Effects of open-air elevated atmospheric CO2 concentration on yield quality of soybean (Glycine max (L.) Merr)

Hao, Xingyu and Gao, Ji and Xue, Han and Ma, Zhanyu and Merchant, Andrew and Ju, Hui and Li, Ping and Yang, Wanshen and Gao, Zhiqiang and Lin, Erda (2014) Effects of open-air elevated atmospheric CO2 concentration on yield quality of soybean (Glycine max (L.) Merr). Agriculture, Ecosystems and Environment, 192. pp. 80-84. ISSN 0167-8809

Abstract

Investigations across the world have elucidated common chemical and physiological responses of plants to the influence of elevated atmospheric CO2 concentration ([CO2]). Focus is now turning to the influence of elevated [CO2] on yield quality among a number of globally important crops including soybean (Glycine max (L.) Merr). Soybean cv. Zhonghuang 35 was grown in a free-air CO2 enrichment (FACE) field experiment at Changping-Beijing (China) under ambient (415±16 µmol mol−1) and elevated(550±19 µmol mol−1) CO2 concentrations. Results showed that elevated [CO2] increased the yields of soybean seeds (g m−2) by 26% and 31% respectively, in 2009 and 2011. Total protein concentration in seeds was significantly reduced by 3.3% under CO2 enrichment, but oil concentration increased by 2.8%. Accordingly, most proteinogenic amino acid concentrations were significantly reduced under elevated [CO2], whilst two fatty acids (linoleic acid and palmitic acid) increased in concentration. The protein and oil yield per unit ground area increased by 24.5% and 32.0%, respectively. Results indicate that whilst future elevated atmospheric [CO2] may improve the oil quantity of soybean, corresponding reductions in the nutritive value are likely to occur.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 29 Jul 2016 00:57
Last Modified: 29 Jul 2016 00:57
Uncontrolled Keywords: free-air carbon dioxide enrichment (FACE); quality protein; amino acids; fatty acids; soybean
Fields of Research : 05 Environmental Sciences > 0599 Other Environmental Sciences > 059999 Environmental Sciences not elsewhere classified
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079999 Agricultural and Veterinary Sciences not elsewhere classified
Socio-Economic Objective: D Environment > 96 Environment > 9603 Climate and Climate Change > 960399 Climate and Climate Change not elsewhere classified
Identification Number or DOI: 10.1016/j.agee.2014.04.002
URI: http://eprints.usq.edu.au/id/eprint/28894

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