Effects of the interrelationship of porcine somatotropin administration and dietary phosphorus on growth performance in developing gilts

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dc.contributor.author Weeden, T.L.
dc.contributor.author Hansen, J.A.
dc.contributor.author Friesen, K.G.
dc.contributor.author Richert, B.T.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Goodband, Robert D.
dc.date.accessioned 2010-02-11T22:39:43Z
dc.date.available 2010-02-11T22:39:43Z
dc.date.issued 2010-02-11T22:39:43Z
dc.identifier.uri http://hdl.handle.net/2097/2577
dc.description.abstract Seventy-two gilts (initial weight = 127 lb) were used to determine effects of the interrelationship of porcine somatotropin (pST) administration and dietary phosphorus (P) on growth performance of finishing gilts (127 to 235 lb) and for a 35 d postfinishing phase following withdrawal of pST administration. Gilts were injected daily with placebo (control) or 4 mg pST and fed .4, .6, or .8% P in the fmishing phase. Administration of pST increased average daily gain (ADG), improved feed efficiency (FIG), and decreased average daily feed intake (ADFI) during the finishing phase. Increasing dietary P resulted in increased ADG from d 0 to 28 of the finishing phase; however, dietary P had no effect on ADG, FIG, or ADFI for the overall finishing phase. When each block weight averaged 235 lb, half of the gilts were slaughtered. Administration of pST decreased backfat thickness, dressing percentage, and kidney fat weight and increased longissimus muscle area and carcass length. Dietary P had no effect on carcass criteria measured. The remaining 36 gilts were individually fed 4 Ibid of a common diet to assure P intake of 22.8 gld for the 35 d postfinishing phase. Gilts that received pST in the finishing phase had decreased ADG and poorer feed conversion in the postfinishing phase. Dietary P level in the finishing phase had no effect on postfinishing performance. From d 0 to 28 of the finishing phase, pST-treated gilts required a diet with more than .4% P (10.3 gld P) to maximize growth performance. However, a .4% P diet (12.4 and 10.7 gld P, control and pST-treated, respectively) is adequate for growth performance during the overall finishing phase (127 to 235 lb). en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1992 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 93-142-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 667 en_US
dc.subject Swine en_US
dc.subject Somatotropin en_US
dc.subject Phosphorus en_US
dc.subject Performance en_US
dc.subject Gilts en_US
dc.title Effects of the interrelationship of porcine somatotropin administration and dietary phosphorus on growth performance in developing gilts en_US
dc.type Conference paper en_US
dc.date.published 1992 en_US
dc.citation.epage 161 en_US
dc.citation.spage 157 en_US
dc.description.conference Swine Day, Manhattan, KS, November 19, 1992 en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid goodband en_US

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