Aim.To analyse the patterns of ascorbic acid content in the green mass of Galega orientalis (Galega orientalis Lam.), Gale variety, cultivated under introductory conditions to develop an effective method for increasing feed production.Material and Methods. The influence of the following factors on the accumulation of ascorbic acid in plants was considered: pre‐sowing seed preparation, the presence of a cover crop (pea), cultivation conditions, meteorological factors and the biological age of the grass stand over a three‐year period.Results. It was established that the plant mass of Galega orientalis is a source of ascorbic acid after plants enter the generative phase of development with predominant localization of vitamins in the leaves (96%). Patterns were revealed of ascorbic acid accumulation in the green phytomass of Galega orientalis depending on average daily temperature during the vegetation period (r = ‐0.69) and specific leaf surface (r = ‐0.83‐0.88). Conclusion. The data obtained also indicate a statistically significant positive effect of using Baikal‐EM1 microbiological fertilizer for seed inoculation during preparation for sowing, and a negative effect of the cover crop on the accumulation of ascorbic acid in the plant mass of Galega orientalis in its virginal and generative periods of development.

The paper identifies photosynthetic pigments pools balance and phenolic compounds in suffruticous species of Vaccinium myrtillus L. and Vaccinium vitis-idaea L. on the Tundrinsky bor territory (Khanty-Mansi Autonomous Okrug - Yugra) for the purpose of ecological and biochemical assessment of the valuable plant species status. The authors carry out a comparative analysis of the studied biochemical parameters (chlorophyll a , chlorophyll b , carotenoids and phenolic compounds) of two species leaves, collected from two sample plots similar in landscape and soil and hydrological conditions of the weakly disrupted territory of the Tundrinsky bor territory. The analysis of the suffruticous species leaves for chlorophyll content revealed the following distribution of chlorophyll pools: chlorophyll a - 64,96%, chlorophyll b - 35,04% for leaves of Vaccinium myrtillus and chlorophyll a - 68,28%, chlorophyll b - 31, 72% for leaves of Vaccinium vitis-idaea . The average content of carotenoids and phenolic compounds of Vaccinium myrtillus leaves was 0,62 0,11 mg/g and 14,18 1,65 mg/g, respectively, in Vaccinium vitis-idaea leaves - 0,52 0,12 mg/g and 18,79 2,25 mg/g, respectively. The correlation analysis showed the presence of a direct average strength correlation (r = 0,4) between the levels of chlorophyll and phenolic compounds in the leaves of Vaccinium vitis-idaea .