Table 6.

Total antioxidant (FRAP) activity in different parts of L. pumila under different nitrogen levels. BHT, α-tocopherol and vitamin C were used as positive controls.

Nitrogen levels	Extract source	FRAP a
0 kg N/ha	Leaves	890.3 ± 11.2 c
	Stems	870.1 ± 13.5 c
	Roots	810.2 ± 21.3 c
90 kg N/ha	Leaves	768.0 ± 27.9 d
	Stems	713.8 ± 34.5 d
	Roots	701.4 ± 78.1 d
180 kg N/ha	Leaves	617.3 ± 24.7 e
	Stems	589.2 ± 11.3 e
	Roots	534.1 ± 23.3 e
270 kg N/ha	Leaves	435.2 ± 24.1 f
	Stems	412.3 ± 11.2 f
	Roots	399.4 ± 24.5 f
Controls	BHT	81.3 ± 56.3 g
	α-tocopherol	953.0 ± 45.6 b
	Vitamin C	3301.2 ± 34.6 a

All analyses are mean ± standard error of mean (SEM); N = 18. Means not sharing a common single letter are significantly different at P ≤ 0.05.

^aResults expressed in percent of free radical inhibition.