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Growth response of broilers to spray-dried plasma in pelleted or expanded feed processed at high temperature

J. M. Campbell^*,1, L. E. Russell^*, J. D. Crenshaw^*, K. C. Behnke and P. M. Clark

^* APC Inc., Ankeny, IA 50021; and Kansas State University, Manhattan, KS 66506

¹ Corresponding author: joy.campbell{at}amerprotcorp.com

A series of 4 experiments evaluated effects of mash conditioning temperature from a pellet mill or expander on performance of broilers fed pelleted diets containing spray-dried plasma (SDP). All experiments utilized Ross x Ross 308 male broilers randomly assigned to their respective treatments (6 or 10 broilers/pen and 8 or 10 pens/treatment). Treatments in Exp. 1 consisted of a control (0% SDP), SDP coated postpelleting, or SDP blended into the meal prepelleting. Experiment 2 and 3 included the same 3 treatments as in Exp. 1 but with additional treatments of SDP blended into the meal and conditioned at 90 or 95°C before pelleting. In Exp. 4, treatments consisted of a control (0% SDP) or SDP blended into the meal and pelleted (85°C conditioning temperature) or expanded (149°C final effective temperature) and then pelleted. Corn-soybean meal-based diets were formulated to be equal in lysine and ME in all experiments. Pelleted diets were conditioned for 15 s at 85°C, and expanded diets were conditioned at 95°C, 29.7 MJ/t, 13.95 kg/cm² cone pressure, exit temperature of 149°C, and then pelleted through a 4 x 32-mm die. In Exp. 1, ADG and feed intake were improved (P < 0.05) for broilers fed SDP from d 1 to 28 of age, with greater BW at d 42. In Exp. 2, both in early (d 1 to 28 of age) phases, and overall (d 1 to 42 of age), broilers fed SDP had improved (P < 0.05) gain and efficiency. In Exp. 3, ADG, feed intake, efficiency of gain, and BW were improved (P < 0.01) for broilers fed SDP from d 1 to 21 of age, regardless of conditioning temperature. In Exp. 4, broilers fed SDP had improved (P < 0.05) gain, BW, and feed intake regardless of processing method. Overall, the results of all of the experiments demonstrated that pellet conditioning temperature from 85 to 95°C and expander temperatures to 149°C did not impair the positive growth effects of SDP in pelleted or expanded broiler feed.

Key Words: broiler • feed processing • spray-dried plasma

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				E. D. Fruge, M. L. Roux, R. D. Lirette, T. D. Bidner, L. L. Southern, and J. D. Crenshaw Effects of dietary spray-dried plasma protein on sow productivity during lactation J Anim Sci, March 1, 2009; 87(3): 960 - 964. [Abstract] [Full Text] [PDF]