Table 5. Changes in the geometric mean of the assayed enzyme activities (Gmea), hydrolase (GH) and oxidase (GOR) under different fertilization treatments.

	Gmea	GH	GOR	GH/GOR
0N	4.83 ± 0.28 c	6.08 ± 0.53 c	2.73 ± 0.07 a	2.23 ± 0.23 d
100IN	5.24 ± 0.45 c	6.96 ± 0.80 c	2.59 ± 0.11 a	2.69 ± 0.30 cd
75IN/25ON	6.17 ± 0.55 b	8.62 ± 1.02 b	2.69 ± 0.12 a	3.20 ± 0.38 bc
50IN/50ON	6.94 ± 0.07 b	10.03 ± 0.14 b	2.76 ± 0.09 a	3.64 ± 0.15 b
25IN/75ON	8.47 ± 0.65 a	13.45 ± 1.37 a	2.67 ± 0.07 a	5.04 ± 0.44 a

Data are means ± S.E., n = 3. Different lowercase letters indicate significant differences among different treatments at the P < 0.05 level.