Abstract
The effects of doubled carbon dioxide concentration and elevated temperature were evaluated by means of a crop growth model. Total dry matter production and tuber yield of potato cultivars, growing on a sandy loam were simulated for Dutch weather conditions, considering cultivar differences for earliness and soil moisture content as variables. Averaged over the years 1988–1991, a simulated increase of the carbon dioxide concentration from 350 vpm to 700 vpm increased tuber dry matter production by 22% for late cultivars and 29% for early cultivars. The effects were smaller for late cultivars irrespective of the occurrence of a drought period.
Elevated temperature reduced the positive effect of carbon dioxide because the stimulation of leaf area expansion in the juvenile stage, was upset later in the season due to an early start of foliage senescence. Raised temperature had only a net positive effect for conditions of optimum water supply and high irradiance during the juvenile stage, combined with a severe late drought. Then, the larger foliage prevented a rapid decrease in light interception during senescence.
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Schapendonk, A.H.C.M., Pot, C.S., Goudriaan, J. (1995). Simulated effects of elevated carbon dioxide concentration and temperature on the productivity of potato. In: Haverkort, A.J., MacKerron, D.K.L. (eds) Potato Ecology And modelling of crops under conditions limiting growth. Current Issues in Production Ecology, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0051-9_7
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DOI: https://doi.org/10.1007/978-94-011-0051-9_7
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