Table 8.
Visual estimates of injury to rice and rice yields following different herbicide treatments at Ji’ning (JN) and Shi’zui’shan (SZS) in 2017.
| Treatments (g a.i. ha−1) | Crop injurya,b | Rice yield (SE)b | Yield growth rate (SE)b | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3DAT | 5DAT | 10DAT | 20DAT | JN | SZS | JN | SZS | |||||
| JN | SZS | JN | SZS | JN | SZS | JN | SZS | |||||
| % | kg ha−1 | % | ||||||||||
| QYR301 (90) | 0 b | 0 | 0 b | 0 | 0 b | 0 | 0 | 0 | 4290 (236) d | 10830 (124) d | 6.3 (5.9) c | 5.9 (1.2) d |
| QYR301 (135) | 0 b | 0 | 0 b | 0 | 0 b | 0 | 0 | 0 | 4575 (111) bc | 11160 (218) c | 13.4 (2.8) b | 9.1 (2.1) c |
| QYR301 (180) | 0 b | 0 | 0 b | 0 | 0 b | 0 | 0 | 0 | 4710 (76) ab | 11820 (154) b | 16.7 (1.9) ab | 15.5 (1.5) b |
| QYR301 (270) | 4.0 a | 0 | 5.8 a | 0 | 1.5 a | 0 | 0 | 0 | 4770 (127) a | 11925 (235) ab | 18.2 (3.1) ab | 16.6 (2.3) ab |
| Penoxsulam (30) | 0 b | 0 | 0 b | 0 | 0 b | 0 | 0 | 0 | 4525 (82) c | 10260 (201) e | 12.1 (2.0) b | 0.3 (2.0) e |
| Hand weeding | — | — | — | — | — | — | — | — | 4855 (143) e | 12155 (164) e | 20.3 (2.6) a | 18.8 (1.2) a |
| Weedy control | — | — | — | — | — | — | — | — | 4035 (104) a | 10230 (119) a | — | — |
aVisual crop injury was evaluated at 3, 5, 10, and 20 d after treatment (DAT) with the scale of 0 to 100%, where 0% represents no injury and 100% represents plant death. bDifferent letters are significantly different at the P < 0.05 level according to Fisher’s protected LSD test.