The study regarding floristic composition of tailings dumps from Moldova Noua, in order the reconstruction ecological

Abstract

In Moldova Nouă, the main pollutant is the ex-decantation lake in Tăuşani, belonging to the S.C. Moldamin S.A. During the period 1988-1990, the Caraş-Severin County Enterprise for the Maintenance and Exploitation of the Grasslands executed land modelling works on the slopes by planting perennial grasses in mixture. Since the completion of the modelling and planting of the slopes of the decantation lakes failed, there have been tailings dust pollution carried away by the very strong air currents. In this paper, we present a study of the floral composition of the tailings dumps in Moldova Nouă and a situation of the plant species resisting in this area. The inventorying of the plant species growing on the managed dumps has been done with the Braun-Blanquet method (1964), a method cited by Arsene (2003). We identified the measure in which the floristic composition has changed, the new species produced through self-seeding and we identified the dominant species. Results concern the structure of the plant cover already existing on the tailings dumps in Moldova Nouă from the point of view of the main technological groups of plants and of the biodiversity. In order to include the dumps in the Moldova Nouă area into the economic cycle, we need to re-cultivate it. Re-vegetation should be done with perennial plants and weeds specific to the area (Trifolium pratense, Trifolium repens, Festuca rubra, Dactylis glomerata, Achillea millefolium, Lotus corniculatus, etc.), that are not soil demanding, that are diseaseresistant and that produce large amounts of vegetal material both underground and on the ground. The highest percentage of seedling was in the acacia, Russian silverberry, bird cherry, lilac, and sea-buckthorns.