The purpose of this work is to provide useful pieces of information concerning plant species invasion phenomenon in Romanian grasslands. Researches were realized during 2003-2005 on 26 permanent grasslands situated in places with different environmental conditions from Banat region (western Romania). Grasslands studied in this work show a great soils variety. Here we are interested about nitrogen, phosphorus and potassium supply. Thus is quantified the comportment of herbaceous invasive species under the influence of soil NPK supply. For this purpose here is calculated the correlation considering as dependent variable annual coefficient of grassland surface occupation (spreading coefficient) with herbaceous invasive species.

herbaceous invasive species; NPK supply; grassland; correlation

Presentation: oral