Influence of a superdose of phytase (Optiphos) on finishing pig performance and carcass characteristics

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dc.contributor.author Goodband, Robert D.
dc.contributor.author Langbein, Kari Beth
dc.contributor.author Tokach, Michael D.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2014-04-28T15:19:56Z
dc.date.available 2014-04-28T15:19:56Z
dc.date.issued 2014-04-28
dc.identifier.uri http://hdl.handle.net/2097/17613
dc.description.abstract A total of 1,188 finishing pigs (PIC 337 × 1050, initially 80.1 lb) were used in a 92-d experiment to determine the influence of providing phytase above that needed to meet the P requirement for growth performance and carcass characteristics. There were 27 pigs per pen and 11 pens per treatment. Each pen contained a similar number of barrows and gilts. Pens were randomly assigned to treatment based on initial BW. Basal diets contained corn, soybean meal, dried distillers grains with solubles (DDGS), and bakery meal and were formulated to meet or exceed the nutrient requirements of the pigs in each of the four phases. The four dietary treatments were formed by adding increasing levels of phytase (Optiphos 2000, Enzyvia LLC) at 0.25 (control), 0.5, 1.0 and 2.0 lb/ton. Diets were formulated such that the addition of the first 0.25 lb/ton of phytase was needed to meet the P requirement of the pigs, with further additions exceeding the P requirement. Pigs were weighed and feed disappearance was determined approximately every 14 d to determine ADG, ADFI, and F/G. On d 92, pigs were tattooed by pen number and harvested to collect carcass data. Overall (d 0 to 92), increasing dietary phytase did not influence ADG but reduced (cubic, P < 0.01) ADFI, resulting in an improvement in F/G (cubic, P < 0.01). The cubic response occurred because F/G improved as phytase inclusion increased from 0.25 to 0.5 lb/ton, with no further improvement when phytase was increased to 1.0 or 2.0 lb/ton. Phytase addition to the diet did not influence carcass measurements. These results suggest that providing phytase at levels above that needed to meet the pig’s requirement for P has the potential to improve feed efficiency. en_US
dc.language.iso en_US en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2013 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 14-044-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1092 en_US
dc.subject Finishing pig en_US
dc.subject Phosphorus en_US
dc.subject Phytase en_US
dc.title Influence of a superdose of phytase (Optiphos) on finishing pig performance and carcass characteristics en_US
dc.type Conference paper en_US
dc.date.published 2013 en_US
dc.citation.epage 120 en_US
dc.citation.spage 116 en_US
dc.description.conference Swine Day, Manhattan, KS, November 21, 2013 en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jderouch en_US


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