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. 2024 Jan 27;102:skae026. doi: 10.1093/jas/skae026

Table 10.

Effects of energy contents on growth performance in nursery pigs

Treatment ME1, kcal/kg Xylanase2, XU/kg P value
Item 3,400 3,375 3,350 3,325 3,300 1,200 2,400 3,600 SEM ME linear3 ME quad3 ME 3,400 vs. others3 Xylanase linear4 Xylanase quad4 LE vs. xylanase4
BW, kg
 Initial 7.3 7.3 7.3 7.3 7.3 7.3 7.3 7.3 0.6 0.972 0.980 0.991 0.982 0.990 0.980
 Day 7 8.8 8.6 8.9 8.6 8.7 8.6 8.4 8.8 0.7 0.853 0.900 0.658 0.906 0.173 0.577
 Day 14 10.9 10.5 11.1 10.6 10.5 10.5 10.7 10.7 1.1 0.471 0.708 0.440 0.620 0.949 0.820
 Day 21 14.0 12.6 13.7 13.3 13.8 12.9 13.3 13.6 1.2 0.833 0.207 0.225 0.953 0.233 0.358
 Day 28 18.7 17.2 18.4 17.9 17.7 17.1 17.6 18.0 1.5 0.431 0.664 0.149 0.566 0.397 0.859
 Day 35 23.0 21.4 22.5 21.8 22.3 21.7 21.9 22.2 2.0 0.639 0.407 0.232 0.980 0.520 0.686
ADG, g
 Pre-starter 260 227 275 237 232 227 244 241 35 0.368 0.633 0.326 0.533 0.950 0.775
 Starter 574 522 540 532 558 533 531 550 45 0.779 0.175 0.204 0.823 0.387 0.494
 Overall 449 404 434 414 427 410 417 426 40 0.609 0.368 0.192 0.975 0.496 0.670
ADFI, g
 Pre-starter 600a 535b 590a 547b 552b 547 560 560 37 0.116 0.500 0.025 0.642 0.895 0.858
 Starter 860 744 837 807 812 762 805 823 78 0.759 0.368 0.127 0.615 0.329 0.707
 Overall 838a 746b 808ab 774ab 783ab 755 778 788 67 0.365 0.327 0.064 0.765 0.500 0.774
G/F
 Pre-starter 0.45 0.42 0.46 0.42 0.42 0.41 0.43 0.43 0.04 0.462 0.623 0.571 0.631 0.772 0.990
 Starter 0.67 0.70 0.65 0.66 0.69 0.70 0.66 0.67 0.02 0.977 0.359 0.772 0.265 0.984 0.612
 Overall 0.54 0.54 0.54 0.53 0.55 0.54 0.53 0.54 0.01 0.691 0.599 0.812 0.651 0.582 0.582

1Metabolizable energy level at 3,400 kcal/kg of feed (CON), 3,375 kcal/kg of feed, 3,350 kcal/kg of feed, 3,325 kcal/kg of feed, and 3,300 (LE) kcal/kg of feed.

2Xylanase supplemented at 0 (LE), 1,200, 2,400, and 3,600 XU/kg feed (LEX) to LE treatment (3,300 kcal/kg feed).

3Dose–response effects of ME level (3,400 kcal/kg of feed [CON], 3,375 kcal/kg of feed, 3,350 kcal/kg of feed. 3,325 kcal/kg of feed, and 3,300 kcal/kg of feed [LE]).

4Dose response effects of xylanase supplementation (xylanase at 0 XU/kg feed [LE], 1,200 XU/kg feed, 2,400 XU/kg feed, and 3,600 XU/kg feed [LEX]).