Determining the Effects of Increasing Levels of Xylanase in Nutrient Adequate Diets on Growth Performance, Carcass Characteristics of Growing-Finishing Pigs

Authors

H. R. Kerkaert, Kansas State UniversityFollow
J. M. DeRouchey, Kansas State University, ManhattanFollow
S. S. Dritz, Kansas State University, ManhattanFollow
R. D. Goodband, Department of Animal Science and Industry, Kansas State UniversityFollow
M. D. Tokach, Department of Animal Science and Industry, Kansas State UniversityFollow
J. C. Woodworth, Kansas State UniversityFollow
H. Calderone Cartagena, Kansas State UniversityFollow
M. Gonçalves, Jefo, Saint-Hyacinthe, Quebec

Keywords

finishing pig, growth performance, xylanase

Abstract

A total of 1,944 mixed sex growing-finishing pigs (PIC; 337 × 1050; initial BW of 49.9 ± 1.18 lb) were used in a 131-d growth trial to determine the effects of increasing added xylanase xylanase in adequate diets on grow-finish pig growth performance and carcass characteristics. Pens were assigned to 1 of 6 treatments in a randomized complete block design with BW as a blocking factor. There were 12 replicate pens per treatment and 27 pigs per pen. The experimental diets were corn-soybean meal-based and were fed in 5 phases. The 6 dietary treatments were formulated to: 0, 2.3, 4.5, 9.1, 18.1, and 34.0 of enzymatic activity for xylanase (IU)/lb (0, 5, 10, 20, 40, and 75 IU/kg) of added xylanase (Belfeed B 1100 MP; Jefo Nutrition, Inc., Saint-Hyacinthe, Quebec). From d 0 to 70, there was a tendency (quadratic,P= 0.068) for average daily gain (ADG) to decrease and then increase with increasing added xylanase, but there was no evidence(P>0.10) of differences for average daily feed intake (ADFI) and feed efficiency (F/G). From d 70 to 131 and overall, there was no evidence of difference (P>0.10) observed for ADG, ADFI, and F/G. There was no evidence for difference (P>0.10) between treatments for number of pigs receiving injectable treatments or mortalities. For carcass traits, increasing xylanase increased then decreased (quadratic,P= 0.010) percentage carcass yield. Also, as xylanase increased, percentage lean decreased (linear,P= 0.038) and backfat marginally increased (linear,P= 0.066). In conclusion, adding increasing levels of xylanase in nutrient adequate diets did not impact growth performance or mortality but did improve carcass yield at intermediate levels.

Recommended Citation

Kerkaert, H. R.; DeRouchey, J. M.; Dritz, S. S.; Goodband, R. D.; Tokach, M. D.; Woodworth, J. C.; Calderone Cartagena, H.; and Gonçalves, M. (2019) "Determining the Effects of Increasing Levels of Xylanase in Nutrient Adequate Diets on Growth Performance, Carcass Characteristics of Growing-Finishing Pigs," Kansas Agricultural Experiment Station Research Reports: Vol. 5: Iss. 8. https://doi.org/10.4148/2378-5977.7854