Rice Science ›› 2018, Vol. 25 ›› Issue (5): 286-292.DOI: 10.1016/j.rsci.2018.08.003
收稿日期:2017-08-11
接受日期:2018-03-21
出版日期:2018-09-28
发布日期:2018-06-11
. [J]. Rice Science, 2018, 25(5): 286-292.
Fig. 1. Different sowing patterns in the experimental design.Control, Plowed soil without vegetation cover; DVC, Unplowed soil with dead vegetation cover; LVC, Unplowed soil with live vegetation cover; MVC, Unplowed soil with mixed vegetation cover.
Fig. 2. Influence of tillage and direct seeding on NERICA sprouting rate.
| Variety | Treatment | Time (week) | Regression equation for plant height (cm) | R2 | Time (week) | Regression equation for number of leaves per plant | R2 |
|---|---|---|---|---|---|---|---|
| NERICA 3 | Control | - | Y = 5.01e^0.32x | 0.98 | - | Y' = 3.3x - 1.24 | 0.99 |
| DVC | - | Y = 5.17e^0.31x | 0.99 | - | Y' = 3.3x - 1.24 | 0.99 | |
| LVC | - | Y = 5.25e^0.31x | 0.98 | 4-7 | Y' = 2.73e^0.23x (*) | 0.98 | |
| MVC | - | Y = 5.71e^0.23x | 0.98 | 4-7 | Y' = 2.06e^0.24x (*) | 0.94 | |
| NERICA 8 | Control | - | Y = 5.41e^0.31x | 0.98 | - | Y' = 5x - 5.04 | 0.97 |
| DVC | 10 | Y = 5.49e^0.32x (**) | 0.98 | 4-10 | Y' = 4.02x - 2.31 (*) | 0.97 | |
| LVC | - | Y = 5.95e^0.27x | 0.99 | 4-7 | Y' = 2.3e^0.24x (**) | 0.96 | |
| MVC | - | Y = 6.61e^0.27x | 0.98 | 4-7 | Y' = 2.38e^0.24x (**) | 0.99 |
Table 1 Relationship between plant height (Y) or number of leaves per plant (Y′) and time after sowing of rice.
| Variety | Treatment | Time (week) | Regression equation for plant height (cm) | R2 | Time (week) | Regression equation for number of leaves per plant | R2 |
|---|---|---|---|---|---|---|---|
| NERICA 3 | Control | - | Y = 5.01e^0.32x | 0.98 | - | Y' = 3.3x - 1.24 | 0.99 |
| DVC | - | Y = 5.17e^0.31x | 0.99 | - | Y' = 3.3x - 1.24 | 0.99 | |
| LVC | - | Y = 5.25e^0.31x | 0.98 | 4-7 | Y' = 2.73e^0.23x (*) | 0.98 | |
| MVC | - | Y = 5.71e^0.23x | 0.98 | 4-7 | Y' = 2.06e^0.24x (*) | 0.94 | |
| NERICA 8 | Control | - | Y = 5.41e^0.31x | 0.98 | - | Y' = 5x - 5.04 | 0.97 |
| DVC | 10 | Y = 5.49e^0.32x (**) | 0.98 | 4-10 | Y' = 4.02x - 2.31 (*) | 0.97 | |
| LVC | - | Y = 5.95e^0.27x | 0.99 | 4-7 | Y' = 2.3e^0.24x (**) | 0.96 | |
| MVC | - | Y = 6.61e^0.27x | 0.98 | 4-7 | Y' = 2.38e^0.24x (**) | 0.99 |
| Variety | Treatment | No. of panicles per hill | No. of spikelets per panicle | 1000-grain weight (g) | Dry matter content (%) | Yield (t/hm2) |
|---|---|---|---|---|---|---|
| NERICA3 | Control | 16 ± 5 | 143.7 ± 54.6 | 32.08 ± 0.02 | 50.44 ± 19.27 | 3.05 ± 0.82 |
| DVC | 17 ± 4 | 89.3 ± 23.0 | 31.65 ± 0.01 | 40.43 ± 4.78 | 2.62 ± 0.88 | |
| LVC | 15 ± 2 | 88.7 ± 42.4 | 29.74 ± 0.03 | 53.87 ± 9.42 | 2.42 ± 1.42 | |
| MVC | 15 ± 7 | 50.2 ± 43.8 | 30.28 ± 0.03 | 42.88 ± 3.88 | 2.16 ± 1.50 | |
| Mean | 16 ± 5 a | 93.0 ± 40.9 a | 30.94 ± 0.02 a | 46.91 ± 9.33 a | 2.50 ± 1.40 a | |
| NERICA8 | Control | 20 ± 5 | 43.4 ± 14.7 | 27.83 ± 0.01 | 33.51 ± 6.04 | 1.21 ± 0.95 |
| DVC | 14 ± 2 | 44.1 ± 10.9 | 28.52 ± 0.01 | 33.88 ± 8.12 | 1.02 ± 0.40 | |
| LVC | 16 ± 7 | 25.2 ± 14.5 | 24.65 ± 0.06 | 32.61 ± 2.04 | 0.71 ± 0.21 | |
| MVC | 19 ± 3 | 30.5 ± 1.8 | 30.31 ± 0.03 | 37.26 ± 3.85 | 0.93 ± 0.34 | |
| Mean | 17 ± 4 a | 35.8 ± 10.4 b | 27.83 ± 0.03 b | 34.32 ± 5.01 b | 0.97 ± 0.59 b | |
| Cultivation system | ns | ns | ns | ns | ns | |
| Variety | ns | *** | * | ** | * | |
| Cultivation system × variety | ns | ns | ns | ns | ns | |
Table 2 Yield traits of NERICA 3 and NERICA 8.
