Table 4.
Evaluation of DM digestibility when compared with CR DM digestibility results using the root mean square prediction error (RMSPE)1, concordance correlation coefficient (CCC)2, and the Nash–Sutcliffe efficiency (NSE) method and their decompositions
| R 2 | Mean recovery % | RMSPE, g | RMSPE % of observations mean | ECT | ER | ED | CCC | ν | u | C b | NSE | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lig3 | 0.59 | 187.3 | 8.40 | 0.10 | 0.89 | 0.005 | 0.10 | 0.07 | 0.42 | 3.64 | 0.12 | −5.28 |
| iADF | 0.61 | 83.8 | 3.93 | 0.04 | 0.50 | 0.04 | 0.45 | 0.43 | 0.85 | −0.9 | 0.71 | −0.4 |
| iNDF | 0.64 | 68.2 | 7.68 | 0.09 | 0.87 | 0.02 | 0.11 | 0.19 | 0.95 | −2.2 | 0.29 | −4.24 |
| iLig | 0.59 | 56.9 | 13.7 | 0.16 | 0.87 | 0.09 | 0.04 | 0.11 | 1.79 | −2.9 | 0.19 | −15.7 |
1RMSPE decomposes into the error of central tendency (ECT), the error due to regression (ER), and the dispersion error (ED).
2The CCC decomposes into the scale shift (ν), location shift (u), and the bias correction factor (Cb).
3Lig = lignin; iADF = indigestible ADF; iNDF = indigestible NDF; iLig = indigestible lignin.