Clonal Propagation of Khaya senegalensis: The Effects of Stem Length, Leaf Area, Auxins, Smoke Solution, and Stockplant Age

Table 4

Interactions between stockplant donors and Indole-3-butyric acid (IBA) treatments with respect to the length of the longest root and the number of secondary roots per rooted cutting of Khaya senegalensis. Means ± SE (standard error) followed by the same letter(s) are not significantly different at the 5% level according to Tukey’s multiple comparison test.

Stockplant	IBA (ppm)	Longest root; length (cm)	No. secondary roots
Seedlings	0	3.30 ± 0.34a	4.9 ± 0.7ab
	2500	3.30 ± 0.22a	5.2 ± 0.6ab
	5000	3.48 ± 0.39a	5.2 ± 0.8ab
	10000	3.10 ± 0.24ab	4.2 ± 0.6ab
5-month resprouts*	0	1.15 ± 0.55bc	0.3 ± 0.3b
	2500	2.08 ± 0.70abc	3.1 ± 1.8ab
	5000	3.56 ± 1.33a	3.5 ± 2.0ab
	10000	3.88 ± 1.37a	8.8 ± 3.8a
5-year old trees	0	0.50 ± 0.00c	00b
	2500	0.75 ± 0.35c	00b
	5000	—	—
	10000	—	—

*Young sprouts of 100-year-old pollarded trees.