap.1680, 2018. 
Benot, M. L., Morvan-Bertrand, A., Mony, C., Huet, J., Sulmon, C., Decau, M. L., Prud'Homme, M. P., and Bonis, A.: Grazing intensity modulates carbohydrate storage pattern in five grass species from temperate grasslands, Acta Oecol., 95, 108–115, https://doi.org/10.1016/j.actao.2018.11.005, 2019. 
Bergman, E. N.: Energy contributions of volatile fatty acids from the gastrointestinal tract in various species, Physiol. Rev., 70, 567–590, https://doi.org/10.1152/physrev.1990.70.2.567, 1990. 
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Short summary
Climate change can change vegetation characteristics in grasslands with a potential impact on forage chemical composition and quality, as well as its use by ruminants. Using controlled conditions mimicking a future climatic scenario, we show that forage quality and ruminant digestion are affected in opposite ways by elevated atmospheric CO2 and an extreme event (heat wave, severe drought), indicating that different factors of climate change have to be considered together.
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