摘要
本试验旨在研究理想氨基酸模型下,不同饲粮氨基酸水平对泌乳母猪生产性能、血液指标及乳汁中氨基酸浓度的影响。选用200头体况、分娩时间相近的长白×约克夏杂交母猪,随机分成4组,每组设50个重复,每个重复1头母猪,分别饲喂总赖氨酸水平为0.9%(试验组1)、1.0%(试验组2)、1.1%(试验组3)和1.2%(试验组4)的饲粮,并通过添加5种合成氨基酸保证4组饲粮中可消化赖氨酸∶可消化缬氨酸∶可消化苏氨酸∶可消化含硫氨基酸∶可消化色氨酸的值(100∶85∶66∶60∶19)一致。结果表明:试验组2仔猪断奶窝增重分别比试验组1和试验组4提高了4.48%和4.34%(P<0.01),仔猪平均日增重分别比试验组1和试验组4提高了5.46%和4.74%(P<0.01);试验组2背膘厚损失比试验组4多0.57mm(P<0.05);试验组2血浆尿素氮浓度显著低于其他处理(P<0.05);试验组2血浆赖氨酸、苏氨酸、缬氨酸、蛋氨酸、异亮氨酸、瓜氨酸、谷氨酸、甘氨酸(P<0.01)和亮氨酸(P<0.05)浓度均极显著或显著低于试验组4,除赖氨酸和苏氨酸浓度与试验组1差异显著(P<0.05)外,以上其他氨基酸浓度与试验组1、试验组3差异不显著(P>0.05);试验组2血浆中总氨基酸浓度显著或极显著低于其他组(P<0.05或P<0.01),乳汁中赖氨酸浓度极显著低于试验组4(P<0.01),与试验组1、试验组3差异不显著(P>0.05),且缬氨酸(P<0.05)、异亮氨酸(P<0.05)、亮氨酸(P>0.05)、丙氨酸(P>0.05)、酪氨酸(P>0.05)和谷氨酸(P>0.05)浓度以试验组2最高。由此可知,理想氨基酸模型下,泌乳母猪赖氨酸摄入量为59g/d(饲粮赖氨酸水平为1.0%)时,能够获得最高的氨基酸利用率和最好的生产性能。
The study was conducted to investigate the effects of four dietary amino acid levels on the productive performance,blood indices and amino acid concentrations in milk of lactating sows based on ideal dietary amino acid pattern.Two hundred Large White×Landrace sows,with similar body conditions and parturition dates,were allocated to four groups with fifty replicates per group and one sow per replicate.The sows were fed with four diets with total lysine levels of 0.9%（trial group 1）,1.0%（trial group 2）,1.1%（trial group 3）and 1.2%（trial group 4）and the same digestible amino acid pattern（digestible lysine∶digestible valine∶digestible threonine∶digestible sulphur amino acids∶digestible tryptophane=100∶85∶66∶60∶19）by adding synthetic amino acids.The results showed that weaning litter weight gain in trial group 2 was higher than that in trial groups 1 and 4 by 4.48% and 4.34%（P0.01）;average daily weight gain in trial group 2 was higher than that in trial groups 1 and 4 by 5.46% and 4.74%（P0.01）.Backfat thickness loss in trial group 2 was higher than that in trial group 4 by 0.57 mm（P0.05）.The concentration of plasma urea nitrogen in trial group 2 was significantly lower than that in the other groups（P0.05）.The concentrations of plasma lysine,threonine,valine,methionine,isoleucine,citrullinde,glutamate,glycine（P0.01）and leucine（P0.05）in trial group 2 were significantly lower than those in trial group 4,and there was no significant difference with those in trial groups 1 and 3（P0.05）expect that the concentrations of plasma lysine and threonine in trial group 2 were significantly lower than those in trial group 1（P0.05）.Plasma total amino acids in trial group 2 were the lowest（P0.05 or P0.01）.The concentration of lysine in milk was significantly lower than that in trial group 4（P0.01）,but there was no significant difference with trial groups 1 and 3（P0.05）;the concentrations of valine（P0.05）,isoleucine（P0.05）,leucine（P0.05）,alanine（P0.05）,tyrosine（P0.05）and glutamate（P0.05）in milk in trial group 2 were higher than those in the other groups.In conclusion,based on ideal dietary amino acid pattern,when the daily total lysine intake was 59 g/d（1.0% lysine in a diet）,the lactating sows could have the highest amino acid utilization and the best productive performance.
出处
《动物营养学报》
CAS
CSCD
北大核心
2010年第4期863-869,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
关键词
氨基酸模型
生产性能
血液指标
氨基酸浓度
泌乳母猪
amino acid pattern
productive performance
blood indices
amino acid concentrations
lactating sow
