Table 5.

The influence of ABA, PEG, AC and maltose on plantlet survival of P. massoniana.

Medium		Factors				Survival rate (%)
number		ABA (mg/L)	PEG (g/L)	AC (g/L)	Maltose (g/L)
1		1	110	0.5	20	34.4
2		1	130	1.0	25	33.3
3		1	150	1.5	30	0
4		2	110	0.5	30	49.0
5		2	130	1.0	20	59.6
6		2	150	1.5	25	5.6
7		3	110	0.5	25	26.0
8		3	130	1.0	30	10.7
9		3	150	1.5	20	9.6
	yj1	67.7	109.4	50.7	103.6
	yj2	114.2	103.6	91.9	64.9
	yj3	46.3	15.2	85.6	59.7
	${\overline{y}}_{j1}$	22.6	36.5	16.9	34.5
	${\overline{y}}_{j2}$	38.1	34.5	30.6	21.6
	${\overline{y}}_{j3}$	15.4	5.1	28.5	19.9
	Rj	22.7	31.4	13.7	14.6
Primary and secondary factors				PEG>ABA>Maltose>AC
Optimal concentration				ABA2+PEG1+AC2+Maltose1

ABA, abscisic acid; PEG, polyethylene glycol 8000; AC, activated carbon. y_jk (k=1, 2, 3) is the sum of test results with the same level of k in the j_th column of the table; ${\overline{y}}_{jk}$ is the mean value of the test results with the same level of k in the j_th column of the table; R_j is the range of ${\overline{y}}_{jk}$ . R_j=max( ${\overline{y}}_{jk}$ )- min( ${\overline{y}}_{jk}$ ).