Table 6.
Effect of steaming time and species of sawdust on mineral elements

Species of sawdust	Steaming time (min)	Mineral elements (mg/kg, dry weight)
		K	Ca	Mg	Na	Zn	Fe	Mn	P
Pine sawdust	0	389.1 ± 23.3c*	516.7 ± 2.8b	111.6 ± 0.6b	264.7 ± 2.4d	16.0 ± 0.1c	105.3 ± 1.6c	102.9 ± 1.8b	45.7 ± 1.8c
	10	394.7 ± 12.5c	513.3 ± 2.5b	119.8 ± 0.8b	309.8 ± 2.4b	24.5 ± 0.3a	134.9 ± 1.8b	107.2 ± 1.5a	46.0 ± 1.1c
	20	515.6 ± 17.4a	559.0 ± 6.0ab	132.5 ± 12.3a	600.1 ± 6.0a	20.8 ± 0.3b	137.8 ± 1.5a	109.5 ± 0.4a	49.2 ± 0.7b
	30	466.1 ± 2.1b	665.8 ± 11.8a	136.0 ± 2.4a	298.5 ± 4.8c	11.8 ± 0.1d	30.4 ± 0.7d	107.6 ± 1.3a	51.9 ± 0.9a
Oak sawdust	0	998.0 ± 10.4c	1196.0 ± 20.8c	105.6 ± 2.0b	296.7 ± 5.6b	9.4 ± 0.0a	165.7 ± 0.3a	15.3 ± 0.0b	60.5 ± 0.3c
	10	912.0 ± 24.1d	1431.1 ± 18.1b	94.6 ± 1.2c	469.6 ± 6.6a	4.4 ± 0.0b	70.6 ± 0.5b	14.7 ± 0.1c	62.1 ± 0.3b
	20	1135.3 ± 10.1b	1110.9 ± 20.1d	106.5 ± 1.9b	301.3 ± 1.9b	3.6 ± 0.0c	52.9 ± 0.3c	16.6 ± 0.1a	69.4 ± 0.8a
	30	1176.6 ± 8.3a	1527.4 ± 31.4a	112.6 ± 2.0a	255.8 ± 2.3c	3.1 ± 0.0d	17.2 ± 0.1d	12.0 ± 0.0d	69.9 ± 0.5a

Mean separation within columns each species by Duncan’s multiple range test at p = 0.05