Effect of humidity on flow ability of specialty protein sources in nursery diets

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dc.contributor.author Carney, E.E.
dc.contributor.author Groesbeck, C.N.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2009-10-19T15:17:26Z
dc.date.available 2009-10-19T15:17:26Z
dc.date.issued 2009-10-19T15:17:26Z
dc.identifier.uri http://hdl.handle.net/2097/1827
dc.description.abstract We conducted an experiment to determine the effects of humidity on angle of repose (flowabilty) of different specialty protein sources. Five specialty proteins sources were used: fish meal, powdered blood meal (AP301), granulated blood meal (AP301G), powdered spray-dried animal plasma (AP920), and granulated spray-dried animal plasma (Appetein). The specialty protein sources were added at 0, 2.5, 5, 7.5, and 10% to a 70:30 corn-soybean meal blend. The experiment was conducted in an environmentally controlled nursery to minimize temperature and humidity fluctuations. There were two relative humidity levels, 34 and 64%. All samples were placed in the barn 24 h before the experiment was conducted to allow acclimation to the conditions. Flow ability was then determined by measuring angle of repose. Angle of repose is the maximum angle in which a pile of ingredient retains its slope. A large angle of repose represents a steeper slope and poorer flow ability. There was a protein source × inclusion level × humidity interaction observed (P<0.01). Humidity increased angle of repose, decreasing flow ability. Angle of repose increased with increasing inclusions of powdered animal plasma and fish meal, resulting in poorer flow ability. Powdered blood cells did not affect angle of repose with increasing inclusion levels. Angle of repose decreased as granular animal plasma and blood cell inclusions increased, improving flow ability. In conclusion, specialty protein ingredients in powder form reduce flow ability, while granulated specialty protein sources improve flow ability. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 08-121-S en_US
dc.relation.isPartOf Swine day, 2007 en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 985 en_US
dc.subject Swine en_US
dc.subject Feed manufacturing en_US
dc.subject Angle of repose en_US
dc.subject Humidity en_US
dc.title Effect of humidity on flow ability of specialty protein sources in nursery diets en_US
dc.type Conference paper en_US
dc.date.published 2007 en_US
dc.citation.epage 217 en_US
dc.citation.spage 215 en_US
dc.description.conference Swine Day, 2007, Kansas State University, Manhattan, KS, 2007 en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid jderouch en_US


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