Abstract
This paper contains data from a two year FACE experiment with maize (Zea mays L., cv. ‘Romario’) investigating the interaction of two CO2 concentrations (378, 550 ppm) and two levels of water supply (sufficient: wet, limited: dry) on crop growth and plant composition. In the second year soil cover was also varied to test whether mitigation of evaporation by straw mulch increases the CO2 effect on water use efficiency. The datasets assembled herein contain data on weather, management, soil condition, soil moisture, phenology, dry weights and N concentrations of the plant (leaves, stems, cobs), green leaf area index, stem reserves, final yield and quality-related traits in the total plant and grains. Most of the experimental findings have already been published in scientific journals. Moreover, the data have been used in two crop modeling studies, and simulation results (on soil moisture, transpiration, evaporation and biomass) of one of these studies are also shown here.
Highlights
Climate change due to rising atmospheric CO2 concentration and associated increase in temperature and drought periods will have important implications for global food production (IPCC, 2013)
2.2 CO2 TREATMENTS: Three circular plots were equipped each with a free air CO2 enrichment apparatus including vertical vent pipes and CO2 injection driven by a blower (Erbs et al, 2012; Manderscheid et al, 2014)
The frames reduced incident photosynthetic active radiation (PAR) by 6.6% without tarpaulins based on the exposed horizontal area and by 24.1% with tarpaulins
Summary
Climate change due to rising atmospheric CO2 concentration and associated increase in temperature and drought periods will have important implications for global food production (IPCC, 2013). Maize is one of the most important crop species exhibiting the C4 photosynthetic pathway. Rising concentrations of CO2 (eCO2) have little or no effect on carbon fixation of C4 plants but decrease stomatal conductance (Kimball, 2016). The decrease in transpiration under eCO2 can mitigate the negative effects of drought on plant growth. We have conducted a two-year field experiment with maize and investigated the interaction of free air CO2 enrichment and water supply on growth, yield and plant composition. The experimental data have been used in two crop modeling studies (Durand et al, 2018; Kellner et al, 2019). The present paper contains most of the measurement results of this experiment as well as results of model simulations of Kellner et al (2019)
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