Effects of porcine somatotropin dosage and lysine level on growth performance of growing pigs

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dc.contributor.author Fitzner, G.E.
dc.contributor.author Weeden, T.L.
dc.contributor.author Schricker, B.R.
dc.contributor.author Hines, Robert H.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Hancock, Joe D.
dc.date.accessioned 2010-04-08T19:47:23Z
dc.date.available 2010-04-08T19:47:23Z
dc.date.issued 2010-04-08T19:47:23Z
dc.identifier.uri http://hdl.handle.net/2097/3537
dc.description.abstract Eighty crossbred barrows initially weighing 70.5 lb were used in a 5 wk trial to determine the optimum dosage of porcine somatotropin (PST) required to promote maximum growth response in growing pigs fed diets containing either 1.0 or 2.0% lysine. Pigs received a daily injection of placebo or 2, 4, or 8 mg pST in combination with one of two experimental diets containing either 1.0 or 2.0% dietary lysine. Increasing the dosage of pST of pigs fed both diets resulted in an increase in average daily gain (ADG), a reduction in average daily feed intake (ADFI), and an improvement in feed conversion (F/G). Average backfat, calculated from ultrasonic measurements at the first rib, last rib, and last lumbar vertebra, was reduced in pigs fed both diets as pST dosage increased. Serum pST increased and urea nitrogen decreased for pigs fed both diets as pST dosage increased. The improvement in ADG and F/G of pigs fed both diets was quadratic, indicating that a plateau was achieved between 4 and 8 mg/d pST administration. The serum urea nitrogen response appeared to plateau near 8 mg/d. The combination of these response criteria indicates that the dosage required for maximum response is about 7 mg/d pST, whereas the more optimum level of pST administration may be about 5 mg/d for growing pigs fed diets containing 1.0 or 2.0% lysine. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1991 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 92-193-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 641 en_US
dc.subject Swine en_US
dc.subject GF en_US
dc.subject Repartition en_US
dc.subject Performance en_US
dc.subject Lysine en_US
dc.title Effects of porcine somatotropin dosage and lysine level on growth performance of growing pigs en_US
dc.type Conference paper en_US
dc.date.published 1991 en_US
dc.citation.epage 100 en_US
dc.citation.spage 97 en_US
dc.description.conference Swine Day, Manhattan, KS, November 21, 1991 en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jhancock en_US


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