The experience of cultivating the Polygonum weyrichii under conditions of long-term introduction in the Siberian Botanical Garden

Polygonum weyrichii F. Schmidt is an unconventional perennial crop of multifunctional importance, promising for creating long-term plantations in the soil and climatic conditions of the taiga zone of Western Siberia. The article presents the results of a study of the biological characteristics of the Polygonum weyrichii. In 2022–2024 the duration of all stages of plant development, the dynamics of shoot growth, and the productivity of green mass and seeds have been determined in the collection nursery of the Siberian Botanical Garden of Tomsk State University on a Polygonum plantation (age over 50 years). An important physiological indicator of plants is the characteristic of the pigment complex. The total chlorophyll content in the leaves was relatively high throughout the growing season (25.94–28.55 micrograms/cm2). The accumulation of flavonoids in the leaf epidermis increased from the flowering phase to maturation (1.45–1.88 micrograms/cm2), the nitrogen balance index decreased towards the end of the growing season. Under the conditions of a long-term introduction experiment, this species proved to be a stable introducer, well adapted to local soil and climatic conditions. Thanks to seed and vegetative propagation, it is possible not only to maintain the old plantation, but also to spread the Polygonum weyrichii to new areas outside the main plantation.

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