Quality and Grain Yield Attributes of Rwandan Rice (Oryza sativa L.) Cultivars Grown in a Biotron Applying Two NPK Levels

Table 2

Mean mineral element content (mg·kg⁻¹ dry weight) (10²) in Rwandan rice cultivars.

Cultivar	Al	B	Ba	Ca	Cu
Ingwizabukungu	0.12 ± 0.002a	0.060 ± 0.002a	0.010 ± 0.0002a	8.6 ± 0.005ab	0.12 ± 0.010a
Intsindagirabigega	0.12 ± 0.001	0.001 ± 0.000	0.005 ± 0.0000	3.5 ± 0.000	0.06 ± 0.015
Jyambere	0.12 ± 0.001a	0.030 ± 0.001a	0.020 ± 0.0010a	14.8 ± 0.040a	0.07 ± 0.026a
Mpembuke	0.14 ± 0.007a	0.050 ± 0.002a	0.004 ± 0.0005a	5.7 ± 0.006b	0.08 ± 0.006a
Ndamirabahinzi	0.12 ± 0.001a	0.060 ± 0.006a	0.007 ± 0.0004a	5.2 ± 0.006b	0.08 ± 0.001a
Nemeyubutaka	0.14 ± 0.020a	0.040 ± 0.007a	0.020 ± 0.0006a	10.0 ± 0.012ab	0.10 ± 0.008a
Zong geng	0.13 ± 0.007	0.009 ± 0.001	0.010 ± 0.0000	6.5 ± 0.001	0.09 ± 0.001
Fertilizer dose
High	0.13 ± 0.009a	0.05 ± 0.006a	0.006 ± 0.0004b	7.1 ± 1.960b	0.09 ± 0.012a
Moderate	0.13 ± 0.003a	0.05 ± 0.007a	0.020 ± 0.0041a	11.0 ± 0.490a	0.10 ± 0.003a
Cultivar	Fe	K	Mg	Mn	Mo
Ingwizabukungu	0.18 ± 0.002a	48.2 ± 3.75ab	18.0 ± 0.16a	0.51 ± 0.012b	0.022 ± 0.002a
Intsindagirabigega	0.18 ± 0.015	32.7 ± 0.79	10.8 ± 0.19	0.15 ± 0.003	0.005 ± 0.005
Jyambere	0.19 ± 0.001a	69.8 ± 9.93a	18.1 ± 0.43a	0.41 ± 0.021c	0.007 ± 0.004a
Mpembuke	0.17 ± 0.026ab	39.2 ± 1.79b	13.5 ± 0.48b	0.17 ± 0.026d	0.008 ± 0.004a
Ndamirabahinzi	0.12 ± 0.006b	47.9 ± 3.41ab	13.4 ± 0.14b	0.14 ± 0.018d	0.012 ± 0.004a
Nemeyubutaka	0.20 ± 0.020a	57.0 ± 2.04ab	19.2 ± 0.63a	0.75 ± 0.016a	0.012 ± 0.004a
Zong geng	0.17 ± 0.004	42.6 ± 0.65	26.8 ± 0.13	0.24 ± 0.002	0.015 ± 0.001
Fertilizer dose
High	0.15 ± 0.011b	59.5 ± 0.50a	16.5 ± 0.78a	0.38 ± 0.07a	0.01 ± 0.002a
Moderate	0.19 ± 0.009a	45.4 ± 0.20b	16.4 ± 0.87a	0.41 ± 0.06a	0.01 ± 0.002a
Cultivar	Na	P	S	Zn
Ingwizabukungu	0.37 ± 0.0661a	49.3 ± 1.94ab	16.5 ± 0.47ab	0.46 ± 0.010a
Intsindagirabigega	0.17 ± 0.0005	34.1 ± 0.31	11.6 ± 0.01	0.37 ± 0.012
Jyambere	0.41 ± 0.1520a	50.9 ± 5.03a	19.8 ± 2.97a	0.38 ± 0.034ab
Mpembuke	0.28 ± 0.0591a	38.2 ± 1.34c	12.2 ± 0.61b	0.31 ± 0.094b
Ndamirabahinzi	0.45 ± 0.0321a	39.4 ± 0.60bc	13.8 ± 0.16ab	0.33 ± 0.008b
Nemeyubutaka	0.36 ± 0.0232a	50.3 ± 1.04ab	15.3 ± 0.60ab	0.41 ± 0.007a
Zong geng	0.20 ± 0.0012	29.4 ± 0.65	10.4 ± 0.07	0.32 ± 0.004
Fertilizer dose
High	0.48 ± 0.03a	48.7 ± 0.26a	17.0 ± 0.14a	0.39 ± 0.022a
Moderate	0.26 ± 0.02b	42.5 ± 0.18b	14.0 ± 0.52b	0.36 ± 0.014b

Means and standard errors per cultivar are the average at both fertilizer doses; means and standard errors per dose are the average for all cultivars. Means followed by the same letter within a column are not significantly different between cultivars or between doses according to Tukey’s test at . Mean data only for moderate fertilizer dose.