Figure 3

C (a), N (b) and P (c) remaining of the litter of mixed roots from dominant species on the Qinghai-Tibet Plateau and the effects of root absence/presence and N addition. C, control; N, nitrogen addition. All data were expressed as % of original litter C, N and P content. Bars show mean ± SE (n = 12 for C and N remaining and n = 24 for P remaining).