3.1 Variation in alpine desert SOC and TN and TP in Qinghai Plateau.
Averaged SOC was approximate 4.86 ± 0.26 g/kg with high variation coefficient around 81.14% in Qaidam Basin (Table 1). Median value of SOC was 3.80 g/kg and ranged from 0.54 to 24.34 g/kg with 15 outlier values over 11.2 g/kg (Figure 2).
Mean total nitrogen was around 4.62 ± 0.25 g/kg with much high variation coefficient around 82.95% (Table 1). Median value of total nitrogen was 3.64 g/kg ranging from 0.67 to 27.69 g/kg with 17 extreme outlier values over 10.0 g/kg. Mean and median value of total phosphorus were 5.20 ± 0.09 and 5.45 g/kg with low variation coefficient ranging from1.81 to 10.67 (Figure 2).