Table 1 The air temperature from January to March at Changsha, Hunan province, China in 2008, 2010, and 2011 (°C)
From: Studies on the cold tolerance of ratoon ‘Chaling’ common wild rice
Year | Month | A period of ten days | ①ADTmean (°C) | ②ADTmin. (°C) | ③ADTmax. (°C) | ④Tmin. (°C) | ⑤Tmax. (°C) |
|---|---|---|---|---|---|---|---|
2008 | Jan. | Early | 8.38 | 4.09 | 14.43 | − 0.9 | 19.5 |
Middle | 0.29 | − 0.28 | 1.42 | − 1.8 | 7.8 | ||
Late | − 1.43 | − 1.96 | − 0.52 | − 3.2 | 1.5 | ||
Feb. | Early | 1.46 | − 1.20 | 4.89 | − 4.7 | 7.3 | |
Middle | 6.18 | 2.82 | 10.30 | − 0.9 | 15.0 | ||
Late | 9.17 | 5.56 | 14.64 | 1.4 | 23.0 | ||
March | Early | 13.01 | 8.89 | 19.07 | 7.3 | 23.7 | |
Middle | 16.75 | 13.90 | 21.55 | 11.9 | 27.0 | ||
Late | 15.71 | 12.27 | 20.12 | 9.4 | 27.2 | ||
2010 | Jan. | Early | 5.06 | 3.00 | 8.49 | − 1.7 | 16.2 |
Middle | 7.97 | 4.38 | 13.01 | − 0.1 | 22.1 | ||
Late | 6.79 | 5.38 | 8.97 | 1.6 | 12.7 | ||
Feb. | Early | 7.21 | 6.13 | 9.03 | 3.4 | 15.5 | |
Middle | 3.80 | 1.44 | 7.02 | − 1.3 | 17.8 | ||
Late | 16.64 | 12.20 | 23.21 | 6.9 | 30.6 | ||
March | Early | 5.12 | 3.31 | 8.29 | − 1.1 | 21.2 | |
Middle | 16.74 | 12.11 | 22.5 | 3.9 | 28.6 | ||
Late | 15.23 | 11.56 | 19.88 | 7.0 | 26.4 | ||
2011 | Jan. | Early | 1.28 | − 0.17 | 3.29 | − 2.2 | 5.2 |
Middle | 2.41 | 0.57 | 5.14 | − 2.7 | 9.5 | ||
Late | 2.41 | 0.58 | 4.47 | − 1.4 | 7.7 | ||
Feb. | Early | 9.92 | 5.41 | 16.66 | 0.2 | 24.3 | |
Middle | 5.84 | 3.55 | 9.16 | 0.9 | 14.8 | ||
Late | 10.61 | 8.13 | 14.68 | 3.0 | 22.3 | ||
March | Early | 8.35 | 5.65 | 12.21 | 0.8 | 19.4 | |
Middle | 11.73 | 8.85 | 16.19 | 4.1 | 20.1 | ||
Late | 12.48 | 8.97 | 16.78 | 5.9 | 24.4 |