Table 2.

Effect of biochar addition and N fertilizer reduction on total N content and uptake of rice straw and grain.

	Nitrogen content (g/kg)		Nitrogen uptake (g/pot)
Treatment	Rice straw	Rice grain	Rice straw	Rice grain	Total
Control	4.39 ± 0.01 c	18.20 ± 0.10 cd	0.36 ± 0.03 b	0.73 ± 0.03 d	1.09 ± 0.06 d
N160	4.36 ± 0.18 c	18.58 ± 0.36 bcd	0.50 ± 0.05 b	1.35 ± 0.03 c	1.85 ± 0.02 c
N160 + BC	4.54 ± 0.27 c	18.08 ± 0.54 d	0.54 ± 0.03 b	1.27 ± 0.02 c	1.81 ± 0.02 c
N200	4.40 ± 0.09 c	20.39 ± 0.68 a	0.65 ± 0.07 b	1.90 ± 0.46 b	2.56 ± 0.53 b
N200 + BC	6.15 ± 1.69 b	20.19 ± 0.21 a	1.64 ± 0.46 a	2.94 ± 0.09 a	4.57 ± 0.37 a
N240	4.15 ± 0.09 c	19.34 ± 1.25 abc	0.71 ± 0.22 b	1.59 ± 0.13 bc	2.30 ± 0.08 bc
N240 + BC	7.29 ± 0.08 a	19.63 ± 0.48 ab	1.76 ± 0.27 a	2.75 ± 0.18 a	4.52 ± 0.38 a

Data in the table are mean ± standard deviation (n = 3); different lowercase letters in the same column indicate significant differences between treatments (p < 0.05).