Yield Performance and Nutrient Uptake of Red Rice Variety (MRM 16) at Different NPK Fertilizer Rates

Table 4

Analysis of variance (ANOVA) for grain yield, total aboveground N, P, and K uptake, and N, P, and K harvest index (NHI, PHI, and KHI).

NPK (kg/ha)	GY (kg/ha)	TNU	NHI
T1	1.94 ± 0.07a	48.0 ± 3.19a	0.5 ± 0.03a
T2	4.09 ± 0.06b	127.8 ± 1.90b	0.6 ± 0.00 b
T3	4.26 ± 0.13b	166.2 ± 7.51c	0.6 ± 0.01b
T4	4.20 ± 0.10b	170.0 ± 8.82cd	0.6 ± 0.03b
NPK (kg/ha)	GY (kg/ha)	TPU	PHI
T1	1.94 ± 0.07a	12.5 ± 0.54a	0.4 ± 0.0a
T2	4.09 ± 0.06b	27.7 ± 0.73b	0.4 ± 0.01ab
T3	4.26 ± 0.13b	31.3 ± 1.86c	0.4 ± 0.02ab
T4	4.20 ± 0.10b	31.7 ± 1.21c	0.4 ± 0.01ab
NPK (kg/ha)	GY (kg/ha)	TKU	KHI
T1	1.94 ± 0.07a	42.2 ± 1.86a	0.11 ± 0.00ab
T2	4.09 ± 0.06b	92.0 ± 2.25b	0.12 ± 0.00bc
T3	4.26 ± 0.13b	103.0 ± 6.22bc	0.12 ± 0.01 abc
T4	4.20 ± 0.10b	111.9 ± 5.13cd	0.11 ± 0.00a

Within a column, means followed by a different letter are significantly different at the 0.05 probability level according to Tukey’s significant difference test. NHI = nitrogen harvest index; PHI = phosphorus harvest index; KHI = potassium harvest index; TNU = total aboveground N; TPU = total aboveground P; TKU = total aboveground K.