Elevated Atmospheric CO Concentration Has Limited Effect on Wheat Grain Quality Regardless of Nitrogen Supply.

Elevated atmospheric CO concentrations (e[CO]) can decrease the grain quality of wheat. However, little information exists concerning interactions between e[CO] and nitrogen fertilization on important grain quality traits. To investigate this, a 2-year free air CO enrichment (FACE) experiment was conducted with two CO (393 and 600 ppm) and three (deficiency, adequate, and excess) nitrogen levels.

Effects of free air carbon dioxide enrichment (FACE) on nitrogen assimilation and growth of winter wheat under nitrate and ammonium fertilization.

A 2-year Free Air CO Enrichment (FACE) experiment was conducted with winter wheat. It was investigated whether elevated atmospheric CO concentration (e[CO ]) inhibit nitrate assimilation and whether better growth and nitrogen acquisition under e[CO ] can be achieved with an ammonium-based fertilization as it was observed in hydroponic culture with wheat. Under e[CO ] a decrease in nitrate assimilation has been discussed as the cause for observed declines in protein concentration in C cereals.

Biomass responses in a temperate European grassland through 17 years of elevated CO.

Future increase in atmospheric CO concentrations will potentially enhance grassland biomass production and shift the functional group composition with consequences for ecosystem functioning. In the "GiFACE" experiment (Giessen Free Air Carbon dioxide Enrichment), fertilized grassland plots were fumigated with elevated CO (eCO ) year-round during daylight hours since 1998, at a level of +20% relative to ambient concentrations (in 1998, aCO was 364 ppm and eCO 399 ppm; in 2014, aCO was 397 ppm and eCO 518 ppm). Harvests were conducted twice annually through 23 years including 17 years with eCO (1998 to 2014).

Effects of the thermal environment on metabolism of deoxynivalenol and thermoregulatory response of sheep fed on corn silage grown at enriched atmospheric carbon dioxide and drought.

Future livestock production is likely to be affected by both rising ambient temperatures and indirect effects mediated by modified growth conditions of feed plants such as increased atmospheric CO2 concentrations and drought. Corn was grown at elevated CO2 concentrations of 550 ppm and drought stress using free air carbon dioxide enrichment technology. Whole plant silages were generated and fed to sheep kept at three climatic treatments.

Effects of free air carbon dioxide enrichment and drought stress on the feed value of maize silage fed to sheep at different thermal regimes.

Information about the effects of rising atmospheric CO2 concentration and drought on the feed value of maize silage and interactions with the thermal environment during feeding is limited. A free air carbon dioxide enrichment facility was operated in a maize field to generate an elevated CO2 concentration of 550 ppm. Drought was induced by the exclusion of precipitation in one half of all experimental plots.

Effects of elevated atmospheric CO2 concentrations on the quantitative protein composition of wheat grain.

The continuing increase in atmospheric CO 2 concentration is predicted to enhance biomass production and to alter biochemical composition of plant tissues. In the present study, winter wheat ( Triticum aestivum L. cv.