| Region | Sample Number | S A-K (mg・kg−1) | R A-K (mg・kg−1) | ||
| Range | Average | Range | Average | ||
| XZ | 42 | 230 - 1340 | 595 | 46 - 352 | 134 |
| LX | 11 | 340 - 730 | 545 | 106 - 200 | 141 |
| GD | 13 | 390 - 920 | 618 | 68 - 292 | 151 |
| NG | 8 | 390 - 800 | 601 | 106 - 320 | 185 |
| JX | 19 | 250 - 690 | 485 | 58 - 224 | 128 |
| JXX | 10 | 230 - 950 | 622 | 46 - 352 | 136 |
| JD | 21 | 450 - 1340 | 810 | 46 - 158 | 105 |
| All | 124 | 230 - 1340 | 595 | 46 - 352 | 134 |