Effects of heat stress, dietary energy density and exogenous porcine somatotropin on tile growth performance of finishing pigs

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dc.contributor.author Stoner, G.R.
dc.contributor.author Nichols, David A.
dc.contributor.author Allee, G.L.
dc.contributor.author Schricker, B.R.
dc.contributor.author Nelssen, Jim L.
dc.date.accessioned 2010-04-09T15:31:16Z
dc.date.available 2010-04-09T15:31:16Z
dc.date.issued 2010-04-09T15:31:16Z
dc.identifier.uri http://hdl.handle.net/2097/3555
dc.description.abstract This experiment was conducted to determine the interactive effects of environmental temperature porcine somatotropin (pST) and dietary energy density on the growth performance of finishing pigs. Forty-eight barrows were allotted randomly to four environmental chambers (EC) in a split plot design with two EClwhole plot (WP). Each EC (12 barrows/EC) represented one subplot (SP). The WP 24-h environmental cycles were: thermal neutral (TN), 8 h at 75°F and 50% relative humidity (RH)-1 h transition-14 h at 68°F and 60% RH-1 h transition; and heat stress (HS), 8 h at 95°F and 60% RH-1 h transition-14 h at 82°F and 80% RH-1 h transition. Each SP was a 2 x 3 factorial with two treatments (pigs were injected daily with either 4 mg pST (+) or placebo (-)) and three dietary energy densities (lA8, 1.60, and 1.71 Mcal ME/lb). Diets were formulated to contain 19.2% crude protein and at least 200% of NRC (1988) recommendations for essential nutrients. The study was conducted for 32 d. There were no interaction effects for ADG, average daily feed intake, d-14 respiration rate, or d-14 rectal temperature. Differences in respiration rate and rectal temperature were observed between the HS and TN environments (respiration rate 76 vs 28; rectal temperature, 103.8 vs lO1.8°F). There was an environment x pST interaction for feed efficiency (F/G). The F/G of barrows administered pST was similar in HS (2.23) and TN (2.29) environments. The F/G of placebo-treated barrows increased in HS (3.09) compared to the TN (2.80) environment. These results show that "the growth response of finishing pigs treated with pST is similar in the HS and TN environments. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 1989 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 90-163-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 581 en_US
dc.subject Swine en_US
dc.subject Heat stress en_US
dc.subject Energy en_US
dc.subject Porcine somatotropin en_US
dc.subject Pig en_US
dc.subject Growth performance en_US
dc.title Effects of heat stress, dietary energy density and exogenous porcine somatotropin on tile growth performance of finishing pigs en_US
dc.type Conference paper en_US
dc.date.published 1989 en_US
dc.citation.epage 147 en_US
dc.citation.spage 142 en_US
dc.description.conference Swine Day, Manhattan, KS, November 16, 1989 en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid dnichols en_US


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