Table 2.
Effects of live yeast or live yeast combined with zinc oxide on performance and diarrhea rate of nursery pigs.
| Items | CTR 1 | CTC-ZnO 1 | LY 1 | LY-ZnO 1 | SEM | p-Value |
|---|---|---|---|---|---|---|
| d 1 BW, kg | 9.17 | 9.20 | 9.14 | 9.19 | 0.183 | 0.99 |
| ADG 2, g | ||||||
| d 1 to 7 | 425 b | 435 b | 510 a | 502 a | 14.723 | <0.01 |
| d 8 to 14 | 469 b | 548 a | 539 a | 565 a | 19.558 | 0.01 |
| d 15 to 21 | 555 | 544 | 605 | 573 | 23.311 | 0.30 |
| d 22 to 28 | 585 | 585 | 620 | 613 | 12.230 | 0.11 |
| d 1 to 14 | 447 b | 491 ab | 525 a | 534 a | 15.078 | <0.01 |
| d 15 to 28 | 570 | 564 | 612 | 593 | 15.548 | 0.14 |
| d 1 to 28 | 508 b | 528 ab | 569 a | 563 a | 14.320 | 0.02 |
| ADFI 2, g | ||||||
| d 1 to 7 | 724 b | 711 b | 772 ab | 805 a | 22.312 | 0.03 |
| d 8 to 14 | 795 | 852 | 843 | 858 | 34.364 | 0.57 |
| d 15 to 21 | 931 | 914 | 1013 | 995 | 37.361 | 0.21 |
| d 22 to 28 | 1085 | 1062 | 1153 | 1116 | 30.790 | 0.21 |
| d 1 to 14 | 760 | 781 | 807 | 831 | 22.938 | 0.17 |
| d 15 to 28 | 1008 | 988 | 1083 | 1055 | 26.816 | 0.08 |
| d 1 to 28 | 884 | 885 | 945 | 943 | 20.862 | 0.07 |
| FCR 2, g/g | ||||||
| d 1 to 7 | 1.70 a | 1.65 a | 1.52 b | 1.60 a | 0.030 | <0.01 |
| d 8 to 14 | 1.69 a | 1.56 ab | 1.57 ab | 1.52 b | 0.036 | 0.02 |
| d 15 to 21 | 1.68 | 1.69 | 1.67 | 1.74 | 0.040 | 0.68 |
| d 22 to 28 | 1.86 | 1.82 | 1.86 | 1.82 | 0.037 | 0.81 |
| d 1 to 14 | 1.70 a | 1.60 ab | 1.54 b | 1.56 b | 0.025 | <0.01 |
| d 15 to 28 | 1.77 | 1.76 | 1.77 | 1.78 | 0.026 | 0.94 |
| d 1 to 28 | 1.74 a | 1.68 ab | 1.66 b | 1.68 ab | 0.020 | <0.01 |
| Diarrhea rate, % | ||||||
| d 1 to 7 | 14.3 a | 3.6 b | 7.1 ab | 6.5 ab | 2.406 | 0.03 |
| d 8 to 14 | 29.0 a | 15.0 b | 17.9 b | 5.8c | 1.443 | <0.01 |
| d 15 to 21 | 12.1 a | 9.3 ab | 2.2 b | 5.3 ab | 2.342 | 0.03 |
| d 22 to 28 | 2.3 | 1.5 | 0.0 | 0.0 | 0.645 | 0.06 |
| d 1 to 14 | 21.7 a | 9.3 bc | 12.5 b | 6.1c | 1.511 | <0.01 |
| d 15 to 28 | 7.2 a | 5.4 ab | 1.1 b | 2.6 ab | 1.370 | 0.02 |
| d 1 to 28 | 14.4 a | 7.3 b | 6.8 b | 4.4 b | 1.237 | <0.01 |
Note: SEM is standard error of mean. n = 8 indicating the data was analyzed in 8 pens per treatment. a–c Within a row, different superscripts mean significant difference (p < 0.05). 1 CTR: control; CTC-ZnO: chlortetracycline + zinc oxide; LY: live yeast; LY-ZnO: live yeast + zinc oxide. 2 ADG, average daily gain; ADFI, average daily feed intake; FCR, feed conversion ratio.