Evaluation on the Quality of Auricularia auriculas Based on Dust of Cassava Stalks

PurposeTo evaluate and screen the black fungus (Auricularia heimuer) lines which were suitable for cultivation based on dust of cassava stalks.

MethodsHPLC technique was used to detect for ten lines of black fungus, the close degree and evaluation of amino acids were evaluated for their nutritional quality.

ResultsTen lines of black fungus grew well with an average per bag yield of (518.41±25.90) g, and the highest per bag yield was C67 (766.00±38.30) g. In terms of quality indexes, the total sugar content of C67 was the highest (37.87±2.27) mg/g, while the trehalose and glucose contents of AC11 were the lowest, which were (18.89±1.06) and (4.82±0.13) mg/g, respectively. The close degree of proteins contents of ten lines of black fungus and whole egg proteins were from 0.678 to 1.040, and the index of C26 was the highest, which was similar to the nutritional level of whole egg. Evaluation results of amino acids showed that the RC value of five kinds of amino acids in five black fungus lines was greater than one, which was showed amino acids were excessive, while the isoleucine and tryptophan were the 1st or the 2nd limiting amino acid among black fugus. The SRC value analysis showed that the amino acid nutritional quality of C26 was the best.

ConclusionIt is feasible to cultivate black fungus cultivated based on dusts of cassava stalks, but there are significant differences in adaptability and nutritional quality between lines of black fungus, so it is necessary to select adaptable black fugus lines before cultivation.