TABLE 4.

The biochemical properties of the rhizosphere soils of rice under different nitrogen treatments.

Parameter	Treatment
	NT	NF
Available N (mg kg–1)	88.01 ± 1.59 b	98.28 ± 1.74 a
Available P (mg kg–1)	30.51 ± 3.54 a	28.86 ± 1.96 a
Available K (mg kg–1)	66.08 ± 2.91 b	76.54 ± 3.01 a
Urase (μg g–1 h–1)	7.15 ± 0.21 b	8.4 ± 0.32 a
Invertase (μg g–1 h–1)	25.01 ± 1.56 b	34.11 ± 3.34 a
Nitrate reductase (μg g–1 h–1)	2.35 ± 0.16 a	1.44 ± 0.08 b

Different letters in a row show significant differences determined by LSD’s test (P ≤ 0.05, n = 3), data are means ± standard errors (one-way analysis of variance).