Table 1.
Comparisons of parameter values and coefficient of variation (CV) among PPDs and years
| Parameters | Year |
Population density |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2005 |
2006 |
Low density |
Regular density |
High density |
||||||
| Mean ± s.d. | CV | Mean ± s.d. | CV | Mean ± s.d. | CV | Mean ± s.d. | CV | Mean ± s.d. | CV | |
| Ps | 0·88 ± 0·02 | 2·3 | 0·87 ± 0·07 | 8·0 | 0·86 ± 0·01 | 1·2 | 0·93 ± 0·03 | 3·2 | 0·85 ± 0·04 | 4·7 |
| Pe | 1·82 ± 0·23 | 12·6** | 1·57 ± 0·21 | 13·4* | 1·94 ± 0·20 | 10·3 | 1·63 ± 0·16 | 9·8 | 1·51 ± 0·17 | 11·3 |
| Pf | 202·90 ± 95·16 | 46·9* | 182·20 ± 77·80 | 42·7** | 290·05 ± 28·14 | 9·7 | 162·18 ± 12·49 | 7·7 | 125·42 ± 3·39 | 2·7 |
| Pm | 1·39 ± 0·13 | 9·4 | 1·23 ± 0·11 | 8·9 | 1·42 ± 0·14 | 9·9 | 1·33 ± 0·09 | 6·8 | 1·19 ± 0·11 | 9·2 |
| Bb | 0·47 ± 0·02 | 4·3 | 0·55 ± 0·02 | 3·6 | 0·51 ± 0·05 | 9·8 | 0·53 ± 0·05 | 9·4 | 0·49 ± 0·05 | 10·2 |
| Bs | 0·70 ± 0·03 | 4·3 | 0·73 ± 0·01 | 1·4 | 0·71 ± 0·04 | 5·6 | 0·70 ± 0·03 | 4·3 | 0·73 ± 0·01 | 1·4 |
| Be | 0·85 ± 0·03 | 3·5 | 0·89 ± 0·02 | 2·2 | 0·86 ± 0·08 | 9·3 | 0·88 ± 0·01 | 1·1 | 0·87 ± 0·02 | 2·3 |
| Bf | 0·59 ± 0·03 | 5·1 | 0·57 ± 0·02 | 3·5 | 0·59 ± 0·03 | 5·1 | 0·58 ± 0·04 | 6·9 | 0·58 ± 0·02 | 3·4 |
| r | 295·82 ± 34·91 | 11·8** | 324·18 ± 35·66 | 11·0** | 275·13 ± 19·26 | 7·0 | 309·36 ± 20·42 | 6·6 | 345·52 ± 20·39 | 5·9 |
| Sp | 0·22 ± 0·09 | 40·9** | 0·24 ± 0·09 | 37·5** | 0·30 ± 0·03 | 10·0 | 0·23 ± 0·02 | 8·7 | 0·13 ± 0·01 | 7·7 |
Po is the coefficient of sink strength and Bo is parameter of the beta function for organ expansion, both associated with organs type o (leaf blade, b; sheath, s; internode, e; cob, f; tassel, m). Parameter r is an empirical parameter, setting leaf size effect on transpiration per unit area. Sp is the projected surface area of the plant.
Note: As Pb was set to 1 for all PPDs, data were not listed here.
** P < 0·01; * P < 0·05; all other values are not significantly different.