| Variety | Treatment | No. of panicles per hill | No. of spikelets per panicle | 1000-grain weight (g) | Dry matter content (%) | Yield (t/hm2) |
|---|---|---|---|---|---|---|
| NERICA3 | Control | 16 ± 5 | 143.7 ± 54.6 | 32.08 ± 0.02 | 50.44 ± 19.27 | 3.05 ± 0.82 |
| DVC | 17 ± 4 | 89.3 ± 23.0 | 31.65 ± 0.01 | 40.43 ± 4.78 | 2.62 ± 0.88 | |
| LVC | 15 ± 2 | 88.7 ± 42.4 | 29.74 ± 0.03 | 53.87 ± 9.42 | 2.42 ± 1.42 | |
| MVC | 15 ± 7 | 50.2 ± 43.8 | 30.28 ± 0.03 | 42.88 ± 3.88 | 2.16 ± 1.50 | |
| Mean | 16 ± 5 a | 93.0 ± 40.9 a | 30.94 ± 0.02 a | 46.91 ± 9.33 a | 2.50 ± 1.40 a | |
| NERICA8 | Control | 20 ± 5 | 43.4 ± 14.7 | 27.83 ± 0.01 | 33.51 ± 6.04 | 1.21 ± 0.95 |
| DVC | 14 ± 2 | 44.1 ± 10.9 | 28.52 ± 0.01 | 33.88 ± 8.12 | 1.02 ± 0.40 | |
| LVC | 16 ± 7 | 25.2 ± 14.5 | 24.65 ± 0.06 | 32.61 ± 2.04 | 0.71 ± 0.21 | |
| MVC | 19 ± 3 | 30.5 ± 1.8 | 30.31 ± 0.03 | 37.26 ± 3.85 | 0.93 ± 0.34 | |
| Mean | 17 ± 4 a | 35.8 ± 10.4 b | 27.83 ± 0.03 b | 34.32 ± 5.01 b | 0.97 ± 0.59 b | |
| Cultivation system | ns | ns | ns | ns | ns | |
| Variety | ns | *** | * | ** | * | |
| Cultivation system × variety | ns | ns | ns | ns | ns | |
| Variety | Treatment | Total protein content (%) | Total soluble carbohydrate (%) |
|---|---|---|---|
| NERICA 3 | Control | 4.28 ± 0.16 D | 3.58 ± 0.03 C |
| DVC | 7.91 ± 0.19 A | 3.55 ± 0.04 C | |
| LVC | 7.05 ± 0.12 C | 5.55 ± 0.25 AB | |
| MVC | 7.49 ± 0.24 B | 3.22 ± 0.05 C | |
| Mean | 6.68 ± 1.49 a | 3.97 ± 0.97 b | |
| NERICA 8 | Control | 2.31 ± 0.15 F | 3.96 ± 0.07 C |
| DVC | 4.52 ± 0.17 D | 5.09 ± 0.03 B | |
| LVC | 3.54 ± 0.17 E | 6.86 ± 0.84 A | |
| MVC | 3.68 ± 0.03 F | 6.23 ± 0.31 A | |
| Mean | 3.52 ± 0.84 b | 5.53 ± 2.38 a | |
| Cultivation system | *** | *** | |
| Variety | *** | *** | |
| Cultivation system × variety | *** | *** | |
Table 3 Total protein and soluble carbohydrates of NERICA 3 and NERICA 8.
| Variety | Treatment | Total protein content (%) | Total soluble carbohydrate (%) |
|---|---|---|---|
| NERICA 3 | Control | 4.28 ± 0.16 D | 3.58 ± 0.03 C |
| DVC | 7.91 ± 0.19 A | 3.55 ± 0.04 C | |
| LVC | 7.05 ± 0.12 C | 5.55 ± 0.25 AB | |
| MVC | 7.49 ± 0.24 B | 3.22 ± 0.05 C | |
| Mean | 6.68 ± 1.49 a | 3.97 ± 0.97 b | |
| NERICA 8 | Control | 2.31 ± 0.15 F | 3.96 ± 0.07 C |
| DVC | 4.52 ± 0.17 D | 5.09 ± 0.03 B | |
| LVC | 3.54 ± 0.17 E | 6.86 ± 0.84 A | |
| MVC | 3.68 ± 0.03 F | 6.23 ± 0.31 A | |
| Mean | 3.52 ± 0.84 b | 5.53 ± 2.38 a | |
| Cultivation system | *** | *** | |
| Variety | *** | *** | |
| Cultivation system × variety | *** | *** | |
| PH | NL | DMC | Yield | TSC | |
|---|---|---|---|---|---|
| NL | 0.53** | ||||
| DMC | -0.01 | -0.37 | |||
| Yield | 0.40 | 0.02 | 0.71*** | ||
| TSC | -0.29 | -0.42* | 0.16 | -0.03 | |
| Protein | 0.12 | -0.36 | 0.37 | 0.33 | -0.019 |
Table 4 Correlation matrix of the measured variables on NERICA.
| PH | NL | DMC | Yield | TSC | |
|---|---|---|---|---|---|
| NL | 0.53** | ||||
| DMC | -0.01 | -0.37 | |||
| Yield | 0.40 | 0.02 | 0.71*** | ||
| TSC | -0.29 | -0.42* | 0.16 | -0.03 | |
| Protein | 0.12 | -0.36 | 0.37 | 0.33 | -0.019 |
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