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【技术】与传统DL-万博manbetx平台网址对比,饲喂L-万博manbetx平台网址对保育期仔猪生长性能和肠道健康的影响

发布时间:2015-08-14

 

Effect of feed grade L-methionine on growth performance and guthealth in nursery pigs compared with conventional DL-methionine

Y. B. Shen; A. C. Weaver; S. W. Kim

J. Anim. Sci. 2014.92:5530–5539

摘要:通过两个实验证明L- Met在保育期仔猪生长性能和肠道健康方面是否比DL- Met有更好的作用。实验156栏共168头猪被随机分成7个处理组,分别是基础日粮组(BD55%NRC要求的Met需要量)、BD+0.048%L-MetDL-Met75%NRC要求的Met需要量)、BD+0.096%L-MetDL-Met100%NRC要求的Met需要量),试验期为20天。每5天记录体重和饲料消耗量来计算生长性能。实验220头独立饲养的保育猪随机分成2个处理组,分别是DMLBD+0.145%DL-Met中的0.16%Met)、LMETBD+0.145%L-Met中的0.16%Met),试验期为20天。所有的处理组符合95%NRC规定的Met需要量。在试验结束时收集所有试验猪的十二指肠样品来评估肠道形态和氧化还原水平。结果:实验1在整个20天的饲养试验期间,饲喂L-Met的比饲喂DL-Met的仔猪有更高的ADG (P=0.087)和更低的血液尿素氮(P<0.01)L-Met在平均日增重和饲料转化率中的相对生物利用率分别是DL-Met143.8%122.7%。实验2:饲喂L-Met的比饲喂DL-Met的仔猪在十二指肠中有更高的GSH(谷胱甘肽)浓度、绒毛高度和深度(P<0.05)、更低的蛋白羰基浓度(P<0.05)。结论:与DL-Met相比,L-Met作为一种Met添加来源,在保育仔猪中可以通过减少氧化应激和提高GSH浓度来促进十二指肠的绒毛发育,并提高了平均日增重和降低血液尿素氮浓度。

——本文由广州万博manbetx官网网址生物科技有限公司翻译



Effect of feed grade L-methionine on growth performance and guthealth in nursery pigs compared with conventional DL-methionine

Y. B. Shen; A. C. Weaver; S. W. Kim

J. Anim. Sci. 2014.92:5530–5539

ABSTRACT:Two experiments were conducted to test if supplementation of L-MET has beneficial effects on growth performance and gut health in nursery pigs compared with DL-Met. In Exp. 1, 168 pigs in 56 pens were randomly allotted to 7 dietary treatments for 20 d, including a basal diet (BD;55% of the NRC requirement for Met), the BD + 0.048% L-Met or DL-Met (70% of the NRC requirement), the BD + 0.096% L-Met or DL-Met (85% of the NRC requirement), and the BD + 0.144% L-Met or DL-Met (100% of the NRC requirement). Body weight and feed disappearance were recorded every 5d for computation of growth performance. In Exp. 2, 20 individually housed nursery pigs were randomly allotted to 2 dietary treatments for 20 d: D-ML (0.16% Met from the BD + 0.145% supplemental DL-Met) or L-MET (0.16% Met from the BD + 0.145% supplemental L-Met). Both diets had Met meeting 95% of the NRC requirement. Duodenum samples from all pigs were collected at the end of the trial to evaluate morphology and redox status. In Exp. 1, during the entire 20 d, pigs fed diets supplemented with l-Met tended to have greater (P=0.087) ADG and reduced (P<0.01) plasma urea nitrogen (PUN) than pigs fed diets supplemented with DL-Met. The relative bioavailability (RBA) of L-Met toDL-Met for ADG and G:F was 143.8 and 122.7%, respectively. In Exp. 2, pigs fed a diet supplemented with l-Met had duodenum tissue with greater (P<0.05) concentrations of glutathione (GSH) and greater villus height and width as well as lower (P< 0.05) concentrations of protein carbonyl compared with pigs fed DL-Met. Overall, compared with DL-Met, the use of L-Met as a source of supplemental Met in nursery pig diets enhanced duodenum villus development in association with reduced oxidative stress and improved GSH. The beneficial effects of supplementing L-Met compared to DL-Met in gut of nursery pigs resulted in a potential enhancement of ADG and reduction of PUN.

Key words:amino acid, growth performance, gut health, methionine, nursery pigs.