Effects of free-air CO2 enrichment on energy traits and seed quality of oilseed rape

Publikations-Art
Zeitschriftenbeitrag (peer-reviewed)
Autoren
Högy, P., Franzaring, J., Schwadorf, K., Breuer, J., Schütze, W., Fangmeier, A.
Erscheinungsjahr
2010
Veröffentlicht in
Agriculture, Ecosystems & Environment
Band/Volume
139/
ISBN / ISSN / eISSN
DOI: 10.1016/j.agee.2010.08.009
Seite (von - bis)
239-244
Abstract

<!-- /* Font Definitions */ @font-face {font-family:Times-Roman; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-alt:"Arial Unicode MS"; mso-font-charset:128; mso-generic-font-family:auto; mso-font-format:other; mso-font-pitch:auto; mso-font-signature:1 134676480 16 0 131072 0;} @font-face {font-family:"\@Times-Roman"; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-charset:128; mso-generic-font-family:auto; mso-font-format:other; mso-font-pitch:auto; mso-font-signature:1 134676480 16 0 131072 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; mso-fareast-language:DE;} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 2.0cm 70.85pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Previous experiments have not considered in situ evaluations of oilseed rape (OSR) under European climates on energetic value and seed security. Therefore, Brassica napus cv. Campino was grown in a free-air CO2 enrichment (FACE) field experiment at Stuttgart-Hohenheim (Germany) under ambient (388 ± 9 µl l-1) and elevated (494 ± 16 µl l-1) CO2 concentrations. Aboveground biomass production and energy yields of both straw and seeds increased, while energy contents per dry weight were identical in both CO2 treatments. Among the mineral concentrations in seeds, sulphur, boron and cadmium were significantly reduced and zinc and manganese were decreased by trend (0.1 ≥ P > 0.05) under CO2 enrichment. Total protein concentration declined significantly by 4.6% with CO2, although increased seed yield (+18.4%) compensated for the change on a production basis. Accordingly, several proteinogenic amino acids per unit meal weight were significantly reduced (asparagine/aspartic acid, glycine, alanine, cysteine, valine, isoleucine, leucine) or tended to decrease (glutamine/glutamic acid, methionine) in the high-CO2 treatment, resulting in higher carbon/nitrogen ratios. Amino acids on a per protein basis and total oil concentrations were unaffected, while oil yield per unit ground area tended to increase by 19.8%. Elevated CO2 slightly changed the composition of fatty acids on a per dry weight basis, which was more pronounced for unsaturated fatty acids. The concentration of major unsaturated fatty acids such as oleic acid increased significantly, while linolenic acid, nervonic acid and the group of essential fatty acids were decreased. There was also a negative trend for cis-11-eicosenic acid. The same holds true for the composition of fatty acids on a per oil basis. Among glucosinolates, only progoitrin tended to decrease under CO2 enrichment. The results indicate that elevated CO2 levels may have implications for food and feed quality and use for processing of OSR in the future.

Beteiligte Personen

Beteiligte Einrichtungen

Projekte im Rahmen der Publikation