TABLE 4.

Activity levels of carbon (C)-, nitrogen (N)-, and phosphorus (P)-acquiring enzymes in rhizosphere and bulk soil samples subjected to the three nitrogen (N) fertilization levels.

	N treatment levels	BG (IU g–1)	NAG (IU g–1)	LAP (IU g–1)	ACP (IU g–1)
	N0	8.84 ± 0.21a	54.54 ± 0.35c	33.69 ± 0.38a	6.90 ± 0.28cd
Rhizosphere samples	N150	8.91 ± 0.12a	58.75 ± 1.61b	31.91 ± 0.97b	6.73 ± 0.21d
	N300	7.88 ± 0.21b	61.84 ± 2.63a	28.23 ± 0.48d	8.80 ± 0.23a
	N0	7.78 ± 0.14b	44.83 ± 1.14e	29.6 ± 0.93c	7.47 ± 0.11b
Bulk soil samples	N150	7.11 ± 0.19c	39.45 ± 0.76f	28.17 ± 0.58d	7.39 ± 0.13b
	N300	6.64 ± 0.11d	50.03 ± 1.21d	24.63 ± 0.79e	7.21 ± 0.09bc

BG, 1,4-β-glucosidase; NAG, 1,4-β-N-acetylglucosaminidase; LAP, leucine aminopeptidase; ACP, acid phosphatase. Different lowercase letters after one data point indicate significant differences at p < 0.05.