Characteristics of Organic Acid Secretion Associated with the Interaction between Burkholderia multivorans WS-FJ9 and Poplar Root System

Table 3

Tests of Between-Subjects Effects on the 2 × 4 × 2 factorial design experiment.

Source	Type III Sum of Squares	df	Mean Square	F	Sig.
Corrected Model		15	72690.20	459.39	0.00
Intercept	860029.08	1	860029.08	5.44E3	0.00
A	512847.52	1	512847.52	3.24E3	0.00
B	119635.22	3	39878.41	252.02	0.00
C	287739.17	1	287739.17	1.82E3	0.00
A × B	26768.49	3	8922.83	56.39	0.00
A × C	112865.32	1	112865.32	713.28	0.00
B × C	30202.42	3	10067.47	63.62	0.00
A × B × C	294.81	3	98.27	0.62	0.61
Error	5063.48	32	158.23
Total	1955445.50	48
Corrected Total	1095416.42	47

A: inoculation of B. multivorans WS-FJ9; B: phosphorus content of the nutrient solutions; C: poplar root system; a: R Squared =0.995 (adjusted R Squared =0.993); dependent variable: the amounts of GA production (mg·L^–1).