Nutritional evaluation of mungbean [Vigna radiata (L.) R. Wilczek] meal vermicelli by-product as feed for swine

The nutrient composition of MBMV [mungbean meal vermicelli] from the different sources showed very wide values. No significant differences were observed in nutrient composition, amino acid and fatty acid contents between sun-dried and oven-dried MBMV. The MBMV contained an average of crude protein, ether extract and crude fiber contents, 13.08-22.60, 0.46-2.06 and 14.78-35.50 percent, respectively. The drying process for MBMV did not significantly affect the digestibility of different nutrient and metabolizable energy of MBMV during the growing (30 kg) stage. In the finishing (60 kg) period, the digestibility of nutrients and metabolizable energy of sundried and oven-dried MBMV were similar, except that of the apparent digestible crude protein of sun-dried MBMV which was higher (P0.01) than that of oven-dried MBMV. Furthermore, older animals could utilize MBMV more efficiently than younger ones. MBMV replacement affected (P0.05) production performance at the growing pig stage. The average daily gain, feed intake, metabolizable energy (ME) intake and crude protein (CP) intake quadratically increased with increased in the level of MBMV in the ration but the length of feeding days quadratically decreased. The protein efficiency ratio (PER) and feed conversion ratio (FCR) linearly decreased with increasing level of MBMV in the diet. In the finishing period, the production performance of pigs on all levels of MBMV was not significantly different. However, pigs fed the 75 percent MBMV replacing rice bran had the best production performance and those on 100 percent MBMV replacement had the poorest. The results indicated that for every percentage increase of MBMV replacing rice bran the daily feed intake, ME intake and CP intake linearly increased. On the other hand, the PER and FCR of animals both linearly decreased. Addition of amino acid in low protein diet with high MBMV failed to improve production performance of the animals. Amino acids supplementation at level equivalent to 105 percent NRC requirement improve the production performance in terms of average feeding period, daily gain, protein efficiency ratio and feed conversion ratio of the high level MBMV diet in growing-finishing pigs, but was not comparable to corn-soy diet. It requires higher nutrient density in the diet especially crude protein or increase more amino acid level supplementation in high MBMV diet