Comparison of impatiens parviflora DC. biomass growing in two contrasting environments

Abstract

Small Balsam (Impatiens parviflora DC.) is one of the most widespread invasive plants in Europe. This annual species was introduced from Central Asia and since 19th century was increasingly spreading in our continent. The objective of our study was to analyse and compare biomass of Impatiens parviflora DC. growing in different habitats. Two contrasting environments in Kaunas city for the assessment in each area 20 plots of 1m2 size were chosen. Study was carried out during May-October of 2016. Each month 12 plants (among them the highest four, prevailing high four and the smallest high four) were sampled for gravimetric analysis. Dry mass of the roots, steams, leaves, flowers and seeds were studied. Our research revealed that Impatiens parviflora DC. differs in productivity depending on habitat type. Vegetation interval was longer for Impatiens parviflora DC. when compared to Impatiens glandulifera Royle and naturally growing Impatiens noli-tangere L. It shows intermediate position according to adaption of Impatiens parviflora DC. to Lithuania climate conditions and might be among variables causing wider spread of Impatiens parviflora DC. than Impatiens glandulifera Royle.