Table 1.
The growth index of Haloxylon ammodendron with different stand ages.
| Stand age | Longitude | Latitude | Altitude/m | Crown breadth/cm | Diameter/cm | Plant height/cm |
|---|---|---|---|---|---|---|
| 5 | 102°45′59” | 39°25′57” | 1,211 | 62.67 ± 7.88a × 71.00 ± 4.58a | 2.05 ± 0.44a | 70.33 ± 2.33a |
| 11 | 102°47′05” | 39°25′43” | 1,191 | 142.50 ± 15.88b × 170.00 ± 11.55b | 9.85 ± 1.41b | 166.00 ± 8.72b |
| 22 | 102°47′38” | 39°25′48” | 1,183 | 175.00 ± 2.89bc × 211.67 ± 8.33b | 11.76 ± 0.72bc | 181.67 ± 6.01b |
| 34 | 102°47′48” | 39°23′10” | 1,178 | 208.33 ± 13.64c × 216.67 ± 23.33b | 13.92 ± 0.41bc | 265.00 ± 14.36c |
| 46 | 102°46′02” | 39°24′39” | 1,195 | 366.67 ± 36.67d × 330.00 ± 35.12c | 16.83 ± 1.95c | 396.67 ± 3.33d |
The statistics are mean value ± SE (standard error); different letters denote significant differences at the 0.05 level.