<p>Si<sub>0</sub>: no Si fertilizer; Si<sub>1</sub>: slag fertilizer applied at a rate of 187 mg plant-available Si per kg soil; Si<sub>2</sub>: slag fertilizer applied at a rate of 560 mg plant-available Si per kg soil; Si<sub>3</sub>: slag fertilizer applied at a rate of 935 mg plant-available Si per kg soil; H: slag fertilizer H, Q: slag fertilizer Q; Data are means ± SD of three replicates; mean values followed by different letters (a, b, c) are significantly different (<i>P</i>≤0.05).</p
