Interaction of CO2 enrichment and drought on growth, water use, and yield of broad bean (Vicia faba)

Effects of different atmospheric CO2 concentrations and soil moistures on the populations of bird cherry-oat aphid (Rhopalosiphum padi) feeding on spring wheat

“…This experiment was conducted in 1999 and 2000 respectively in field Open-Top Chambers (OTCf) (^1.5m x 2m) at Lanzhou (103.9°E, 36.0°N), Gansu, in the semi-arid region of Loess Plateau of China as described pre viously (Wu & Wang, 2000). The experiment consisted of nine treatments with factorial combinations of three CO2 concentra tions (700, 550 and 350 ppm) and three soil water levels (80, 60 and 40% of field water capacity, FWC).…”

“…Precipitation is limited in large parts of the world, and water is and will be a limiting factor for agricultural production in this area and many other regions (Zhao, 1996). As interactions of CO2 and soil water alter many traits of plants (Jiang, 1995;Lin, 1998;Wang, 1999;Kor ner, 2000;Wu & Wang, 2000), we propose that the inter actions of CO2 and soil water would probably change the performance of insects feeding on these plants, but the tendency is not clear. In this experiment, spring wheat was grown in a factorial design with three CO2 concentra tions and three soil water levels, and plants grown in each of the nine treatments were infested with bird cherryaphids (Rhopalosiphum padi Linnaeus).…”

Elevated Carbon Dioxide and Soil Moisture on Early Growth Response of Soybean

“…The extra carbon assimilates produced at high [CO 2 ] may ensure the full development of flowers and grains [93]. Further previous studies on [CO 2 ] enrichment reported that, increases in strawberry yield with an increase in fruit number [94], yield response of barley [78] and orange [95] related to the number of grain and fruits harvested, increase in the number of flower buds in cotton [13] and increase in broad bean yield by increase in bean number [81].…”

“…However, data on the interactive effects of [CO 2 ] and soil moisture on plants are scarce and often contradictory [28]. Some studies reported that the percentage increase in plant growth due to elevated CO 2 is generally not reduced by water stress [73] [74] whereas the results of many other theoretical projections and field or greenhouse experiments suggest that the relative effects of [CO 2 ] enrichment on plants are constrained by less than optimal levels of soil moisture [14] [78]- [81].…”

Adaptation of Boreal Field Crop Production to Climate Change

“…The enhanced availability of photosynthate resulting from high atmospheric CO 2 concentration has been shown to increase N fixation in several legume species, so grain quality and protein content are generally maintained ), but there is weak evidence for this in some of the cool-temperate adapted species grown in the boreal region. Doubled CO 2 concentration (700 ppm instead of 350 ppm) resulted in higher photosynthetic water use efficiency in faba bean (Vicia faba L.), the increase depending on cultivar (Avola et al, 2008), and occurring only when the water supply was not limiting (Wu & Wang, 2000) and when solar UV-B irradiance was not increased (Tosserams et al, 2001). The increased C:N ratio from elevated CO 2 concentration has implications for hay and silage cropping (Porter & Semenov, 2005), which are important components of boreal agricultural systems, and adequate protein content is a key factor determining forage quality.…”