Competition-Productivity Relationship Between Some Common Grasses and Forbs Plant Species in High Altitude Rangelands

Facilitation or competition occurs among plant species when one alter ameliorates the environment for another needs same sources of species. The objective this study was to determine facilitative competitive effect on Bromus variegatus, Festuca ovina, Koeleria cristata growing with isolated, Medicago papillosa, Astragalus microcephalus, Thymus parviflorus, and Hypericum scabrum, arranged in completely randomized design. Plant height, above-and belowground biomass, relative neighbor (RNE) significantly affected main, some first- second-order interaction depending year, grasses species, surrounding. Aboveground biomass increased grasses, which grow legume significant differences were determined between grass years. While average 26,66 g/plant, grown M. papillosa A. microcephalus positively it 31,58 34,99 gr/plant, respectively. had a aboveground RNE other effect. All RNE.