Table 4.

Correlations between silicon concentration in different agronomic traits, grain yield, and yield components of three rice varieties grown in soil culture with six rates of Si fertilizer (0, 50, 100, 150, 200, and 300 kg/ha) under waterlogged conditions. The concentration of Si in different agronomic traits was analyzed at the maturity stage.

	Si Concentration (% Dry Weight)
	Flag Leaf	Husk	Straw
Grain yield (g/plant)	0.66 **	0.48 *	0.42 ns
Straw dry weight (g/plant)	0.91 **	0.04 ns	0.19 ns
Filled grain (%)	0.65 **	0.60 **	0.08 ns
Number of tillers/plant	0.37 ns	0.30 ns	0.44 ns
Number of panicles/plant	0.40 ns	0.29 ns	0.41 ns

ns = not significant, * = significant at p < 0.05, ** = significant at p < 0.05.