Quality and Grain Yield Attributes of Rwandan Rice (Oryza sativa L.) Cultivars Grown in a Biotron Applying Two NPK Levels
Table 3
Heavy metal content (mg·kg−1 dry weight) (10) in Rwandan rice cultivars.
Cultivar
As
Cd
Co
Cr
Ingwizabukungu
0.006 ± 0.0001bc
0.013 ± 0.0011ab
0.003 ± 0.0001a
0.060 ± 0.006a
Intsindagirabigega
0.008 ± 0.0000
0.005 ± 0.0000
0.001 ± 0.0000
0.038 ± 0.004
Jyambere
0.010 ± 0.0001a
0.017 ± 0.0020a
0.002 ± 0.0000ab
0.034 ± 0.002ab
Mpembuke
0.005 ± 0.0004bc
0.003 ± 0.0004c
0.002 ± 0.0004ab
0.021 ± 0.001b
Ndamirabahinzi
0.004 ± 0.0000c
0.005 ± 0.0008bc
0.001 ± 0.0000b
0.030 ± 0.004ab
Nemeyubutaka
0.008 ± 0.0005b
0.012 ± 0.0011ab
0.002 ± 0.0001ab
0.040 ± 0.002ab
Zong geng
0.010 ± 0.0000
0.003 ± 0.0000
0.001 ± 0.0000
0.023 ± 0.001
Fertilizer dose
High
0.006 ± 0.0003a
0.012 ± 0.0012a
0.002 ± 0.0001a
0.035 ± 0.0002a
Moderate
0.007 ± 0.0003a
0.008 ± 0.0006b
0.002 ± 0.0001a
0.039 ± 0.0003a
Cultivar
Ni
Pb
Se
Ingwizabukungu
0.18 ± 0.021a
0.016 ± 0.0017a
0.003 ± 0.0003a
Intsindagirabigega
0.20 ± 0.002
0.008 ± 0.0002
0.002 ± 0.0000
Jyambere
0.17 ± 0.016a
0.016 ± 0.0028a
0.002 ± 0.0000a
Mpembuke
0.14 ± 0.025a
0.007 ± 0.0009a
0.002 ± 0.0001a
Ndamirabahinzi
0.17 ± 0.022a
0.009 ± 0.0008a
0.002 ± 0.0002a
Nemeyubutaka
0.12 ± 0.012a
0.012 ± 0.0016a
0.002 ± 0.0001a
Zong geng
0.11 ± 0.002
0.006 ± 0.0001
0.002 ± 0.0000
Fertilizer dose
Moderate
0.16 ± 0.010a
0.008 ± 0.0011b
0.002 ± 0.0000a
High
0.15 ± 0.010a
0.015 ± 0.0006a
0.002 ± 0.00001a
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
