Table 1 Location, climatic conditions, and description of five clonal trials
Site | Latitude, °N | Longitude, °W | Mean annual, T (°C) | Rainfall, mm/year | Planting spacing, m | Numbers of clones | Sample trees |
|---|---|---|---|---|---|---|---|
Yanzhou | 33° 10′ | 116° 49′ | 13.6 | 660 | 2 × 3 | 9 | 54 |
Gaotang | 36° 51′ | 116° 04′ | 13.1 | 556 | 2 × 3 | 9 | 54 |
Xiangfen | 35° 50′ | 111° 21′ | 11.5 | 550 | 2 × 3 | 9 | 54 |
Zhengzhou | 34° 72′ | 113° 97′ | 14.2 | 641 | 2 × 3 | 9 | 54 |