Effect of Medium-chain Triglyceride (MCT) on Growth Performance, Nutrient Digestibility, Blood Characteristics in Weanling Pigs

作者：S. M. Hong, J. H. Hwang1 and I. H. Kim*
Department of Animal Resource and Science, Dankook University, Cheonan, Choognam 330-714, Korea

来源：Asian-Aust. J.Anim.Sci. Vol.25, No.7 :1003 - 1008  July 2012   

翻译：肠动力研究院

摘要：本研究是为了评估中链脂肪酸甘油酯（MCT）对断奶仔猪的生长性能、表观消化率和血液指标的影响，总共用120头刚断奶仔猪，进行了2个实验，实验1（21日龄，6.91±0.99kg)，实验2（28日龄，10.20±1.09kg），实验分别持续了42天和35天。两个实验使用同样的四种日粮：1.负对照组（NC）；2.正对照组（PC），负对照（NC）+  抗生素（40mg/kg泰妙菌素+110mg/kg泰乐菌素+10mg/kg恩拉霉素）；3. MCT3组，NC +0.32%MCT（阶段1、2、3）；4. MCT5组，NC +0.55%MCT（阶段1），0.32%MCT（阶段2和阶段3）。实验1，在实验开始头2周，对比负对照组，饲喂MCT5日粮的仔猪日增重显著提高（p<0.05）；与PC组相比，MCT3组在实验第15-28天，能量的表观消化率显著提高（p<0.05）；对血液指标（红细胞、白细胞、免疫球蛋白G、淋巴细胞浓度）的影响差异不显著。实验2，与PC组相比，在实验第0-14天，MCT5组的日增重显著提高（p<0.05）；相比NC组，PC组的日采食量显著降低（p<0.05），饲料转化率显著（p<0.05）提高，然而，在实验第15-35天和整个阶段，MCT组、NC组或PC组，日采食量和饲料转化率差异不显著；相比NC和PC组，在实验第二和第五周结束时，MCT5组的干物质和氮的表观消化率显著提高（p<0.05）；相比PC组，MCT3组能量消化率显著提高（p<0.05）；对血液指标（红细胞、白细胞，免疫球蛋白G,淋巴细胞浓度）的影响差异不显著。实验结果表明：在断奶早期（头两周），断奶仔猪饲料中添加MCT能提高日增重和消化率，对血液指标的影响小。

表1. 实验1和实验2的保育猪基础日粮的组成

表2. 中链脂肪酸甘油酯（MCT）对断奶仔猪生长性能的影响（实验1）

表3. 中链脂肪酸甘油酯（MCT）对断奶仔猪表观消化率的影响（实验1）

表4. 中链脂肪酸甘油酯（MCT）对断奶仔猪第42天血液指标的影响（实验1）

表5.中链脂肪酸甘油酯（MCT）对断奶仔猪生长性能的影响（实验2）

表6. 中链脂肪酸甘油酯（MCT）对断奶仔猪表观消化率的影响（实验2）

表7.中链脂肪酸甘油酯（MCT）对断奶仔猪第35天血液指标的影响

ABSTRACT: One hundred and twenty weanling pigs in experiment 1 (Exp. 1) (6.91±0.99 kg; 21 d of age) and Exp. 2 (10.20±1.09 kg; 28 d of age) were used in two 42-d and 35-d experiments to evaluate the effect of medium-chain-triglyceride (MCT) on growth performance, apparent total tract digestibility (ATTD) of nutrients and blood profile. In both of Exp. 1 and Exp. 2, the same dietary treatments were utilized as follows : i) negative control (NC), ii) positive control (PC), NC+antibiotics (40 mg/kg Tiamulin, 110 mg/kg Tylosin, and 10 mg/kg Enramycin, iii) MCT3, NC+0.32% (phase 1, 2 and 3) MCT, and iv) MCT5, NC+0.55% (phase 1), 0.32% (phase 2 and 3) MCT. In Exp. 1, the pigs fed MCT5 diets had higher (p<0.05) ADG compared to NC treatment during the first 2 wk. From d 15 to 28, the ATTD of energy was improved (p<0.05) by MCT3 compared to the PC treatment. No effect has been observed on the blood profiles [red blood cell (RBC), white blood cell (WBC), immunoglobulin-G (IgG), lymphocyte concentration] measured in this study. In Exp. 2, the ADG were increased (p<0.05) by the MCT5 treatment than the PC treatment from d 0 to 14. Pigs fed PC treatment diet had lower ADFI (p<0.05) and better FCR (p<0.05) than NC treatment, whereas no differences were shown between MCT treatments and NC or PC treatment from d 15 to 35 and overall phase. The ATTD of DM and nitrogen were improved (p<0.05) by the effect of MCT5 related to the NC and PC treatment at the end of 2nd and 5th wk. The pigs fed MCT3 had higher (p<0.05) energy digestibility than PC treatment. No effects were seen in the blood profiles we measured (WBC, RBC, lymphocyte and immunoglobulin-G). In conclusion, the addition of MCT in the weanling pigs diet can improve the ADG and digestibility during the earlier period (first 2 wks), but had little effect on the blood characteristics.

Key Words:Blood Profile, Digestibility, Growth Performance, Medium-chain-triglyceride (MCT), Pig)

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