Effects of Short-Day and Gibberellic Acid Treatments on Summer Vegetative Propagation of Napier Grass (Pennisetum purpureum Schumach)

Figure 1

Changes in height of the uppermost expanded leaves in dwarf (DL) Napier grass for 5 weeks after treatment (Exp. 1). Treatment: control (C), short-day (SD), and foliar spray of gibberellin acid (GA₃), followed by SD (GA-SD). An arrow indicates the date of the start of treatment. Figures with different letters indicate the significant difference at the same date by the Bonferroni test at the 5% level.

(a) 5-day treatment

(b) 10-day treatment

(c) 20-day treatment