Abstract: This study was conducted to determine the effects of dietary supplementing arginine on nutrient di- gestibility,plasma biochemical parameters and concentrations of free amino acids （AA） in Huanjiang mini-pigs. （Method）Ten Huanjiang mini-pigs with body weight （BW） of （18.9 ±2.4） kg were used and randomly assigned into 2 groups （5 replicates with one pig per group）,representing supplementation with 0.83% arginine （experi- ment group） or 1.73% alanine （isonitrogenous control group） in a basal diet for 7 days. Daily feed intake,initial and final empty stomach BW were recorded,respectively;fecal samples were collected from day 5 to 7 for determi- ning the digestibility of routine nutrient by TiO2 indicator;blood samples were collected into heparin-coated tubes at the end of the trial for analyzing biochemical parameters and concentrations of free AA, respectively. （Result） Re- suits showed that argiuine supplementation increased the average daily gain and ratio of gain to feed （ P 〉 0.05 ）, as well as the apparent digestibilities of dry matter（P 〈0.05） and crude protein（P 〉0.05）,compared with the con- trol group;the plasma concentrations of AMM and alanine in pigs fed arginine-supplemented diet decreased （ P 〈 0.05 ）,while of the total protein, aspartate, glutamate and threonine increased （ P 〈 0.05 ）, as well as the total AA, branched chain AA/Aromatic AA, essential AA/nonessential AA （ P 〉 0. 05 ）, in comparison with the control group. （Conclution）These findings suggested that dietary supplementing arginine could increase digestion and ab- sorption of some nutrients,improve contents of some essential AA, which resulted in the increased protein synthesis and healthy growth of Huanjiang mini-pigs.

Key words: Arginine, Huanjiang mini-pig, Biochemical parameters, Amino acids

CLC Number: 

• S828