This study was conducted to determine effects of N-carbamylglutamate (NCG) on growth performance, nutrient digestibility and plasma free amino acid concentrations in growing pigs. Ten Huanjiang mini-pigs with an average body weight (BW) of (12.6±1.7) kg were used and randomly assigned into two groups (five replicates with one pig per replicate), representing supplementation with 0 or 0.1% NCG in a basal diet for 10 days. Daily feed intake, initial and final BW were recorded, respectively; fecal samples were collected from day 8 to 10 for determining the digestibility of routine nutrients by TiO2 indicator; blood samples were collected on day 10 for analyzing biochemical parameters and concentrations of free amino acids (AA), respectively. Results showed that compared with the basal diet group, 0.1% NCG supplementation significantly increased the average daily gain (P<0.05), and decreased the ratio of gain to feed (P<0.05). The apparent digestibility of crude protein, crude fat and dry matter were increased (P>0.05). Plasma alkaline phosphatase activity was significantly increased (P<0.05), while the plasma concentrations of urea nitrogen, ammonia and low-density lipoprotein were significantly decreased (P<0.05). The plasma concentrations of total amino acid, essential amino acid, aromatic amino acid, phenylalanine and methionine of pigs fed the diet supplemented with 0.1% NCG were higher than those of pigs fed the basal diet (P<0.05). These findings suggest that 0.1% NCG supplementation can promote the digestibility of nutrients, improve AA balance, and then increase the growth performance, which may provide some scientific information for the application of NCG in diets of Huanjiang mini-pigs.
ZHOU Xiaoli, YIN Yulong, KONG Xiangfeng, TANG Wenjie, HE Qinghua
. N-Carbamylglutamate Affects Growth Performance, Nutrient Digestibility and Plasma Concentrations of Free Amino Acids in Huanjiang Mini-Pigs[J]. Chinese Journal of Animal Nutrition, 2011
, 23(11)
: 1970
-1975
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DOI: 10.3969/j.issn.1006-267x.2011.11.018
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