Effects of free-air CO2 enrichment (FACE) on the uptake and utilization of N, P and K in Vigna radiata

Li, Ping and Han, Xue and Zong, Yuzheng and Li, Hongying and Lin, Erda and Han, Yuanhuai and Hao, Xingyu (2015) Effects of free-air CO2 enrichment (FACE) on the uptake and utilization of N, P and K in Vigna radiata. Agriculture, Ecosystems and Environment, 202. pp. 120-125. ISSN 0167-8809


Elevated [CO2] stimulates plant growth, which in turn demands more nutrients to sustain it. The nutrient demand of N-fixing plants may differ from that of other plants under elevated [CO2]. We conducted an experiment to determine how elevated [CO2] affected N, P and K content, assimilation of nutrients and accumulation of metabolites in the legume mung bean [Vigna radiata L.]. We investigated the effect of 550�±19 µmolmol-1[CO2] on N, P, K uptake and utilization by mung bean at the free-air carbon dioxide
enrichment (FACE) experimental facility in north China. At maturity, N concentration in whole plants decreased by 4.4%, but P and K concentrationwas unchanged at elevated [CO2]. The weight of nodules per plant significantly increased at elevated [CO2] but N, P, K-use efficiency for seed and the ratio of seed yield to cumulative absorption of N, P and K was unaffected. These results indicate that under elevated [CO2] the mechanisms governing N absorption and metabolism in mung beanwas different from that for P and
K. The nutrient dynamics between different elements of overall plant biomass and the soil nutrients pool could, therefore, be changed in future by elevated [CO2].

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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: 02 Jun 2016 06:16
Last Modified: 08 Jun 2017 06:13
Uncontrolled Keywords: free-air carbon dioxide enrichment (FACE); elevated [CO2]; biomass; NPK nutrient uptake; utilization of NPK; mung bean
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.2015.01.004
URI: http://eprints.usq.edu.au/id/eprint/28896

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