Table 2.
Biomass harvested after 480 h from split root labelling and treatments in the one- and two-compartment N transfer experiments from clover to grass. Values are mean ± SE (n = 4). Lower case letters indicate a significant difference between the treatments determined via a one-way ANOVA and multiple pairwise comparisons (p < 0.05). LabC = labelling compartment, TraC = transfer compartment
| Dry matter (mg plant−1) | |||||||
|---|---|---|---|---|---|---|---|
| CLOVER | RYEGRASS | ||||||
| Roots LabC | Shoots | Roots TraC | Total | Roots TraC | Shoots | Total | |
| Control | 99 ± 25.8 | 341 ± 25.8 a | 90 ± 13.7 | 530 ± 26.0 | 127 ± 25.8 a | 318 ± 28 | 446 ± 41 a |
| 15N-urea | 88 ± 19.6 | 228 ± 19.6 b | 111 ± 35.9 | 426 ± 48.4 | 435 ± 65.2 b | 380 ± 44 |
801 ± 90 b |
| Decomposition | n/a | n/a | n/a | n/a | 252 ± 30.6 ab | 457 ± 42 | 708 ± 60 ab |
| Exudation | n/a | n/a | n/a | n/a | 446 ± 172 b | 515 ± 51 | 961 ± 150 b |
| Defoliation | 35.3 ± 4.48 | n/a | 67.4 ± 11.9 | 305 ± 27.0 | 265 ± 45.6 ab | 428 ± 59 | 693 ± 100 ab |
| Sterile | 87 ± 21.7 | 220 ± 57.3 b | 56 ± 22.8 | 349 ± 54.4 | 346 ± 101.ab | 470 ± 72 | 816 ± 90.2 b |
| Fungi | 74 ± 21.4 | 291 ± 23.1 ab | 118 ± 17.6 | 484 ± 21.2 | 163 ± 26.7 ab | 420 ± 62 | 584 ± 86 ab |
| Weevil | 106 ± 46.2 | 284 ± 49.0 ab | 72 ± 16.6 | 463 ± 71.7 | 188 ± 63.2 ab | 320 ± 37 | 508 ± 80 ab |
| ANOVA | p > 0.05 | p < 0.05 | p > 0.05 | p > 0.05 | p < 0.01 | p > 0.05 | p < 0.001 |