Added dietary methionine in starter pig diets containing spray-dried blood products.
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)
Owen
K Q
KQ
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201, USA.
Nelssen
J L
JL
Goodband
R D
RD
Tokach
M D
MD
Kats
L J
LJ
Friesen
K G
KG
D000601:Amino Acids, Essential / Q000097:blood; D000818:Animals; D001798:Blood Proteins / Q000032:analysis / Q000592:standards*; D004032:Diet / Q000592:standards / Q000662:veterinary*; D005260:Female; D008297:Male; D008715:Methionine / Q000008:administration & dosage* / Q000032:analysis; D009751:Nutritional Requirements; D011897:Random Allocation; D013552:Swine / Q000097:blood / Q000254:growth & development*
D000601:Amino Acids, Essential; D001798:Blood Proteins; D008715:Methionine