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ARS Home » Research » Publications at this Location » Publication #82674
Title: NUTRITIONAL EVALUATION OF POULTRY BYPRODUCT MEAL AS A PROTEIN SOURCE FOR RUMINANTS: 1. EFFECTS ON PERFORMANCE AND NUTRIENT FLOW AND DISAPPEARANCE IN STEERS.

Author
item BOHNERT, D. - UNIVERSITY OF KENTUCKY
item LARSON, B. - UNIVERSITY OF KENTUCKY
item BAUER, M. - UNIVERSITY OF KENTUCKY
item BRANCO, A. - UNIVERSITY OF KENTUCKY
item McLeod, Kyle
item HARMON, D. - UNIVERSITY OF KENTUCKY
item MITCHELL, G. - UNIVERSITY OF KENTUCKY

Submitted to: Journal of Animal Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/1/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary: Poultry byproduct meal has potential for use as a supplemental N source for ruminants. Based on the results presented in this study, poultry byproduct meal can be substituted for soybean meal (nitrogen basis) in the diets of steer calves consuming a corn silage based diet without affecting intake, average daily gain, and gain efficiency. Poultry byproduct meal also increased duodenal nitrogen flow without adversely affecting bacterial efficiency or duodenal bacterial nitrogen flow. In light of the Food and Drug Administrations proposed ban of feeding mammalian tissues to ruminants, poultry byproduct meal would be an acceptable alternative for use as a source of supplemental nitrogen. Further research is warranted evaluating poultry byproduct meal as a source of supplemental nitrogen in the diets of high producing ruminants.

Technical Abstract: Studies were conducted to assess the ability of poultry byproduct meal (PBM) as a supplemental N source for ruminants. An in situ study compared the solubility, degradation rate and ruminal escape of PBM N with blood meal (BM), corn gluten meal (CGM), and soybean meal (SBM) N. A growth study was conducted with 95 crossbred steers to evaluate the performance and gain efficiency (GEFF) of calves consuming increasing levels of PBM. A digestion trial was performed to measure nutrient flow and disappearance in response to increasing levels of PBM. The basal diet for the growth and digestion studies consisted to 49% corn silage, 36% cottonseed hulls and 15% supplement. Treatments were SBM and 0, 25, 50, 75, and 100 % PBM, with urea used to balance for N. In situ ruminal escape N was greater (P<.05) for PBM compared with SBM, however, a greater (P<.05) proportion of BM and CGM N escaped ruminal degradation compared with PBM. Dry matter intake, ADG, GEFF increased linearly (P<.003) as PBM increased in the diet. Duodenal N flow and small intestinal N disappearance increased linearly (P<.05) as PBM increased in the diet. SBM decreased (P<.04) bacterial CP synthesis compared with 0 and 100% PBM. Ruminal ammonia N (NH3N) decreased linearly (P<.001) as PBM level increased, while 100% PBM decreased (P<.001) and 0% PBM increased (P<.01) ruminal NH3N concentration compared with SBM. These data suggest that PBM can effectively be used in place of SBM (N basis) as a source of supplemental N for steer calves consuming corn silage based diets.