Coapplication of Chicken Litter Biochar and Urea Only to Improve Nutrients Use Efficiency and Yield of Oryza sativa L. Cultivation on a Tropical Acid Soil

Table 7

Effects of biochar and nitrogen fertilization on measured variables of rice plants in the pot study.

Treatment	T1	T2	T3	T4	T5	T6	T7	T8
Plant height (cm)	76.20^d  ±  1.17	86.48^c  ±  0.48	98.38^a  ±  1.13	98.08^a  ±  0.79	94.80^ab  ±  0.76	93.15^b  ±  0.46	88.05^c  ±  1.02	80.05^d  ±  1.07
	hill^−1
Number of tillers	6.0^e  ±  0.10	12^c  ±  0.29	15^a  ±  0.25	16^a  ±  0.29	13^b  ±  0.48	13^bc  ±  0.41	12^c  ±  0.29	10^d  ±  0.25
Number of leaves	8^f  ±  1.44	66^c  ±  1.29	81^a  ±  0.85	78^ab  ±  0.65	73^ab  ±  1.25	75^b  ±  0.65	57^c  ±  1.38	38^e  ±  0.65
	g hill^−1
Root dry weight	3.11^d  ±  0.26	10.63^bc  ±  0.57	14.55^a  ±  0.40	11.58^b  ±  0.08	11.74^b  ±  0.07	10.94^b  ±  0.04	9.28^c  ±  0.22	9.24^c  ±  0.60
Dry matter yield	5.86^c  ±  0.51	23.15^c  ±  0.84	33.81^a  ±  0.32	33.55^a  ±  0.50	31.57^a  ±  0.75	27.37^b  ±  1.06	23.54^c  ±  0.21	16.31^d  ±  0.38

Different letters within a row indicate significant difference between means of four replicates ± standard error using Tukey’s test at ≤ 0.05.