Effect of Elevated CO<SUB>2</SUB> Concentration and Nitrogen Application on Translocation of Dry Matter and Nitrogen Restored before Anthesis in Winter Wheat

Abstract

Either CO 2 enrichment or nitrogen (N) application has effects to increase grain yield, as well as dry matter and N accumulation in winter wheat (Triticum aestivum L.). To understand the effects and interaction of both factors on dry matter and N restored before anthesis and translocated from vegetative organs into grains, we carried out a pot experiment across two cropping seasons using wheat cultivars Xiaoyan 22 (2007)(2008) and Xiaoyan 22 and Xiaoyan 6 (2008-2009). Wheat cultivars were grown in open top chambers (OTCs) under conditions of ambient CO 2 concentration (AT, 375 μL L −1 ) and elevated CO 2 concentration (ET, 680

Effects of Elevated CO2 and Increased N Fertilization on Plant Secondary Metabolites and Chewing Insect Fitness

“…Increased N fertilization is expected to enhance the N content in plants grown under eCO 2 . Previous studies have shown that increased N fertilization of wheat plants increases nitrate reductase activity, whereas eCO 2 reduces it, and the combined effects result in additional protein content (Pal et al, 2005; Xu et al, 2011). However, Sudderth et al (2005) indicated that higher N availability in the presence of eCO 2 increased foliar N content in Amaranthus viridis (C 4 plant), but had no effect on Solanum dulcamara (C 3 plant).…”