Table 1.
The meteorological index over three growing seasons at the planting area
| Item | Meteorological index1 | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| May | June | July | August | September | October | ||
| 2012 | Sunshine duration (h) | 285.4 | 167.6 | 219.4 | 249.7 | 218.5 | 247.2 |
| Temperature (°C) | 17.8 | 19.3 | 23.3 | 21.4 | 15.1 | 7.7 | |
| Relative humidity (%) | 43 | 73 | 69 | 67 | 65 | 55 | |
| Rainfall (mm) | 28.1 | 153.3 | 107.2 | 44.4 | 41 | 33.1 | |
| 2013 | Sunshine duration (h) | 276.5 | 170.2 | 245.4 | 221.7 | 198.2 | 206 |
| Temperature (°C) | 17.8 | 20.3 | 23.4 | 22.7 | 15.2 | 7.7 | |
| Relative humidity (%) | 44 | 68 | 69 | 69 | 69 | 66 | |
| Rainfall (mm) | 13.2 | 83.6 | 102.4 | 104 | 49.7 | 43.6 | |
| 2014 | Sunshine duration (h) | 267.1 | 241.5 | 235.6 | 243.7 | 206.6 | 169.2 |
| Temperature (°C) | 16.2 | 20.6 | 23.9 | 20.8 | 15.4 | 8.6 | |
| Relative humidity (%) | 46 | 63 | 63 | 68 | 68 | 64 | |
| Rainfall (mm) | 65.2 | 80.9 | 94.6 | 164 | 67.3 | 33.9 | |
1
All of these meteorological data were collected from the local meteorological bureau.