Effects of rock lithology and soil nutrients on nitrogen and phosphorus mobility in trees in non-karst and karst forests of southwest China

•The rock lithology had significant effect on soil TN and TP and foraging and resorption for N and P.•Karst soil TN and TP was higher than that of non-karst soil, but leaves showed the opposite trend.•The foraging, transportation and resorption were adjusted according to different soil conditions.