Table 4.
Approximate effects of the topological input parameters on STAR values with a GAM
| Year | Input variable | e.d.f. | F | P-value | R2 |
|---|---|---|---|---|---|
| 1 | sl l–1 | 3·51 | 12·53 | 1·31 × 10–8*** | 0·58 |
| sm l–1 | 2·13 | 7·98 | 1·68 × 10–4*** | ||
| ss l–1 | 1·00 | 2·55 | 0·113833 | ||
| pl l–1 | 1·00 | 3·66 | 0·058766 | ||
| pm l–1 | 1·00 | 1·83 | 0·178819 | ||
| ps l–1 | 1·92 | 3·01 | 0·044906* | ||
| 2 | sl l–1 | 2·34 | 16·85 | 8·87 × 10–9*** | 0·57 |
| sm l–1 | 1·00 | 11·44 | 0·00104** | ||
| ss l–1 | 1·00 | 0·26 | 0·61205 | ||
| pl l–1 | 1·36 | 0·19 | 0·77948 | ||
| pm l–1 | 3·14 | 7·82 | 1·97 × 10–5*** | ||
| ps l–1 | 1·20 | 0·04 | 0·90516 | ||
| 3 | sl l–1 | 2·15 | 20·61 | 1·4 × 10–9*** | 0·54 |
| sm l–1 | 1·84 | 1·77 | 0·17187 | ||
| ss l–1 | 6·31 | 1·06 | 0·39947 | ||
| pl l–1 | 4·02 | 0·99 | 0·42864 | ||
| pm l–1 | 3·96 | 3·96 | 0·00307** | ||
| ps l–1 | 1·57 | 0·57 | 0·55967 | ||
| 4 | sl l–1 | 2·20 | 20·32 | 8·54 × 10–10*** | 0·53 |
| sm l–1 | 1·82 | 2·71 | 0·0649 | ||
| ss l–1 | 1·00 | 1·66 | 0·2008 | ||
| pl l–1 | 1·00 | 1·19 | 0·2773 | ||
| pm l–1 | 3·99 | 3·06 | 0·0138* | ||
| ps l–1 | 1·00 | 0·001 | 0·9780 | ||
| 5 | sl l–1 | 1·90 | 21·32 | 2·22 × 10–9*** | 0·42 |
| sm l–1 | 1·00 | 1·72 | 0·1927 | ||
| ss l–1 | 1·00 | 0·002 | 0·9652 | ||
| pl l–1 | 2·56 | 1·28 | 0·2869 | ||
| pm l–1 | 1·37 | 3·63 | 0·0386* | ||
| ps l–1 | 1·00 | 0·000 | 0·9877 |
Input variables were the number of types of sylleptic and proleptic shoots, long (sl and pl), medium (sm and pm) and short (ss and ps), respectively, per unit length (l–1).
*** P ≤ 0·001; **P ≤ 0·01; *P ≤ 0·05.