Isolation and identification of a new biocontrol bacteria against Salvia miltiorrhiza root rot and optimization of culture conditions for antifungal substance production using response surface methodology

Table 2 Factors and levels of CCD

Factors	Level
	-1.682	-1	0	+ 1	+ 1.682
A: medium volume (ml)	43	50	60	70	77
B: initial pH	4.3	5.0	6.0	7.0	7.7
F: fermentation temperature (°C)	21.6	25	30	35	38.4

ISSN: 1471-2180