As a significant branch of system biology, metabolomics has been extensively applied to various fields, which detects massive endogenous metabolites simultaneously. It can be used to study metabolite changes in the level of metabolism, and plays an important part to furtherly understand metabolic networks and discover new functional genes. Currently, metabolomics is mainly used to study the effect of different factors (plucking position, development stages, season, environmental factor, habitat, processing condition, etc.) on chemical component...