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

Table 5

Changes in yield, yield attributes, and water productivity of PMK (R) 3 rice by split root experiment.

Irrigation treatments	Panicle number (no. Plant^−1)	Spikelet number (no. Plant^−1)	Filled grain percentage	1000 grain weight (g)	Grain yield (g plant^−1)	Water productivity (kg grain m^−3 of water)
PRI1	13 ± 0.5^ab	1222 ± 23.7^a	92.8 ± 0.3^ab	27.3 ± 0.36^bc	27.1 ± 0.60^ab	0.69 ± 0.018^c
PRI2	12 ± 0.3^bc	1171 ± 26.9^a	90.9 ± 0.5^b	28.0 ± 0.34^ab	26.8 ± 1.26^abc	0.85 ± 0.040^b
PRI3	14 ± 0.6^a	1249 ± 22.5^a	94.2 ± 1.1^a	28.8 ± 0.31^a	29.9 ± 0.79^a	1.18 ± 0.035^a
PRI4	11 ± 0.5^c	949 ± 27.9^b	85.9 ± 1.2^c	26.4 ± 0.47^c	23.8 ± 1.58^cd	1.21 ± 0.069^a
PRI5	8 ± 0.4^d	796 ± 45.2^c	83.0 ± 0.8^d	25.1 ± 0.36^d	21.9 ± 1.19^de	1.06 ± 0.057^a
PRI6	5 ± 0.5^e	583 ± 52.8^d	79.7 ± 0.5^e	23.6 ± 0.43^e	19.6 ± 0.63^e	1.03 ± 0.033^a
Control	12 ± 0.3^bc	1144 ± 48.5^a	91.9 ± 0.8^ab	28.3 ± 0.53^ab	26.6 ± 0.95^bc	0.22 ± 0.007^d
Mean	10	1016	88.4	26.8	25.1	0.86
S.E.	0.66	56.7	1.17	0.60	1.59	0.062
CD (0.05)	1.39	119.1	2.45	1.27	3.34	0.129
CD (0.01)	1.90	163.1	3.35	1.74	4.58	0.177

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.