Final limb length average of Ginkgo biloba L. following 3 years of forced chilling (group one); 1 year of ambient chilling (998 hours) and 2 years of forced chilling (group two); and 2 years of ambient chilling (998 and 1,487 hours) and 1 year of forced chilling (group three).z
| Chill hoursy | Group onex | Group twox | Group threex |
|---|---|---|---|
| 100 | 45.3 a | 37.3 a | 28.6 ab |
| 200 | 37.2 ab | 39.2 a | 41.3 a |
| 300 | 41.3 ab | 36.1 a | 36.2 ab |
| 400 | 40.4 ab | 40.4 a | 34.3 ab |
| 500 | 30.4 b | 36.5 a | 28.6 ab |
| 600 | 29.4 b | 45.0 a | 38.9 ab |
| 700 | 32.7 ab | 44.5 a | 25.8 ab |
| 800 | 37.7 ab | 43.0 a | 22.3 b |
| 900 | 37.1 ab | 37.1 a | 36.0 ab |
| 1,000 | 35.5 ab | 35.1 a | 41.6 a |
| 1,100 | 41.0 ab | 43.1 a | 41.8 a |
| 1,200 | 36.1 ab | 44.8 a | 38.7 ab |
| Regression equation | NS | NS | NS |
| r | — | — | — |
| p-value | — | — | — |
↵zFinal limb length average measured in cm from trunk to tip of lateral bud, at the end of 3 years, 1999–2002.
↵yChilling was applied to each treatment at 4°C (38°F) in a cooler in 100-hour increments following 200 hours of ambient chilling to ensure dormancy prior to treatments.
↵xMeans within a column with the same letter are similar according to Duncan’s multiple range test (α = 0.05).