将30头大长北经产母猪随机分为3组，产后饲喂0.60％(I组)、0.80％(Ⅱ组)、1.00％(Ⅲ组) 3种赖氨酸水平的泌乳期饲粮。研究饲粮赖氨酸水平对泌乳母猪生产性能及血液、奶生化指标的影响。结果表明：增加饲粮赖氨酸浓度对哺乳21d的母猪体重、采食量、断奶至再发情天数(P＞0.1 0 )和21日龄的平均窝仔数、仔猪腹泻率无显著影响(P＜0.05)。21日龄仔猪窝重随着饲粮赖氨酸浓度的增加而显著增加(P＜0.06)。初生至7日龄(P＜0.06 )、14日龄(P＜0.03)和21日龄(P＜0.01)的窝增重均随饲粮赖氨酸浓度增加而增加。产后14d猪乳蛋白Ⅱ组、Ⅲ组极显著(P＜0.01)高于Ⅰ组；固形物含量Ⅱ组显著(P＜ 0.05)高于Ⅰ组。产后21d猪乳固形物含量Ⅱ组显著(P＜0.05)高于Ⅰ组。泌乳期母猪血清尿素氮浓度Ⅰ组显著(P＜0.05，泌乳14d)、极显著(P＜0. 0 1，泌乳21d)高于Ⅱ组、Ⅲ组；白蛋白浓度Ⅱ组显著(P＜0.05)高于Ⅰ组。从本次试验的结果看出，在生产条件下，大长北母猪泌乳期饲粮赖氨酸水平以0.80％～ 1.00％为宜。%Thirty Large White×Landrace×Beijing Bla ck lactating(LW×LR×BB) sows were divided into three groups and were fed three di ets containing respectively 0.60％(Ⅰ)，0.8 0％(Ⅱ)，1.00％(Ⅲ) lysine to study the effec ts of dietary lysine levels on sow perfo rmance，blood and milk biochemical indexe s，and to estimate the appropriate dietar y lysine level in lactation diets．The re sults were as follows：The lysine levels in lactation diets h ad an unsignificant effect (P＞0.10) on sow body weight changes，feed intake at 21 days of lactation and dura tion (days) from weaning at day 21 of la ctation to estrus for LW×LR×BB．There was no remarkable difference( P＞0.05) on the average litter size and d iarrhea frequency at day 21 of lactatio n．Litter weight at day 21 increased ( P＜0.06) as dietary lysine increased．Simi lar effects were observed for litter wei ght gains from day 0 to 7( P＜0.06)，day 0 to 14 ( P＜0.03) and day to 21 ( P＜0.01)．At day 14 of lactation，milk protein was higher ( P＜0.01) in group Ⅱ，Ⅲ than those in group Ⅰ．DM was higher ( P＜0.05) in group Ⅱ than that in group Ⅰ． At day 21 of lactation，DM was higher ( P＜0.05) in group Ⅱ than that in group Ⅰ． At day 14 of lactation，serum urea nitrog en (SUN) in group I was higher ( P＜0.05) than in group Ⅱ and Ⅲ．At day 21， SUN in group I was higher ( P＜0.01) than that in group Ⅱ and Ⅲ．ALB i n group Ⅱ was higher ( P＜0.05) than that in group Ⅰ． The results suggested that lysine level in the lactating diets should be 0.80％－1 ．00％．
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