Effects of xylanase in growing-finishing diets varying in dietary energy and fiber on growth performance, carcass characteristics, and nutrient digestibility

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dc.contributor.author Barnes, J.A.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2012-02-16T19:44:50Z
dc.date.available 2012-02-16T19:44:50Z
dc.date.issued 2012-02-16
dc.identifier.uri http://hdl.handle.net/2097/13495
dc.description.abstract A total of 576 pigs (PIC TR4 × 1050, 106 lb initial BW) were used in a 75-d trial to evaluate effects of xylanase (Porzyme 93010; Danisco Animal Nutrition, St. Louis, MO) in growing-finishing diets varying in dietary energy and fiber on growth perfor- mance, carcass characteristics, and nutrient digestibility. Pens of pigs were randomly allotted to 1 of 6 dietary treatments in a 2 × 3 factorial (with or without xylanase and 3 dietary energy levels) with 8 pigs per pen and 12 replications per treatment. The 6 treatments consisted of corn-soybean meal-based diets with added dried distillers grains with solubles (DDGS), wheat middlings (midds), and choice white grease (CWG) arranged to make low- (30% DDGS, 12.5% midds, and 0% CWG), medium- (15% DDGS, 6.25% midds, and 1.2% CWG), and high-energy diets (0% DDGS, 0% midds, and 2.4 % CWG) with or without xylanase (0 or 4,000 units xylanase per kilogram of diet). Diets were formulated to contain increasing dietary CWG in the medium- and high-energy treatments to maintain uniform dietary crude fat levels. All diets were fed in meal form and in 4 phases. No xylanase × energy interactions (P ≥ 0.06) occurred for any criteria evaluated. Overall (d 0 to 75), pigs fed diets with xylanase had poorer ADG (P < 0.02) compared with pigs fed diets without added xylanase. No differences were found in any other growth response criteria between pigs fed diets with or without xylanase. Pigs fed diets with increasing energy had improved (linear; P < 0.001) ADG and F/G with no effect on ADFI. For carcass traits, increasing energy improved carcass yield (linear; P < 0.01) and HCW (linear; P < 0.001), but increased backfat depth (linear; P < 0.01). Furthermore, pigs fed diets with increasing energy had lower lean percentage (linear; P < 0.003) and jowl fat iodine value (IV) (linear; P < 0.001). Apparent fecal digestibility of ADF improved (P < 0.002) with the addition of dietary xylanase; however, there were no differences in any other nutrient digestibility criteria evaluated. As dietary energy increased, apparent digestibility of DM, N, fat, GE, ADF, and NDF increased (linear, P < 0.02). Feeding pigs diets with increasing energy levels resulted in improved performance over those fed low-energy diets. Although ADF digestibility was increased with xylanase supplementation, growth performance, carcass characteristics, and other nutrient digestibility values did not improve. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine Day, 2011 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 12-064-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1056 en_US
dc.subject Swine en_US
dc.subject Fiber en_US
dc.subject Finishing pig en_US
dc.subject Zylanase en_US
dc.title Effects of xylanase in growing-finishing diets varying in dietary energy and fiber on growth performance, carcass characteristics, and nutrient digestibility en_US
dc.type Conference paper en_US
dc.date.published 2011 en_US
dc.citation.epage 239 en_US
dc.citation.spage 227 en_US
dc.description.conference Swine Day, Manhattan, KS, November 17, 2011 en_US
dc.contributor.authoreid jderouch en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jnelssen en_US


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