Fig. 7
Soil amylase and urease activities in the 0-10, 10-20, and 20–40 cm soil layers at different levels of N addition in August 2020. CK, 0 g/m2; N5, 5 g/m2; N10, 10 g/m2; N15, 15 g/m2. Lowercase letters represent significant differences between treatments (P<0.05).
