Preliminary Investigation on Crop Growth, Physiology, and Yield of Rice under Partial Root-Zone Irrigation

Table 3

Root traits changes of PMK (R) 3 rice by split root experiment.

Irrigation treatments	Total root length (m hill^−1)	Root surface area (cm^2 hill^−1)	Average root diameter (mm)	Root volume (cm^3 hill^−1)
PRI1	4.71 ± 0.16^ab	1287 ± 61.1^b	0.95 ± 0.03^b	0.58 ± 0.02^a
PRI2	4.26 ± 0.10^bc	1191 ± 47.0^b	0.91 ± 0.02^b	0.56 ± 0.01^a
PRI3	4.89 ± 0.12^ab	1455 ± 82.5^a	0.83 ± 0.02^b	0.60 ± 0.02^a
PRI4	4.03 ± 0.13^c	931 ± 49.7^c	0.74 ± 0.01^c	0.51 ± 0.01^bc
PRI5	3.20 ± 0.14^d	750 ± 28.5^d	0.65 ± 0.02^c	0.43 ± 0.02^c
PRI6	2.42 ± 0.14^e	650 ± 32.2^d	0.58 ± 0.03^d	0.37 ± 0.01^d
Control	3.99 ± 0.19^c	1234 ± 39.4^b	1.04 ± 0.04^a	0.55 ± 0.02^a
Mean	3.93	1070.9	0.81	0.51
SE	0.216	77.3	0.040	0.022
CD (0.05)	0.455	162.3	0.085	0.047
CD (0.01)	0.623	222.4	0.116	0.064

Changes in rice root length, surface area, root diameter, and volume are shown at different partial root-zone irrigation treatments. Values indicate the mean of eight plants; ± indicates standard error of the mean; letters indicate significant differences among means according to Student’s t-test. CD represents the critical difference at 95% (0.05) and 99% (0.01) confidence limit.