Modeling the global warming effect on the upper limito of water uptake by plants
(2011) International Conference on Climate Change and Global Warming (ICCCGW 2011) — Location: Venice (Italy) (28.November.2011)
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- Abstract
- It is generally considered that the world temperature rises by 0.03 °C yr-1. The critical air filled porosity of soil at which oxygen stress occurs and, hence, the Upper Limit of the crop Water Uptake (ULWU) highly depends on soil temperature. In this paper we compute the effect of global warming on the ULWU, using a conceptual and physical based ULWU model. Using fifty four soils selected from the UNSODA database, we evaluate the ULWU sensitivity to projected global temperature change. The analysis shows that for a wide range of soils, the mean value of plant available water could decline by more than 4% and 50%, if temperature raises by 1K and 7K respectively. These reductions of plant available water could be more more serious in clayey than in sandy soils. In consequence of global warming, crops may face with water stress, since the decrease in ULWU may be accompanied by an increase in the Lower Limit of Water Uptake (LLWU) as well. Because of the strong relationship between the yield and plant available water, we suspect that the global warming could result in the reduction of agricultural yields and subsequently more food scarcity, in particular if plant physiological water stress mediating feedback mechanisms are not sufficiently developed.
- Affiliations
University of Zanjan Iran
Citations
Mohammadi, M. H., & Vanclooster, M. (2011). Modeling the global warming effect on the upper limito of water uptake by plants. Proceedings. International Conference on Climate Change and Global Warming (ICCCGW 2011), Venice (Italy). https://hdl.handle.net/2078.5/226043