Ecological stability of Stevia in Ukraine

Abstract

The purpose. Study of ecological stability of Stevia of cultivar Bereghinia as a result of interaction of system «plant — ecological environment». Methods. Field, calculus. Results. Influence of seed spacing of plants of Stevia and agroclimatic zones of Ukraine on maturity and technological quality is studied. It is shown that in climatic conditions of Ternopol oblast plants of Stevia attain maturity for 5 days earlier than in Kiev and Vinnitsa oblasts. That is stipulated by optimum May-June temperature (15 – 17°C) for vegetation growth of plants of Stevia. It is fixed that more stable pliability plants of Stevia manifest in subzone of unreliable moistening at seed spacing 100000 seeds/hectare (0,388; 0,397). Conclusions. It is fixed that optimum seed spacing of plants for subzone of sufficient and unstable humidification is 45x16 cm that ensures production of leaves of high quality with PLPm 6,5 – 7,0 cm3. As to importance of stability Stevia is nonresistant and depending on agricultural methods can change extent of ecological pliability.