The Effects of Livestock Grazing on Biomass Variation and Reproduction of Festuca ovina L. and Alupecurus textilis Boiss. at the Rangelands of Alvares Ski Resort in Southeast of Sabalan

The aim of this study was to investigate the effects of different grazing intensity on biomass variation and reproductive effort of Festuca ovina L. and Alupecurus textilis Boiss. Three grazing intensity (light, medium and heavy) using the 4-factor method were determined. In each site, 3 transects with 50 meters long randomly were established and on each transect 10 bunch of species were selected and aboveground and underground sampling at the time of flowering stage was sampled. After separation of reproductive and vegetative organs and weighing the dry matter in both species, data for evaluating the reaction of plants against grazing and comparison sites to dry matter to different organs in the studied species, one-way analysis of variance and Tukey's test were analyzed using SPSS16 software. The results show that different intensities of grazing onthe total biomass and weight (stems, leaves, roots, inflorescences, biomass) and length (root, inflorescence and aerial height) have significant effect (P