Abstract: This paper studied the dynamic changes of the biochemical compositions of Misgurnus anguillicaudatus under 20 days’starvation and subsequent 8 days’refeeding at 18±0.5 ℃.The results showed that in the first 15 days of starvation,the lipid and protein contents decreased significantly,but after then,protein decreased continuously,while lipid did not decrease any more,which suggested that M.anguillicaudatus consumed both lipid and protein firstly,but then mainly utilized protein as energy source.After refeeding,both lipid and protein contents increased rapidly,and recovered to their initial levels.The water and ash contents increased during starvation,but decreased in subsequent refeeding.After 20 days^, starvation,saturated fatty acids remained relatively stable,while mono- and poly-unsaturated fatty acids had a definite decrease and increase,respectively.During starvation,n-3 fatty acids increased,but n-6 fatty acids decreased slightly.

Key words: Soil quality, Assessment indicator, Hilly Loess Plateau