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Table 1 Summary of the characteristics of the sample plots. [N40°E], [N10°E], and [N20°E] where N is the reference direction, and 40°E is the deviation from the reference direction heading east. SWC, soil moisture content; BD, soil bulk density; TN, soil total nitrogen content; TP, soil total phosphorus content; DBH, diameter at breast height; pH, hydrogen ion concentration. Values are the mean ± standard deviation (SD). Different lowercase letters (a, b, and c) indicate significant differences (P < 0.05) between different stand density levels. 27a, 27-year-old stand; 36a, 36-year-old stand; 48a, 48-year-old stand

From: Effects of stand density on soil respiration and labile organic carbon in different aged Larix principis-rupprechtii plantations

Stand age Aspect Stand density (trees/ha) Elevation (m) Slope (°) DBH (cm) Height (m) Stand density level SWC (%) BD (g/cm3 ) pH TN (g/kg) TP (g/kg)
27a [N10°E] 975 1854 13 18.79±3.09 14.38±1.45 LD 39.62±3.03a 1.03±0.02a 6.99±0.13a 2.23±0.21a 0.78±0.01a
1100 1860 14 18.16±2.86 14.43±1.32
1250 1865 12 18.23±2.10 13.69±1.09
1500 1860 12 18.09±2.05 14.77±0.87 MD 40.17±1.64a 1.02±0.02a 7.13±0.15a 2.40±0.11b 0.82±0.06a
1675 1864 11 17.86±2.36 13.73±1.99
1825 1870 12 18.01±3.10 14.24±1.84
2125 1868 10 17.15±2.21 13.85±2.01 HD 34.46±2.57b 1.08±0.07a 7.05±0.09a 2.22±0.04a 0.77±0.01a
2300 1880 18 15.87±2.77 13.44±1.38
2425 1885 14 16.26±2.03 14.04±3.32
36a [N40°E] 525 2030 18 24.60±3.65 17.15±2.13 LD 34.68±4.42a 1.12±0.04a 6.92±0.07a 3.05±0.37a 0.87±0.02a
750 2050 13 22.57±2.56 16.93±1.34
925 2054 20 21.92±3.14 16.62±1.66
1100 2043 15 20.41±2.42 15.98±2.07 MD 31.74±7.59ab 1.08±0.04a 7.1±0.13a 3.75±0.70b 0.92±0.03a
1325 2052 12 19.96±3.77 16.49±1.83
1500 2063 15 20.89±2.75 16.03±1.98
1550 2073 16 19.71±3.01 15.76±2.61 HD 28.84±3.49b 1.07±0.05a 6.91±0.13a 3.42±0.17ab 0.85±0.06a
1700 2066 16 18.12±3.16 16.08±2.15
2075 2070 17 18.37±2.98 16.36±1.97
48a [N20°E] 400 2122 13 29.41±3.28 19.45±2.13 LD 30.02±3.16a 1.12±0.04a 6.78±0.15a 3.17±0.29a 0.9±0.08a
600 2128 15 29.78±3.43 18.93±1.34
725 2140 26 27.52±3.27 18.62±3.66
875 2160 18 28.06±2.54 18.58±2.07 MD 32.17±3.24a 1.08±0.07a 7.03±0.10a 3.15±0.42a 0.92±0.11a
975 2162 12 27.16±3.00 18.49±2.83
1150 2159 12 26.94±2.98 17.93±2.98
1350 2154 13 24.10±2.81 18.14±2.51 HD 25.28±0.92b 1.19±0.11a 7.00±0.07a 2.53±0.51a 1.48±0.41b
1475 2136 16 23.58±2.76 17.91±2.36
1625 2140 15 21.03±2.56 17.85±1.73