The influence of mineral and organic - mineral fertilisation on the Hayfield vegetation from Banat (Romania) hill region

Absztrakt

In this study the objective was to determine the effects of mineral and organic – mineral fertilizers on the
vegetation cover of a hayfield from the hill area of western Romania, respectively Fibiş (Timiş County). The
average of the annual air temperature in this region is 10.7 oC and the average of the annual rainfall amount is
608 mm. The climate in the studied area is temperate continental with Mediterranean influences. The
experimental field was organized by setting 6 fertilisation variants (3 mineral and 3 organic – mineral
fertilisation variants) and a control non-fertilised variant. Every studied variant had three replicates. The
vegetation data were collected using the linear point quadrate method, thus calculating several vegetation
features. The vegetation features taken in account were: the botanical composition, the biodiversity (species
richness, Shannon and Simpson indexes), some ecological indexes (temperature, humidity, soil reaction and
light). The fertilisation influenced mainly the biodiversity and the light and soil reaction ecological spectre.