Estimate live or carcass lean percentage and backfat thickness.
Key formulas: carcass×lean÷100
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Backfat measurement | Backfat is measured some 6 to 8 cm off the midline at the last rib, the main regressor for lean percentage | EU Regulation (EC) No 1249/2008, carcass classification rules |
| Lean estimate | Lean percentage follows a regression on backfat and loin eye area with coefficients varying by breed and carcass weight | NPPC 1991, Procedures to Evaluate Market Hogs |
| Grading use | Lean percentage drives carcass grading and payment, so measurement must be standardised across herds | EU Regulation (EC) No 1249/2008, carcass classification rules |
用于活体或胴体瘦肉率的快速估算。输入背膘厚、活重、性别与畜种,依据回归经验公式估算胴体瘦肉率,并按猪/牛/羊给出等级评定,同时换算胴体重与瘦肉重。