Table 4. Changes in total acidity of shiitake mushroom substrate (SMS) during the fermentation period

Day	Total acidity (%)
	CG1)	L	M	H
0	0.61±0.022)aC3)	0.57±0.02aB	0.46±0.05bC	0.44±0.03bD
3	1.66±0.18aA	1.49±0.37aA	1.37±0.21aA	1.29±0.10aA
7	1.24±0.16aB	0.67±0.20bB	0.88±0.22bB	0.69±0.05bBC
14	1.08±0.14abB	0.63±0.08bB	1.18±0.41aAB	0.84±0.21abB
21	0.43±0.09aC	0.45±0.07aB	0.38±0.05aC	0.51±0.07aCD

CG, control group; L, low, FB-5 0.001% inoculation; M, mild, FB-5 0.1% inoculation; H, high, FB-5 10% inoculation.
All values are mean±SD (n=3).
Different letters lowercase (^a,b) for dates, uppercase (^A-D) for samples indicate significant differences (p<0.05) by Duncan’s multiple range test.