Does the Short Term Fluctuation of Mineral Element Concentrations in the Closed Hydroponic Experimental Facilities Affect the Mineral Concentrations in Cucumber Plants Exposed to Elevated CO₂?

Authors

Xun Li
Jinlong Dong
Nazim Gruda
Wenying Chu, Old Dominion UniversityFollow
Zengqiang Duan

Document Type

Article

Publication Date

2021

DOI

10.1007/s11104-021-04993-y

Publication Title

Plant and Soil

Volume

465

Issue

1-2

Pages

125-141

Abstract

Aims

Studies dealing with plants’ mineral nutrient status under elevated atmospheric CO₂concentration (eCO₂) are usually conducted in closed hydroponic systems, in which nutrient solutions are entirely renewed every several days. Here, we investigated the contribution of the fluctuation of concentrations of N ([N]), P ([P]), and K ([K]) in nutrient solutions in this short period on their concentrations in cucumber plants exposed to different [CO₂] and N levels.

Methods

Cucumber (Cucumis sativus L.) plants were hydroponically grown under two [CO₂] and three N levels. [N], [P], and [K] in nutrient solutions and cucumber plants were analyzed.

Results

The transpiration rate (Tr) was significantly inhibited by eCO₂, whereas Tr per plant was increased due to the larger leaf area. Elevated [CO₂] significantly decreased [N] in low N nutrient solutions, which imposed an additional decrease in [N] in plants. [P] in nutrient solutions fluctuated slightly, so the change of [P] in plants might be attributed to the dilution effect and the demand change under eCO₂. [K] in moderate and high N nutrient solutions were significantly decreased, which exacerbated the [K] decrease in plants under eCO₂.

Conclusions

The short-term fluctuation of [N] and [K] in nutrient solutions is caused by the asynchronous uptakes of N, K, and water under eCO₂, which has an appreciable influence on [N] and [K] in plants besides the dilution effect. This defect of the closed hydroponic system may let us exaggerate the negative impact of eCO₂ itself on [N] and [K] in plants.

Comments

Correction available at: https://doi.org/10.1007/s11104-021-05050-4 The original article posted here includes the correction.

© 2021 The Authors

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Original Publication Citation

Li, X., Dong, J., Gruda, N. Chu, W. & Duan, Z. (2021) Does the short-term fluctuation of mineral element concentrations in the closed hydroponic experimental facilities affect the mineral concentrations in cucumber plants exposed to elevated CO₂?. Plant and Soil, 465(1-2), 125–141. https://doi.org/10.1007/s11104-021-04993-y

Repository Citation

Li, Xun; Dong, Jinlong; Gruda, Nazim; Chu, Wenying; and Duan, Zengqiang, "Does the Short Term Fluctuation of Mineral Element Concentrations in the Closed Hydroponic Experimental Facilities Affect the Mineral Concentrations in Cucumber Plants Exposed to Elevated CO₂?" (2021). Chemistry & Biochemistry Faculty Publications. 205.
https://digitalcommons.odu.edu/chemistry_fac_pubs/205