Background : We have done dynamic study of tannin and total flavonoid contents in samples of Iridaceae such as Iris bungei maxim, Iris tenuifolia Pall, Iris lactea Pall and Iris dichotoma from 2017 April to 2017 Oct. Those 4 samples were prepared from Khuld sum of Dundgobi, Tsogttsetsii sum of Umnugobi, Altanbulag soum of Tuv province and the Botanical Garden 2 of Medicinal plants of Drug Research Institute. Goal: The purpose of this study is to determine how does change biological active compounds in Iridaceae species that depending on growing season and to describe which harvesting period is efficient to use. Materials and Methods: The chemical contents were analyzed with the colorimetric assay, volume metric analysis method and spectrophotometric method. Result In result of study, there was shown differences in bioactive substance of each Iridaceae, overall content of polyphenolt compound and total flavonoid highest from April to June. But, the bioactive substance in the Iris dichotoma was the highest in August and constantly increased in May to August then constantly decreased in September and October. Comparisons between Iridaceae; the highest concentration of bioactive substance was Iris tenuifolia Pall and the lowest concentration bioactive substance was Iris lactea Pall.

Background: Selected three sorts of Seabuckthorn have been being planted since 2000 in the Botanical garden of Medicinal plants of “Monos” group, Mongolia. The chemical compositions of leaves were investigated from May 2017 to October 2017. In study, we had sampled at several month and determined content of tannin, total flavonoid, total organic acid and polysaccharide and antioxidant activity during growing seasons. Goal: The purpose of this study is to determine how does change biological active compounds in the Sea-buckthorn leaves that depending on growing season and to describe which harvesting period is efficient to use. Seabuckthorn leaf samples were prepared from such as: Chuiskaya, Oranjivaya and Obilniya on their chemical composition depend from harvesting season. Materials and Methods: The chemical contents were analyzed with the colorimetric assay, volume metric analysis method and spectrophotometric method. Result: For sorts we studied, content of tannin was 17.66% in Orangevaya sort, total content of flavonoid was 0.39% in Chuskaya sort, total antioxidant activity was IC50- 9.38 mg/ml in Obilnaya sort, total acid content was 2.4% in Orangevaya sort, and content of Polysaccharide was 10.24% in Obilnaya sort. Conclusion The results from this study, there was shown differences in bioactive substance of each sorts, overall content of tannin July to August, total flavonoid May to July, and antioxidant activity in June, were high.