Table 2 Maximum temperature, minimum temperature and solar radiation during the rice-growing season from sowing to maturity of ratoon rice in 2017–2020.
Cultivar | Year | SW-HDa | HD-MH | MH-HDR | HDR-RH |
|---|---|---|---|---|---|
Maximum temperature (°C) | |||||
HHZ & JNSM b | 2017 | 25.9 | 35.2 | 33.0 | 26.7 |
2018 | 27.5 | 34.1 | 34.6 | 24.3 | |
2019 | 26.0 | 31.1 | 33.3 | 27.1 | |
2020 | 26.9 | 30.7 | 33.8 | 24.6 | |
Mean | 26.6 | 32.8 | 33.7 | 25.7 | |
NY103 & RY1015 | 2017 | 26.3 | 35.6 | 31.6 | 22.9 |
2018 | 27.6 | 35.1 | 31.2 | 21.5 | |
2019 | 26.1 | 32.1 | 31.8 | 24.9 | |
2020 | 27.0 | 32.4 | 30.8 | 20.8 | |
Mean | 26.7 | 33.8 | 31.3 | 22.5 | |
Minimum temperature (°C) | |||||
HHZ & JNSM | 2017 | 18.0 | 26.2 | 24.6 | 21.0 |
2018 | 19.0 | 25.6 | 25.3 | 20.1 | |
2019 | 18.4 | 23.9 | 24.4 | 20.2 | |
2020 | 18.5 | 24.1 | 24.7 | 19.8 | |
Mean | 18.5 | 24.9 | 24.7 | 20.2 | |
NY103 & RY1015 | 2017 | 18.4 | 26.2 | 23.8 | 18.4 |
2018 | 19.4 | 25.5 | 23.8 | 17.3 | |
2019 | 18.6 | 24.7 | 23.5 | 18.3 | |
2020 | 18.8 | 25.0 | 22.8 | 17.1 | |
Mean | 18.8 | 25.3 | 23.5 | 17.8 | |
Solar radiation (MJ m−2 d−1) | |||||
HHZ & JNSM | 2017 | 17.1 | 19.4 | 17.3 | 12.2 |
2018 | 18.1 | 18.8 | 18.5 | 10.6 | |
2019 | 16.2 | 17.2 | 17.8 | 13.4 | |
2020 | 17.4 | 16.2 | 18.1 | 11.1 | |
Mean | 17.2 | 17.9 | 17.9 | 11.8 | |
NY103 & RY1015 | 2017 | 17.0 | 19.7 | 15.9 | 10.0 |
2018 | 16.2 | 18.8 | 15.6 | 9.5 | |
2019 | 15.7 | 17.4 | 16.4 | 12.2 | |
2020 | 16.9 | 17.2 | 16.1 | 8.9 | |
Mean | 16.5 | 18.3 | 16.0 | 10.2 | |
