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Journal of Animal Science, Vol 73, Issue 8 2340-2346, Copyright © 1995 by American Society of Animal Science

JOURNAL ARTICLE

Effects of spray-dried porcine plasma protein on growth traits and nitrogen and energy balance in mice

J. E. Thomson, E. E. Jones and E. J. Eisen
Department of Animal Science, North Carolina State University, Raleigh 27695-7621, USA.

Energy and nitrogen balances of mice receiving a dried skim milk-based control diet were compared to a similar group of mice receiving a diet containing 8% spray-dried plasma protein (SDPP). Mice were housed in pairs in metabolism cages with feed and water available for ad libitum intake. Five cages were assigned to each diet for a 21-d feeding period. Mice fed SDPP gained more weight (P < .01), consumed more feed (P < .01), and had higher gain: feed ratios (G:F) (P < .01) than mice fed the control diet during wk 1. No significant differences in growth, feed intake, or G:F were detected during wk 2. During wk 3, mice receiving the control diet tended to gain more (P < .10) and had a higher G:F (P < .01). Nitrogen intake and retention were greater for mice fed SDPP (P < .02). Energy intake was greater for mice fed SDPP (P < .01); however, energy retention was not different between treatment groups due to greater (P < .01) metabolic energy losses (urinary energy+heat production). Empty gut weight was greater for control mice on an absolute basis (P < .05) and when expressed as a percentage of BW (P < .02). Liver weights of mice fed SDPP were greater on an absolute basis (P < .02) and as a percentage of BW (P < .01). Feed intake, growth rate, and G:F were increased by dietary addition of SDPP.(ABSTRACT TRUNCATED AT 250 WORDS)


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