Owen K Q, Nelssen J L, Goodband R D, Tokach M D, Kats L J, Friesen K G
Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506-0201, USA.
J Anim Sci. 1995 Sep;73(9):2647-54. doi: 10.2527/1995.7392647x.
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)
进行了两项试验，以确定在分阶段饲养方案中，给断奶仔猪饲喂含有喷雾干燥猪血浆和（或）血粉的日粮时，其对蛋氨酸的日粮需求。在试验1中，选用216头杂交仔猪（21±2日龄，体重4.9千克），从断奶后第0天至第21天，给它们饲喂含10%喷雾干燥猪血浆和1.75%喷雾干燥血粉的日粮（赖氨酸含量1.6%，胱氨酸含量0.52%）。给仔猪饲喂六种日粮处理之一，日粮总蛋氨酸含量范围为0.28%至0.48%（表观可消化蛋氨酸含量0.225%至0.425%）。在断奶后第0天至第14天以及第0天至第21天，随着日粮蛋氨酸含量增加，平均日增重（ADG）、平均日采食量（ADFI）和增重:采食量比（G:F）呈二次曲线增加（P<0.01）。拐点分析预测，断奶后第0天至第14天和第0天至第21天，日粮总蛋氨酸含量分别为0.42%和0.41%时，ADG和G:F达到最大值。在试验2中，选用216头杂交仔猪（21±3日龄，体重5.6千克），以确定断奶后第7天至第28天的日粮蛋氨酸需求。从断奶后第0天至第7天，所有仔猪均饲喂相同日粮（赖氨酸含量1.6%，蛋氨酸含量0.44%，胱氨酸含量0.52%）。从断奶后第7天至第28天，将仔猪分配到六种日粮处理之一（赖氨酸含量1.3%，胱氨酸含量0.46%），日粮含10%干乳清和3%喷雾干燥血粉。日粮总蛋氨酸水平范围为0.27%至0.42%（表观可消化蛋氨酸含量0.249%至0.399%）。在断奶后第7天至第14天，随着日粮蛋氨酸含量增加，ADG、ADFI和G:F呈二次曲线增加（P<0.05）（拐点分析预测总蛋氨酸含量为0.34%至0.35%）。（摘要截短至250字）
