Fig. 2
Effects of different root promoters on the agronomic traits of tobacco at 30 and 60 days post-transplanting. The agronomic traits measured include (a) plant height, (b) stem circumference, (c) number of effective leaves, and (d) maximum leaf area. PH, potassium humate; HIEC, hymexazol and isorothiolane emulsifiable concentrate; CS, chitosan; CG, control group. Data are presented as mean ± standard deviation (n = 3). Different lowercase letters above the bars indicate significant differences between treatments at the same time point (one-way ANOVA followed by Duncan’s multiple range test, p < 0.05).
