State of knowledge on effects of global climate change on vegetables

Data that should hold predictive value for climatic change responses of agronomic crops and some natural ecosystems are available from open-air or naturally lit compartments. Even for vegetable crops, such as potatoes (Solanum tuberosum L.) and cabbage (Brassica oleracea L. var. capitata L.) grown on 18 and 2 Mha worldwide, respectively, little is known about reactions to global climatic change. The available data are mostly based on greenhouse and growth chamber studies. Greenhouse studies of carbon dioxide concentration ([CO2]) response are particularly problematic, since typical CO2 enrichment levels (1000 to 1200 |mmol mol-1) are much higher than [CO2] predicted for the next century. Another problem with these studies is that greenhouses are not CO2-enriched during sunny weather because they must be ventilated for cooling, which prevents control of [CO2]. This problem also eliminates much of the value of CO2 enrichment for greenhouse production.

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Guide to Alternative Fuels

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