THE FLORISTIC AND STATIONAL CHARACTERISATION OF THE GRASSLAND SUBTYPE AGROSTIS CAPILLARIS + TRISETUM FLAVESCENS FROM APUSENI MOUNTAINS, ROMANIA PUBLISHEDNicoleta Teodora Gârda, Florin Păcurar, Ioan Rotar, Anca Bogdan
The floristic composition of the semi – natural grasslands from Apuseni Mountains area differ from a station to another, depending on some factors like: the natural ones, the performed management, the land’s orography, by the area’s social-economic situations. The objective of this paper is to characterise the grassland subtype Agrostis capillaris – Trisetum flavescens which is present in the grasslands from the Gheţari – Poiana Călineasa Plateau in Gârda de Sus commune, Apuseni Mountains. The identification and description of the respective subtype was elaborated after the analysis of 37 floristic relevèes performed using the Braun - Blanquet modified method and, then, by applying some statistic indexes. In our study area, this grassland subtype occures at an altitude comprised between 1070 and 1337 m, the most frequent altitude being 1099 m. The floristic composition of this subtype differs rather much depending on the stational conditions. Thus, the species from Poaceae family are present in average by 48,4 %, with a minimum of 23,5 % and a maximum of 81 %. The Cyperaceae and Juncaceae families have a low participation, in average 1,01 %, in most of the cases not being at all present. The specie from the Fabaceae family are present with an average of 10,8 %, with a minimum of 0% and a maximum of 28 %. The most frequent particip[ation is by 6,5 %. The Fabaceae family has an almost normal dispersal – skewness = 0,74 and kurtosis = 0,36. The plants from other botanical families occur in average with 45,15 %, with a minimum of 16 % and a maximum of 75 %, the most frequent cover being 34,75 %. The participation data dispersal is almost normal, showing a slight concentration of data towards left (skewness = - 0,08) and a slight flat aspect (kurtosis - 0,56). Regarding the agronomic value of the grassland, it frames within the sixth class (VI), the category of grassland is medium and it can support an animal load of 0,81 – 1,00 UVM / ha.
phytocenosis; data distribution; cover; constancy clases