Table 6.
Chemical composition of samples of early and late first cut of pre-wilted perennial ryegrass silages.
| Pre-Wilted Perennial Ryegrass Silage | ||
|---|---|---|
| Item | Early First Cut | Late First Cut |
| Chemical composition 1 | ||
| DM (g/kg fresh matter) | 350 | 350 |
| Ash (g/kg DM) | 77.1 | 62.9 |
| N (g/kg DM) | 18.0 | 14.5 |
| ADIN (g/100 g total N) | 0.0 | 1.10 |
| NDF (g/kg DM) | 389 | 438 |
| ADF (g/kg DM) | 186 | 227 |
| Lignin (g/kg DM) | 5.80 | 6.14 |
| Gas production parameters 2 | ||
| PGP (mL/g DM) | 271 | 274 |
| c (per h) | 5.70 | 4.81 |
| Lag (h) | 1.79 | 1.54 |
| AGPR (mL/h) | 9.67 | 8.56 |
| DMED (g/kg) | 548 | 513 |
| DMPD (g/kg) | 930 | 899 |
1 DM: dry matter; OM: organic matter; N: nitrogen; ADIN: acid detergent insoluble N; NDF: neutral detergent fiber; ADF: acid detergent fiber; Lignin: cellulose solubilization by sulfuric acid after extraction with acid detergent; 2 PGP: potential gas production; c: fractional rate of gas production, lag: time before starting gas production, AGPR: average gas production rate until half of PGP was reached; DMED: DM effective degradability calculated for a rumen particulate outflow of 3% per h; DMPD: DM potential degradability after 120 h of in vitro incubation.