Table 2 The fitted logistic equation and parameters during grain filling-stage of the two rice varieties in 2016 and 2017 growing seasons
Year | Variety | Fitted equation | Correlation coefficient R2 | Grain filling rate (mg grain−1 d−1) | The maximum rate | The grain-filling duration | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Initial | Maximum | Mean | Gradual | Rapid | Slowly | Time (d) | Accumulation (mg grain−1 d−1) | Gradual | Rapid | Slowly | Sum | ||||
2016 | LLY996 | Y = 20.14/(1 + EXP(2.41–0.299X)) | 0.981** | 0.455 | 1.505 | 0.860 | 1.16 | 1.32 | 0.65 | 8.1 | 10.13 | 3.7 | 8.8 | 4.5 | 17.0 |
LLY268 | Y = 18.89/(1 + EXP(1.71–0.395X)) | 0.983** | 0.909 | 1.752 | 1.112 | 3.75 | 1.61 | 0.65 | 4.6 | 9.95 | 1.1 | 7.1 | 3.8 | 11.9 | |
2017 | LLY996 | Y = 21.40/(1 + EXP(2.93–0.210X)) | 0987** | 0.216 | 1.124 | 0.597 | 0.59 | 0.99 | 0.49 | 14.0 | 10.75 | 7.7 | 12.5 | 6.4 | 26.6 |
LLY268 | Y = 18.11/(1 + EXP(2.87–0.245X)) | 0.988** | 0.225 | 1.109 | 0.594 | 0.60 | 0.97 | 0.49 | 11.7 | 9.04 | 6.3 | 10.8 | 5.4 | 22.5 | |