The treatments were: 1)
without spraying of Si-fertilizer and 2) with spraying of Si-fertilizer began when sugarcane 3 months old (8 times spraying), with
consentration of 4.3 g/L. Experiment ended at the age of 10 months for PS881 and 12 months for BL. Spraying tends to produce
a yield that is different from unsprayed cane.