C. Grozavu


RESEARCHES CONCERNING THE FLORAL COMPOSITION AND GRAZING VALUE OF AN AGROSTIS TENUIS-FESTUCA RUBRA PASTURE, FROM VÂNATORI-NEAMT NATURAL PARK

C. Grozavu, I.M. Pop, Cristina Gabriela Radu-Rusu

Abstract
The pastures from the range of Vânători Neamţ Natural Park, which belongs to Tg. Neamţ Forestry Office, are comprised in the nemoral level, especially in the sub-section represented birch forests and mixture of birch with coniferous species. Small participation is represented by the pastures from watersides and depressions (especially the Lolium perene–Trifolium repens and Festuca pratensis – Poa pratensis types). In the studied area, the Agrostis tenuis-Festuca rubra spontaneous pasture was considered as representative. Relatively to its floral composition, assessed through the double meter method, several botanic families have been identified, containing a various amount of species: Gramineae (12 taxons)-specific contribution=92.96%, Leguminosa (4 taxons)-specific contribution=3.38% and Different other plants (12 taxons)-specific contribution=3.66%. Through the usage of data related to specific contribution and quality index for the species identified in Agrostis tenuis – Festuca rubra pasture, the final score of the grazing value was achieved, respectively 51.77. Thus, the edge value of 50% from the pasture classifying referential has been passed. The calculation of grazing capacity revealed a value of 1.29 UVM/ha. These data allowed us to classify the pasture in the IInd quality class: “GOOD”. The vegetal mass from the studied pasture could be successfully used in the feeding of bison from Vânători-Neamţ, through grazing or harvesting and giving at mangers during summer time or as hay, during cold season.

Key words: pasture, Agrostis tenuis, Festuca Rubra, grazing value, bison