新聞動態

【技術】與傳統DL-蛋氨酸對比,飼喂L-蛋氨酸對保育期仔豬生長性能和腸道健康的影響

發布時間: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:通過兩個實驗證明L- Met在保育期仔豬生長性能和腸道健康方麵是否比DL- Met有更好的作用。實驗156欄共168頭豬被隨機分成7個處理組,分別是基礎日糧組(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),試驗期為20天。每5天記錄體重和飼料消耗量來計算生長性能。實驗220頭獨立飼養的保育豬隨機分成2個處理組,分別是DMLBD+0.145%DL-Met中的0.16%Met)、LMETBD+0.145%L-Met中的0.16%Met),試驗期為20天。所有的處理組符合95%NRC規定的Met需要量。在試驗結束時收集所有試驗豬的十二指腸樣品來評估腸道形態和氧化還原水平。結果:實驗1在整個20天的飼養試驗期間,飼喂L-Met的比飼喂DL-Met的仔豬有更高的ADG (P=0.087)和更低的血液尿素氮(P<0.01)L-Met在平均日增重和飼料轉化率中的相對生物利用率分別是DL-Met143.8%122.7%。實驗2:飼喂L-Met的比飼喂DL-Met的仔豬在十二指腸中有更高的GSH(穀胱甘肽)濃度、絨毛高度和深度(P<0.05)、更低的蛋白羰基濃度(P<0.05)。結論:與DL-Met相比,L-Met作為一種Met添加來源,在保育仔豬中可以通過減少氧化應激和提高GSH濃度來促進十二指腸的絨毛發育,並提高了平均日增重和降低血液尿素氮濃度。

——本文由廣州AG亚游集团生物科技有限公司翻譯



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.


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