Table 4. Detection of active chemicals in Alpinia officinarum Hance rhizomes and active chemical-based sample groupings.

	Volatile oil (mg/100g)	Galangin (mg/g)	Groupings
QJ-RZ	10.44±0.75c	12.95±0.19c	Sub-high
HA-RZ	2.98±0.53a	5.13±0.47a	Low
HN-RZ	3.36±0.18a	5.56±1.09a	Low
GZ-RZ	9.96±0.94c	11.66±0.76c	Sub-high
GY-RZ	7.68±0.24b	9.62±0.65b	Intermediate
GX-RZ	7.28±0.50b	9.76±0.46b	Intermediate
KM-RZ	7.92±0.15b	9.27±0.34b	Intermediate
FJ-RZ	7.75±0.27b	8.88±0.23b	Intermediate
LT-4-RZ	14.65±0.71d	16.89±0.24d	High
LT-3-RZ	10.10±0.39c	12.89±0.14c	Sub-high
LT-2-RZ	7.09±0.26b	9.88±0.35b	Intermediate
LT-1-RZ	3.06±0.08a	5.42±0.62a	Low

Values are expressed as the mean ± SD for measurements of three independent rhizome samples for each year or site. The letters in each lane indicate significant differences (p<0.05).