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Effect of different Si rates and application time on winter wheat biomass Si content (%) at tillering and before harvest in 2017. Treatments are designated in the format x:y, in which x and y are the fertilizer Si rates in kg Si ha−1 applied at planting and at tillering, respectively. Bars within the same year followed by the same letter are not significantly different (p > 0.1) based on a Duncan’s multiple range test.
