Xie Zhiming, Song Ri, Shao Hongbo, Song Fengbin, Xu Hongwen, Lu Yan
College of Life Sciences, Baicheng Normal University, Baicheng 137000, China ; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China.
College of Agronomy, Jilin Agricultural University, Changchun 130118, China.
ScientificWorldJournal. 2015;2015:245072. doi: 10.1155/2015/245072. Epub 2015 Jan 5.
The research aimed to determine the effects of Si application on photosynthetic characteristics of maize on saline-alkaline soil, including photosynthetic rate (P n ), stomatal conductance (g s ), transpiration rate (E), and intercellular CO2 concentration (C i ) 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 P n, g s, and C i 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.
该研究旨在确定施硅对盐碱地玉米光合特性的影响，包括田间条件下五个施硅水平（0、45、90、150和225 kg·ha⁻¹）的玉米光合速率（Pn）、气孔导度（gs）、蒸腾速率（E）和胞间二氧化碳浓度（Ci）。实验结果表明，一定剂量的硅肥显著提高了玉米的Pn、gs和Ci值，同时显著降低了玉米的E值，这意味着在盐碱土胁迫环境下，适当剂量的施硅显著提高了玉米不同生育期的光合效率。本实验中硅的最佳施用量为150 kg·ha⁻¹。这表明在盐碱胁迫下，适当剂量的施硅可提高玉米的光合作用，有助于改善玉米的生长和产量。
