TABLE 3.
Results of two-way ANOVA testing the effect of the irrigation treatments (dry vs. irrigated) and the fine-root sampling methods (ingrowth cores vs. soil cores) on fine-root traits in 2016.
| Fine-root traits |
Treatment |
Method |
Treatment × Method |
||||||
| dF | F | P | dF | F | P | dF | F | P | |
| Biomass (g m−2) | 1 | 11.9 | 0.002 | 1 | 6.36 | 0.02 | 1 | 0.25 | 0.62 |
| Length (m m−2) | 1 | 10.2 | 0.003 | 1 | 0.09 | 0.77 | 1 | 0.14 | 0.71 |
| Diameter (mm) | 1 | 0.12 | 0.73 | 1 | 67.5 | <0.001 | 1 | 1.21 | 0.28 |
| Tips (n cm−1) | 1 | 1.82 | 0.19 | 1 | 110.6 | <0.001 | 1 | 1.34 | 0.26 |
| Forks (n cm−1) | 1 | 12.1 | 0.002 | 1 | 63.4 | <0.001 | 1 | 4.06 | 0.05 |
| SRL (m g−1) | 1 | 0.05 | 0.83 | 1 | 14.4 | <0.001 | 1 | 1.06 | 0.31 |
| RTD (g cm−3) | 1 | 1.70 | 0.20 | 1 | 7.85 | 0.01 | 1 | 0.15 | 0.71 |
Significant effects (P < 0.05) are shown in bold. SRL, specific root length; RTD, root tissue density.