Phenology of Atriplex verrucifera M.Bieb. species in the rangelands of West Azarbaijan in different years

Study of the Phenology is the most important ecological issues and it can be a foundation for Resource Management. Phenology Recognition of different rangelands species in relation of grazing management and sustainable utilization of rangelands forage is an important issues. Without knowing Phenology of different rangelands species is not possible to determine the grazing season and grazing management and livestock. Therefore in order to determine of Entering livestock time and on time exit of the rangeland، phenology of Atriplex verrucifera as dominant species In the semi-steppe rangelands of Uromieh Tzkhrab and Soil moisture condition Was studied. The interpretation of Phonological stages was done by climate data. Result showed that the beginning of July to Second half of June and the end September to late October is the best time to start grazing of the Atriplex verrucifera species. Also Soil moisture result showed livestock entrance to rangeland in the late May will not cause a problem.