Table 4.
Production performance indicators of broilers kept on 2 different flooring systems of 4 different fattening periods (repetitions; n = 4 calculated values per fattening period and barn).
| Summer | Fall | Winter | Spring | Mean | SD | 95% CI | |
|---|---|---|---|---|---|---|---|
| Fattening period (d) | 31.00 | 32.00 | 32.00 | 32.00 | |||
| Feed consumption (kg bird−1) | |||||||
| Littered | 2.73 | 2.84 | 2.94 | 2.52 | 2.76 | 0.18 | [2.47];[3.04] |
| Part. perforated | 2.64 | 2.93 | 2.86 | 2.75 | 2.80 | 0.13 | [2.59];[3.00] |
| Cum. daily mortality (%) | |||||||
| Littered | 4.72 | 5.56 | 2.02 | 4.29 | 4.15 | 1.51 | [1.74];[6.56] |
| Part. perforated | 4.51 | 6.19 | 2.23 | 5.56 | 4.62 | 1.74 | [1.86];[7.39] |
| FCR1,2 | |||||||
| Littered | 1.395 | 1.41 | 1.43 | 1.33 | 1.39 | 0.04 | [1.32];[1.46] |
| Part. perforated | 1.425 | 1.41 | 1.37 | 1.43 | 1.41 | 0.03 | [1.37];[1.45] |
| EPEF3,4 | |||||||
| Littered | 444.08 | 431.29 | 450.37 | 432.69 | 439.61 | 9.18 | [425.00];[454.22] |
| Part. perforated | 413.92 | 440.26 | 477.34 | 404.99 | 434.13 | 32.47 | [382.47];[485.79] |
The table contains mean values (mean), standard deviation of mean values (SD), and 95% confidence intervals (95% CI).
1
FCR: feed conversion ratio.
2
FCR = feed consumption (kg bird−1)/total weight gain (kg bird−1).
3
EPEF: European Production Efficiency Factor.
4
EPEF = (survival rate (%) x final body weight (kg))/(age (d) x feed conversion ratio) x 100.
5
The average initial body weight was used to calculate the FCR of the summer fattening period.