Table 1.
Summary of diversity indices for all studied samples.
| Group | Sampling regions | Samples | Effective Tags | No. of OTUs | Shannon | Chao1 | Simpson | Good’s coverage | ACE | Numbers of initial colonies (log CFU/mL) |
|---|---|---|---|---|---|---|---|---|---|---|
| Z1 | Yangling | SX1 | 64,648 | 111 | 3.25 | 103.87 | 0.84 | 100.00% | 108.65 | 2.47 ± 0.02 |
| SX11 | 71,135 | 162 | 2.90 | 135.78 | 0.80 | 100.00% | 142.84 | 2.46 ± 0.01 | ||
| Shangluo | SX2 | 63,674 | 274 | 4.07 | 285.42 | 0.89 | 99.90% | 293.21 | 3.40 ± 0.01 | |
| SX21 | 70,765 | 316 | 4.02 | 287.5 | 0.85 | 99.90% | 294.04 | 3.41 ± 0.02 | ||
| Yanan | SX3 | 67,696 | 152 | 3.11 | 150.12 | 0.81 | 100.00% | 153.64 | 3.10 ± 0.02 | |
| SX31 | 74,798 | 135 | 2.12 | 129.79 | 0.61 | 100.00% | 134.66 | 2.87 ± 0.04 | ||
| Z2 | Fenyang | S1 | 69,111 | 235 | 4.18 | 230.12 | 0.91 | 99.90% | 243.33 | 2.47 ± 0.01 |
| S11 | 66,884 | 177 | 2.80 | 174.62 | 0.71 | 99.90% | 180.70 | 3.45 ± 0.02 | ||
| Zuoquan | S2 | 65,369 | 172 | 1.50 | 208.00 | 0.36 | 99.90% | 217.57 | 2.91 ± 0.02 | |
| S21 | 58,762 | 149 | 2.14 | 147.10 | 0.64 | 100.00% | 150.33 | 2.98 ± 0.02 | ||
| Licheng | S3 | 60,511 | 167 | 2.76 | 159.14 | 0.73 | 100.00% | 161.47 | 2.93 ± 0.01 | |
| S31 | 58,779 | 167 | 3.03 | 154.50 | 0.79 | 100.00% | 157.88 | 3.12 ± 0.02 | ||
| Z3 | Handan | HB1 | 66,109 | 226 | 3.07 | 230.69 | 0.78 | 99.90% | 233.43 | 3.36 ± 0.03 |
| HB11 | 59,317 | 224 | 2.81 | 212.58 | 0.70 | 99.90% | 224.48 | 2.51 ± 0.02 | ||
| Yanshan | HB2 | 68,866 | 268 | 3.67 | 257.24 | 0.87 | 99.90% | 266.80 | 3.26 ± 0.01 | |
| HB21 | 68,471 | 196 | 3.26 | 182.73 | 0.83 | 99.90% | 185.33 | 2.45 ± 0.02 | ||
| Z4 | Dali | YN1 | 66,955 | 217 | 3.95 | 372.73 | 0.89 | 99.90% | 390.80 | 3.48 ± 0.01 |
| YN11 | 62,216 | 268 | 4.33 | 275.00 | 0.89 | 99.90% | 280.90 | 3.44 ± 0.01 | ||
| Dayao | YN2 | 63,206 | 240 | 3.99 | 273.68 | 0.89 | 99.90% | 279.32 | 3.49 ± 0.01 | |
| YN21 | 67,420 | 308 | 3.26 | 195.78 | 0.81 | 99.90% | 210.25 | 3.43 ± 0.01 | ||
| Z5 | Aksu | XJ1 | 69,596 | 207 | 2.71 | 210.03 | 0.67 | 99.90% | 215.49 | 3.45 ± 0.01 |
| XJ11 | 72,364 | 230 | 3.94 | 237.00 | 0.90 | 99.90% | 260.28 | 3.09 ± 0.01 | ||
| Hetian | XJ2 | 66,670 | 286 | 3.87 | 286.60 | 0.89 | 99.90% | 289.19 | 3.31 ± 0.02 | |
| XJ21 | 69,273 | 255 | 3.50 | 248.69 | 0.82 | 99.90% | 253.76 | 3.26 ± 0.01 | ||
| Z6 | Guangyuan | SC1 | 68,211 | 369 | 3.95 | 211.17 | 0.90 | 99.90% | 223.75 | 2.45 ± 0.01 |
| SC11 | 65,657 | 282 | 3.78 | 247.45 | 0.85 | 99.90% | 252.48 | 2.46 ± 0.01 | ||
| Ganzi | SC2 | 69,974 | 274 | 3.53 | 254.20 | 0.82 | 99.90% | 264.86 | 2.44 ± 0.01 | |
| SC21 | 71,128 | 197 | 4.21 | 284.61 | 0.90 | 99.90% | 300.92 | 3.13 ± 0.01 |
Microbial counts of walnuts samples were the means of two replicates, expressed as log CFU/mL. All the samples with “1, 2, and 3” represent the walnuts harvested in 2015; all the samples with “11, 21, and 31” represent the fresh walnuts in 2016.