Table 3 Effects of irrigation time on grain yield, yield components and water use efficiency in winter wheat. Different letters indicate significant difference in treatments at P < 0.05 level. Y, year; I, irrigation time. *** indicate significant effects at P < 0.001, respectively; ns indicates no significant effect. Values are means ± standard error (n = 3). ANOVA, analysis of variance; WUE, water use efficiency.
Year | Treatment | Spike number (× 104 ha−1) | Grain numbers per spike | 1000-grain weight(g) | Grain yield (kg ha−1) | WUE (kg ha-1 mm−1) |
|---|---|---|---|---|---|---|
2018–2019 | L3 | 700.7 b | 34.3 a | 30.5 d | 6692.7 b | 16.5 |
L4 | 740.3 a | 33.1 a | 32.7 c | 7644.2 a | 19.5 a | |
L5 | 676.5 b | 31.5 ab | 34.1 b | 6601.6 b | 17.3 b | |
L6 | 594.0 c | 28.8 b | 37.9 a | 5884.0 c | 16.1 c | |
2019–2020 | L3 | 779.9 ab | 29.3 a | 35.5 d | 7436.9 ab | 16.6 b |
L4 | 818.4 a | 27.5 a | 37.5 c | 7631.3 a | 17.6 a | |
L5 | 726.0 bc | 26.3 ab | 41.1 b | 7259.3 b | 17.0 b | |
L6 | 676.5 c | 23.3 b | 43.6 a | 6012.9 c | 14.4 c | |
2020–2021 | L3 | 674.3 ab | 35.3 a | 34.7 d | 7626.6 b | 17.6 b |
L4 | 699.6 a | 34.4 ab | 36.2 c | 8233.3 a | 19.5 a | |
L5 | 632.5 bc | 33.4 ab | 38.3 b | 7555.4 b | 18.1 b | |
L6 | 600.6 c | 30.5 b | 40.7 a | 6518.8 c | 16.5 c | |
ANOVA | Year (Y) | *** | *** | *** | *** | *** |
Irrigation time(I) | *** | *** | *** | *** | *** | |
Y × I | ns | ns | *** | *** | *** |
