Table 3.
The effect of dairy cow breed (Holstein-Friesian and Jersey × Holstein-Friesian), at two stocking densities (low; 2·42 cows/ha and high; 2·66 cows/ha) and year on HPD (mm) and SSD (m/m)
| Dairy cow breed | Stocking density | s.e.m. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | 2012 | 2011 | 2012 | ||||||||||||
| HF | JX | HF | JX | L | H | L | H | Year | Breed | Stocking density | Year × breed | Year × stocking density | Breed × stocking density | Year × breed × stocking density | |
| Hoof-print depth (mm) | 29 | 27 | 49 | 46 | 26 | 30 | 43 | 52 | 0·5 (P < 0·001) |
0·5 (P < 0·01) |
0·5 (P < 0·001) |
0·7 NS |
0·7 (P < 0·01) |
0·7 NS |
1·1 (P < 0·001) |
| Soil surface deformation (m/m) | 0·07 | 0·07 | 0·14 | 0·14 | 0·06 | 0·07 | 0·13 | 0·15 | 0·002 (P < 0·001) |
0·002 NS |
0·002 (P < 0·001) |
0·003 NS |
0·003 (P < 0·05) |
0·003 NS |
0·004 (P < 0·01) |
HF, Holstein-Friesian; JX, Jersey × Holstein-Friesian; L, low stocking density; H, high stocking density; NS, not significant