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The Scientific World Journal
Volume 2015 (2015), Article ID 245072, 6 pages
Research Article

Silicon Improves Maize Photosynthesis in Saline-Alkaline Soils

1College of Life Sciences, Baicheng Normal University, Baicheng 137000, China
2Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
3College of Agronomy, Jilin Agricultural University, Changchun 130118, China
4Key Laboratory of Coastal Biology & Bioresources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences (CAS), Yantai 264003, China
5School of Urban and Environmental Science, Huaiyin Normal University, Huai’an 223300, China

Received 10 June 2014; Accepted 26 June 2014

Academic Editor: Marian Brestic

Copyright © 2015 Zhiming Xie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The research aimed to determine the effects of Si application on photosynthetic characteristics of maize on saline-alkaline soil, including photosynthetic rate (), stomatal conductance (), transpiration rate (E), and intercellular CO2 concentration () of maize in the field with five levels (0, 45, 90, 150, and 225 kg·ha−1) of Si supplying. Experimental results showed that the values of , , and of maize were significantly enhanced while the values of E of maize were dramatically decreased by certain doses of silicon fertilizers, which meant that Si application with proper doses significantly increased photosynthetic efficiency of maize in different growth stages under stressing environment of saline-alkaline soil. The optimal dose of Si application in this experiment was 150 kg·ha−1 Si. It indicated that increase in maize photosynthesis under saline-alkaline stress took place by Si application with proper doses, which is helpful to improve growth and yield of maize.