Analysis on nutrition components in Rhodotorula mucilaginosa

To analyze the nutritional level of Rhodotorula mucilaginosa and evaluate its nutritional value and the development prospects as feed ingredients, the concentrations of nutritional components, amino acids, fatty acids, β-carotene, vitamin E, nucleotides and astaxanthin were determined in this study. The results showed that contents of crude protein, crude fat, total sugar and ash in R. mucilaginosa were 49.2%, 1.5%, 22.3%, and 7.9%, respectively. 16 amino acids were detected, including 7 kinds of essential amino acids, which accounted for 36.77% of the total amino acids.Moreover, 6 kinds of fatty acid were detected. They were tetradecanoic acid, palmitic acid, stearic acid, oleinic acid,linoleic acid and linolenic acid, accounting for 0.29%, 8.64%, 5.41%, 35.38%, 28.97% and 21.31%, respectively. The contents of β-carotene, vitamin E, nucleotides and astaxanthin were 1.40, 172.00, 170.00 and 1.00 mg/kg, respectively.The results indicated that R. mucilaginosa was a good feed ingredient with high nutritional value, and could be used as a substitute for protein sources like fishmeal. Therefore, R. mucilaginosa has good market prospects and development potential.