БИОЭКОЛОГИЧЕСКИЕ ОСОБЕННОСТИ STEVIA REBAUDIANA BERTONI ПРИ ИНТРОДУКЦИИ В УСЛОВИЯХ СУРХАНДАРЬИНСКОЙ ОБЛАСТИ

Аннотация

Subjects of research: Stevia rebaudiana Bcrtoni is a perennial tropical short-day plant belonged to Asteraceae family on introduction of Surkhandarya region. Purpose of work: study of bioecological features of Stevia rebaudiana Bcrtoni in Surkhandarya region conditions. Methods of the research: laboratory tests and field studies, phonological, morphological, biometric and statistical methods, introduction assessment. The results obtained and their novelty: bioecological features of the tropical plant Stevia rebaudiana were studied for the first time during ontogenesis phases in the climatic conditions of Surkhandarya region. Data on flowering, harvesting and seed regeneration were obtained. Resistance to low winter temperatures, ability to propagate by seeds and natural regeneration for perennial plants, ability to provide large quantities of phytomass with high concentration of stevioside in the leaves were revealed. Practical value: information on possibility of seed propagation for Stevia rebaudiana and extraction of stevioside from the leaves was obtained. Recommendations on planting terms, mowing of the green mass, seeds gathering and cultivation activities for the conditions of Surkhandarya region were developed. The obtained results can be used at higher educational institutions. Degree of embed and economic effectivity: developed recommendations are being used by experimental farm «Ollohiyor-oxun» in Shurchi district of Surkhandarya region (certificate № 1, dated by 25.01.2011) and in curriculum at the Botany Department of Termez State University (certificate № 1, dated by 15.03.2011). Field of application: introduction, medical plant industry, pharmaceutics, food production.