Journal of Animal Science, Vol 73, Issue 9 2647-2654, Copyright © 1995 by American Society of Animal Science

JOURNAL ARTICLE

Added dietary methionine in starter pig diets containing spray-dried blood products

K. Q. Owen, J. L. Nelssen, R. D. Goodband, M. D. Tokach, L. J. Kats and K. G. Friesen
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201, USA.

Two experiments were conducted to determine the dietary methionine requirement of weanling pigs fed diets containing spray-dried porcine plasma and(or) blood meal in a phase-feeding program. In Exp. 1, 216 crossbred pigs (21 +/- 2 d of age and 4.9 kg BW) were fed diets (1.6% lysine, .52% cystine) containing 10% spray-dried porcine plasma and 1.75% spray-dried blood meal from d 0 to 21 postweaning. Pigs were fed one of six dietary treatments ranging from .28 to .48% total dietary methionine (.225 to .425% apparent digestible methionine). From d 0 to 14 and d 0 to 21 postweaning, ADG, ADFI, and gain:feed ratio (G:F) increased (quadratic, P < .01) as dietary methionine increased. Inflection point analysis projected .42 and .41% total dietary methionine to maximize ADG and G:F from d 0 to 14 and d 0 to 21 postweaning, respectively. In Exp. 2,216 crossbred pigs (21 +/- 3 d of age and 5.6 kg BW) were used to determine the dietary methionine requirement from d 7 to 28 postweaning. All pigs were fed the same diet (1.6% lysine, .44% methionine, .52% cystine) from d 0 to 7 postweaning. From d 7 to 28, pigs were assigned to one of six dietary treatments (1.3% lysine, .46% cystine) containing 10% dried whey and 3% spray-dried blood meal. Total dietary methionine levels ranged from .27 to .42% (.249 to .399% apparent digestible methionine). From d 7 to 14 postweaning, increasing dietary methionine increased (quadratic, P < .05) ADG, ADFI, and G:F (.34 to .35% total methionine projected by inflection point analysis).(ABSTRACT TRUNCATED AT 250 WORDS)

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