Details

Autor(en) / Beteiligte

• Kimball, B. A.
• Morris, C. F.
• Pinter, P. J.
• Wall, G. W.
• Hunsaker, D. J.
• Adamsen, F. J.
• LaMorte, R. L.
• Leavitt, S. W.
• Thompson, T. L.
• Matthias, A. D.
• Brooks, T. J.

Titel

Elevated CO2, drought and soil nitrogen effects on wheat grain quality

Ist Teil von

• The New phytologist, 2001-05, Vol.150 (2), p.295-303

Ort / Verlag

Oxford, UK: Blackwell Science Ltd

Erscheinungsjahr

2001

Quelle

Wiley Online Library Journals【Remote access available】

Beschreibungen/Notizen

• Summary •  The likely consequences of future high levels of atmospheric CO2 concentration on wheat (Triticum aestivum L.) grain nutritional and baking quality were determined. •  Two free‐air CO2 enrichment (FACE; 550 mmol mol−1) experiments were conducted at ample (Wet) and limiting (Dry) levels of irrigation, and a further two experiments at ample (High‐N) and limiting (Low‐N) nitrogen concentrations. Harvested grain samples were subjected to a battery of nutritional and bread‐making quality tests. •  The Dry treatment improved grain quality slightly (protein +2%; bread loaf volume +3%). By contrast, Low‐N decreased quality drastically (protein −36%; loaf volume −26%). At ample water and N, FACE decreased quality slightly (protein −5%; loaf volume −2%) in the irrigation experiments and there was no change in the nitrogen experiments. At Low‐N, FACE tended to make the deleterious effects of Low‐N worse (protein −33% and −39%, at ambient CO2 and FACE, respectively; loaf volume −22% and −29% at ambient CO2 and FACE, respectively). •   The data suggest that future elevated CO2 concentrations will exacerbate the deleterious effects of low soil nitrogen on grain quality, but with ample nitrogen fertilizer, the effects will be minor.