scholarly journals Effects of the Elevated Atmospheric CO2 Concentration on the Water Use Efficiency of Winter Wheat

2015 ◽  
Vol 29 ◽  
pp. 180-181 ◽  
Author(s):  
Balázs Varga ◽  
Szilvia Bencze ◽  
Krisztina Balla ◽  
Ottó Veisz
Keyword(s):  
Winter Wheat ◽  
Water Use Efficiency ◽  
Water Use ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Elevated Atmospheric Co2 ◽  
Atmospheric Co2 Concentration ◽  
Use Efficiency

scholarly journals Effects of Elevated Atmospheric CO2 Concentration and Water Regime on Rice Yield, Water Use Efficiency, and Arsenic and Cadmium Accumulation in Grain

Agriculture ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 705
Author(s):  
Andrisa Balbinot ◽  
Anderson da Rosa Feijó ◽  
Marcus Vinicius Fipke ◽  
Dalvane Rockenbach ◽  
Joseph Harry Massey ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Rice Yield ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Rice Grain ◽  
Water Regimes ◽  
Elevated Atmospheric Co2 ◽  
Atmospheric Co2 Concentration ◽  
Use Efficiency

(1) Background: Elevated atmospheric CO2 concentration affects the growth and development of the rice crop. In Southern Brazil, rice is traditionally produced with continuous irrigation, implying a significant amount of water used. Besides, continuous flooding favors the uptake of toxic elements such as arsenic (As) and cadmium (Cd). In this work, one Brazilian rice cultivar (IRGA 424) was tested for the effects of elevated CO2 concentration and different water regimes on rice yield, and As and Cd accumulation in grain. (2) Methods: Rice was grown in two CO2 concentrations (400 and 700 µmol mol−1) and two irrigation regimes (continuous and intermittent). It was evaluated the number of tillers, plant height, aboveground dry weight (ADW), water use efficiency (WUE), rice yield components, and As and Cd concentration in rice grain. (3) Results: Rice plants were taller and had a higher WUE when cultivated at e[CO2]. The ADW and the rice yield component were not affected by CO2 levels nor water regimes. Intermittent flood regimes had a lower average As concentration. The Cd concentration in the samples in both growing seasons and all treatments was below the limit of quantitation (8.76 μg kg−1). (4) Conclusions: Enhanced CO2 concentration did not affect rice yield, increased the WUE, and reduced As concentration in grains. Regarding water management, the intermittent regime enhanced WUE and promoted a reduction in As concentration in grains.

scholarly journals Elevated atmospheric CO2 concentration improves water use efficiency and growth of a widespread Cerrado tree species even under soil water deficit

2019 ◽  
Vol 33 (3) ◽  
pp. 425-436 ◽  
Author(s):  
João Paulo Souza ◽  
Nayara Magry Jesus Melo ◽  
Alessandro Dias Halfeld ◽  
Kamilla I. C. Vieira ◽  
Bruno Luan Rosa
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Deficit ◽  
Water Use ◽  
Tree Species ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Soil Water Deficit ◽  
Elevated Atmospheric Co2 ◽  
Use Efficiency

Effects of elevated CO2 concentration on growth and water use efficiency of winter wheat under two soil water regimes

2010 ◽  
Vol 97 (11) ◽  
pp. 1742-1748 ◽  
Author(s):  
Yunzhou Qiao ◽  
Huizhen Zhang ◽  
Baodi Dong ◽  
Changhai Shi ◽  
Yuxin Li ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Water Use Efficiency ◽  
Soil Water ◽  
Elevated Co2 ◽  
Water Use ◽  
Co2 Concentration ◽  
Elevated Co2 Concentration ◽  
Water Regimes ◽  
Use Efficiency

scholarly journals Drought-induced mortality selectively affects Scots pine trees that show limited intrinsic water-use efficiency responsiveness to raising atmospheric CO2

2014 ◽  
Vol 41 (3) ◽  
pp. 244 ◽  
Author(s):  
Ana-Maria Hereş ◽  
Jordi Voltas ◽  
Bernat Claramunt López ◽  
Jordi Martínez-Vilalta
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Tree Mortality ◽  
Intercellular Co2 Concentration ◽  
Co2 Concentration ◽  
Atmospheric Co2 ◽  
Growth Enhancement ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency ◽  
The Impact

Widespread drought-induced tree mortality has been documented around the world, and could increase in frequency and intensity under warmer and drier conditions. Ecophysiological differences between dying and surviving trees might underlie predispositions to mortality, but are poorly documented. Here we report a study of Scots pines (Pinus sylvestris L.) from two sites located in north-eastern Iberian Peninsula where drought-associated mortality episodes were registered during the last few decades. Time trends of discrimination against 13C (Δ13C) and intrinsic water-use efficiency (WUEi) in tree rings at an annual resolution and for a 34 year period were used to compare co-occurring now-dead and surviving pines. Results indicate that both surviving and now-dead pines significantly increased their WUEi over time, although this increase was significantly lower for now-dead individuals. These differential WUEi trends corresponded to different scenarios describing how plant gas exchange responds to increasing atmospheric CO2 (Ca): the estimated intercellular CO2 concentration was nearly constant in surviving pines but tended to increase proportionally to Ca in now-dead trees. Concurrently, the WUEi increase was not paralleled by a growth enhancement, regardless of tree state, suggesting that in water-limited areas like the Mediterranean, it cannot overcome the impact of an increasingly warmer and drier climate on tree growth.

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