Fig. 3 Link between soil stoichiometry and enzyme stoichiometry in different land use patterns. The fitting curves of C:N ratio and enzyme C:N ratio at 0-20cm, 20-40cm and 40-60cm were shown as (a), (b) and (c) respectively. The fitting curves of C:P ratio and enzyme C:P ratio at 0-20cm, 20-40cm and 40-60cm were shown as (d), (e) and (f) respectively. The fitting curves of C:N ratio and enzyme C:N ratio at 0-20cm, 20-40cm and 40-60cm were shown as (g), (h) and (i) respectively. C: carbon. N: nitrogen. P: phosphorus.